Turbo Question
Thread Starter
Registered User
Joined: Sep 2010
Posts: 303
From: Portland, OR
Turbo Question
So question. can a larger engine handle more boost? example. stock boost for vg30et is 6.8. can a vg33 handle a safer higher boost 10 perhaps and still be as safe as the vg30et? thanks
The Emblem Thief y0!
Joined: Aug 2009
Posts: 948
From: Tulsa, Ok
Stronger internals = safer higher boost. You could probably sleep well at night if you didn't boost higher than 10psi.
Learn: Size doesn't matter.
Unless you want higher boost, then you need a bigger turbo...
tumblr_l7p7tl5wia1qzlin0o1_500.jpg?t=1290035202
Learn: Size doesn't matter.
Unless you want higher boost, then you need a bigger turbo...
tumblr_l7p7tl5wia1qzlin0o1_500.jpg?t=1290035202
Last edited by WanganDevilZ; Nov 17, 2010 at 03:07 PM.
Ruff Ryder
Joined: Sep 2005
Posts: 6,140
From: palm desert
It has nothing to do with the strength of the internals, it has to do with the tune and the size of the turbo!
Über User
Joined: Sep 2005
Posts: 9,532
From: lemont, Illinois
Über User
Joined: Sep 2005
Posts: 9,532
From: lemont, Illinois
maybe I did... but balsa wood is way to funny to not use in a ridiculous rhetorical situation.
But more realistic, internals strength will become an issue no matter what the tune after certain limits. On these old 80's motors, a completely stock motor I would say 10psi max, MLS HG it and ARP heat stud it, you could go up to 20 if the motor is otherwise healthy and then yes at this point a very good tune high octane and then we are getting into meth injection territory as well. But the longevity of that motor even tuned well is in question, and wouldn't compare to a built motor with good forged internals and such.
In my personal opinion, ANY motor should be able to take 10psi though from teh factory if tuned well. any any any.
When I see stock S2000 blocks with absolutely nothing done to them engine wise other than ARP head studs handle 30+lbs of boost and put down over 700RWP with an 11.5:1 compression ratio and a 9k rpm redline, I believe anything can handle moderate boost levels.
all be-it those motors only last 20,000-ish miles once they start seeing over 500whp... still pretty damn impressive.
Oh and to the OP, displacement has ZERO impact on ability to handle more boost. More displacement though at the same level of boost as a motor with less displacement will, or at least should, create more power and torque. Just incase the extreme levels of sarcasm in everyone's responses didn't get that point across
But more realistic, internals strength will become an issue no matter what the tune after certain limits. On these old 80's motors, a completely stock motor I would say 10psi max, MLS HG it and ARP heat stud it, you could go up to 20 if the motor is otherwise healthy and then yes at this point a very good tune high octane and then we are getting into meth injection territory as well. But the longevity of that motor even tuned well is in question, and wouldn't compare to a built motor with good forged internals and such.
In my personal opinion, ANY motor should be able to take 10psi though from teh factory if tuned well. any any any.
When I see stock S2000 blocks with absolutely nothing done to them engine wise other than ARP head studs handle 30+lbs of boost and put down over 700RWP with an 11.5:1 compression ratio and a 9k rpm redline, I believe anything can handle moderate boost levels.
all be-it those motors only last 20,000-ish miles once they start seeing over 500whp... still pretty damn impressive.
Oh and to the OP, displacement has ZERO impact on ability to handle more boost. More displacement though at the same level of boost as a motor with less displacement will, or at least should, create more power and torque. Just incase the extreme levels of sarcasm in everyone's responses didn't get that point across
Ruff Ryder
Joined: Sep 2005
Posts: 6,140
From: palm desert
maybe I did... but balsa wood is way to funny to not use in a ridiculous rhetorical situation.
But more realistic, internals strength will become an issue no matter what the tune after certain limits. On these old 80's motors, a completely stock motor I would say 10psi max, MLS HG it and ARP heat stud it, you could go up to 20 if the motor is otherwise healthy and then yes at this point a very good tune high octane and then we are getting into meth injection territory as well. But the longevity of that motor even tuned well is in question, and wouldn't compare to a built motor with good forged internals and such.
In my personal opinion, ANY motor should be able to take 10psi though from teh factory if tuned well. any any any.
When I see stock S2000 blocks with absolutely nothing done to them engine wise other than ARP head studs handle 30+lbs of boost and put down over 700RWP with an 11.5:1 compression ratio and a 9k rpm redline, I believe anything can handle moderate boost levels.
all be-it those motors only last 20,000-ish miles once they start seeing over 500whp... still pretty damn impressive.
Oh and to the OP, displacement has ZERO impact on ability to handle more boost. More displacement though at the same level of boost as a motor with less displacement will, or at least should, create more power and torque. Just incase the extreme levels of sarcasm in everyone's responses didn't get that point across
But more realistic, internals strength will become an issue no matter what the tune after certain limits. On these old 80's motors, a completely stock motor I would say 10psi max, MLS HG it and ARP heat stud it, you could go up to 20 if the motor is otherwise healthy and then yes at this point a very good tune high octane and then we are getting into meth injection territory as well. But the longevity of that motor even tuned well is in question, and wouldn't compare to a built motor with good forged internals and such.
In my personal opinion, ANY motor should be able to take 10psi though from teh factory if tuned well. any any any.
When I see stock S2000 blocks with absolutely nothing done to them engine wise other than ARP head studs handle 30+lbs of boost and put down over 700RWP with an 11.5:1 compression ratio and a 9k rpm redline, I believe anything can handle moderate boost levels.
all be-it those motors only last 20,000-ish miles once they start seeing over 500whp... still pretty damn impressive.
Oh and to the OP, displacement has ZERO impact on ability to handle more boost. More displacement though at the same level of boost as a motor with less displacement will, or at least should, create more power and torque. Just incase the extreme levels of sarcasm in everyone's responses didn't get that point across
Über User
Joined: Sep 2005
Posts: 9,532
From: lemont, Illinois
I'd update the head studs on any motor going after more than 15 psi regardless of how new it is, cause a slight stretch will destroy a composite HG. if it had a factory MLS HG then fair enough... you could get away with it. And no i am not saying it is necessary, but it's a safe and good idea.
Ruff Ryder
Joined: Sep 2005
Posts: 6,140
From: palm desert
I'd update the head studs on any motor going after more than 15 psi regardless of how new it is, cause a slight stretch will destroy a composite HG. if it had a factory MLS HG then fair enough... you could get away with it. And no i am not saying it is necessary, but it's a safe and good idea.
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