Just wondering what you guys are getting with the stock pulley....or were getting? When I first installed my kit I was hitting in the range of7.8-8.1PSI. The stock belt is crap and I had to replace it becasue I have the tensioner pulley all the way out and was losing boost. I just put the gates pulley on and can't get more then 7.4PSI. Just wondering if 7.4 max is around what you guys are hitting? I tightened all the clamps and don't think there is a leak.

 

Make sure its not rubbing on any thing , and the ribs are in all the groves on all the pulleys . You got to get it pretty dam tight...less that 1/2 inch of play . The Gates belt is much thicker and may tend to slip easier , but stretches less

 

I am ONLY hitting about 5.3 psi with a max of 5.7 psi on the stock pulley.

Booger, I drove over 600 miles over the past 2 days and I am no longer seeing a noticeable amount of belt dust that we were talking about in one of my threads. I went to the Tail of the Dragon so you gotta know I pushed the car rather hard.

 

On my Zeitronix WB A/F-EGT-Boost gauge I was getting 8.5 to 9. Now I am getting 10.8 PSI at 10.5 AFR with the new Kinetix SSV.

Jeremy

 

With the stock 3.33" pulley?

 

Yeah. What do most people get on the stock pulley? Oh yeah that's what this thread is for.

Have you adjusted your blow-off valve at all?

 

The 3.33" stock pulley, is suppose to give you 8psi. Well that what Vortech says. Hmmm maybe they gave you a smaller pulley with your kit.

 

Hell, Vortech must have given me the 5 psi pulley with mine!!

 

I feel your pain. You will get it worked out.

Jeremy

 

I wonder if I were to run the 9 or 10 psi pulley I would be OK still on the stock internals. If I am ONLY running around 5 psi with the 8# pulley, I should be able to run around 7 psi on the 10# pulley!! Hell, or maybe I should do what Booger did and have my blower upgraded to run around 15 psi so I can actually run around 11 or 12 psi!

 

I think we are missing the idea of F.I. Boost level by itself is not the most important measure of whether a car is making the most it is capable of in terms of Tq or Hp. A restrictive flow will produce a high boost level but lower Tq or Hp levels because the air will not flow freely through the engine.The only true way of assessing how the F.I system is by it's performance. Measuring it on a dyno and comparing the #'s to a similar F.I. set up..If you are in the same ballpark your probably getting the most your gonna get..If your not then look into possible leaks or adjusting the BOV or whatever, but low boost should not automatically be cause for concern IMHO..

 

This I know but... On my setup, I have the most free flowing exhaust and intake you can have. I have headers, test pipes and a dual exhaust system and the kinetix intake manifold. For some reason, I am ONLY making around 5.0-5.5 psi with about 340HP and 280TQ. I know of guys who are running very similar setups that have at least 40-50 more HP even with th 5AT.

My system has been pressure tested both before the blower and after and all leaks fixed. The BOV has been adjusted as much as it can be adjusted and I am STILL ONLY making the aforementioned boost levels.

 

Does test pipes mean no cat's?. The cats are quite restrictive. Without them building boost would be difficult..There is a sweet spot somewhere between free flowing and restricted flow..Too much of one or the other and the full benefit of F.I. is compromised..

 

This what I tried to stress earlier . Im the prime example . I had a real free exhaust and could only make 7.2psi . [ 350whp with the 3.12 pulley ] I added Crawdford cats and gained back 2psi and retuned for it and made [350whp] .