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04-13-2009
I finally got the GTP back up and running after nearly 3 months of waiting and building. I'm pretty sure I can't safely run the 3.1 I ran before, since I now have a 9.5:1 CR. I'd like some ideas of where to get started on sizes while I'm breaking the motor in. 3.4 is what I had before the 3.1 and I'm considering going back to that size, but I'm not so sure that will be safe, either. Anyone out there have any experience with a similar setup as mine?
04-13-2009
If you're just trying to break the motor in then I would use whatever pulley you can. Just not under a 3.0. And don't give it anything over 1/2 throttle and you should be fine. As for performance wise I would think you could run a 3.25 as long as you're tune is pretty decent considering the mods you have
Oh....Forgot to say.... ABOUT TIME THAT THING IS RUNNING!!
04-13-2009
probably need an intercooler to run that, i sell them
i have an l36 bottom end also, it was alot easier finding them in good condition at the junkyard when i did mine, and it was cheap. i run a 3.4 right now, have headers, and as far as boost goes, im gonna need to throw my ic on if i want to go lower.
so i would say an intercooler would be a good next mod.
04-13-2009
Go up to a 3.4 or even a 3.6 if you can. That higher CR is like having a few sizes smaller pulley.
04-13-2009
the 3.4 should be fine for whatever youre doing. when you start out your tuning, just start out with running like 10* of timing WOT to make sure it doesnt knock.
04-13-2009
I don't have any other modular pulleys, so I'll be buying whatever I decide to go with. I do have a buddy about a half hour away with a 3.4 he's willing to let me borrow for testing purposes, so I'll be testing with that later tonight.
04-13-2009
I know... It's been waaayyyy too long without my car.Originally Posted by TDCRacing
I'm actually considering getting one of your intercoolers. I have a few bills to pay off, first.probably need an intercooler to run that, i sell them
04-15-2009
good to see you got her running =]
hogan 3inch DP u bend delete ,180*tstat, autolite 104s, LED interior, 4" FWI, 2000watt system, bullitt rims, zzp pistons, pems, alt rewire, thrush muffs, 3.4 zzp mps, transgo shift kit, triple edge performance trans. autometer triple pod :SOON: urlosn HPT PCM tune, HEADERS, 1.9's
04-15-2009
i have a 3.3 i can send you if oyu need. i also have a whole stack of those thing so when you get it all sorted, come talk to me and we can go play
04-15-2009
Congrats man...I just need a new rear head and mine is good to run again too...damn stickin' valves
04-16-2009
Got some scanning/tuning done the other night with the 3.4 and with a 10*WOT timing, had no knock. I didn't have time to add timing and want to keep my heavy throttle driving at a minimum until the motor is broken in real good. I've already gone 200 miles with the 3.1 on it with no knock, but I've kept the throttle under 75%.
Justin, you've got a PM.
Last edited by DanGTP; 04-16-2009 at 07:28 PM.
04-16-2009
good work. it always works out to start out with low timing and then work your way up once you have the fueling in check.
04-16-2009
Well, as you can see in my mod list, I skipped out on the 42.5's I was originally intending on getting due to lack of funds. I may end up going with a larger pulley just to be safe fuel-wise, then dropping down when I get the bigger injectors.
04-16-2009
youre good until at least a 3.2 with stock injectors, if not down to a 3.0 ish. just watch your IPWs. if they are anything near 22.xx WOT then youre getting close to static, but so long as it isnt knocking then who cares, right?
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