Procharger pulley sizes

Sillysspeed · 12-30-2022, 06:18 PM

Hi there, I have the stock 4” pulley on my P1x. Still need to buy fueling for the car before installing. I’m thinking about riding up to Janetty and getting it tuned but I’d like to have a few different pulleys when tuning so I can swap at track etc. Has anyone sized down for more psi and how much psi did you end up with? Thanks!

Hammer-joe · 12-30-2022, 07:32 PM

I ran a 3.70 on my P1X with a stock lower, It had 14 pounds of boost. I have built engine so your results my differ.

Sillysspeed · 12-30-2022, 09:22 PM

Quote:

Originally Posted by Hammer-joe

I ran a 3.70 on my P1X with a stock lower, It had 14 pounds of boost. I have built engine so your results my differ.

Thanks for that info. It says stock is 7 psi so I might just need like a 3.90 or 3.80
To get around 10 psi

cjperformance · 12-31-2022, 08:40 AM

I have the 4.13" pulley, and psi varies through the rpms from around 6.5 lbs at 5k rpm to 10.5 lbs at 6900 rpm shift point.

Not sure if you are talking about wanting 10lbs average or peak. I have been thinking about going with a 3.9 or 3.7 also and dropping the shift point closer to 6500. Interested in your results.

Sillysspeed · 12-31-2022, 11:16 AM

[QUOTE=cjperformance;11267585]I have the 4.13" pulley, and psi varies through the rpms from around 6.5 lbs at 5k rpm to 10.5 lbs at 6900 rpm shift point.

Not sure if you are talking about wanting 10lbs average or peak. I have been thinking about going with a 3.9 or 3.7 also and dropping the shift point closer to 6500. Interested in your results.[/

Definitely want to make a few more psi that the stock pulley. Im spending all this $$$ on the lt4 stuff I want to stretch it out a bit 😁

IrocTodd · 12-31-2022, 12:29 PM

Quote:

Originally Posted by Sillysspeed

Hi there, I have the stock 4” pulley on my P1x. Still need to buy fueling for the car before installing. I’m thinking about riding up to Janetty and getting it tuned but I’d like to have a few different pulleys when tuning so I can swap at track etc. Has anyone sized down for more psi and how much psi did you end up with? Thanks!

I have used Jennetty and am very happy with his work. We are doing the fuel system soon also. I only live like 10 min from his shop

Sillysspeed · 12-31-2022, 01:05 PM

Quote:

Originally Posted by IrocTodd

I have used Jennetty and am very happy with his work. We are doing the fuel system soon also. I only live like 10 min from his shop

Dang lucky guy lol. He seems very experienced and thorough.

WiggyB · 12-31-2022, 03:57 PM

I'm running a 3.5 pulley and was hitting 8.5 psi at 5500 RPM. Upgraded my fueling to LT4 and I'm going back in for retuning and I'm expecting to hit at least 10 with the ability to go higher in the RPM range. I'm sure others would get more with a few more added fueling adjustments.

WiggyB · 01-21-2023, 07:47 PM

Quote:

Originally Posted by Sillysspeed

Thanks for that info. It says stock is 7 psi so I might just need like a 3.90 or 3.80
To get around 10 psi

Hit me up I have a 3.85 and a 3.5 I can let go as a set. Shoot me a PM if you're interested.

Kerry · 01-21-2023, 08:24 PM

U can figure about 1 pd per 100 thousand. Example from a 4 to a 3.9 is 100 thousands of an inch smaller and would give u about 1 pd more.

As far as total is completely dependent on atmosphere car build ect. What one person sees for boost is almost usless to another unless they are in the same location with the same weather ect.

Best to start with what u have and use the 1 per to get where u want to be.

another example I run about a 3 hundred thousand bigger in the winter cooler weather here at 1000 ft. Keeps about the same power.

If i run a 3.7 in summer I run a 4 in winter or cooler weather example. What boost my car makes in my location would have very little baring on what u would see on ur car at ur location.

If i went to Florida I am most likely gonna see more boost, I would say average 1 to 2 pds maybe more depending on the current weather. That means more power as well. Just from the weather would run better but then boost adds on top of that.

