merc 300r OB....16mph gain

[DaveH]

its not a waste gate...that slows a supe charger down to limit boost. you CAN NOT slow the merc mechanical super charger (without mechanically changing puleys), only vent off excess.

its also recircuited, so there are limits to this as the intake temps skyrocket when recirculating significant amounts of boost.

 

[Bigbore500r]

you are correct, this was done to maintain consistent power levels for varying atmospheric/altitude scenarios.

so at sea level, can you tell me what boost a stock 450r should make?

I dont know what they run stock, but if I knew how much boost it was already running (or what HP it made in naturally aspirated trim)- we could roughly calculate how many more PSI would be required to gain 120 horsepower.

120 horsepower has to be adding boost, that is a 27%+ increase. the only other way to pick up that kind of power would be to increase the rev limit, if it continued to make power beyond the factory rev limit to the tune of 120HP. That would be alot of RPM to net that gain.

I could be wrong, but power gains on a motor of that size doesn't come that easily unless boost is added....99.9% of the time!

 

[DaveH]

well i just tested a 300r that had to have picked up AT LEAST 80hp to do what its doing now......close to your impossible 30%....and there aint no super charger.

 

[Runs2rch]

its not a waste gate...that slows a supe charger down to limit boost. you CAN NOT slow the merc mechanical super charger (without mechanically changing puleys), only vent off excess.

its also recircuited, so there are limits to this as the intake temps skyrocket when recirculating significant amounts of boost.

Yeah it is just a simple boost bypass.

 

[Livewire Fabworks]

Noticed on Motec's website they have a set up for the 520-565 platform. Pretty cool as no one offers tunes for these and I haven't heard of anyone tuning these other then whipple that got their hand slapped.

 

[Bigbore500r]

well i just tested a 300r that had to have picked up AT LEAST 80hp to do what its doing now......close to your impossible 30%....and there aint no super charger.

For the 300 that's making +80hp - what was the increase on the rev limiter?
Other than optimising timing and AFR (which are gonna net smaller gains...) - the only way to make that kind of power increase on motors of this size range, is to spin them faster, or for the 450 - add boost (and possibly ALSO spin it faster...which could also add more boost if the bypass valve isn't dumping it at a presribed factory limit)

Just wanted to say - i'm not doubting any of this, all I was saying regarding the Verado 450 making +120 HP is "there's gonna be a boost increase for that".
Not trying to poke holes in the performance gains, just curious how its getting there....
Inquiring minds wanna know! Spill the beans!

 

[DaveH]

I dont know what they run stock, but if I knew how much boost it was already running (or what HP it made in naturally aspirated trim)- we could roughly calculate how many more PSI would be required to gain 120 horsepower.

120 horsepower has to be adding boost, that is a 27%+ increase. the only other way to pick up that kind of power would be to increase the rev limit, if it continued to make power beyond the factory rev limit to the tune of 120HP. That would be alot of RPM to net that gain.

I could be wrong, but power gains on a motor of that size doesn't come that easily unless boost is added....99.9% of the time!

i have no data on what the merc computer does with its boost control strategy. But here is what I can tell you the engine is capable of doing.

for starters, given the pulley sizes the 450 runs, it makes about 11-12lbs MAX. thats with the boost valve fully closed, so no recirculation. The Motec kit does not change the pulleys, so it isnt capable of making MORE boost than what the merc ECU is capable of.

That being said, unless the merc system is significantly dumping boost to limit horsepower, its all in the TUNE.

Motec has dyno sheets showing the engine gaining 120hp with NO PULEY CHANGES.

yes, a kit for a 450 is available today. I have already tested one and the driver said the power increase was SUBSTANTIAL.

 

[hallett21]

well i just tested a 300r that had to have picked up AT LEAST 80hp to do what its doing now......close to your impossible 30%....and there aint no super charger.

Are you planning on putting the motor on a dyno?

Please don’t take my comments as negative as I think what you’re accomplishing is badass. But Nordic got more than 66mph out of those boats with 300hp. So I think you had a setup issue out of the gate for your data.

