bears416

I got a 98 c5, doesn't smoke, runs very well, doesn't burn oil. I got a v2si supercharger I want to use. The car has been beat on but has been treated rite. Rite now its a btr stg4 cam, 1 3/4 headers, 799 heads, arp head studs and new ls7 lifters, all mods been withink last 5k miles. Would you guys feel safe boosting this to the 530-570rwhp range, I will be spraying lots of methanol and not revving past 6700. The cam will also be different im tryin to spend money on the drivetrain instead of the motor.

redcycle13

I would boost it without worry.

bears416

Thats what im thinking, it seems with methanol and a good tune that up to 600 can be reliable is that what you have seen?

redcycle13

These motors are pretty durable in stock trim. If you keep the boost levels reasonable, and don't try to kill it, then it should last a long time with a good tune. Lots of cars have lived a nice life in the 500-600rwhp range. Nothing is certain, and a stock motor can come apart, but if your car were mine I would have little to no hesitation boosting 10psi or so with meth. I'm now on my third engine in my C5, fifth LS with boost and none of them have died on me. Only the last two in the C5 were built motors.

Arnie Chamberlain

Do it - I run 10 Psi on a Vortech/A&A Kit on a 115k mile engine. No blow by, no issues.

Only engine upgrade was Lunati dual valve springs and Comp trunnions.

Makes 535 horse on 93 octane. Good enough for a daily driver.