Thread: What would i have to do to safely run a 3.0 inch pulley?

Originally Posted by John_Shughart

Umm title says it all. I have a 3.4 inch and wondering what i need to do to reduce the pulley size any more than that and what the dangers might be having it at 3"

I think GTP SE is right on. From what I've gathered, you will at least need a fullsized intercooler and rockers (more likely a cam) for a 3" pulley. You would really want headers at that point, as that is about as far as a downpipe and PEMs or a Plog will go. A cam would probably make it easier. Intake side, you would benefit from a ported blower and a throttle body upgrade. Then a good tune and a new tranny. But it sounds like you are falling for the trap of trying to hit a certain pulley size. The pulley size should be low on the priorities. Get your supporting mods together, tune for ideal A/F and timing and only go as small on the pulley as you can without compromise to your tune.

The only time I was able to run that small of a pulley knock free, was when I had 1.9 rockers wizaired, headers, stage 3 IC, 180* tstat, hogan DP with hiflo cat, Lightning injectors, fp rewire, allt rewire, stage 1 vboost, and a custom tune. I was still on the edge of knocking, but those were the mods I had when running a 3.0 pulley.