My vector with a 900 hour 250 Optimax can get 63-64mph with anchors and a cooler in the boat. And it’s a pig compared to crossfires.

 

[DaveH]

For the 300 that's making +80hp - what was the increase on the rev limiter?
Other than optimising timing and AFR (which are gonna net smaller gains...) - the only way to make that kind of power increase on motors of this size range, is to spin them faster, or for the 450 - add boost (and possibly ALSO spin it faster...which could also add more boost if the bypass valve isn't dumping it at a presribed factory limit)

Just wanted to say - i'm not doubting any of this, all I was saying regarding the Verado 450 making +120 HP is "there's gonna be a boost increase for that".
Not trying to poke holes in the performance gains, just curious how its getting there....
Inquiring minds wanna know! Spill the beans!

rev limit was set to 6400. it pulled a 29 pitch to 6100.

 

[DaveH]

Are you planning on putting the motor on a dyno?

Please don’t take my comments as negative as I think what you’re accomplishing is badass. But Nordic got more than 66mph out of those boats with 300hp. So I think you had a setup issue out of the gate for your data.

My vector with a 900 hour 250 Optimax can get 63-64mph with anchors and a cooler in the boat. And it’s a pig compared to crossfires.

i have a chassis dyno.........not a swimming pool. that said, Motec does have a dyno for these outboards, running them in water as configured. the boat tested was setup for skiing and not necessarily top speed, hence the reason we tested before putting the kit on. thats no BS......it woud ony pu the 5 blade 25 to 5800rpm....after Motec the same prop bounced the limiter at 6400 running 81mph

 

[Racey]

I dont know what they run stock, but if I knew how much boost it was already running (or what HP it made in naturally aspirated trim)- we could roughly calculate how many more PSI would be required to gain 120 horsepower.

120 horsepower has to be adding boost, that is a 27%+ increase. the only other way to pick up that kind of power would be to increase the rev limit, if it continued to make power beyond the factory rev limit to the tune of 120HP. That would be alot of RPM to net that gain.

I could be wrong, but power gains on a motor of that size doesn't come that easily unless boost is added....99.9% of the time!

I have lots of log data, it's not running very much boost to make the extra power.

The air inlet and blower speed cap that system out physically around 12psi under the best conditions. Real world is closer to 11

Rev limiters are not really raised much you reach diminishing returns as the engine runs out of airflow ability.

Are you planning on putting the motor on a dyno?

Please don’t take my comments as negative as I think what you’re accomplishing is badass. But Nordic got more than 66mph out of those boats with 300hp. So I think you had a setup issue out of the gate for your data.

My vector with a 900 hour 250 Optimax can get 63-64mph with anchors and a cooler in the boat. And it’s a pig compared to crossfires.

No setup changes were made to the boat, so regardless if the initial setup was good or bad, the engine has picked up substantial power. Tests were done back to back, same day, so no real wild card variables. If anything the merc got the better air as it was tested in the morning, motec in the afternoon.

Motec partnered with a marine group in Melbourne and built a dyno specifically to run these outboards, it's pretty wild, they have a wet sump, but they actually built the dyno in the ceiling and couple to the flywheel of the motor with a torque tube while the lower unit is submerged in a sump.

 

[DaveH]

oh and for you 496 guys.... I am working on a total system replacement. New harness, Motec M130 ECU. full open tuning capabilities. going to be engine dyno testing this soon, to get stock power output vs what can be had with a real tune. i expect some eye opening numbers. will work with all the existing sensors, ignition and so forth.

 

[hallett21]

I have lots of log data, it's not running very much boost to make the extra power.

The air inlet and blower speed cap that system out physically around 12psi under the best conditions. Real world is closer to 11

Rev limiters are not really raised much you reach diminishing returns as the engine runs out of airflow ability.


No setup changes were made to the boat, so regardless if the initial setup was good or bad, the engine has picked up substantial power. Tests were done back to back, same day, so no real wild card variables. If anything the merc got the better air as it was tested in the morning, motec in the afternoon.

