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Pulley sizes?

P

PrixieGirl69

New member
Hey I have a pretty much stock 1999 Pontiac Grand Prix and wanted to know if I could drop down the pulley size without crazy modifications

Mods
Ram air intake
New plugs and wires
Resonator delete
 


Need some exhaust work like downpipe, headers etc. It's better to have more then enough mods to drop pulleys safely then not enough mods.
 
3.8 - Stock, 91 Octane
3.6 - Plog/Headers, DP, Tune, 91 Octane
3.4 - Plog/Headers, DP, Dyno Tune, 93 Octane
3.2 - Plog/Headers, DP, Dyno Tune, Rockers/Cam, 93 Octane
3.0 - Plog/Headers, DP, Dyno Tune, Rockers/Cam, Intercooler
2.8 or Smalelr - Plog/Headers, DP, Dyno Tune, Cam, Full stack Intercooler, 93 Octane

That list should be about right and pretty safe. I ran E85 in my car so I was on a 3.2 pulley with only headers and a tune :P Now I got that snail power!
 


slick2500 said:
With the mods she has currently she might be able to go with a 3.6. Remember each car is different.
Click to expand...
Tis true. I have no knock on mine and its stock other than the ZZP downpipe. I am going to get an Overkill tune and drop to a 3.4" and measure for knock again. As I said, a ZZP downpipe, plugs, good tune, 180° thermostat, and no knock you can run a 3.4" as long as there is still no knock. I do agree, with her current mods I would probably not drop below a 3.6" pulley. Maybe a 3.5" with a tune and plugs.
 


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