Is this a serpentine system? Do they really give you back that many ponies? How much of a pain in the a** is it to convert?

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• 1984 Trans Am 305 H.O., M5, Posi 3.73, Q-Jet 4bbl. 4-wheel Disk Brakes
  160 Degree thermostat, Mobil 1 Synthetic fluids.
  

 

They make ones for V-belt set ups too. What they are is just a set of smaller pullies (usually crank and alternator, sometimes water pump) and they turn slower and take less horsepower to turn. My dad told me that it takes about 8 horsepower to drive each OE belt, with the smaller pullies, it takes less.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission

Current Mods: Edelbrock TES Headers, Hooker Cat-Back System, Performance Resource Chip, 160* Thermostat, Accel 8.8mm Ignition Wires, K&N high flow air filters, gutted air box, gutted MAF sensor, Throttle Body Coolant By-Pass, Homemade Ram-Air, Falken ZIEX Z-Rated Tires.

1/4 mile times without chip:
Best ET: 15.7 @ 89MPH
Best Corrected ET: 14.5 @ 96MPH

 

Also, you want to make sure that the alt pulley and the crank pulley are the same ratio size as OEM (ex: if OEM is alt. = 5", crank = 10". Then aftermarkets should be alt. = 4" and crank = 8"). Otherwise you could have charging problems.

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George P. Lara
1984 Z28 High Output
Proud Member of SCFB
V6 T5 For Sale

 

I got a Mach 25% underdrive crank pulley and it gave me a good amount more ooomph above 3000 rpms. Since I upgraded the alt a few years back, I don't have any charging problems. Besides, how long do you really spend under 1000 rpms?

My main problem is that I now have cooling problems. I can't be positive if it is simply because of the pulley or if I would have had problems in the summer regardless (installed engine in Dec). My thoughts are that even with a 160C thermostat, high volume water pump, and dual electric fans, I still need to go with a bigger radiator. There must be a difference between the stock LG4 radiator and what came on later models...

BTW- It is a simple mod. The biggest pita was to loosen and re-tighten the belts...

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock... all the suspension stuff... 9-bolt posi disk is in... K&N filter... 93 octane...

I got the GO... I need the SHOW... Interior is next!