Motec partnered with a marine group in Melbourne and built a dyno specifically to run these outboards, it's pretty wild, they have a wet sump, but they actually built the dyno in the ceiling and couple to the flywheel of the motor with a torque tube while the lower unit is submerged in a sump.

So if I’m reading this right 600 rpm netted 16mph?

 

[Racey]

So if I’m reading this right 600 rpm netted 16mph?

If you make the power, you can trim the boat more, which gets your slip way down. It's like getting to the top of a hill where the slope levels off.

 

[hallett21]

If you make the power, you can trim the boat more, which gets your slip way down. It's like getting to the top of a hill where the slope levels off.

And/Or someone didn’t let the stock tune boat/prop see its full potential

 

[DaveH]

So if I’m reading this right 600 rpm netted 16mph?

the 5 blade 25p would only turn 5800. after the Motec...straight to the rev limiter at 6400, at 81mph. it needs a 5 blade 27 or 28p, bet it woud run high 80's

 

[Racey]

And/Or someone didn’t let the stock tune boat/prop see its full potential

Nope, guy driving the boat was not me or Dave, he's one of the guys that races the outboard in the Enduro, He has no dog in this fight, and knows what he's doing.

Once these things start making their way into the market you will see.... There is no doubt they make SUBSTANTIAL power gains, and it's very easy to switch out for an A/B test.

It blew me and Dave's mind just how bad the factory tune is on those motors, we didn't believe it at first either.... We didn't think it was possible.

Initially this whole thing came about because of the stupid guardian mode coming on during races. Dave put an M150 on the 300r before they even had a marine software package for the ECU, we had to take the servo out of the lower unit and make an external shift arm and run it like a crash box, they ran that first variant on the automotive racing firmware. In the meantime unknown to us Motec had been developing the complete integrated firmware package in Australia, now we have migrated everything to that software so you get the shifting, smartcraft, etc etc...

 

[rrrr]

actually......yes any ecu would work. but that being said, there are many marine specific functions that have to be addressed that "typical" aftermarket ECU's dont offer.. one example would be the shift servo used by the merc OB's. or the CAN structure Merc uses.

this is where Motec has done their homework and made an easy plug and play solution, not to mention dyno tuned base maps to start from.

It's really incredible one can purchase an ECU and the proprietary knowledge of Motec for just $5,500. They have blown open the safe and are passing out horsepower that was locked away.

 

[DaveH]

It's really incredible one can purchase an ECU and the proprietary knowledge of MOTEC for just $5,500. They have blown open the safe and are passing out horsepower that was locked away.

WAY OVERDUE.

the current kits are more than that. when the new ecu is avaiable in May, i am hoping they will be UNDER 5k.

the difference is price is mainly due to the adapter harness the new ecu will not need.

 

[NeedlesRat]

This is bad ass, but shit $5500 per motor is steep for only 80HP. So if a twin engine cat needed two, your looking at $11,000 for 160 HP seems super steep. Granted, I understand the R&D that had to go into this, but any chance future prices drop?

 

[Racey]

This is bad ass, but shit $5500 per motor is steep for only 80HP. So if a twin engine cat needed two, your looking at $11,000 for 160 HP seems super steep. Granted, I understand the R&D that had to go into this, but any chance future prices drop?

Where else are you going to be able to get a 25% power gain on a 40-70k motor for only 5k...... That plugs in, works with everything, no bullshit.

 

[rrrr]

WAY OVERDUE.

the current kits are more than that. when the new ecu is avaiable in May, i am hoping they will be UNDER 5k.

the difference is price is mainly due to the adapter harness the new ecu will not need.

The ability to use the stock harness is another impressive feat. Motec engineered the new ECU to be a physically transparent one for one swap for the Merc unit. Removing the need for an adapter harness makes the installation easier, and removes the possibility of signal glitches caused by attenuation through the additional connector interfaces.

The progress by Motec in producing HP by upgraded electronics and programming is really interesting. They've been making great products for years, and this advancement looks to be another big win.

 

[n2otoofast4u]

To be fair, someone could do this with a megasquirt deal and a dyno at their disposal.

Who!? LOL.....

Honest question, are they still around? Between Motec, Fuel Tech and Holley the Megasquirt stuff has all but disappeared from what I see.

