996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

My car Vs 991.2 TT-S w/ catless exhaust, tune and intake

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Old Mar 2, 2017 | 04:06 PM
  #256  
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Originally Posted by flewis763
find the post I said 22psi because I never said that. I said 25psi. This particular pull was 26psi.

for **** sake I just said I decided to upgrade now because I don't want to take the car apart again. Did not give up because I thought it wasn't possible. I simply have a limited window to drive my car every year and don't want to tear it apart in the middle of the year to change turbos and retune.

yes I don't think anyone has run 20g at 30psi on a porsche but that doesn't mean they can't do it. It's done all the time on things like evos which actually require even more flow to run 30psi because it's supplying air to 2.0l instead of 1.8l.
Well search the forum and see. I haven't seen any higher. Yes u can go higher but you would start blowing hot air.

My turbos stopped making power after 31psi.
 
Old Mar 2, 2017 | 04:08 PM
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30 lbs is like max on 20g, you don't see them pushed much past this. 20gs been around forever.
 
Old Mar 2, 2017 | 04:13 PM
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Originally Posted by 996tt550hp
Well search the forum and see. I haven't seen any higher. Yes u can go higher but you would start blowing hot air.

My turbos stopped making power after 31psi.
There are well capable of pushing into the 30psi range and still be in a good efficiency range.
you stopped making power at 31 because of restriction on your engine system (most likely your heads and cams) Not because the turbo is not capable of producing more efficiently.
Originally Posted by s65e90
30 lbs is like max on 20g, you don't see them pushed much past this. 20gs been around forever.
That was true for the mhi cast wheels. Billet ones are much more efficient at higher boost levels and are run well into the 30s with e85 or race gas on dsm and evos by hundreds on guys. Hell some guys run 26-28psi on 93 octane with 20g on evos.
 
Old Mar 2, 2017 | 04:16 PM
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Originally Posted by flewis763
There are well capable of pushing into the 30psi range and still be in a good efficiency range.
you stopped making power at 31 because of restriction on your engine system (most likely your heads and cams) Not because the turbo is not capable of producing more efficiently.

That was true for the mhi cast wheels. Billet ones are much more efficient at higher boost levels and are run well into the 30s with e85 or race gas on dsm and evos by hundreds on guys. Hell some guys run 26-28psi on 93 octane with 20g on evos.

25 psi is 16g territory for an OEM car. Most old school 20gs yes, are 30lb max turbos with supporting work. Most times, the supporting work allows for less boost and more HP so as to not overwork them.
 
Old Mar 2, 2017 | 04:16 PM
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Originally Posted by flewis763
There are well capable of pushing into the 30psi range and still be in a good efficiency range.
you stopped making power at 31 because of restriction on your engine system (most likely your heads and cams) Not because the turbo is not capable of producing more efficiently.

That was true for the mhi cast wheels. Billet ones are much more efficient at higher boost levels and are run well into the 30s with e85 or race gas on dsm and evos by hundreds on guys. Hell some guys run 26-28psi on 93 octane with 20g on evos.
Lol and then there motor blows up. If anyone runs 28psi on 93 octane that's dumb.

For my turbos it's 33psi you start blowing hot air not 31psi.
 
Old Mar 2, 2017 | 04:17 PM
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I ran 26-28 psi on an Evo for years on a basic 16g turbo and had one of the fastest IX when they just came out.
 
Old Mar 2, 2017 | 04:18 PM
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Originally Posted by 996tt550hp
Lol and then there motor blows up. If anyone runs 28psi on 93 octane that's dumb.

For my turbos it's 33psi you start blowing hot air not 31psi.
Read above. I ran this on a 16g for years on Evos and have built plenty of fast DSM cars doing similar on pump gas. All cars are different, it's apples to oranges. Some cars can make much more HP while running less boost due to flow characteristics.
 
Old Mar 2, 2017 | 04:18 PM
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Originally Posted by s65e90
I ran 26-28 psi on an Evo for years on a basic 16g turbo and had one of the fastest IX when they just came out.
I had a eclipse awd 1999. I ran a big 16g at 30psi on race gas but it's way different vs a Porsche.
 
Old Mar 2, 2017 | 04:19 PM
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Originally Posted by 996tt550hp
Lol and then there motor blows up. If anyone runs 28psi on 93 octane that's dumb.

For my turbos it's 33psi you start blowing hot air not 31psi.
Originally Posted by 996tt550hp
I had a eclipse awd 1999. I ran a big 16g at 30psi on race gas but it's way different vs a Porsche.

Yes, it's different, but that repudiates your own thought above^^
 
Old Mar 2, 2017 | 04:21 PM
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Originally Posted by s65e90
Read above. I ran this on a 16g for years on Evos and have built plenty of fast DSM cars doing similar on pump gas. All cars are different, it's apples to oranges. Some cars can make much more HP while running less boost due to flow characteristics.

You can't compare an evo and a Porsche. Two different styles.

You can't run on 93 octane above 21psi. Yes people have and blew there motor. You will get a lot of knock I have tried it and didn't work. Now I run e85 everyday no issues.
 

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Old Mar 2, 2017 | 04:25 PM
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Again you just proved your own point wrong. 16g at 30psi. The turbo itself is capable of still flowing air and producing hp at that range.

the issue is the restriction limitation in the flow of the motor on the porsche, not the efficiency of the turbocharger to push air at said psi.
 
Old Mar 2, 2017 | 04:27 PM
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I ran 28 psi on pump on my R32GTR and made 700rwhp. If your fuel is right, you can
 
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Old Mar 2, 2017 | 04:39 PM
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Very cool car!
 
Old Mar 2, 2017 | 04:48 PM
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More gtr pics! It probably has lower compression so you can run higher boost.
 
Old Mar 2, 2017 | 04:50 PM
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Originally Posted by brnrdtns
More gtr pics! It probably has lower compression so you can run higher boost.
Nope, it's impossible. Keith tried it and it didn't work.
 


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