thebernsZ28

I know this has been asked a hundred times but the SEARCH function is fucked up.

Are underdrive and alternator pulley really worth any gains? Or should I waist my money on something else.

Ferocity02

iTrader: (60)

Yes they are worth it. They usually are good for about 10rwhp. Even if you don't feel any gain, you will for sure notice that the engine revs faster. With your mods, an underdrive pulley is a good next mod.

Joker # 9

iTrader: (1)

I noticed the motor reving faster....I jump into another LS1 without a pulley and it feels like it takes forever to get to redline.

thebernsZ28

I don't care if I feel it, I just want to see the gains on a time slip.

Will it affect anything adversly in hot weather?

ZR2877

If you plan on doing a Cam soon just wait till you put the cam in to do it. I would say get the pulley. I can't tell you how much it helps cause I did Cam,Pulley, and Intake all at one time then Ported TB.

Judd

iTrader: (1)

I noticed more of a "seat of the pants" feel from my UD pulley than I did from my lid. Good mod that I would do again {can't say that about all my mods}.

d james

When you guys say you did the pulley mode, are you saying you did just the crank or crank and alternator together? Also aren't these pullies pretty expensive? I thought I read they were like 250 bucks, which seems like alot of money.

Viper

iTrader: (6)

$250 for mods is nothing in the LS1 world.

Ron78Z&01SS

Check out this thread.......

https://ls1tech.com/forums/generation-iii-external-engine/276941-pulleys.html

Judd

iTrader: (1)

I did only the crank pulley.

thebernsZ28

Ok, looks like my next mod will be the crank and alt. pulley.
Thanks

Ferocity02

iTrader: (60)

I will be selling my ASP Pulley soon since I am going FI, and I need to use the stocker

bad0211secws6

iTrader: (6)

march also makes a underdrive pulley which is fluid dampered this makes life easier on the bearings it is 25% same as the asp but it is heavier.i bought it for better bearing life and march says they are dyno proven 12.5 hp increase i paid 195.00 from summit
and i bought my belts for 36.00 they were the gates belts

thebernsZ28

How much?

Ferocity02

iTrader: (60)

Haha... somone already jumped on it. sorry

o2haWK

Well it will make go through your RPMs quicker which obviously makes your ET better. I bet if you put Aluminum flywheel, carbonfiber Driveshaft, and ASP pulley with some 4:11...you would go through your rpm's a HELL of alot faster which is what you want for 1/4 mile..