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Question, how long should a n/a 1000 hp big block last in a trophy truck

Bajastu

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If you’re getting catastrophic failures, either you have an oil control problem or a build problem (parts or materials prep) such as incorrect valve train setup or your oil clearances need to be larger.
You hit it on the nose. I’d be switching builders. Unfortunately if the builder is a marine engine builder, he better understand the difference between marine and off road engine builds. The two engines are for completely different purposes, demands, and conditions.
 

monkeyswrench

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Whos looking at the logs?
This is an interesting thing too. I'm old school and poor. I've only messed with a little of the nicer efi stuff. Just like an engine needs to be built for the specific demands, so does the tune. I've witnessed guys thinking "I have a laptop, I can tune." (Just because someone has a SnapOn toolbox doesn't mean they know the tools.) I'd assume parameters for an offroad rig would be much different than boats and drag cars. Fuel and timing curves make big differences...and even big bangs.
 

rivrrts429

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Motor would get torn down every 500+ race. There’s a reason thousands of dollars are spent on the air filtration system alone. It’s breathing shit air for hours. Oil system as well.

Data loggers are critical. If the driver is bouncing off the chip routinely the logger will tell a story like late braking and spicy exits when driving.

If the driver isn’t good at two foot driving they tend to ring the motors neck.

So many variables it’s hard to know without more data and motor builder notes.
 

TPC

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One of my clients Sons races Troohy Spec class. It seems that they are always breaking shit. I cant even imagine the money soent, but its all a tax write off for them.
Friend Igor builds them and claims on preparation alone "it's $35.000 to get it off the trailer race ready, each race."

iWApNHx.jpg


Igor in action recorded on a Barbie phone:

 
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MARCYTECH

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Friend Igor builds them and claims on prep alone "it's $35.000 to get it off the trailer race ready."

iWApNHx.jpg

Igor in action:
Truth!that’s absolutely what it costs to prep a car for each race. Sometimes more some times a little less. A engine should last you quite a while but accessories on it and heads should be treated as wear items imo. The rest of the car needs to be prepped and inspected after every race. All pivot bearings replaced, all suspension sent off to be checked for cracks, rear gear, all hubs, axles, drive line, trans every couple races blah blah blah.
Also not many guys pushin 1000 so not a lot to compare yo
I think Loren Healey is like 850 crank on a jgre engine. That’s like 500 tire hp after drivetrain loss.
 

lbhsbz

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Back in my road racing and BBC boat days, I used to build all my own stuff. I learned that there are a whole lot of machinists and engine builders out there that haven’t a clue as to what they’re doing. It was not uncommon to have 3 blocks machined before I was happy with machine work….the first 2 got scrapped. The only shop I found that understood how to do a proper valve job was a garage operation in Canada with a 2 year backlog….i got about 1/2 way tooled up to do them myself before I gave up and switched to an outboard boat using $600 v6 mercs off of Craigslist because I was over it.

I’d be hunting down whoever does the engines for the guys that finish, or go back to sealed new LS3s.

I also wouldn’t have got to 4 engine failures before I made this switch
 

baja-chris

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Long ago I bought a transmission and torque converter out of the Simon and Simon TT (from Culhane) to use in my 8 truck. The stall speed was 4000.
Don't know about present day 1000+ hp big blocks but I would not be surprised if they live north of 4000 the whole race.
Even with this, just because it can safely pull to 8200, does not mean it needs to go there constantly to win the race. I'll bet Rob Mac shifts well below redline on long races.
 

COCA COLA COWBOY

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Yes catastrophic failures dropped valves, spun bearings and more. Also this isn’t just one time we are on 4 DNF in a row due to motors I believe.

Correct redline is 8200 and it gets there. Driver is not crazy hard on equipment this is a privateer in TT so replacing motors is not in his racing budget

motor comes out every race for full chassis inspection and tranny service

no
I'm just glad it's not Gary!

Spun bearings...bad builder. I'm not an expert, but I have learned that you have to have the right builder for the type or racing your doing. Different racing has different tolerances because of metal expansion and contraction. If an engine is one getting full throttle for 5 seconds before being torn down, it's going to be different compared to an engine that is seeing 1000 miles. I'd go with an engine builder that does nascar or distance type racing and even that most likely would be different than the tortures of off-load.

On a side note, I have a buddy that built a Hendrick Nascar engine for his dragster. Why, 900Hp and he can just run it over and over without the same issues of a typical engine. Those Nascar engines are so different on the inside....parts are crazy expensive though.
 

