robbywk

My buddy asked me to post this thread, and he has a sleeved and fully built d16, tuning it with s300. We have a really reliable tuner and a freshly rebuilt turbo fresh from the factory, he drove the brand new built motor 1500 miles to break it in and everything. The car used to make 303hp on a t25 turbo. And he has a Precision turbo good for like 600hp.

we were going to street tune, then go to a dyno down state to do finishing touches.

So we went out to tune it on race gas, street tune, and it ran alright. until we kept getting the same results for different boost pressures.. the air fuel is picture perfect, compression is fine, timing is fine. But it literally runs no better than on 12 pounds, and 28 pounds....

The 12 pounds ran fine, and his darton sleeves are rated high so obviously we were going to turn the boost up. and we did, and got no results. Spooled fine, no leaks we could fine, hit peak boost and held fine, ON 28 POUNDS and it was probably around 240whp (air:fuel and everything was fine, as well as leaks) We are completely stumped, as to why the motor is just eating boost and why its not making the power it should. Any imput would be awesome, thanks