redbird555

iTrader: (14)

The best underdrive is ati no doubt. It offers the best dampening and there is a reason its used in world class racing. You can get blemished ones from ati direct if you call for a large discount otherwise a sponsor can get them for you also. They are expensive regualrly priced but as I said they are the best. They will provide the same hp gains as a 25% underdrive but they are only 10% underdrive and wont slow the accessories down much at all

ISU-WS6

Its too bad that they are so expensive. I would much rather put the few hundreds that a pulley costs towards either head porting or a cam.

ULTIMATEORANGESS

iTrader: (4)

powerbond pullies is a good option imo and not expensive.

ISU-WS6

Is the ATI the only UD that has the harmonic balancer?

dr_whigham

iTrader: (49)

Powerbond is a great balancer in my opinion. I had one on the Camaro that routinely saw 6800 and it was perfectly fine.

ISU-WS6

Bump.

redbird555

iTrader: (14)

Others have it iirc but it's greatly diminished since they're so small so the idea is that they don't do the job efficiently. However they haven't made motors fail by that so the opinions vary. That ati is only 10% so it keeps and dampens Ben better than factory all while making the same hp

ISU-WS6

Bump.

XDeath

iTrader: (2)

Imo, get the ATI pulley. When it comes to parts that can have a chain effect on other parts, I'd get the best brand, or at least a proven brand. Not saying powerbond isn't great, but if theres better, then I'd rather be patient and save for it instead of kicking yourself in the future.

Also, regarding the 1 7/8 primary, you're not "losing" power because you have stock cubes, you're still gaining power. A top brand 1 7/8 will always net you more power over a top brand or similar 1 3/4 (notice i said a top brand, not ebay). Its just the fact that torque numbers for a stock cubed motor with a 1 3/4 will be a bit more at about 3000 rpm but ultimately 1 7/8 will have more tq and hp after.

Here's a link to a comparison: https://ls1tech.com/forums/generatio...o-results.html

ISU-WS6

Bump. Still looking for any input on the overall setup. Anything else to consider?