Stupid question: 12# pulley safe?
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From: Fort Worth
Stupid question: 12# pulley safe? I have just ordered a 12# pulley for my procharger. I have a stock 6.0 bottom end and 9.4 compression. How long do think it will last? How much of a power increase will I see? I am currently at a 11.2-11.7 air fuel ratio. I think it will last a couple of months anyway.
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From: Columbia, MD
Re: Stupid question: 12# pulley safe? You might want to check with Harlan. I think he ran a mix of toulene and 93 Octane to run that much boost on the street without blowing up the stock bottom. But that's really livin' on the edge, bro. I'm only running 8PSI at 6600RPM, and I always think about my bank balance twice before I drop the hammer to the floor.
Now once I get it back to $5K, then I might join you with the 12PSI pulley.
Now once I get it back to $5K, then I might join you with the 12PSI pulley.
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From: Fort Worth
Re: Stupid question: 12# pulley safe? I will not be spinning the motor that hard. I will probably shift at 5,800. The pulley will make 12# at 6,000. How much of a power difference will I see?
Another stupid question. What do you mean bank balance?
Another stupid question. What do you mean bank balance?
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From: Chi-Town, IL
Re: Stupid question: 12# pulley safe? Bank Balance as in, foot goes to the floor, dollars fly out the window...
If you got a setup thats tuned right it will last for a while, I can't see anything stock though lasting w/12psi, but you do have the advantage of the iron block...not sure how stong those stock bottom ends are though..
If you got a setup thats tuned right it will last for a while, I can't see anything stock though lasting w/12psi, but you do have the advantage of the iron block...not sure how stong those stock bottom ends are though..
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From: Fort Worth
Re: Stupid question: 12# pulley safe? Bank balance, I am such a f#cking tard. 
I though it was something like banks of cylinders.
I just need a couple of months until my other motor is done. Plus this will give me more tuning knowledge. Any clue of power gain?
I though it was something like banks of cylinders. I just need a couple of months until my other motor is done. Plus this will give me more tuning knowledge. Any clue of power gain?
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From: Chi-Town, IL
Re: Stupid question: 12# pulley safe? 12psi will get you a lot of power..
My new motor is a 6.0L block honed .40" w/a stock crank for 372c.i. going to run 12psi, hoping for about 600rwhp on that, and more w/more PSI...
12psi will get you a NOTICEABLE power increase....
I also got side tracked when I first read the post, thought bank balance as in 02's, but I then read the statement over again...
My new motor is a 6.0L block honed .40" w/a stock crank for 372c.i. going to run 12psi, hoping for about 600rwhp on that, and more w/more PSI...
12psi will get you a NOTICEABLE power increase....
I also got side tracked when I first read the post, thought bank balance as in 02's, but I then read the statement over again...
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From: Raleigh, NC
Re: Stupid question: 12# pulley safe? When I had 12 PSI, then 10 PSI with the headers, I had to put some TORCO Racing Additive or mix 100 Octane to be able to do WOTs.
I drove it around on 93 octane, but I go an instant 8 PSI when I floored it and the knock would start shortly after that.
I drove it around on 93 octane, but I go an instant 8 PSI when I floored it and the knock would start shortly after that.
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From: toronto
Re: Stupid question: 12# pulley safe? Well gimmie a few days I'll let you know how the 3.6" pulley works out for me
with my stock bottom end I'm running sunoco ultra 94 in the truck an have been able to get away with increasing the timing 4 degrees with 9.5 psi so i'm planning on lowering the Shift points down some and lowering the rev limiter to see how the truck like the smaller pulley
4 degrees more advance and no pinging or KR on my truck had to advance it 8 degrees to hear a little but still didn't show any on the tech 2
Out of the hole so far the truck hits 3-5 psi at 3000rpms or so
I'll post when i can get some more data and runs in
jim
with my stock bottom end I'm running sunoco ultra 94 in the truck an have been able to get away with increasing the timing 4 degrees with 9.5 psi so i'm planning on lowering the Shift points down some and lowering the rev limiter to see how the truck like the smaller pulley
4 degrees more advance and no pinging or KR on my truck had to advance it 8 degrees to hear a little but still didn't show any on the tech 2
Out of the hole so far the truck hits 3-5 psi at 3000rpms or so
I'll post when i can get some more data and runs in
jim
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From: Fort Worth
Re: Stupid question: 12# pulley safe? Black LS1 T/A what was your total timing at the time? I have a little less compression than you so it might not be so bad. I have a Tech2, that updates very fast, and plan to watch my timing and knock retard. I love the hell out of your car but, you need some injectors. I can't wait to see what it will do with fuel. 
GMC SKI please let me know how it works out for you. It will be another week before my pulley arrives and another week before I have the nuts to install it. How many psi is the pulley you ordered?
GMC SKI please let me know how it works out for you. It will be another week before my pulley arrives and another week before I have the nuts to install it. How many psi is the pulley you ordered?
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From: Anch., Alaska
Re: Stupid question: 12# pulley safe? GMCSKI is getting good gasoline! I must be gettign crap, because I am seeing KR at 5200 Rpms. We make the freakin gas here, and I can only get 91 or 92 octane 
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From: Raleigh, NC
Re: Stupid question: 12# pulley safe? Sorry I missed your question earlier.
Without verifying by checking date by file, I believe I was running 22 degrees from 4000 RPMs on up.
I ran that for a long time until I understood how to bump my timing up in places and where to drop it.
Without verifying by checking date by file, I believe I was running 22 degrees from 4000 RPMs on up.
I ran that for a long time until I understood how to bump my timing up in places and where to drop it.
Re: Stupid question: 12# pulley safe?
and another week before I have the nuts to install it.
Couldn't resist.