P1X Pulley size recommendations

[sloride]

Currently stg2 P1X on 2016. Stock pulley size was 4.75” at roughly 9psi. Upgraded my fuel system and going E85. Want to target maybe 13ish psi. Guesstimate pulley size I’d need? 4.25”?? Thanks!

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[80FoxCoupe]

4.25 sounds good!

 

[sloride]

4.25 sounds good!

Come on Spring!!

 

[SolarFlare]

I agree I’m on a 4.25 and saw about 12-12.5

 

[sloride]

I agree I’m on a 4.25 and saw about 12-12.5

Cool thanks. Any rough dyno numbers on E85?

 

[SolarFlare]

Cool thanks. Any rough dyno numbers on E85?

None yet. P1X just got put on. Same pulley on P1sc made 750/527

 

[turnswrench]

p1x stage 2 4.5" pulley on a 2018 car with catless long tube headers = 770rwhp at 7300rpm on 9.9 psi

 

[RBINCA]

2018 with P1X stage 2, E85 with 4.25 pulley. See right at 12 psi.Good pulley size choice it will put you in the sweet spot. Never been on dyno. TONS of power!

 

[sloride]

2018 with P1X stage 2, E85 with 4.25 pulley. See right at 12 psi.Good pulley size choice it will put you in the sweet spot. Never been on dyno. TONS of power!

Nice! Looking forward to trying it out.

 

[sloride]

None yet. P1X just got put on. Same pulley on P1sc made 750/527

Curious to see what you get with the P1X

 

[Stephen@lethal]

I would also suggest a 4.25 pulley, however if you want to go down in pulley size, I would also suggest picking up a Griptec pulley to help out with the added boost. They make a killer product for the price. https://www.lethalperformance.com/s...d-mustang-gt/pulleys-2/sueprcharger-pulleys-2

 

[sloride]

I would also suggest a 4.25 pulley, however if you want to go down in pulley size, I would also suggest picking up a Griptec pulley to help out with the added boost. They make a killer product for the price. https://www.lethalperformance.com/s...d-mustang-gt/pulleys-2/sueprcharger-pulleys-2

Was definitely considering when I iron out a couple other things. Thanks.

 

[sloride]

Got a chance to do some hits to shake the car down. Had a 4.5” pulley already and verified that was making 11psi on a relatively dry 60deg day. Still think I’m going to pull the trigger on a 4.25” griptech pulley to get close to 13psi. What are the thoughts on just running a regular Gates belt with the griptech vs. green vs. RPM.

 

[Toy Cobra]

I use a Griptec and a Green belt. It doesn’t show any signs of slip.

 

[Jay-rod427]

I ran a 4.1 on stage 2 p1x and made 17 lbs at 8,000 with a gates green, stock procharger pulley. Stage 2 doesn't really need anything beyond a stiffer belt. It has good traction because it wraps so much surface area on the pulley.

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