Im just curious, at what RPM is everyone making full psi? I know it will vary from setup to setup buy I am just curious to see what setup creates what variances. ..

So do post and let me know and be sure to include what your setup is and "x"psi@xxxxRPM

 

Mine show about 6700rpm according to my scangauge.

 

What psi and pulley/setup? On mobile app sorry cant see your sig if listed.

 

15% pulley at Aprox. 14.5psi

 

Ever had the car dynoed?

 

Nope. I should of mentioned I have a slighly modified head also. I am moving to Flordia hopefully next month. Then I will get the injctors and a tune then a dyno test.

 

Where are you located now just for elevation reference

 

Pike county PA. My house is at 1400ft above sea level.

 

Ok so youre about double my elevation roughly, thanks for the info. Gotta pulley tool I can borrow good sir? Lol

 

I do not. I am sorry. Where are you?

 

Nc

 

Start a new thread seeing if anyone in NC is close to you that can loan you one and or help you.

 

Nobody on the local forum ever gets on, its a wash.

 

I dont mean local. Do it on here as there are MINIacs all over the place.

 

approx 16.5psi@6700RPM in northern TN

 

depends on what gear i guess. ill hit around 15-16 around 2-3k or so (say from 2nd gear, not launching from first), then at maybe 4k the boost gauge tachs out at 18.

JCW with 17%, intake, ect.

 

Boost keeps climbing till the limiter. Hits almost 17 psi.

Running mostly stock except for Cai and cat back exhaust with a 17% reduction pulley

 

Ok, I just tried this again this morning and in 2nd I saw 15.2 at 6500-6600rpm.

 

Yeah, mine does not get that high. It's probably because of the altitude and the temp (it's been around 0F). I tried in second and don't get higher than 5.6 psi, but my gauge starts at -3.4 psi before I start the car (ultragauge) because I'm at 6500 feet here. So I max out at about 9 psi. I'm bone stock still, can't wait to put a pulley and cai on it and maybe an exhaust to get more air flowing through then engine.

 

are you at sea level??

im at sea level and have been told i should be getting more boost then 17psi

although i am using a cheap mechanical gauge. may affect things

scan gauge has been ordered so hopefully i can give a more accurate measurement soon!

Matt

 

Pike county PA. My house is at 1400ft above sea level.

 

Mmm perhaps my boost is low

 

Well with a 17% installed and a fresh new belt on (535 belt) I have new info on this subject. Using a Genisys Evo 5 scan tool, reading live data I measured a whopping 12.34psi at WOT/Redline in 3rd gear. 32 degrees outside, 800ft elevation.

I also noticed, after installing the pulley last night my belt tensioner is showing only about 1/2 of the hole on the tensioner strap (the one you put a pin in to hold in place when doing a belt). I also have the VGS setup on the car, idk if maybe I have a leaky bpv?

Suggestions, comments?
Leaky BPV?
Need to run a 532 belt?

I have ruled out wear and tear on the supercharger itself, as I was making a healthy 10.5 psi on stock pulley just a week ago and a stock belt obviously.

Do most ppl go back to factory vacuum routing with a pulley or keep the VGS?

 

You should be pulling 15 lb.+ EZ. Have you tried a smaller belt yet?

 

Now running a 532 belt, 1 hole visible on the tensioner, I topped out 3rd and 4th gear to reveal a max of 14.6psi using my torque app and bluetooth dongle for obd.

I didnt get any variation of boost level when switching between vgs mod and stock only sooner onset of boost pressure.


It seems as if everybody else is hitting a healthy 15+ with stock setups and 17% pulleys


I feel like I should try with a boost gauge instead of a phone app boost gauge. Any common boost leaks on these cars?