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Old 09-14-2013, 07:30 PM   #1
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Smile How much boost ?

How much boost is safe enough for ls3 engine with stock internals ,as I'm using my car as daily drive .

Currently I'm running 6 psi which I believe it's little low IMO.
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Old 09-14-2013, 07:47 PM   #2
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Everybody will tell you different numbers based on a number of things. I'm currently at 15lbs, however, I would say 8-10 at most.
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Old 09-14-2013, 07:58 PM   #3
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Everybody will tell you different numbers based on a number of things. I'm currently at 15lbs, however, I would say 8-10 at most.
I'm using 3.8 pulley which should give me 7.5 to 8 psi ,I thing I'm losing boost due the LT headers .
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Old 09-14-2013, 08:02 PM   #4
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Quote:
Originally Posted by Skoulikimou View Post
How much boost is safe enough for ls3 engine with stock internals ,as I'm using my car as daily drive .

Currently I'm running 6 psi which I believe it's little low IMO.
Quote:
Originally Posted by Skoulikimou View Post
I'm using 3.8 pulley which should give me 7.5 to 8 psi ,I thing I'm losing boost due the LT headers .
It's not the boost that'll do you in it's the lack of a fuel system.

All you'll be able to do is put a 3.6 pulley on and call it a day. Any more than that and you need fuel upgrades.
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Old 09-14-2013, 08:05 PM   #5
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I have right at 10psi with a 3.4 pulley.
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Old 09-14-2013, 08:06 PM   #6
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I have right at 10psi with a 3.4 pulley.
Bap?
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Old 09-14-2013, 08:07 PM   #7
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dual pump LPE
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Old 09-14-2013, 08:08 PM   #8
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dual pump LPE
That'll do it.

Jamie, will running a BAP help if he wanted to run more boost on a smaller pulley?
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Old 09-14-2013, 08:13 PM   #9
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10.5 psi here and dual pumps
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Old 09-14-2013, 08:15 PM   #10
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That'll do it.

Jamie, will running a BAP help if he wanted to run more boost on a smaller pulley?
Yes. A 3.4 will need a bap.

With the TVS any more than 10 psi in a 6 rib will generate belt slip. That blower is pretty much the biggest pain in the ass to make any decent boost.
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Old 09-15-2013, 03:40 PM   #11
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If you run meth I'd say 12 all day. No meth I'd stay around or less than 8.
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Old 09-15-2013, 03:47 PM   #12
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If you run meth I'd say 12 all day. No meth I'd stay around or less than 8.
That's a bad idea. You should never rely on method as a fuel supply. To many bad things can happen.

Not to mention he'll need at least the OD rear cogs to make 12 psi.
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Old 09-15-2013, 03:53 PM   #13
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It's not even about boost that matter to a motor, it's dynamic compression, cylinder pressure. Anything over 650whp is on borrowed time.
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Old 09-15-2013, 04:19 PM   #14
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That's a bad idea. You should never rely on method as a fuel supply. To many bad things can happen.

Not to mention he'll need at least the OD rear cogs to make 12 psi.
I've been using meth on all my cars for years now with not 1 problem.

Of course if you go cheap end and buy the basic snow performance kit and your pump craps out you're going to have a problem. But if you buy the good meth kits you'll never see that happen.

Meth is God's gift for people who don't have access to good fuel and/or E85. It's cooling effects are also pretty ba. My spray is a much better coolant but who sprays all day .
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