Underdrive Pulley?

[02bluez28]

Is this a worthy bolt on? what do you guys think.

Anyone notice a difference from just replacing the crank pulley?

[BURNEM]

there is other things that I would do before pulley. I did it as a final bolt on just to get as much as I could out of the car. Not really impressed on my end.

[Y2KPewterSS]

It doesn't show much if any peak HP gains, but I have seen gains of 10 HP under the curve. Its a good mod to do when you are doing a cam swap. Lots of better mods out there though.

[02bluez28]

It doesn't show much if any peak HP gains, but I have seen gains of 10 HP under the curve. Its a good mod to do when you are doing a cam swap. Lots of better mods out there though.

Well... im lookin for the cheaper stuff right now, im kinda at a loss though. I got my Air lid and K+N, Borlamouth catback, Ported polished TB and coolant bypass, Soon to be headers... what am I missing?

[Y2KPewterSS]

What tranny do you have? Headers and suspension mods are next in line for you unless you have an auto tranny, then you want to get a stall.

[02bluez28]

What tranny do you have? Headers and suspension mods are next in line for you unless you have an auto tranny, then you want to get a stall.

Yeah im auto. I was looking into a stall, I just dont see how I would pick up any performance beyond first gear...

[Y2KPewterSS]

Yeah im auto. I was looking into a stall, I just dont see how I would pick up any performance beyond first gear...

Stalls keep you in the power band. Its the best mod there is for LS1/4l60E combos. Most people shave half a second off their ETs with a stall.

[02bluez28]

Stalls keep you in the power band. Its the best mod there is for LS1/4l60E combos. Most people shave half a second off their ETs with a stall.

Whats size stall recomended for a DD?

Thx for the help

[35thAnniZ28]

Whats size stall recomended for a DD?

Thx for the help

exactly what i would like to know

[Y2KPewterSS]

Whats size stall recomended for a DD?

Thx for the help

3500 is a great DD stall. 3200, 3400, 3600 would all be good for DD as well.

[Silver Streak]

Yep.. 3600 here... Love it.

[davered00ss]

I gained 14rwhp & 12rwtq with the SLP (March, Powerdyne) underdrive pully. I would say it's a worth wile mod

[BURNEM]

I had a midwest 3400 switched to a yank ss4000 loved the yank. When i went to a 400 trans I also used a yank 4000. Converters are also lighter than stock makeing less rotating mass on the top end. It levels the playing field on a roll with the M6 cars. By staying in power band, with rev extention is also pulls harder and faster through the shifts. My tach doesn't drop below 5500 the whole 1/4 mile.

[Ripper415]

Well... im lookin for the cheaper stuff right now, im kinda at a loss though. I got my Air lid and K+N, Borlamouth catback, Ported polished TB and coolant bypass, Soon to be headers... what am I missing?

im kinda in the same boat as you (except i've got a manual tranny). i got a lid, ssra, ported tb, and just bought stainless lt's and a stainless ory. i know for certain that i'll never put a new cam in my car so basically the pulley is all i've got left. the funny thing is that i used to at least wait until one mod was completed before thinking about another. my lt's/ory wont be installed for quite some time and i'm already price shopping for ud pulleys lol.

[Ripper415]

I gained 14rwhp & 12rwtq with the SLP (March, Powerdyne) underdrive pully. I would say it's a worth wile mod

that doesnt seem right. the absolute most i've ever heard of was like 10 rwhp for a pulley. most people say around 8.

[danziger]

I've had my ASP crank pulley on since 2001 and think it's a worthwhile mod. I didn't dyno it separately, but the engine seemed to rev a little quicker after the install. The size/weight difference between stock/ASP pulleys was insane!

[davered00ss]

that doesnt seem right. the absolute most i've ever heard of was like 10 rwhp for a pulley. most people say around 8.

It was done on my car after the cam install, so gains might be higher due to that. But still 8-10rwhp is a worthwhile mod.

[va2001ss]

I did dyno after the SLP pulley install but I also added a Katech TB. Combined the two mods gave me 12 RWHP and 14 RWTQ.

[davered00ss]

I gained nothing from the TSP Ported TB.