 

[hallett21]

Nope, guy driving the boat was not me or Dave, he's one of the guys that races the outboard in the Enduro, He has no dog in this fight, and knows what he's doing.

Once these things start making their way into the market you will see.... There is no doubt they make SUBSTANTIAL power gains, and it's very easy to switch out for an A/B test.

It blew me and Dave's mind just how bad the factory tune is on those motors, we didn't believe it at first either.... We didn't think it was possible.

Initially this whole thing came about because of the stupid guardian mode coming on during races. Dave put an M150 on the 300r before they even had a marine software package for the ECU, we had to take the servo out of the lower unit and make an external shift arm and run it like a crash box, they ran that first variant on the automotive racing firmware. In the meantime unknown to us Motec had been developing the complete integrated firmware package in Australia, now we have migrated everything to that software so you get the shifting, smartcraft, etc etc...

If that’s the case then hopefully they can see 90+ with these tunes.

Post 18 for 300 Optimax numbers.

21 Nordic

Anyone have any info on these. Possibly thinking of going this route this next time around. Haven’t seen many for sale.

www.riverdavesplace.com

 

[Desert Whaler]

Should I flash my Yammy Pea-Shooter ???

. . . or just stick with the NOS ???

 

[TVMNick]

On the 300R Motec calibration what fuel grade does it call for? Merc factory calibration only calls for 87 octane. With an aggressive timing profile, AFR optimization and 91 octane fuel I can totally see an 80hp gain.

Truly impressive. I hope they do the same for the 5.7L V10.

 

[HST4ME]

Hopefully they do one for the 3.4 v6

 

[NeedlesRat]

Where else are you going to be able to get a 25% power gain on a 40-70k motor for only 5k...... That plugs in, works with everything, no bullshit.

Well when you say it like that.... Im in

 

[Racey]

On the 300R Motec calibration what fuel grade does it call for? Merc factory calibration only calls for 87 octane. With an aggressive timing profile, AFR optimization and 91 octane fuel I can totally see an 80hp gain.

Truly impressive. I hope they do the same for the 5.7L V10.

V10 package will happen as well

We have already ran the new 500r packages as well. Essentially they all use the same base software.

 

[attitude]

V10 package will happen as well

We have already ran the new 500r packages as well. Essentially they all use the same base software.

Is the 500 the same motor as the 450? I forgot if this was discussed when it was released.

This is some great boating content btw.

 

[DaveH]

Is the 500 the same motor as the 450? I forgot if this was discussed when it was released.

This is some great boating content btw.

yes, same engine and supercharger. different tune.

 

[Livewire Fabworks]

If you guys need a test mule for the 520/ 540,

 

[Racey]

Is the 500 the same motor as the 450? I forgot if this was discussed when it was released.

This is some great boating content btw.

I believe the lower gear case and prop shaft are larger, stronger, powerhead is essentially the same platform

 

[DaveH]

Should I flash my Yammy Pea-Shooter ???

View attachment 1471200

. . . or just stick with the NOS ???

View attachment 1471201

i asked Motec about a replacement ECU for Yamaha. They said it wont happen as there are lots of options for reflashing the Yamaha ECU, so the need simply isnt there.

 

[HST4ME]

V10 package will happen as well

We have already ran the new 500r packages as well. Essentially they all use the same base software.

I want to hear that v12 with the proper exhaust

 

[Rayson1971]

Not sure it was brought up or if it makes a difference, but could these motors be that detuned from mercury that when you put a new motec on it, it actually brings it back to the hp it should make?

 

[Racey]

Not sure it was brought up or if it makes a difference, but could these motors be that detuned from mercury that when you put a new motec on it, it actually brings it back to the hp it should make?

No, Motec's baseline dyno data from when they reverse engineered all the systems shows them at their rate hp with the stock ecu.

That is why they, and we, have been so confident in the product after almost 2 years of use and testing in the real world

 

[counterpart7]

Any of you way smarter than me folks have a guess on what gains we could see from a 520/540 ECU. I would assume they wouldn’t be as impressive as the 25-30% increases of the OBs?

