Iron Block 352cid
9:1 Compression
Forged Pistons
Forged Rods
Stock Crank
Hand ported heads with Manley Stainless Valves
Comp 918 Springs (.600 lift)
Comp Cam (221/227 .561/.569 114)
LS6 Intake
Stock TB
Mega Fuel system (1000hp)

Running both NA and N2O at the track (up to 250-shot eventually). Going to change from 3.42s to 4.10s next week. Current rev limit is 6500.

What is safe? I can only get to 132mph with 28" tire and 4.10s at 6500rpm. Prolly enough, but may need more with a big shot of happy gas <img src="gr_grin.gif" border="0">

 

anyone?

 

Reckless, keep in mind right gear for motor wont also be right, on N2o. Also 28" slicks will grow(usually) at hi speeds lowering rpm from 6500, and if you have an a4 your rpms with converter may be higher(slippage). To answer your question, if GM spins C5 motor to 6600 rpm, safe reliability built in to design, should allow 7000rpms in a 1/4 situation. <img src="graemlins/formula.gif" border="0" alt="[Pontiac]" />

 

I would not spin it past 7000 rpms.

 

I don't even plan on seeing 7000, but I wanted to see if I could get away with 66,67, or even 6800 if I need to. I doubt it though.

Thanks Guys!
Todd