Bplang · 02-02-2024, 09:29 AM

Does willy still have pulles for sale i have 4.13 5pounds of boost 785 8615629

Bplang · 02-02-2024, 09:33 AM

Quote:

Originally Posted by WiggyB

Hit me up I have a 3.85 and a 3.5 I can let go as a set. Shoot me a PM if you're interested.

im interested lmk 785 8615629

12-30-2022, 06:18 PM	#1
Sillysspeed Drives: 98 Camaro Join Date: Apr 2022 Location: MD Posts: 274	Procharger pulley sizes Hi there, I have the stock 4” pulley on my P1x. Still need to buy fueling for the car before installing. I’m thinking about riding up to Janetty and getting it tuned but I’d like to have a few different pulleys when tuning so I can swap at track etc. Has anyone sized down for more psi and how much psi did you end up with? Thanks!

12-30-2022, 07:32 PM	#2
Hammer-joe Drives: 18 Camaro 2SS Join Date: Jul 2022 Location: In the garage Posts: 46	Procharger pulleys I ran a 3.70 on my P1X with a stock lower, It had 14 pounds of boost. I have built engine so your results my differ.

12-31-2022, 08:40 AM	#4
cjperformance Drives: 2017 Camaro SS 50th Anniversary Join Date: Apr 2021 Location: Missouri Posts: 929	I have the 4.13" pulley, and psi varies through the rpms from around 6.5 lbs at 5k rpm to 10.5 lbs at 6900 rpm shift point. Not sure if you are talking about wanting 10lbs average or peak. I have been thinking about going with a 3.9 or 3.7 also and dropping the shift point closer to 6500. Interested in your results. __________________ 2017 50th Anniversary Edition \| P1X Stage 2 DSX Aux Low Side \| LT4 high side \| Flex Fuel TooHighPsi Port Injection (installed & tuning) CircleD 3K Stall \| QA1 CF Driveshaft Forgestar F14 Drag 17x10 NT555R2 305/45/17 Rear Forgestar F14 18x8 NT555G2 235/50/18 Front 10.84@131 w/4.13" pulley ??.??@??? w/3.7" pulley (installed & tuning)

12-31-2022, 03:57 PM	#8
WiggyB Drives: 2022 Camaro 2SS 1LE Join Date: Nov 2021 Location: NC Posts: 275	I'm running a 3.5 pulley and was hitting 8.5 psi at 5500 RPM. Upgraded my fueling to LT4 and I'm going back in for retuning and I'm expecting to hit at least 10 with the ability to go higher in the RPM range. I'm sure others would get more with a few more added fueling adjustments. __________________ p1sc1 factory box w/ stage 2 intercooler, Lt4 fueling, JMS BAP, lt2 intake, kooks 1/78 longtube headers w/ h/f cats, alky meth kit, thpsi port injection

02-02-2024, 09:29 AM	#11
Bplang Drives: 2017 camaro ss Join Date: Jan 2024 Location: Kansas Posts: 2	Procharger pulley willy b Does willy still have pulles for sale i have 4.13 5pounds of boost 785 8615629

12-31-2022, 11:16 AM	#5
Sillysspeed Drives: 98 Camaro Join Date: Apr 2022 Location: MD Posts: 274	[QUOTE=cjperformance;11267585]I have the 4.13" pulley, and psi varies through the rpms from around 6.5 lbs at 5k rpm to 10.5 lbs at 6900 rpm shift point. Not sure if you are talking about wanting 10lbs average or peak. I have been thinking about going with a 3.9 or 3.7 also and dropping the shift point closer to 6500. Interested in your results.[/ Definitely want to make a few more psi that the stock pulley. Im spending all this $$$ on the lt4 stuff I want to stretch it out a bit 😁

01-21-2023, 08:24 PM	#10
Kerry Drives: 2019 2SS Camaro Join Date: Apr 2012 Location: Al Posts: 828	U can figure about 1 pd per 100 thousand. Example from a 4 to a 3.9 is 100 thousands of an inch smaller and would give u about 1 pd more. As far as total is completely dependent on atmosphere car build ect. What one person sees for boost is almost usless to another unless they are in the same location with the same weather ect. Best to start with what u have and use the 1 per to get where u want to be. another example I run about a 3 hundred thousand bigger in the winter cooler weather here at 1000 ft. Keeps about the same power. If i run a 3.7 in summer I run a 4 in winter or cooler weather example. What boost my car makes in my location would have very little baring on what u would see on ur car at ur location. If i went to Florida I am most likely gonna see more boost, I would say average 1 to 2 pds maybe more depending on the current weather. That means more power as well. Just from the weather would run better but then boost adds on top of that.

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