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Jan 23, 2006 | 11:29 PM

boostedtransam

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max psi to run...

What is the max psi I can run safely without spraying meth?? I have a 402 iron block, sts with a t-70, and a intercooler. Does 10 or 11psi sound about right??

Jan 23, 2006 | 11:33 PM

y2khawk

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on what fuel?

Jan 24, 2006 | 12:24 AM

boostedtransam

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93 oct. pump gas. is this alright

Jan 24, 2006 | 12:28 AM

y2khawk

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compression?

Jan 24, 2006 | 12:29 AM

boostedtransam

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8 to 1

Jan 24, 2006 | 12:31 AM

boostedtransam

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it is a low compression motor and its built. af will be @ 11.2-11.8

Jan 24, 2006 | 12:32 AM

bluecamaroz28

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Quote:

Originally Posted by boostedtransam

What is the max psi I can run safely without spraying meth?? I have a 402 iron block, sts with a t-70, and a intercooler. Does 10 or 11psi sound about right??

Spill your entire engine's combo to make it easy for people to answer you.

CR?
Camshaft?
Forged or cast pistons/rods?

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Jan 24, 2006 | 12:37 AM

boostedtransam

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It is a turbo cam I dont know the specs off the top of my head, the whole motor is forged, pistons, rods, bottom end, ls6 intake, stage 1.5 heads with 918 springs

Jan 24, 2006 | 12:39 AM

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boostedtransam

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Quote:

Originally Posted by bluecamaroz28

Man, that's good to run upto 16# on 93 octane, if your T-70 Turbo can support it for a 402.

I know the motor can handle 16psi but can it do it without useing meth/alky?

Jan 24, 2006 | 12:48 AM

#11

bluecamaroz28

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Quote:

Originally Posted by boostedtransam

I know the motor can handle 16psi but can it do it without useing meth/alky?

I know a local guy who is running 16# intercooled on a built 346 LS1 with T-88 on 93 octane with no issues but his ride weighs around 2400Ib and sees less traction on sand drags. It has 8.5CR with custom turbo cam and stock heads.

It could be different when you have different load because of more weight and more traction.

Last edited by bluecamaroz28; Jan 24, 2006 at 04:30 AM.

Jan 24, 2006 | 12:54 AM

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boostedtransam

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I just wanted to make sure before I turn the boost up..

Jan 24, 2006 | 12:59 AM

#13

Turbo LS1 SS

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just turn it up, and log for a while. make sure the fuel pressure stays constant, and ur not gettin any DET or KR.....i think u should be more that fine really. id be more worried about the fuel system than the engine component strength.

Jan 24, 2006 | 11:11 AM

#14

Pro Stock John

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I'm sure you can run 10-11 psi without meth, assuming your combo is relatively efficient (ie. your intercooler is not the size of a lunch box).

I've been reading meth threads off and on for a few years, and it seems like meth is acts like straight 104 unleaded/110 leaded... I would not push it farther than that.