[DMacMilitant]

I measured the pulley on my Vortech supercharger and it measures about 3.75" in diameter. I looked on their website and it must be the 3.80. That pulley is giving me about 6psi of boost right now. I want to up it just a little for some more power. I'm thinking 7-8 psi. Any tips on which pulley I should pick? Also, is a 1-2 psi boost going to be noticeable? Thank you for any and all help.

 

[2Manystangs]

I doubt 1-2 would be noticeable...when I changed mine from 6 to 12 I was like "wow", now that is what I always wanted the car to feel like...with a good tune it should be fine.

 

[foxbodymuscle]

I did the research a couple of monthes back on the same project with 10 psi in mid, here are some notes I jotted down.


Upgrade Kit for Vortech (Upgrade kit sold on superchargersonline.com)

• 8-rib 3.33” Supercharger pulley
• 8-rib 6.875” Crank Pulley
• Supercharger Belt
• Hardware, sleeves, clamps, and Manual
• T-Rex 255 Fuel Pump
• MSD Boost Timing Master
• Aluminum Discharge Tube
• By-pass Valve Assembly
37,000 spin @ 5200 42,000 @ 6000

53,000 max impeller speed



Cobbeling Parts together
Bosch 110 BOV – 65
8" crank pulley $200..( http://www.aspracing.com/index-8.html)
5462 - MSD Boost Timing Master 244.99 Jegs
Belt- 35
Hardware + hosing 20
1993 Cobra water pump pulley- $ 59.99/each
PPI | Engine | 1979-1993

43,000 @ 5200 49,[email protected] 6000

PSI will be different for every engine...

 

[Smurf stang]

If you can't find a smaller supercharger pulley then you could swap out the crank pulley. Make sure your fuel is up to snuff and Yes you will notice 2 lbs of boost cause 2 lbs is 2 lbs no matter how you cut it.

I used to have a Nissan SE-R with a DET swap and on those very cold mornings it would pick up over a lb of boost and you could feel that she was running harder than those other days without it.