77charger

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Depends on many factors but should atleast get through a race. I’m sure ones like that should be torn down inspected to see wear points to establish a schedule.

But shouldn’t be having major issues like you are saying. Seen a few 1000hp engines in jet boat or flats that seem to hold up well.
 

Dana757

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I’d be sending that engine over to Mike Porter at Redline. People thought I was crazy for using an off road builder for my blown gas engine. Thing ran great for years. Then I sent it up to Grose as a base to build the blown alcohol deal. Joey had nothing but praise for the previous builder.
 

Outdrive1

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It’s scary to think a needle bearing lifter can fail and wipe out an entire engine. When I bought Eye of the Tiger, Carson warned me that motor had needle bearing lifters and that I needed to change them out. Once he said that to me that’s all I could think about. I felt like I was driving a time bomb.
 

bonesfab

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It’s scary to think a needle bearing lifter can fail and wipe out an entire engine. When I bought Eye of the Tiger, Carson warned me that motor had needle bearing lifters and that I needed to change them out. Once he said that to me that’s all I could think about. I felt like I was driving a time bomb.
The newer lifters arent as bad as they have forced oiling to the bearings. The old roller lifters relied on splash lube and we all know boats idle a lot and that doesn't help the situation.
 

wallnutz

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I’d be sending that engine over to Mike Porter at Redline. People thought I was crazy for using an off road builder for my blown gas engine. Thing ran great for years. Then I sent it up to Grose as a base to build the blown alcohol deal. Joey had nothing but praise for the previous builder.
Mike builds more than just off road motors these days.
As always you pay for the best.
 

rivrrts429

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Long ago I bought a transmission and torque converter out of the Simon and Simon TT (from Culhane) to use in my 8 truck. The stall speed was 4000.
Don't know about present day 1000+ hp big blocks but I would not be surprised if they live north of 4000 the whole race.
Even with this, just because it can safely pull to 8200, does not mean it needs to go there constantly to win the race. I'll bet Rob Mac shifts well below redline on long races.


Drivers that chicken foot (stab off/on throttle) don’t usually finish. Rob Mac drives like he has an egg between his foot and skinny pedal.

Doesn’t matter if you’re the fastest but can’t finish.
 
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rivrrts429

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I’d be sending that engine over to Mike Porter at Redline. People thought I was crazy for using an off road builder for my blown gas engine. Thing ran great for years. Then I sent it up to Grose as a base to build the blown alcohol deal. Joey had nothing but praise for the previous builder.


Porter owns one of the rowdiest jet boats on the entire river. His Placecraft is unreal.
 

Bigbore500r

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How long should a 1000+ hp big block in a TT last? How many miles, races, seasons?

This is all assuming that this is a high hp race motor that is meticulously maintained with complete fluid flushed and top end inspections.

These motors are typically 60k or more so how long would you expect it to last?
Theres so much that goes into deciphering "what is killing a motor". It's like a chain made from 100 different links - your only as strong as your weakest link, and any link can break the connection. It really is a team effort, and it takes somebody with acute diagnostic ability to review failures and track down the contributing factor(s).
You've got to ensure all parties involved are on the same page and work cohesively.

It's also takes alot of effort, time, money and failure analysis to develop an unknown engine combo to withstand 1000 mile race conditions, making 1000 naturaly aspirated HP. If your builder / tuner hasn't succcessfully chosen components and had his combo stay together for these races previously, there's a high chance you are the guinnea pig, or he may be out of his wheelhouse.

COMPONENTS
-Mfg defects (identifying when this is the case, VS the items below)
-Over stressed / not rated for application
-incompatibility with other interfacing components
-life cycle / duty cycle - pushed beyond TTO to point of failure
-Is the builder specifying the correct parts for the application, and ensuring compatibility
-Is the proper oiling system in place to maintain and control oil pressure thru the entire range of operation and length of race. Wet sump - is the pickup height correct, and positively secured from moving or jarring loose during racing? Is the oil pan baffled sufficiently to control windage and maintain oil supply? If dry sump - is the oil feed / return system correctly specified and sized?

