Originally Posted by 95z28man

The short version is that I bought a h/c/i kit from someone off the boards. I installed them on my stock motor, and took to the car into have it dyno tuned. It made 360rwhp with that setup, then the bottom end gave up before they were completely done tuning it. I had them rebuild the motor with the current details in my sig. Heads and intake were kept, but a cam was thrown in more suited to the 383. Motor is built for nitrous down the road. The only thing keeping this car from being fully emissions legal is the fact that I removed all emissions equipment and have a full exhaust from the headers back, with no cat's or mufflers, just the LM.

The heads and intake turned out to be some sort of a backyard garage or basement port-job and they were claiming to be something they weren't. So while the new cam is good, I still have lots of room for improvement with the intake and heads, hence, the "low" dyno numbers. I'm also pretty sure more power COULD be tuned into but keep in mind it's mainly a street car and squeezing every last hp out of it wasn't the goal. Before I hit it with nitrous though, I would like have the top end redone by my shop and should easily see 400+ at the wheels both hp and tq.

Originally Posted by SS MPSTR

Thanks for the short version I recall the earlier posts about this issue now.

WRT your question, I would personally put in a 3.75" crank/5.85" rods in it now with pistons set up to handle your future nitrous application. Some would argue that the specific goals at this time do not warrant such decisions (and they are right), but once you have achieved one power level goal, you'll just want more and with this method, you'll be in a better position to add more nitrous.

With a nice set of heads, and everything put together well with the tune correct, it should see 400rwhp easily. Good luck.