hepcatws6

I want to get a set of underdrive pulleys. Anyone have any advice on a brand and price range? I want a good set for cheap. Thanks in advance.

LS1LT1

iTrader: (16)

ASP, around $230.00 with required belts, check the board sponsors over there ---> to order.
You mention you want a 'set' but the underdrive pulley is basically just one piece, unless you get the alternator pulley as well.
I would go with just the underdrive pulley itself personally though.

Another_User

March runs about the same. No need for the alternator pulley unless you are running a sound system or something. My battery gets full charge with no problems, and i watch that alternator gauge like a hawk. Plus the March pulley is fluid dampened.

cyphur

iTrader: (10)

also try speed inc's pulley. $189.

however, something to note, is that "best" and "cheap" usually aren't used together successfully in the LS1 performance world(or anywhere else for that matter).

BriancWS6

iTrader: (18)

March UD pulley here, I also have a 10'' sub in the back and NO charging problems, I still have the stock alternator pulley also.

zchgla

Whats the difference in March and ASP? Are they the same design? Is there anything signifigant in the design or anything else for that matter that makes it better?

Another_User

March is fluid dampened. Big difference.

P Mack

iTrader: (6)

I got a march from SDPC for 175, but it was on sale. Pretty cheap if you ask me.

hepcatws6

So what I'm seeing is go with the fluid dampened March & no need for the alternator pulley (I am not running a sound system, nor do I have any plans to.) Thanks, guys. If you have any other advice let me know.

ChrisJ

Im running a SLP pulley on my car... I got tired of waiting for the ASP being on backorder at the time, and SpeedInc told me SLP had re-designed the pulley from the older ones that had a lot of problems, so I decided to give it a try and so far Im very happy with it.. Seat of the pants car seems to be a little faster, and I get noticeable increase in wheelspin in 1st and shifting into 2nd, so I think it did have some gains...Havent been to dyno to see if it actually gained any power, but the pulley combined with cooler weather (I didnt go to the track much during the hotter months) recently gave me a consistent 2 tenths lower ET and 3 mph increase with similar 60' times.

zchgla

so is fluid dampened better or worse...or what?

Worm

iTrader: (2)

Yeah, why would fluid dampened be any better?

Another_User

Fluid dampened is better because it dampens your engines harmonics better, making it better balanced, and reducing the possibility of harmfully vibrations and false knock retard.

zchgla

So then why dosent everyone buy March pullies instead of ASP?

Another_User

Preference. Doubt. Some people feel ASP makes a better product because they have been making LS1 pulleys longer. I feel March does a better job because almost all they make is pulleys.

jts98za4

March pulleys for the LS1 just came out not too long ago. I have ASP crank and underdrive alternator and have no problem. The volts at idle do drop a little more but no problems. I think pulleys are a great mod whichever way you go because they DO give hp gains, they're cheap, and easy to install. I wish every mod was as easy!

LS1LT1

iTrader: (16)

Not that it matters all that much but the ASP is lighter than the March, and I'm a FREAK when it comes to saving weight, especially off the nose.

1BadMoFo

iTrader: (1)

its interesting that everyone agrees (but one guy it looks like) that we don't need the corresponding alternator pulley...?

HumpinSS

iTrader: (1)

The weight is close to the middle of the hub, thus effectively reducing rotating mass as opposed to it being at the hubs edges....

LS1Maniac

Anytime you can take weight of things that spin it's generaly a good thing . I don't see any real need for the alternator pulley if you're just using the stock radio/accessories.