All new 540 build

[obnoxious001]

I have just started planning a tall deck 540 build using a brand new Brodix block that was purchased for another customer, and plans changed. I don't have a new crank for it, so that might be changed if someone wanted longer or shorter stroke, but I do have some 6.8" Molnar "power adder" rods that would hold up well to a forced induction build.

The block has already been machined and is in my hands, so that's one hurdle that's already been jumped. If no one currently has the need or interest, I will make a couple of decisions and either build a short block or a complete engine to keep here for sale in case someone needs a quick replacement.

 

[Bugginout]

How much for the block

 

[Bugginout]

I am interested

 

[mattyc]

I have just started planning a tall deck 540 build using a brand new Brodix block that was purchased for another customer, and plans changed. I don't have a new crank for it, so that might be changed if someone wanted longer or shorter stroke, but I do have some 6.8" Molnar "power adder" rods that would hold up well to a forced induction build.

The block has already been machined and is in my hands, so that's one hurdle that's already been jumped. If no one currently has the need or interest, I will make a couple of decisions and either build a short block or a complete engine to keep here for sale in case someone needs a quick replacement.

Barry, why use a tall deck for a 540? Benefits to using the longer rod?

 

[obnoxious001]

Barry, why use a tall deck for a 540? Benefits to using the longer rod?

Yes, it's almost more like why not to use a 9.8 deck for a 540. The longer rod in the tall deck yields a more favorable rod angle, so the rings seal better and should last longer.

 

[JJ McClure]

Barry. Could I talk to you for a bit about troubleshooting my dads ole 468bbc?

 

[Jake141]

540 with a 3.3 whipple maybe?

 

[obnoxious001]

540 with a 3.3 whipple maybe?

Not a bad idea but it would bump the final cost of the engine up quite a bit. It's too bad that the dyno I like to use is so far away from here too.

 

[n2otoofast4u]

Barry I am going to send you a PM. I am scratching my head right now on a deal.

 

[Dcb.blake]

Can’t beat the quad rotor look with the big intake going through the middle imo

 

[obnoxious001]

Can’t beat the quad rotor look with the big intake going through the middle imo

If you want to buy the Whipple setup, I will build it for you!

 

[obnoxious001]

I could incorporate these parts into a build, super nice intake and Jesel belt drive polished and clear coated.

 

[Jonas Grumby]

Can’t beat the quad rotor look with the big intake going through the middle imo

 

[Jake141]

I have a 3.3 whipple that I want to use on a new engine. Not sure who’s building said engine yet… I’d like to around 850hp turning 6k rpm

 

[obnoxious001]

I have a 3.3 whipple that I want to use on a new engine. Not sure who’s building said engine yet… I’d like to around 850hp turning 6k rpm

That should be realistic. I built a 516 cu in with a 3.3 in 2009 that is still running 120 mph plus in a Stoker. @stokerwhore

 

[stokerwhore]

2013
Tried to find pics of it on the stand in 2009 but i think those are on "my space" lol. that's a long time ago. There was also a thread on performance boats. not sure that's around anymore either.

 

[Jake141]

2013
Tried to find pics of it on the stand in 2009 but i think those are on "my space" lol. that's a long time ago. There was also a thread on performance boats. not sure that's around anymore either.

That’s awesome, I see a lot of outboard stokers, it’s cool to see one with a blower motor in it

 

[Jake141]

That should be realistic. I built a 516 cu in with a 3.3 in 2009 that is still running 120 mph plus in a Stoker. @stokerwhore

120mph would basically be the goal for me, in my 26 daytona.. 800hp and 1.35 gears should work and put it right at 121 at 6k rpm

 

[connollyed]

This....with twin turbos in a connolly would be pretty trick. Most guys we with connolys run blowers.
1000hp capable,?

 

[obnoxious001]

This....with twin turbos in a connolly would be pretty trick. Most guys we with connolys run blowers.
1000hp capable,?

I have done a few twin turbo engines. I actually worked for Gale Banks in the late 70's, but with a Gentry turbo setup on a 540 I have had a couple that ran on the dyno at 1050 and 1075 hp on pump gas, and they stay together. It would be my choice if I was building for myself.

 

[obnoxious001]

That’s awesome, I see a lot of outboard stokers, it’s cool to see one with a blower motor in it

Yep, that's the one I built for my buddy Jason, runs fast, no engine issues for all those years! I actually had a blower belt guard made to protect back seat passengers, but he didn't ever get it mounted.

 

[Dcb.blake]

View attachment 1212245

2 blowers is better than 1🫡

 

[Dcb.blake]

Turbos…..the best way to add some air and party…. Most people can’t handle/understand how a turbo works and use the power to advantage..let’s start a THREAD

 

[Jonas Grumby]

2 blowers is better than 1🫡

well, probably not, but they look cool, and fit with my old fart theme.

