alecsm

hi all !

i need to know if anybody have some maths formula to get a hi PSI for an modified pulley !

i need to know for my vortch s/c pulley

i have a lot of mods ...don't worry about my engine !

thank's !

D_Gusler

For the s-trim, I know the following for fact---

3.80 roughly 8/9 psi
3.60 about 10.5
3.48 runs 11.7psi<----what I'm running.

According to vortech, you gain roughly 1-2 psi for every size smaller pulley. Which from personal experience is true. I have a 3.6 pulley if ya need it. We have 6-rib setup on our cars, but vortech does offer an 8-rib setup for about $500.

modaddict

^^^Ditto. I made about 14 psi peak with the 3.33 pulley. You can also add an overdrive pulley over the crank pulley or a bigger crank pulley and gain there as well. This is what we do to all blowers kits once we're down to the smallest pulley size. For example, A cobra crank pulley will net you 2 more psi on whatever pulley you are using...

Be careful with big boost on the Vortech. At 16+ psi - I could not keep a belt or tensioner on the car to save my life. Regardless of the kind of tensioner, the kickback on decel with the vortech is stupid with big boost.

tom281

Boost depends on the amount of restrictions. I have a 3.33" pulley and see around 11psi max with a Paxton air-to-air intercooler, headers, offroad exhaust, and delete plates.

alecsm

ok thank's for reply guys but please tell me if you know what setup is needed for 16-17 psi ?? when i said setup, i mean pulley, belt , belt tensioner

here are my mods

Engine
Tremec TR6060 6-Speed Transmission
Steeda Tri-Ax Remote Racing Shifter
RAM Street Dual Disc Clutch - 3V - 26 Spline
Steeda Aluminum Driveshafts - 05-08
Auburn Locking Differentials
4.10:1 Ring & Pinion
Steeda Heavy Duty Engine Mounts
Steeda Charge-Motion Control Plates
Eagle 4340 Forged & Balanced Reciprocating Masses - from 4.6L to 5.0L Stroker
Vortech HO Cooled Supercharger
JBA Long Tube Headers - Ceramic Coated
Magnaflow H pipe With cats
JBA axle back
Brisk Silver Racing Spark Plugs
Chasis & Performance
BREMBO front brake kit
KW stage 3 suspension
3 Point Frame Rail & Torque Box Brace
Steel Strut Tower Brace
Steeda G-Trac Brace
Steeda Front Swaybar Mount Brace
Steeda Rear Shock Tower Brace
Steeda Adjustable Upper 3-Link
Steeda Lower Control Arm Relocation Bracket
Tubular Upper 3rd Link Control Arm
Steeda Chrome Moly Steel Lower Control Arms
Steeda Competion Adjustable Race Panhard Bar
EIBACH Front & Rear Swaybar Kit

thank's again

mygt500

Welcome-Can we get pics of the car and the engine bay! This thing sounds great! Must ride extremely well! J

alecsm

thank's ...i hope to ride extremely well because it's not finished! i still wait some parts unfortunetly !
i ll put some pics with my body kit !
http://www.picoodle.com/view.php?srv...3m_00f3171.jpg

modaddict

Something is wrong or you don't have the pulley you think you do. With a 3.33 pulley and even a fairly conservative tune, you should see at least 12 psi...

D_Gusler

^^agreed. I make 11.5 psi with the 3.48 pulley.

alecsm--go to vortechs website and look at their 8 rib pulley setup for mustangs, should solve you dilema

Burton9104

I must agree with Tom281- Boost on these cars is directly related to the restrictions of the intercooler and intake system you have. I have built an un-intercooled vortech with a 3.48" pulley and made over12psi at 6500. On mypersonal carI run the 3.48" with a Vortech Waterbox intercooler and barely see over 10 at 6500 I am looking to once again go up in boost to the 3.33" now that i am running methanolwith the intercooler. TOM281- How do you like the 3.33" she run well?