8 rib Vortech blower pulley, 3.15 and or 3.33

[Silver Bullet]

Anyone have one or both of these?

[347sc]

I have a 3.3 on my S trim. What you got to trade on?

[Silver Bullet]

I have a 3" on my blower..... I don't know where the motor is going to make power but we are figuring 7,000 to 8,000, so I need to slow the blower down to keep from overspinning it.

[347sc]

We can swap out pullies. Wonder how the belt will fit? That pully will spin mine about 5000 rpm faster

[347sc]

Are the shaft size the same??:confused:

[Silver Bullet]

That I dont know, Mine is a YSI.

[347sc]

Well check and see. If so we can swap em out. Is your pully 3.00? I didnt see one list on Vortechs site.

[ibstrokin]

Yes, they are the same shaft, same step up ratio also( if figuring impeller speed ). If you still need to slow the blower down, you can always step down to a 6-7/8" crank pulley. You may want to play around with the impeller speed calculator on vortech's website.

[Silver Bullet]

Yes, they are the same shaft, same step up ratio also( if figuring impeller speed ). If you still need to slow the blower down, you can always step down to a 6-7/8" crank pulley. You may want to play around with the impeller speed calculator on vortech's website.


I have played around, and what I was thinking, instead of going with a smaller crank, go with the larger blower pulley. My logic is it will be a larger surface/contact area and you should see less belt slippage..:)

[ibstrokin]

I have played around, and what I was thinking, instead of going with a smaller crank, go with the larger blower pulley. My logic is it will be a larger surface/contact area and you should see less belt slippage..:)

Absolutely, I was just offering another alternative, I wasn't sure how much you were trying to slow it down.

We will have to trade notes this year, I have a 331/ysi combo I'll be sorting out through out the year.

[Silver Bullet]

Absolutely, I was just offering another alternative, I wasn't sure how much you were trying to slow it down.

We will have to trade notes this year, I have a 331/ysi combo I'll be sorting out through out the year.

No problem.... sounds good to me... C YA at the Track!:bigthumb