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Anyone pulley down to a 3.1 with stock longblock and if so, how long it been holding together? Thinking about pulleying down from the 3.3 i got now. Am I crazy or think it will hold for awhile?
 

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I had the 3.1 pulley on mine for over 10k miles before my motor popped but that happend because my meth bottle went empty during a 3rd to 4th gear pull. That was my fault not the engines. As long as the tune is good, I don't see a problem if you are intercooled or meth injected (with something in the bottle).
 

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I had the 3.1 pulley on mine for over 10k miles before my motor popped but that happend because my meth bottle went empty during a 3rd to 4th gear pull. That was my fault not the engines. As long as the tune is good, I don't see a problem if you are intercooled or meth injected (with something in the bottle).
You shouldnt need meth at those power levels. As far as i can tell so far a rod broke which is due to power not tune. I think anything over 400 is pushing it and whether you last or not seems to be hit or miss. I wouldnt up the power til you have the money to build a new block if it blows.
 

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I used meth because I didn't want to do an i/c at the time. A rod could still blow due to detonation. Anything over 400 is pushing it although many people have done it for long periods of time with a good tune. I agree you shouldn't push it past 400-450 unless you are prepared to do engine work just in case.
 

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I'm with this chump ^^^^ 3.0 pulley 14/15 lbs on the gauge, so far so good (fingers crossed)
 

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I run 12-13 lbs on a 3.1 RR pulley thru an icevex interecooler,16 deg of timing.This in a blow thru set-up. 421 rwhp,I have been running it like this for about 5000 miles. I also ran it at 9 lbs un-intercooled before that for about 5000 miles.
 

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I went about 3k miles (full summer of racing) but I think my bottom end was a little weak to begin with. I lost cylinder 8. I was only making 10lbs with my I/C but I was bursting at 436rw with a bunch of timing. If you've got a healthy longblock and i/c or meth then you'll be ok if you have a good tuner.
 

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I've had my 3.12" pulley on my 00GT for years now. Just make sure you have a good tune and don't beat on the car every day ;-).
 

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lol, i'd like to see you not beat on your car everyday chris.
 
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