ameaglemike

Hey everyone, I was just wondering what is the smallest diameter SC pulley that people have seen out there?

cawpin

I don't have a SS/SC, I have an LT, so don't take this as gospel. I think the smallest you can do is 2.8 without modifying the blower. If you machine the nose of the blower housing I think you can go to 2.5 or something close.

Edit: Search for "machine blower" or somethig similar and you should find it on here.

patathSS

ZZP makes a 2.6 that can be used without machining. Pulleyboys has a 2.4" pulley

DWK5150

I have a 2.4" but havent put it on yet.

CbYellowSS

zzp has a 2.6 that you can use with out moding your blower

NoRemorse

ZZp also has a 2.35... but refuses to sell it to us

That's ok, I;d be afraid anyways

Sp00ner

Refuses to sell it to us? Who do they sell it to then?

DJinAC

GTP and Regal guys I guess.

roccityroller

that's REALLY small on a m-90

Sp00ner

So, I've got a nice, new, Saturn Regal...

NoRemorse

Dan's been trying

roccityroller

he would

Zooomer

iTrader: (1)

We have down to a 2.35 that would work on the Cobalt but after dyno testing we've concluded that trying to make more boost than 18psi will cost you more than you gain. So if you are seeing 17-18 psi, look to do more mods before dropping in pulley size.

Sp00ner

So you're basically saying it's pointless till you can move enough air through the head to drop boost pressures down enough to make that small pulley use less hp... Got it, and thanks!

Witt

AKA Methanol Injection for less than 2.5"

Sp00ner

You're still gonna loose power if what he's saying is accurate though, and looking at the 2.5" dynos, I have no reason to doubt him... it's the boost pressure + rpms that = hp loss... so if meth injection would work, and if it was heat alone that was costing all the power, then an ice box would work too. As would real cold weather... I think he's saying that it's the parasitic loss in addition to the heat....

rickyw

we just need a new supercharger to swap on........... someone please jump on the wagon and get us one.......

BallsoutBalt

FALSE!!!!!
I just put on the ZZP 2.7 and I had to machine the snout for it to turn properly.
I was pissed that they (ZZP) put false info on their site.

Sp00ner

It seems to be about 70/30 for those that fit and those that dont. Even the ones that don't only need a minor clean up job to work correctly...

Sp00ner

Yes, twin screw or M90 adapter plate.... God I wish I could fab metal... stupid Computer Science degree...

BallsoutBalt

That is correct. Weonly needed to take of a tiny bit. But If we didn't have a dremel handy, I would have been screwed. I just think that should be addressed in the info given on the site.

Witt

Methanol would definetly reduce the power loss.

You're thinking of a single gear dyno pull. What I'm thinking with the 2.35-2.4 is building that boost and creating torque sooner. The peak HP may not change, but after upshifting you'll be creating more torque and hence better times.

This is just IMHO though. I would love to see a dyno with a 2.35 or 2.4 with or without methanol/water injection.

greekss

Now this may be a stupid question, does a smaller pulley cause the belts to slip?

djt81185

zooomer...why not just put the pulleys up..i been trying to get a straight answer from u gys as to whether your 2.35 AND 2.4 would fit. I wanted to try it with and without meth injection since i already have 2.5 dynos done

BallsoutBalt

Really depends on how small you go. My 2.7 does not slip with only the adjustable tentioner (from Cobaly-Addiction) set on the second setting. In my oppinion if you want to keep your car as a daily driver and want to play it safe, then stick with 2.7 or above.