MACHINING / CLEARANCES / ASSEMBLY
- Are the proper tolerances / clearances being provided for the respective parts and application / use
- Is the quality of machine work able to achieve specific tolerances required for the application
- Is the builder specifying the correct clearances for the selected parts
- Is the building checking all required clearances and able to identify and correct when out of spec
- Is the assembly process overlooking something?
- Cleanliness / removal / prevention of all dirt, debris or shavings from machining, thru assembly to final product
- Oil supply - is the pickup height correct? Has the proper oil fill level been identified?

INSTALLATION
- Is the motor being supplied with the correct oiling connection / feed and return lines / oil tank size
- Is fuel system adequate to maintain required pressure and volume under all conditions?
- Cooling - Adequate under race conditions? Are there localized heat issues due to distribution of cooling water that may need to be addressed for this engine under sustained race conditions?
- Is the torque converter / trans setup loading the thrust bearing execcessively causing bearing wear or failure?
- Is the exhaust system placing 02 sensors in the correct location for proper feedback and tuning (also - exhaust leaks upstream affect 02 readings)
- Is the proper oil being used in regard to viscocity, durability, and is it being filled to the proper level (or volume - dry sump)

TUNING
- Is the motor tuned properly, and is sufficient safety margin or preventitive controls present in regard to AFR and Spark Advance when engine temperature or intake air tempurature exceeds normal levels (preventing detonation / lean burn failures)
- Is rev limiter set to appropriate cutoff level.
- Is rev limiter causing potential engine damage due to method of RPM limiting / frequency of encountering rev limiter during operation
- Datalogging - being used, and is it being reviewed to see if engine is encountering conditions or ranges outside of normal operation contribuiting to failure?

- OPERATOR
------THE BIGGEST VARIABLE OF THEM ALL . . . . .
 

Cole Trickle

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Best way to make a fortune in offroad racing...Start with a gigantic fortune and watch it dwindle away...lol

I have never understood the Trophy truck program the dollars just don't make sense. seems like you could have a lot of fun in a new Pro R based program and save millions.
 

Bigbore500r

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Best way to make a fortune in offroad racing...Start with a gigantic fortune and watch it dwindle away...lol

I have never understood the Trophy truck program the dollars just don't make sense. seems like you could have a lot of fun in a new Pro R based program and save millions.
Because
Trophy truck > Pro R
 

bonesfab

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Best way to make a fortune in offroad racing...Start with a gigantic fortune and watch it dwindle away...lol

I have never understood the Trophy truck program the dollars just don't make sense. seems like you could have a lot of fun in a new Pro R based program and save millions.
Bigger, better, faster and probably safer. You know car people aren't real smart with there money.
 

Bigbore500r

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They're not far off anymore!


As impressive as that is - that clip is only 13 seconds long, and the Trophy truck puts a 3+second gap on the SxS from entering frame to dissapearing from frame :cool:.
Which makes sense, as the top finishing UTV was 5 hours behind the top finishing TT in last years 1000.

That course section has the UTV maxed out and bouncing like a pogo stick, the TT is settled and prepared to take on a bigger hit .

The UTV's have come so far and are amazing, but theres no comparison to a wide open Trophy Truck

Trophy truck in-cab footage - 133mph :oops:
 
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SeanRitchie

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Kevin Kroyer said in a podcast that they recorded a 1700 RPM drop in the driveline going through the whoops in San Felipe every time the tires unloaded then hit the next whoop.

Think about that shock load going though the trans and into the back of the motor.

There is a reason whey there are only a few off-road engine builders that can make a TT engine last.

I've worked side by side with Kevin Kroyer and his team at various races. I have the utmost respect for their trade craft.
 

rivrrts429

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As impressive as that is - that clip is only 13 seconds long, and the Trophy truck puts a 3+second gap on the SxS from entering frame to dissapearing from frame :cool:.
Which makes sense, as the top finishing UTV was 5 hours behind the top finishing TT in last years 1000.

That course section has the UTV maxed out and bouncing like a pogo stick, the TT is settled and prepared to take on a bigger hit .

The UTV's have come so far and are amazing, but theres no comparison to a wide open Trophy Truck

Trophy truck in-cab footage - 133mph :oops:


The role reverses as soon as the TT gets into technical. They’re school buses in the tight stuff. I’ve never nerfed more school buses and been on the horn more than when the track gets challenging lol
 

Your ad here

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What is breaking on the engine or engines? New block every time or same block rebuilt?
 

Cole Trickle

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As impressive as that is - that clip is only 13 seconds long, and the Trophy truck puts a 3+second gap on the SxS from entering frame to dissapearing from frame :cool:.
Which makes sense, as the top finishing UTV was 5 hours behind the top finishing TT in last years 1000.

