Hi all, Does anyone know or can help me measure the size of the Stillen High Boost pulley if u have it for your Stillen stage 4 SC..03 to 06 VQ35DE
I recently asked Stillen but my rep said they dony make it anymore..The gold pulley in the pic for ref:
I dont have the gold one but my silver one is 56mm..Dont know what size the Stillen high boost pulley was.
I can custom make one here..My mechanic said its best not to go too small..About a 53 or 54 as the stillen wouldnt take so much more boost..Does 53mm sound about right? Any help would be great..tks all

 

Move to the appropriate forum, it'll get more knowledgeable traffic here.

 

Just keep in mind a higher boost pulley also means higher intake temp, I've actually seen the scenario where people have pushed the threshold of what the S/C was capable of and it was a zero net gain due to the much higher intake temps. No clue if this applies to the Stillen S/C but it's worth investigating.

 

Yes, I know..Got the water/meth injection kit to battle that..Will investigate more as well..tks bud..

I am not talking about the actuall pulley for the snout..i have kept that the same size..The gold pulley pictured above..Are we talking about that one?..thats the one I want to make a little smaller..hehe

 

You should call Stillen to verify but I think they color coded their pulleys, I think it was BLACK - Stage1, GOLD - Stage2, RED - Stage3, BLUE - Stage4.

I'm sure any of the stillen vendors that used to stock the kit would know as well, try THMotorsports if you have a hard time emailing Stillen.

 

Did you ever find out the size? I have the same problem, gold pulley, I have all stage 4 parts but only pushing 5 lbs of boost. Stillen saying gold is stage 4 but I've read the charger rpm and worked out the math...the rpm works out to 5 lbs and thats what I'm reading. Its not spinning fast enough. Anyone know where to source a pulley as stillen is not helpful.

 

What source did you use to verify gold is stage 4, when I posted my last comment about the color codes that was from an email directly from a vendor that used to carry the Stillen SC and they told me gold was stage 2 which would be in line with your 5psi.

 

It was Stillen customer service. Is blue stage 4?

 

Hey mate. I have the stillen too and put on a ati over size crank pully by 25mm. I'm getting 5psi at 2000rpm and a peak of 8psi over 4000rpm.. This has transformed the power and is still just within the limits of the roots supercharger.