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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.
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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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Old 09-15-2013, 04:21 PM   #15
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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.
lol RWHP doesn't mean anything on an engine. You affect that dynamic compression via boost stroke etc etc ... So Boost DOES matter a lot.

My V is running 11psi at 648rwhp w/o spray.... It's going to last much longer than a V running 17psi at 650rwhp....

Boost is directly related to this to engine limits... It has nothing to do with your hp number... If that was true how do you explain mustang vs dyno jet numbers.....
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Old 09-15-2013, 04:23 PM   #16
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I've seen expensive meth kits fail. I don't cut corners on my cars, so I don't need crutches like meth to keep it all together.

And apparently you have no idea how engines work. Dynamic compression doesn't matter? Ok.
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Old 09-15-2013, 04:27 PM   #17
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I've seen expensive meth kits fail. I don't cut corners on my cars, so I don't need crutches like meth to keep it all together.

And apparently you have no idea how engines work. Dynamic compression doesn't matter? Ok.
rofl...

Where did I say dynamic compression doesn't matter lol.. BOOST AFFECTS DYNAMIC compression genius.

Boost is DIRECTLY related with engine limits... It doesn't matter how much hp you have rofl..... If HP matters how do you explain different numbers from mustang and dynojet numbers?

Also at expensive meth kits failing most people have fail safes...How is spraying meth cutting corners lol. It has cooling affect and adds safety... Not many people tune it for power, but what do I know.. I just have a bunch of meth'd cars.
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Old 09-15-2013, 04:32 PM   #18
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I'll simplify this for you, dynamic compression=horsepower. Engines don't give adamn about boost, your motor that makes 650hp at 11psi is no safer than a motor making 650 with 17psi, because the total cylinder pressure is the SAME.

Horsepower on a dyno doesn't mean jack, they are a tuning tool and nothing else. Track times are the only thing that matters. If you want to build a dyno queen go for it, meth works well for that, it's a cheap way to make more power.
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Old 09-15-2013, 04:40 PM   #19
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I'll simplify this for you, dynamic compression=horsepower. Engines don't give adamn about boost, your motor that makes 650hp at 11psi is no safer than a motor making 650 with 17psi, because the total cylinder pressure is the SAME.

Horsepower on a dyno doesn't mean jack, they are a tuning tool and nothing else. Track times are the only thing that matters. If you want to build a dyno queen go for it, meth works well for that, it's a cheap way to make more power.

Engines don't give a damn about boost??? lololololol.

Dyno queens use meth now? lol. Coming from a 13 second 5th gen owner.
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Old 09-15-2013, 04:50 PM   #20
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13 second? Maybe you should check out someone's build before you talk to them. To start, I have a LSX built for 1500whp in my car, and I have every intention of testing that rating.

As far as boost goes, it's a measure of restriction, but if you want to pound your chest about 11psi and meth, my diesel makes 80 pounds of boost. Not to mention it'll drag your Caddy's ass down the track.
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Old 09-15-2013, 04:57 PM   #21
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13 second? Maybe you should check out someone's build before you talk to them. To start, I have a LSX built for 1500whp in my car, and I have every intention of testing that rating.

As far as boost goes, it's a measure of restriction, but if you want to pound your chest about 11psi and meth, my diesel makes 80 pounds of boost. Not to mention it'll drag your Caddy's ass down the track.

A) Want to know how I know you know nothing... You have an LSX for boost lol. Good luck with that. Maybe you should look around to what's happening to boosted LSXs.

B) If you want to race fast cars I have a twin 7675 427RHS old nova that puts down over 1600whp, so sure you'll "drag" me down the track.

C) You still know nothing about engines and meth. You have proved this with all your posts. Thinking meth is cheap way to make power when majority of meth users use it for safety nets, not power. And thinking boost doesn't affect engines hahaha. Jesus some things you say make me think you are still in high school and listen to dad talk to his friends about cars.
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Old 09-15-2013, 05:01 PM   #22
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If you run meth I'd say 12 all day. No meth I'd stay around or less than 8.
What was that about a safety net, not to make power?
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Old 09-15-2013, 05:03 PM   #23
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What was that about a safety net, not to make power?
???

You run more boost...you spray meth for more octane...


Do you even know how meth works? Jesus christ my IQ is falling just talking to you.
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Old 09-15-2013, 05:07 PM   #24
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You run more boost...you spray meth for more octane...

Wouldn't that mean relying on it to make power?
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Old 09-15-2013, 05:09 PM   #25
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Wouldn't that mean relying on it to make power?

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