Topgunz - air to air upgrade

Originally Posted by turtle64b

Can you guys give the part numbers or link for the pulleys that you picked up from Vortech? Or let me know how you communicated your needs to Vortech. I want to change up my pulleys now for the high traction design given my lower-than-expected boost issue to see if that might help. The CRC dressing got me .3 more psi haha

I saw this one, Part# 2A038, on the Vortech website. It is the same part number for the "normal" 8-rib supercharger drive pulley and the "high-traction" pulleys...

The high traction category doesn't have a 3.4 option... Otherwise, I'd go back to the 8lb serp side and do the 3.4-3.0 jackshaft-SC on the SC side like Topz

I was thinking of keeping the 9lb serp side and ordering two 3.15 (is this what y'all are calling the 3.2?) high traction to replace the SC side.

And to answer the question, you might as well replace the belt, knowing that you've worn the belt a bit and having everything apart.

Originally Posted by redondoaveb

I'm replacing my jackshaft pulley with the 2A038 high traction 3.15 as they don't make a 3.20. I don't know what manufacturer the stock jackshaft pulley is but it's not a Vortech. Also, if you change your jackshaft pulley to the Vortech, you need to add a spacer to the sc shaft as the Vortech pulley is a different offset than the stock 3.20. 928 Motorsports makes a high traction 3.25 that looks pretty interesting but it's $180.00.

I already have a new belt ordered.

Originally Posted by turtle64b

If I get a pair and replace both the jackshaft and the SC pulleys with the 3.15 (or smaller) High Traction from Vortech, won't the offsets match?

Originally Posted by redondoaveb

Nope. I installed a Vortech 2.85 sc pulley and it lines up fine with the stock jackshaft pulley. When I change my jackshaft to the high traction Vortech I'll have to add the spacer. FYI, 928 Motorsports carries the spacer, it may need to cut to length. Also, you'll have to use a longer bolt on the Vortech jackshaft pulley as it's wider than the stock pulley.

Stillen didn't use a Vortech pulley for the jackshaft, it looks like a Magnuson but I'm not positive.

Originally Posted by turtle64b

Interesting...

Thanks for the info!!!

I'm not sure my tranny is ready for that much boost haha. Or me ready to spin the Vortech bearings that fast haha. But since I'm swapping out the pulleys anyways, I might go with the 3.15 jackshaft and maybe the 3.0 SC...

Per the Vortech calculator, I'm at 55.6k RPM now (with the serp-side 9lb pulley). Bumping down to the 3.0 while keeping the 3.15 ~stock size jackshaft would put me at ~58.4. Strongly debating stepping down the size since it'll keep me in the limits of the tranny.

If I had the 928 Supervortech upgrade, I'd go 3.47 jackshaft and 2.85 SC, which would spin it ~68k!

Did you just source the longer bolt from Lowe's or similar? Did you increase the SC-side idler?

Thanks again!!