With the 44 tooth main drive cog pulley I'm seeing 14psi right about 5k rpm's. It was stuck at that before because the intercooler was too small, but that' been fixed. Plus I"m running 8.5 to 1 compression pistons because I planned big boost from the beginning. Stock supercharger would probably be better off with a little higher compression if not going over 10-12 psi. I have not seen exactly how efficient/inefficient the ATI blower will be at higher boost but we'll find out soon.

 

What kind of Whp are you seeing at 14psi. My brothers recently made 490whp at 13.5. His motor is built well enough to handle 18psi but we dont know where to get the belts and pullies. Or what size. Also what kind of power and torque are you all seeing. He made right below 400lb/ft. I think it was 388lb/ft.

 

have not seen the figures yet becaue the car is still in fabrication mode, but we are hoping for over 500 at the wheels

 

What type of head unit is procharger using on the 350Z kit? P600 or P-1SC.

 

Does anyone know what I would have to do in order to get 17-18psi out of the ati kit?

 

Direct drive off the crank pulley...No serp belt . The ATI has two cog belts , but the first one is still driven with the serp belt . Like the Vortech....this has to be eliminated to get the most out of them

 

It's the C2 unit, rates for 24psi of boost and max 1200CFM's of airflow, but in the real world this is just fuzzy math because it's does not work out this way.


The 44 tooth cog drive pulley is the biggest one they make for the C2 unit by Procharger. But the fact is that the C2 unit was built for effeciency around the 7-9psi levels. When you spin it faster that 80,000rpm's things become extremely inefficient and you end up making allot of heat, plus the belts break because the blower flexes forward from the brace not being strong enough. Procharger and Vortec make some huge blowers, but the Z design was never meant for big power unless there is a custom head unit specially made by either company that simply flows more air in a more efficient manner.

If you want 500rwhp or more with boost only then go turbo. But I'll be happy with 450+rwhp and a little nos for some extra fun if needed

 

This is becomming allot of work, I would assume the Vortec unit (stock) would become inefficient as well from being overly spun. I say get 450 at the wheels and be happy because dont see things changing much untill there is a bigger head unit made. But even if that was the case a bigger blower would make the car unstreetable because it would just suck for daily driving where as with a turbo you wouldn't even know it was there untill under wot

 

The Vortech T-trim will flow enough CMF to support 600whp I believe . DSport mag will be showing a G35 soon to prove it . But your right...a all cog belt system was needed to get it there . And if my car wasnt an AT5 I think the 500whp level would be doable with the serp belt set up .

 

I totally agree Booger, but the stock unit with either company will not be efficient with the stock units spinning too fast. This is simply a fact, I think many like to believe that if you spin faster you get more boost but the truth is that you get lots more heat, not power. I was one of the "hopefull" people who though spinning my procharger would make huge power but all I ended up getting was a little more boost with allot more heat. But I also agree the bitter t-trim would spit out more air. Procharger as of yet does not make a bigger untit but I"m sure it would help make more power