effects/possbility of 3.8 to 3.3L destroke

[navyblue2000]

They've talked a lot over on some v8 boards about destroking a 305 so that the bore stroke ratios are closer, and so the 305 can rev higher, producing higher horsepower numbers. I'm wondering if it's feasible to do with a 3.8L. back in the mid 1990's there was a 3.3L engine made, just a destroked 3.8L. Would a 3.3L crank and internals fit in the 3.8 block, then? i would imagine so...Perhaps that, a cam, forged internals, and like a 7500 or 8000 redline for higher horsepower out of our engines?

[3.4 slow to go]

don't do it man! if you want to have a rev happy motor get that honka s2000. And weren't those motors fwd exclusively? they probobly had the cranks special for them too. The more power you make with having to rev the motor less will set you up w/a more reliable motor. Perhaps a better goal would be how to get your motor to rev quicker to it's yellow/red line than increasing it.

[Patrick Javert]

I'd suggest aluminum heads because of their superior flow properties as well as the ability to raise compression a full point and still run on regular gas. this may be an even more reliable motor because the rod to stroke ratio is larger, meaning less angularity when pumping. Another good thing about destroking is that it lowers static compression while keeping the same pistons. This would work well w/ forced induction, especially since turbo's and centrifugal superchargers produce more boost at higher rpm's. The problem is, you couldn't get much out of the low end since we don't have vtec that kicks in around 3500-4000 rpm like Honda's do. just keep the crank the stock specs but get forged internals for them and run a 6500 redline, or maybe 7000 w/ aluminum heads.

[navyblue2000]

http://www.camarov6.com/cgi-bin/ulti...=6&t=005832&p=

can we get an ignore button, please? :rolleyes:

[Magnus]

Umm... I'm just gonna say, don't do it. [img]smile.gif[/img]

[nova]

Reving higher is really killer on reliability. If I remember correctly (and I could be wrong about the number) engine component stress goes up as a cubed function to engine RPM.

So if you double your engine RPM, the component stress goes up by a factor of 8.

[Shadly]

You're thinking correctly, just backwards. If you destroke an engine, you are effectively decreasing power for strength. If you increase RPMs to bring back power, you will have a heck of a time with efficiency. If you really want less stroke/more bore for RPM purposes, overbore your engine.