What about the 8.2L??

 

[Racey]

Any of you way smarter than me folks have a guess on what gains we could see from a 520/540 ECU. I would assume they wouldn’t be as impressive as the 25-30% increases of the OBs?

What about the 8.2L??

If i had to guess it would be more in the 10-15% range. The real benefit i see here is when it's time for the freshen up on the motor and you do a top end, cam, etc, maybe heads, the motec computer is very easy and fast to tune fuel mapping on, as their background math is phenomenal at accounting for all the environmental factors. No longer having to deal with the headache of mefiburn tuning.

This market will grow as we see more of these packages reach the 10-15 year maturity mark.

 

[Blackmagic94]

actually......yes any ecu would work. but that being said, there are many marine specific functions that have to be addressed that "typical" aftermarket ECU's dont offer.. one example would be the shift servo used by the merc OB's. or the CAN structure Merc uses.

this is where Motec has done their homework and made an easy plug and play solution, not to mention dyno tuned base maps to start from.

The power of a 8500 dollar per engine ecm package.

 

[counterpart7]

If i had to guess it would be more in the 10-15% range. The real benefit i see here is when it's time for the freshen up on the motor and you do a top end, cam, etc, maybe heads, the motec computer is very easy and fast to tune fuel mapping on, as their background math is phenomenal at accounting for all the environmental factors. No longer having to deal with the headache of mefiburn tuning.

This market will grow as we see more of these packages reach the 10-15 year maturity mark.

Seems like a no-brainer at 10-15%. 520 to 565 upgrade is $10-15k if I recall? 15% would be tickling the 600hp mark for $5k(assuming).

 

[lake p.a.l.]

Some very cool technology.
These performance gains will be ridiculous and sadly a LOT more people will get hurt or pass away due to accidents & driving their boat above their skill level. Hope I'm wrong.
Outboard single engine cats are going 120+ & twin cats 140+ with "stock" power. Guys will chase top end #s, it's what they do. Hope everyone stays as safe as possible

 

[lake p.a.l.]

This is bad ass, but shit $5500 per motor is steep for only 80HP. So if a twin engine cat needed two, your looking at $11,000 for 160 HP seems super steep. Granted, I understand the R&D that had to go into this, but any chance future prices drop?

Some guys spend $7500 per prop to gain 1-2 mph. Fairly certain $11k for 160-240hp gain is a drop in the bucket. Way outta my league but we see it almost daily.

 

[HST4ME]

Some guys spend $7500 per prop to gain 1-2 mph. Fairly certain $11k for 160-240hp gain is a drop in the bucket. Way outta my league but we see it almost daily.

I've seen guys spend that much to lose 2-3 mph

 

[DaveH]

I've seen guys spend that much to lose 2-3 mph

while everyone is fixated on hp gains and speeds......there are a slew of other benefits.

1. you will have great logging that YOU can access from your laptop.

2. want a better and more powerful display than what smart craft/vessel view offers? no problem, the ecu will work with the full line of Motec displays. Now you can configure the dash with alarms, fully programmed to your specific set points, has much better refresh rates than the 1 hz offering from the other dashes and tailor the dash display to your specific needs.

3. Have a sand car or other desert toy? unplug the ecu in the winter time when you arent using your boat and drop it in your other toy. the Marine firmware is derived from their automotive firmware, so most if not al the features needed are there to use. even better, it is possible to have multiple firmware versions on an M1 ECU. bottom line is the ECU can be used for other things than your boat.

4. want additional sensors Merc doesnt offer? no problem, there are additional inputs for sensors that you can configure as needed. on this project, fuel pressure was added.....and the 300r needs fuel pressure compensation, but merc doesnt have it. want to run e85? add a flex fuel sensor, and you are running WITHOUT any other needed changes as the M1 ECU has flex fuel capabilities native, and YES i have already tested e85 on the 300 and it does pickup power over gasoline. the injectors and fuel system have the capacity in stock form for the additional fuel needed. the Motec 300 kit adds a knock sensor right out of the box.

