Lets say you were to destroke the motor. They say that it will help in higher RPM's and really take advantage of the turbo its self. Are there any advantages of doing this? Has anyone ever done this?

 

I don't know about the ls1, But I have a friend that is doing it to his turbo 03 cobra this winter. You would need some killer vlavetrain upgrades. its at least a woth a look into.

 

ya, im not 100% how they work. i think it might just work better with mustang motor because they have 2-4 valves per cylinder correct? Maybe thats why you never hear of anyone doing that on ls1's...

 

dunno bout the ls1 but Hot Rod mag de-stroked a LT1 down to 302 back in 1997. It was an N/A setup though

 

wouldnt that be pointless in an NA setup though?

 

i would think an improperly sized turbo would be the only reason to destroke your motor or if you was in a racing class where only so many cubes is allowed.the extra rpm would be a factor also.

 

Harlan spun his 347 (stock block/crank/main caps) to 8,000rpm+ and made over 1000hp! His Fbody went low 8's@170mph+ at over 3,000lbs.

How how do you plan on spinning the engine?

I'm spinning a stock '99 shortblock with Katech rod bolts to 7,000 daily.

 

If you would like to see the advantages of an over square cylinder using forced induction just look @ W2W's recent build Casper . They used an 6.0 block and a forged crank , Callies I believe , to achieve 35x cubes and well the power and performance speak for itself . 6.85 @ 206mph or something really close to that .

 

I know someone did a 302 LS1 a few years bakc, saw it in a magazine... I haven't seen one done with boost before but that doesnt go to say it hasnt happened, kinda curious myself =)

 

That guy is on this board, but unfortunately cannot remember his SN. I talked to him about 3yrs ago, when I entertained the idea of destroking to 302 for a throwback to the 69 Penske/Sunoco Race Car. I love the sounds of American muscle at 9k+ rpms. Now, as stated, add a turbo or two to that and one killer deal. GL.

Charlie

 

The GM/Westech pewter car from around 1999 had a custom engine in there, it was a destroked engine. I drove it twice. It was like a 3.900 bore with a 4.8 crankshaft.

I don't see any advantage in running less cubes for us.

 

W2W builds then casper is a de stroked 6.0L. like a 3.5 stroke

 

W2W builds them casper is a de stroked 6.0L. like a 3.5 stroke

 

save alot of the trouble and use a 293ci 4.8L hehe

 

they did just to commerate the 30yr anniversary. Pushed about 400 flywheel

 

I was looking at doing the same exact thing. I was going to use a LS2 block and destroke it to 3.27". That would give you 329 ci and a great rod ratio. What kind of RPM can the valvetrain take in upgraded form?

Put a pair of 50 trim turbo's on there and you have 1,000 whp potential and full spool at 3k RPM.

 

Off Topic

Mccord actually had that motor or a similar 302 LS1 in his car the last time I talked to him.

 

No reason to de-stroke the engine unless you are limited by class rules or turbo rules.

Jose

 

I've debated doing it just for my 5.0 friends who say "but you have 44 extra cubes"

But if that is the best reason to do it, I would be better off building a 370 motor "cause that is my ASC build number"

Ryan

 

To be honest with you I would love to see that...lol.