From 2500-3000 there is about a second lag before it starts to REALLY pull. Thats to full boost. Much less time is needed to equal and destroy a stock engines output at those engine speeds. From 3,000 on up it spools very quickly. Anything from 4,000 up is more or less as fast as possible. Just floor it and its waahhhiishhhhh and you are gone.

The 50-120 runs I did in 3rd gear, so the engine was reving at about 5000-6000 RPM at the start. Lag? Not really. About 1/8th to a 1/4 second lag on shifts. Hopefully I can get a video up soon to show everyone what its like.

 

 

400 WHP @ 19.5 PSI?????????

There something WRONG

My Friend at your Same Boost PSI's Made 520WHP

me @ 12psi 380WHP Comptech SC

 

Methinks you can't read.

I have a 2.25" exhaust on my car, 9:1 compression, and a very small turbo for quick spool.

What turbo is your friend running? What exhaust? What manifold? How aggressive is his tune? Look at my power curve and let me know when you think my exhaust says "no, thanks, I think I've had enough air..."

The high boost to get this number is a result of a LOT of factors. Kleecker also needed high boost (18psi) on his GT35R to achieve 400+ rwhp. He is also using this HKS Hi-Power exhaust.

 

Just doubled-checked with Inline on the turbo selection. Officially it is a:

GT3076RB

- Garrett GT3076 core
- Precision Turbo B cover compressor housing. (For fitment). 0.70 A/R
- Precision Turbo T3 turbine housing which says 0.63 on the housing but it is in fact a 0.48 A/R
- Very limited by my exhaust. I call it traction control.

 

Some have just blown a hole in the frame, but mine is more of a notch.

 

That's why it poops out at the top end and you have to put so much boost to it to try and get a decent amount of power at 9000 rpm. Any turbine A/R smaller than .8 is just too small and the turbo always poops out on the top end or isn't efficient up there. That size of turbine housing just can't work efficiently at 9000 rpm and is why at 5000 rpm it is efficient.

 

I was curious about this.

I'm making the same power with the same kit and a slightly larger turbo @ 14psi.

I doubt a 2.5 inch exhaust would have the great an impact. I think the turbo is too small.

 

What turbo are you running??? Just out of curiosity

 

I pretty sure it's a custom 35R .50 A/R comp. with a smaller turbine A/R than the typical .7 to .8.