That course section has the UTV maxed out and bouncing like a pogo stick, the TT is settled and prepared to take on a bigger hit .

The UTV's have come so far and are amazing, but theres no comparison to a wide open Trophy Truck

Trophy truck in-cab footage - 133mph :oops:
If i' can have 80% of the fun for 10% of the cost sign me up...lol
 

monkeyswrench

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TT vs SxS? Kind of like comparing a CP with an outboard to a Cigarette. Both are fun, and both have strengths the the other doesn't. As kind of a motorhead, the TT is my hands down favorite. Sure, you can here a SxS approaching your favorite road crossing, but you feel that TT.

Is it financially prudent? F' no, it's racing. Not a lot of smart investments start with race gas. Women, booze, drugs or race fuel...pick your poison ;)
 

gqchris

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Friend Igor builds them and claims on preparation alone "it's $35.000 to get it off the trailer race ready, each race."

iWApNHx.jpg


Igor in action recorded on a Barbie phone:

That is almost exactly the number they told me as well!
 

ArizonaKevin

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The role reverses as soon as the TT gets into technical. They’re school buses in the tight stuff. I’ve never nerfed more school buses and been on the horn more than when the track gets challenging lol

Off topic but curious, are these the guys in the back of the TT spec field/TT legends or contending TT teams? Some of the in-car footage of the top TT guys still seem scary fast to me going over Mike's.

Have also heard that the guys at the back of the TT fields can be the hardest to pass. Doesn't matter that you've made up an hour of time on them and undoubtedly are faster overall, they can flex their right toe on a wide open section and say bye bye
 

NIKAL

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Kevin Kroyer said in a podcast that they recorded a 1700 RPM drop in the driveline going through the whoops in San Felipe every time the tires unloaded then hit the next whoop.

Think about that shock load going though the trans and into the back of the motor.

There is a reason whey there are only a few off-road engine builders that can make a TT engine last.

I've worked side by side with Kevin Kroyer and his team at various races. I have the utmost respect for their trade craft.
1000%!! We learned allot of this back in the Jimco Xtrac days. The guys at Xtrac’s could not wrap their head around the data they were capturing and shock load was the biggest one. In one case the harmonic balancer on the crank sheared two key ways as the shock load coming back through the driveline to the crankshaft was insane. This is what convinced Julson we needed a torque converter. Ultimately as I’m sure Sean knows, Jimco had to go a different direction as they were about selling cars not transmissions, and the Xtrac trans was not showcasing or selling the Jimco TT.

Not dogging boat engine builders, as they do their thing well. They just don’t know what a desert vehicle is doing, and a boat engine is no where near where the desert race engine is. If it took Joe Gibbs a few seasons & teams to figure out the off road stuff, and they are building dozens of NASCAR motors a week. With shit tons of technology & money behind them. Then how is some boat guy going to build a competitive TT engine?


@Bpracing1127 you should probably suggest to your friend that trying to save some money and letting someone who does not have a proven track record building desert race engines is not going to work. Time to pony up and get a reputable proven builder working with him. How much has he spent DNF each race? I bet way more then it’s going to cost to get a real builder. Either that or move to TT spec where it’s not going to as much.
 
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77charger

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I’d be sending that engine over to Mike Porter at Redline. People thought I was crazy for using an off road builder for my blown gas engine. Thing ran great for years. Then I sent it up to Grose as a base to build the blown alcohol deal. Joey had nothing but praise for the previous builder.
If it impressed Joey you know it’s good. Mike miller also builds a nice engine.

Our grose built 470 ran pretty good in the flat. Ran up to 9k rpm.
 

rivrrts429

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Off topic but curious, are these the guys in the back of the TT spec field/TT legends or contending TT teams? Some of the in-car footage of the top TT guys still seem scary fast to me going over Mike's.

Have also heard that the guys at the back of the TT fields can be the hardest to pass. Doesn't matter that you've made up an hour of time on them and undoubtedly are faster overall, they can flex their right toe on a wide open section and say bye bye


For the most part they are. Broken shock, bad driveline, bent a-arm etc…

It doesn’t take much and those trucks are limping. They’re so fast that when they hit something it’s almost catastrophic. Even the trucks that are still together I can catch in the mountainous terrain. They’re amazing but it’s a heavy responsibility driving one.

