Procharger Pulley Sizes = what boost?

[Quicktime_GT]

Hey guys, I'm running a 3.4" pulley now, and making 10psi at 5600 or so. I noticed on a dyno sheet in one pull the boost reading actually fell a little on top.

What kind of boost is a P1SC suppose to make with a 3.4" pulley, stock crankshaft pulley on a GT ?

What kind of boost are you running with other sized pulleys?

[OrangeMach23]

Originally Posted by Quicktime_GT

Hey guys, I'm running a 3.4" pulley now, and making 10psi at 5600 or so. I noticed on a dyno sheet in one pull the boost reading actually fell a little on top.

What kind of boost is a P1SC suppose to make with a 3.4" pulley, stock crankshaft pulley on a GT ?

What kind of boost are you running with other sized pulleys?

I am running that pulley and I see right at 10 PSI. The pulley is good for 10-12 PSI with the P1SC.

[TClark22]

yea on my P1SC with 3.4 pulley its 10psi

[Bmeagher]

And what does that have to do with pulley size?? I'd like to run 8-9psi.
What pulley do you guys recommend?

[Cookieman00x]

with a 3.4 and my p1-sc with a power pipe and full exhaust I saw 12.5psi

[mustanginky]

3.4 with an anderson powerpipe i was hitting 12 psi. then my stock pistons said "get the eff out with that".

i'm running a 3.7 now and hitting 7.3 with a stock procharger inlet. just for those who want a point of reference.

[White04GT]

I believe mine is a 3.4 with the AFM power pipe. I have bassani headers, and o/r x pipe and I am seeing 8.5 lbs of boost.

[Bmeagher]

Nobodys pulley size and psi is consistent. Even from stock exhaust to full exhaust, it doesn't always mean less boost. Whats sup with that?

[OrangeMach23]

Originally Posted by Bmeagher

Nobodys pulley size and psi is consistent. Even from stock exhaust to full exhaust, it doesn't always mean less boost. Whats sup with that?

Call or e-mail ProCharger for the correct answer.

[OrangeMach23]

Originally Posted by White04GT

I believe mine is a 3.4 with the AFM power pipe. I have bassani headers, and o/r x pipe and I am seeing 8.5 lbs of boost.

It's probably a 3.7 pulley to make 8.5.

[IUP99snake]

I have a 3.9" pulley. Its the same size that came with the procharger kit, and was designed to make 10LBS with a stock 99 cobra. That it did.

With an aviator longblock, O/R X pipe, Cat back, and 4" Morpheus powerpipe, the same pulley makes about 7-8LBS of boost. The morpheus pipe probably gave it an extra 2-3LBS of boost, but it lost more than that because the 03-up heads/cams flow much better, but also give the motor a 500RPM lower redline.

I briefly put on a 3.1" pulley and was rewarded with an extra 5LBS of boost at 3000RPM, but it wouldn't go any higher than 12LBS of boost after 4500RPM (probably because I had a crappy belt).

That 3.1" pulley is for sale, by the way. Anyone want it?

Homer

[Bmeagher]

I received my p1sc today, it has a 3.9" pulley on it. I have P&P intake, hookers, plus i'm going to go with a AFM powerpipe. Hopefully should be able to see 7-9psi. I'll pick up a Procharger boost gauge, and see where i am. And then decide what i'm going to do after i see the boost numbers myself.

[TClark22]

Bmeagher...is that a new kit from procharger? they must be putting 3.9 on them now instead of the 3.85 pulley from the slightly older kits like mine used to have.

[Bmeagher]

TClark22.....I think it's at least 2 years old. It's off a 01' Cobra. Are you still using the 3.85 pulley? And if so how much boost are you running?

[TClark22]

no i am not still using the 3.85...but i made around 8psi depending on weather conditions and whatnot...like during the 90+ temps it made around 7.5psi and prob around 8.5 in colder conditions. that was on a stock tb and plenum...

i am using a 3.4 pulley on mine now. and i make 10psi...the 3.4 would make around 12 but i am still running stock tb and plenum.

[01SilverGt]

anyone have a 4.0 or 4.15 6 Rib pulley laying around? I have a 3.9 on my car right now with a d1sc, gives me 10 pounds at 6k rpm

[MDK210]

anybody know where the size is located on the actual pulley? I found a number but it reads 3.100 DIA...
I called ATI and they said it doesn't sound like their pulleys, theirs would say 340 if it was a 3.4 and be black. They would never recommend a 3.1 since the 3.4 from ATI can create 12.5 psi just like I run. From a old dyno chart it made the correct psi and 6K rpm so I asked them how that's possible. He said maybe it's consistant belt slipage...

[02blownGT]

I was making 10 psi with a 3.4,AFM power pipe,and full bolt ons.

[1BAD96SVT]

I was making 9.8lbs with a 4.00 pulley with and without a AFM powerpipe.Call up procharger and speak to a tech.

[01greycobra]

Seems as though the same pullies make different boost #s for every car. With my D-1SC, I saw 10 lbs with a 3.9 pulley and now 18 lbs with a 3.4 pulley. Im using a Reichard Racing pulley currently.

[flowgoode]

96 cobra w/ stock heads/cams/intake/TB/exhaust manifolds/off-road x and flows.

built block at 9:1 compression.

p1sc, AFM powerpipe, 3.4 6rib pulley = 13 psi @ 6800rpm

my .02

[SYMach1]

Yeah everyone car is diff, My d1 setup on a 4.00 pulley with a powerpipe and stock manifolds and o/r xpipe saw 11psi with a 9.1CR,now with a 3.5RR pulley it reads about 15psi in the summer. I think the d1 sees about 3-4psi on the same pulley setup as a p1 does

[Cobra96SVT]

The reason for the way different boost numbers for the pulleys is because I believe procharger had two different impellers when you bought the kit. The Higher boost kit had a different impeller to hit around 10lbs i believe with a 3.9-4.0 pulley and the lower boost kit had an impeller that would hit around 6-8 lbs with that same pulley.

Don't quote me on any of this but I'm pretty sure thats the reason for the huge difference in boost numbers. And I believe this was for the P-1SC, It may be the same for the D-1SC too since I believe you could have upgraded to that headunit with the kit.