 

[sintax]

Turbos…..the best way to add some air and party…. Most people can’t handle/understand how a turbo works and use the power to advantage..let’s start a THREAD

The biggest issue with marine turbo systems is there’s really only one name in the game. Carson has the full market share, and unfortunately you better come with a fat wallet and a large time frame to get your setup in hand.

I wish some other guys made a similar product, but clearly it’s a niche market.

Slapping an 871/1071 on a stout bottom end is just cheaper and easier from a ringing perspective. Once you get the turbine maps sorted for your setup, modern turbos are actually pretty simple to tune.

If all things were equal, I’m sure more people would go the turbo route.

I would love any and more tech threads though, I’m always hungry to learn.

 

[obnoxious001]

OK, no one is jumping up and down interested in buying it, I may just go ahead and build a really nice jet boat engine, single Dominator with that Jesel belt drive!

 

[Runs2rch]

OK, no one is jumping up and down interested in buying it, I may just go ahead and build a really nice jet boat engine, single Dominator with that Jesel belt drive!

Wish I had a boat for it.

 

[farmo83]

The biggest issue with marine turbo systems is there’s really only one name in the game. Carson has the full market share, and unfortunately you better come with a fat wallet and a large time frame to get your setup in hand.

I wish some other guys made a similar product, but clearly it’s a niche market.

Slapping an 871/1071 on a stout bottom end is just cheaper and easier from a ringing perspective. Once you get the turbine maps sorted for your setup, modern turbos are actually pretty simple to tune.

If all things were equal, I’m sure more people would go the turbo route.

I would love any and more tech threads though, I’m always hungry to learn.

Mercury runs turbos on all their big stuff now.

As far as seat of your pants feel in a boat I would love to see info on how turbos stack up against Whipples and other screw blowers.

 

[sintax]

Mercury runs turbos on all their big stuff now.

As far as seat of your pants feel in a boat I would love to see info on how turbos stack up against Whipples and other screw blowers.

yup!

I'm unsure about what hardware they run, but i'd suspect they designed their own hardware to their needs and someone is making the kits for them.

as far as seat of the pants, i've been in a few of each, and nothing beats a blown + injected setup, story over

 

[Teague_JR]

Mercury runs turbos on all their big stuff now.

As far as seat of your pants feel in a boat I would love to see info on how turbos stack up against Whipples and other screw blowers.

Whipple's have better throttle response. The blade opens and boom horsepower, blade closes and you have instant engine braking. Whipples make a nice flat-ish boost curve and torque curve and will pull horsepower and RPM until the engine runs out of volumetric efficiency of heads and cam, so better top end power potential and more RPM headroom for smaller gears.

Turbos can be easily electronic wastegated for digital boost control, so you can run an inverted boost curve and make MASSIVE bottom and mid range torque. Tons of boost down low where the engine is less prone to detonate, taper it off up top. Turbos take half a second or so to spool and unspool but with modern tuning the lag is a lot less pronounced, but it is still there. Pump Gas Turbo big blocks tend to be done with HP at 6500 or so while having turbos that are big enough to make power but small enough to be drivable.

For example, a pump gas big block making 1300 hp:

Screw compressor: 1300 hp at 7000 rpm, 1200 lb/ft at 4500 rpm
turbo: 1300 hp at 6300 rpm, 1450 lb/ft at 3000-4000 rpm

Its been proven in every kind of racing that turbos will beat blowers around a course. The massive torque exiting corners is a huge advantage. I enjoy the benefits of either setup. Snappy motors are fun to throttle. Forced induction horsepower is fun no matter what.

 

[connollyed]

OK, no one is jumping up and down interested in buying it, I may just go ahead and build a really nice jet boat engine, single Dominator with that Jesel belt drive!

If I hadn't put a chunk down for getting the interior done, I would've been all over it.

 

[obnoxious001]

How much for the block

Only way I would consider selling the block is if the 6.8" rods sold with it since they would not work with any of the standard deck blocks I have here.

 

[crzy2bealive]

Only way I would consider selling the block is if the 6.8" rods sold with it since they would not work with any of the standard deck blocks I have here.

PM sent

 

[Oliver1421]

would you sell that intake manifold?

 

[obnoxious001]

would you sell that intake manifold?

I am working on a tentative deal to build a blower engine, so at that point the manifold could be sold separately.

 

[Oliver1421]

I am working on a tentative deal to build a blower engine, so at that point the manifold could be sold separately.

Let me know when u figure it out.
Thanks!