5. you can now test and diagnose problems yourself, without the need for any proprietary scanners. from you laptop, view all sensor and tuning data.

6. setup a driver switch to change engine parameters. example, you have your 91octane tune with agressive timing and fueling, flip a siwtch a revert to more conservative numbers for 87. or a different driver switch that limits throttle/speed when someone asks to drive the boat.

there are probably some other benefits as well, but its early and i'm not firing on all cylinders yet.

 

[HST4ME]

while everyone is fixated on hp gains and speeds......there are a slew of other benefits.

1. you will have great logging that YOU can access from your laptop.

2. want a better and more powerful display than what smart craft/vessel view offers? no problem, the ecu will work with the full line of Motec displays. Now you can configure the dash with alarms, fully programmed to your specific set points, has much better refresh rates than the 1 hz offering from the other dashes and tailor the dash display to your specific needs.

3. Have a sand car or other desert toy? unplug the ecu in the winter time when you arent using your boat and drop it in your other toy. the Marine firmware is derived from their automotive firmware, so most if not al the features needed are there to use. even better, it is possible to have multiple firmware versions on an M1 ECU. bottom line is the ECU can be used for other things than your boat.

4. want additional sensors Merc doesnt offer? no problem, there are additional inputs for sensors that you can configure as needed. on this project, fuel pressure was added.....and the 300r needs fuel pressure compensation, but merc doesnt have it. want to run e85? add a flex fuel sensor, and you are running WITHOUT any other needed changes as the M1 ECU has flex fuel capabilities native, and YES i have already tested e85 on the 300 and it does pickup power over gasoline. the injectors and fuel system have the capacity in stock form for the additional fuel needed. the Motec 300 kit adds a knock sensor right out of the box.

5. you can now test and diagnose problems yourself, without the need for any proprietary scanners. from you laptop, view all sensor and tuning data.

6. setup a driver switch to change engine parameters. example, you have your 91octane tune with agressive timing and fueling, flip a siwtch a revert to more conservative numbers for 87. or a different driver switch that limits throttle/speed when someone asks to drive the boat.

there are probably some other benefits as well, but its early and i'm not firing on all cylinders yet.

#5 is a big deal to avoid shitty dealerships and half assed part cannon techs.

 

[Bigbore500r]

I have lots of log data, it's not running very much boost to make the extra power.

The air inlet and blower speed cap that system out physically around 12psi under the best conditions. Real world is closer to 11

Rev limiters are not really raised much you reach diminishing returns as the engine runs out of airflow ability.


No setup changes were made to the boat, so regardless if the initial setup was good or bad, the engine has picked up substantial power. Tests were done back to back, same day, so no real wild card variables. If anything the merc got the better air as it was tested in the morning, motec in the afternoon.

Motec partnered with a marine group in Melbourne and built a dyno specifically to run these outboards, it's pretty wild, they have a wet sump, but they actually built the dyno in the ceiling and couple to the flywheel of the motor with a torque tube while the lower unit is submerged in a sump.

I'd love to see what they are tweaking if you have the logs of stock VS tuned.
Till then, in true RDP fashion, I will speculate the following theories without having actual data -

Theory 1 -
The motors have timing bumped slightly, AFR optimized slightly (probably leaner) , and rev limiter increased to let it run out on top if the power caries beyond the stock rev limit. In the case of the 450r, it could benefit from the blower spinning that increased RPM upstairs and make a bit more boost, as long as the bypass valve isn't opened to bleed any off.

Theory 2 (possibly employed in conjunction with theory #1...)
If Merc employs some sort of torque / power management that controls an electronic throttle body, that would be the only other way it could be limiting HP and net such drastic gains via tune, without simply making the power upstairs beyond the stock rev limiter (and letting the 450r make more boost by spinning faster and raising the boost relief threshold of the bypass valve). If Merc is commanding the throttle angle to max out below actual WOT in certian scenarios, that would effictively make it act as a restrictor plate. Removing this restriction would also net more boost (more airflow potential beyond where the throttlebody would become the limiting factor in air movement). Do they do this?

