I'm looking at going for pulleys, see the sig. I was wondering what your guys thought on them were and which ones you like. I konw that they are not all the same so what do you like?

------------------
--Spyder--

1992 Camaro RS
LO3, T-56,centerforce clutch, ported and polished heads, Edelbrock Performer Intake, 14X3 Open Element w/ K&N, hiflow cats with two pipes going back, AC delete, SMOG delete, alu drive shaft, 3.73 posi, 170 stat w/ fan switch, STB, Subframe connectors, KYB AGX, Eagle GSC, and poly bushings.

1982 Z-28
327ci CSB, Turbo 350

 

I've got the Hypertech ones. Save your money for stuff that will make a difference.

-Mark W.
'88 SC Camaro w/ 305 TBI

 

Pulley gains depend a lot on how high you rev the engine. BAck when I was doing "super-tunes" (80's and 90's),, pulleys on a L98 TPI was worth .09 - .15 seconds,, depending on existing mods.

 

Hey thanks guys for your input. I don't know I don't really think that hypertech knows quite what to do, there chips suck and from what it sounds like so do there pulleys.

Anyone else have any opions on them? I want as many people as possable. Thanks!!

 

I have the march pully on my lt1 and I didn't notice any gain from it. If I were you I would save my money and put it into something more substantual.

just my opinion

------------------
97 formula w/6speed,cags skipshift eleminator, hurst billet pro shifter, 30#injectors,adjustiable fuel presure regulator,Moroso cold air induction,ported mass air sensor,accell300+ ignition box, accell 9000 wires, bosch platnum4 plugs,flomaster crossflow muffler,Lingenfiter 52mm throttle body,TPIS L98 SuperProfile cam,Crane 1:6 full roller rockers,Edelbrock subframe connectors,Edelbrock strut tower brace.

Other car is a 89 GTA w/700r4w/stage 2 shift kit, corvette servo, B&M mega shifter, TPIS bigmouth intake, TPIS large tube runners, TPIS 52mm throttle body,Edelbrock ported centerbolt heads,LT1 24# injectors,GMPP LT4 hotcam,CompCams Pro magnum roller rockers,Edelbrock headers, flowmaster crossflow muffler,MSD 6A, accell coil, bosch platnum plugs, this car is currently under rebuild and restoration.

 

Yeah, I wouldn't get them, but if u do only get the crank pulley. When others had them all on their cars, they had lots of BS with them and took them off and put the other 1's on again.

------------------
89 RS

Looking For:
87 IROC-Z28 350 TPI

 

I've got an underdrive crank pulley on my car, only because the original was bent up. It didn't seem to make any difference for me.
I actually had some trouble with the alternator belt getting too close to the lower-left water pump bolt which is threaded off the bolt head for the smog pump bracket mount. Since the pulley is smaller, it brought the belt in closer to this part. I had to find another bolt with a flat head.
There's better things available to increase performance.

------------------
DR Stevens
1984 Trans Am 305HO L69
1991 Firebird 305 L03

 

I have March's Power and Amp pulleys and I gained about a car length with them.

------------------
1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

 

Humm thanks much guys, I'm pulling my motor this fall but am just looking for something to do between now and then. I don't have'em and was kinda wondering if it was worth it. I am redoing all my ignition tonight to it should be fun... Thanks!

 

Sypder I have the power and amp series as well and they felt like they helped me out a little. I could feel it pull a little harder. It is one of those little things that will always help you out. I also have no problems with charging at all. I have the 2 piece btw.

 

They are worth it if you engine runs at a higher rpm i.e. idle 1200 up. It can save the bearings in your waterpump,Air cond. compressor,smog pump, and alt. They are especially necessary if your running 3.42-3.73 gears and a 2800 stall convertor.