It’s only a matter of time until UTV’s win an overall. I imagine in the next five years you’ll see a Can-Am or Polaris win an overall.
 

sdpm

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If it impressed Joey you know it’s good. Mike miller also builds a nice engine.

Our grose built 470 ran pretty good in the flat. Ran up to 9k rpm.
My hydro with a Glen Self built engine ran pretty darn good too. Made amazing power way up in the rpm’s. Shift at 9200 rpm. When he was a little late on the shifts, broke valve springs every time. We were the only boat with a 3 speed. I’m sure you remember it. We ran you a few times. 😉
 

Bajastu

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For the most part they are. Broken shock, bad driveline, bent a-arm etc…

It doesn’t take much and those trucks are limping. They’re so fast that when they hit something it’s almost catastrophic. Even the trucks that are still together I can catch in the mountainous terrain. They’re amazing but it’s a heavy responsibility driving one.

It’s only a matter of time until UTV’s win an overall. I imagine in the next five years you’ll see a Can-Am or Polaris win an overall.
Blasphemy ! I hope to never see a golf cart on the podium ahead of a TT. At the same time, that Can-am or Polaris isn't a SXS anymore, it's a tube chassis that appears to be a SXS. That’s the only way a “SXS” can be at the upper level of off road motorsports.
 

ArizonaKevin

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For the most part they are. Broken shock, bad driveline, bent a-arm etc…

It doesn’t take much and those trucks are limping. They’re so fast that when they hit something it’s almost catastrophic. Even the trucks that are still together I can catch in the mountainous terrain. They’re amazing but it’s a heavy responsibility driving one.

It’s only a matter of time until UTV’s win an overall. I imagine in the next five years you’ll see a Can-Am or Polaris win an overall.

That's quite the prediction. I'm with you on a UTV finishing ahead of the fastest 2WD TT on the right course in the next 5 years, but candidly I would be surprised if a UTV beats one of the Mason AWD monsters.

If SCORE let Rhys Millen enter his Jackal Chassis into the UTV category that would get really interesting
 

TPayne

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For the most part they are. Broken shock, bad driveline, bent a-arm etc…

It doesn’t take much and those trucks are limping. They’re so fast that when they hit something it’s almost catastrophic. Even the trucks that are still together I can catch in the mountainous terrain. They’re amazing but it’s a heavy responsibility driving one.

It’s only a matter of time until UTV’s win an overall. I imagine in the next five years you’ll see a Can-Am or Polaris win an overall.
While I agree this will probably happen at a race in the States, i thought we might see a UTV crack top 5 at V2R, it will not happen at a Score race anytime soon, if ever. While the UTVs may be faster in certain areas of the race, it's going to be hard to beat the trucks at pushing 150 and can smash 30 mile whoop sections at a dollar +.
 

SeanRitchie

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Keep in mind that the UTV's have to start behind the Trophy Trucks, Spec TT, Class 1, Class 10. There are usually 75-100 vehicles in front of them when they leave the line. They have been starting to regularly knock on the door for top 10 overall (time), having to fight their way through all of that traffic while the lead trucks have mostly clean course and air.

A UTV overall win (on time) is not that far fetched with the talent pool in the UTV classes these days.
 

hallett21

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Sounds like the question should be….

“How much does it cost to build a bullet proof trophy truck motor?”

Or

“What’s the cheapest trophy truck motor that will stay together for one race?”
 

rivrrts429

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While I agree this will probably happen at a race in the States, i thought we might see a UTV crack top 5 at V2R, it will not happen at a Score race anytime soon, if ever. While the UTVs may be faster in certain areas of the race, it's going to be hard to beat the trucks at pushing 150 and can smash 30 mile whoop sections at a dollar +.


You’re not wrong. The fact they’re nipping at the heals is pretty cool. The next few years will be interesting. I think a UTV could take the overall.
 
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77charger

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My hydro with a Glen Self built engine ran pretty darn good too. Made amazing power way up in the rpm’s. Shift at 9200 rpm. When he was a little late on the shifts, broke valve springs every time. We were the only boat with a 3 speed. I’m sure you remember it. We ran you a few times. 😉
Yeh I think I had one of my best passes against yours at chowchilla. I had to let off to save index but I was in the 4.30s to 1/8 and my mph was upper 120s. Although my trap speed was 125 and 7.96 et. It was on a mid 7.70 range run had I stayed in it

It was the quickest and fastest to the 1/8th pass I had. Sd we had a 7.82.
 
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