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Safe Limit Boost on Stock Engine

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Old Dec 21, 2006 | 11:16 PM
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Default Safe Limit Boost on Stock Engine

Safe Limit with Boost
I would like to know what are or could be a safe limit to a stock bottom end... I'm looking into a turbo setup..
I'm heard everything from 500rwhp-600rwhp and then some..

I'm planning on changing the head to lower compression around 9.5-9.9..
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Old Dec 21, 2006 | 11:23 PM
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There is a poll on this same page where people have listed how much power they have on a stock bottom end. I mean, damn, it's on the same page, you don't even have to search.
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Old Dec 22, 2006 | 01:06 AM
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Originally Posted by gametech
There is a poll on this same page where people have listed how much power they have on a stock bottom end. I mean, damn, it's on the same page, you don't even have to search.
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Old Dec 22, 2006 | 03:09 PM
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I would like to hear from the Turbo folks...
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Old Dec 22, 2006 | 03:18 PM
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Many turbo folks to hear from on that thread... Have you taken a gander at all?
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Old Dec 22, 2006 | 03:30 PM
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you said, taken a gander... hahahaha
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Old Dec 22, 2006 | 04:53 PM
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I'm probably pushing it now at 550+RWHP so I just had an alky kit installed, high performance fuel pump and tranny cooler (to help the A4 live). I wouldn't go any higher than the 7psi that I'm currently running until I'm prepared to go forged. My faith is in the hands of the excellent tune done by The Vette Doctors of Amityville, NY. We'll see what happens.
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Old Dec 23, 2006 | 08:22 PM
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Pewtavert- How long or miles have you been running with your set-up prior to the alky kit?
I see you're still running normal compression??

Thanks!
ps do you have any 1/4 mile times...
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Old Dec 23, 2006 | 09:54 PM
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I have been pushing 10 psi for a while now on a conservative tune. No meth, all stock.
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Old Dec 23, 2006 | 11:51 PM
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Originally Posted by Urban Legend
I have been pushing 10 psi for a while now on a conservative tune. No meth, all stock.
what did you do to get 10psi out of the P1SC??? thanks
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Old Dec 24, 2006 | 01:28 AM
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Originally Posted by Rickys S/C Z28
what did you do to get 10psi out of the P1SC??? thanks
Try a pulley change
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Old Dec 24, 2006 | 10:37 AM
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SDCE set up and 3.4 pulley.
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Old Dec 24, 2006 | 10:42 AM
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a stock block at around 7-8 lbs with boost will last forever.

the weak link is the piston ringlands. I wonder if we had stronger cast pistons how much boost we could have gotten out of these motors with no other mods done.
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Old Dec 24, 2006 | 12:03 PM
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Yup... Nobody's ever busted their stock conrods that I've heard of.

In fact, I believe I've read of one or two BUDGET builds where all they did to the bottom end was change the pistons... CR is still an issue, but for ~10 psi, this would be pretty ******* bulletproof.
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Old Dec 24, 2006 | 12:10 PM
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Originally Posted by jz06man
Pewtavert- How long or miles have you been running with your set-up prior to the alky kit?
I see you're still running normal compression??

Thanks!
ps do you have any 1/4 mile times...
Actually my Procharger was just installed in September. I was already making close to 400 RWHP on a 6 year old Vette Doctors heads/cam package. With 3.90 gears and a 3200 stall I felt it best to have the alky installed for safety since the RPM's are up there as it is with my setup. Also I'm sure that compression is higher since this car was modified as a NA car from the beginning.
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