Theory 3
That Electronautical dude is a consultant to MOTEC - he hooked it up to MEFI IV and let it self-optimize without any of those pesky lookup tables limiting HP. Motec runs MEFI IV behind the scenes

 

[Bigbore500r]

while everyone is fixated on hp gains and speeds......there are a slew of other benefits.

1. you will have great logging that YOU can access from your laptop.

2. want a better and more powerful display than what smart craft/vessel view offers? no problem, the ecu will work with the full line of Motec displays. Now you can configure the dash with alarms, fully programmed to your specific set points, has much better refresh rates than the 1 hz offering from the other dashes and tailor the dash display to your specific needs.

3. Have a sand car or other desert toy? unplug the ecu in the winter time when you arent using your boat and drop it in your other toy. the Marine firmware is derived from their automotive firmware, so most if not al the features needed are there to use. even better, it is possible to have multiple firmware versions on an M1 ECU. bottom line is the ECU can be used for other things than your boat.

4. want additional sensors Merc doesnt offer? no problem, there are additional inputs for sensors that you can configure as needed. on this project, fuel pressure was added.....and the 300r needs fuel pressure compensation, but merc doesnt have it. want to run e85? add a flex fuel sensor, and you are running WITHOUT any other needed changes as the M1 ECU has flex fuel capabilities native, and YES i have already tested e85 on the 300 and it does pickup power over gasoline. the injectors and fuel system have the capacity in stock form for the additional fuel needed. the Motec 300 kit adds a knock sensor right out of the box.

5. you can now test and diagnose problems yourself, without the need for any proprietary scanners. from you laptop, view all sensor and tuning data.

6. setup a driver switch to change engine parameters. example, you have your 91octane tune with agressive timing and fueling, flip a siwtch a revert to more conservative numbers for 87. or a different driver switch that limits throttle/speed when someone asks to drive the boat.

there are probably some other benefits as well, but its early and i'm not firing on all cylinders yet.

These are huge benefits, and the price point for this to be "plug and play" with the merc harness / system is really good.

Question - does the Motec incorperate any "self learn" options / tables with an integrated wideband option?
These are a double edged sword in the hands of consumers, but can be handy when properly used

 

[DaveH]

These are huge benefits, and the price point for this to be "plug and play" with the merc harness / system is really good.

Question - does the Motec incorperate any "self learn" options / tables with an integrated wideband option?
These are a double edged sword in the hands of consumers, but can be handy when properly used

Motec does have closed loop. THIS IS NOT SELF TUNE. its there to compensate for small differences of target air/fuel ratio's (lambda) vs desired (tuned) lambda values. you have full control of when it kicks it (based off manifold pressures, engine speed and coolant temps) AND what authority level (both over rich or over lean) in percentage of fuel trim.

to some this may sound complicated, but the reality is Motec is one of the easiest ECU's to get the fueling correct. This is due to the ECU have mathematical algorithms where the ECU KNOWS what injector, engine displacement, fuel and manifold pressure and other factors and calculates base fueling requirements. the fueling VE table is really just corrections to the background math that drives the fueling. even better, Motec has already done dyno tuning and provides a base fuel map that needs very little adjustment. On the 450 I setup, i did NOT touch the fueling and ran it right off the Motec base tune........

 

[Bigbore500r]

Motec does have closed loop. THIS IS NOT SELF TUNE. its there to compensate for small differences of target air/fuel ratio's (lambda) vs desired (tuned) lambda values. you have full control of when it kicks it (based off manifold pressures, engine speed and coolant temps) AND what authority level (both over rich or over lean) in percentage of fuel trim.

to some this may sound complicated, but the reality is Motec is one of the easiest ECU's to get the fueling correct. This is due to the ECU have mathematical algorithms where the ECU KNOWS what injector, engine displacement, fuel and manifold pressure and other factors and calculates base fueling requirements. the fueling VE table is really just corrections to the background math that drives the fueling. even better, Motec has already done dyno tuning and provides a base fuel map that needs very little adjustment. On the 450 I setup, i did NOT touch the fueling and ran it right off the Motec base tune........

Gotcha. I understand closed loop VS "self tuning", was just curious