W30post Posted June 26, 2009 Report Share Posted June 26, 2009 My 04 is itching for a new pulley. I'm undecided on the size. I think the 3.4 is for me but what is the 3.25 going to do for a mostly stock 04 car. Can you get away with no PCM changes on the 3.4 pulley? Not trying to be lazy just wanting to know what to expect. Will plugs have to change for the 3.4 pulley? I have another car that is fun. This one just needs a little more. Quote Link to comment Share on other sites More sharing options...
95 vert Posted June 26, 2009 Report Share Posted June 26, 2009 Check out the tech articles on ZZP's website. Pretty informative. Quote Link to comment Share on other sites More sharing options...
Euro Posted June 26, 2009 Report Share Posted June 26, 2009 http://www.wbodystore.com/grandprix/What-size-pulley-can-I-run-a-23.html Here's a good arctile from wbody store. This should help ya out! Quote Link to comment Share on other sites More sharing options...
jeremy Posted June 26, 2009 Report Share Posted June 26, 2009 My 04 is itching for a new pulley. I'm undecided on the size. I think the 3.4 is for me but what is the 3.25 going to do for a mostly stock 04 car. Can you get away with no PCM changes on the 3.4 pulley? Not trying to be lazy just wanting to know what to expect. Will plugs have to change for the 3.4 pulley? I have another car that is fun. This one just needs a little more. do some research before just throwing on a smaller pulley....in some cases dropping a pulley size without any mods can cause so much KR that you actually would end up with less HP Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted June 26, 2009 Report Share Posted June 26, 2009 do intake, then u bend delete, then t-stat, then get a KR scanner, get a 3.4 have it tuned. I would stay with a 3.5 to be safe. Dont just slap a pully on there or you Wont have a car. Quote Link to comment Share on other sites More sharing options...
sl3196 Posted June 26, 2009 Report Share Posted June 26, 2009 do intake, then u bend delete, then t-stat, then get a KR scanner, get a 3.4 have it tuned. I would stay with a 3.5 to be safe. Dont just slap a pully on there or you Wont have a car. Don't even mess with the u-bend and just do a whole new downpipe. The gains from just the u bend aren't worth it. Quote Link to comment Share on other sites More sharing options...
W30post Posted June 26, 2009 Author Report Share Posted June 26, 2009 I've been reading around. I understand what you guys are saying here. Not real sure I want to put this much into a car I should just drive. Would be fun but my foot will be heavier on this combo. Quote Link to comment Share on other sites More sharing options...
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