Is 23lbs of boost safe for me?
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Is 23lbs of boost safe for me?
I've got an 05 GSR Model. I have a TBE, MBC, and AEM Intake and was just lucky enough to get a custom flash from TurboTrix when they vistited my city. The tuner and I never discussed my boost level and I dont think he even messed with it but before I got there I had set it to 21lbs. Long story short he flashed it and I loved it. Just yesterday i started experimenting and turned the boost up to 23lbs. I was considering running 24lbs of boost on some 104 Octane tomorrow. What do you guys think? I need some advice. Am I running too much boost? Will my wastegate and stock BOV be able to handle 23 or 24lbs of boost? Thanks.
david
david
#2
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Originally Posted by david350Z03
I've got an 05 GSR Model. I have a TBE, MBC, and AEM Intake and was just lucky enough to get a custom flash from TurboTrix when they vistited my city. The tuner and I never discussed my boost level and I dont think he even messed with it but before I got there I had set it to 21lbs. Long story short he flashed it and I loved it. Just yesterday i started experimenting and turned the boost up to 23lbs. I was considering running 24lbs of boost on some 104 Octane tomorrow. What do you guys think? I need some advice. Am I running too much boost? Will my wastegate and stock BOV be able to handle 23 or 24lbs of boost? Thanks.
The wastegate isn't a concern, but the stock BOV will definitely leak out some of that excess boost, so again, you won't get quite as much of a gain as with a proper setup, but it should still be nicer than your regular, everyday setup.
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Originally Posted by david350Z03
Wow. cause I have been running 23lbs of boost on 93 all day today. No knock.
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If you were tuned on 21psi then you might want to leave it there depending on how conservative their tune was. If you're running race gas it's usually safe to turn the boost up a little bit.
I personally perfer to run around 19.5 psi on pump 93. Higher boost means more heat and higher EGT's which can be bad during hot summer weather... so higher boost doesn't always mean more power.. it can cause the motor to pull timing if knock is present.
I normally run around 23psi on GT100 race gas which takes my AFR from low 11's to high 11's. Car feels like a monster on race gas![Big Grin](https://www.evolutionm.net/forums/images/smilies/biggrin.gif)
just my .02
I personally perfer to run around 19.5 psi on pump 93. Higher boost means more heat and higher EGT's which can be bad during hot summer weather... so higher boost doesn't always mean more power.. it can cause the motor to pull timing if knock is present.
I normally run around 23psi on GT100 race gas which takes my AFR from low 11's to high 11's. Car feels like a monster on race gas
![Big Grin](https://www.evolutionm.net/forums/images/smilies/biggrin.gif)
just my .02
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I am tuned on a 23lb spike and it holds 22.5 for a bit then tapers to 20psi at 7200rpm. It will only hold 23lbs if I use a 5th gear load. As for losing timing, I am probably pulling some in this weather(95deg.), but Al has me at or below 10:1 a/f from 3.5k to 5.5k which is where the car is at 22.5+psi of boost to keep the car from knocking. He then leans me out to 11.8ish a/f because the boost is around 21ish psi around then and holds 20 to about 7200rpm.
#7
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i'm tuned on 22.5 psi.
i used to run 23 psi daily on 93 octane.
it ran lean a bit without the fuel pump.
if you go over 21psi, you should invest in a fuel pump before trying to go up more.
Fuel pump tend to fail after that point, i've noticed... or what i've experienced.
i used to run 23 psi daily on 93 octane.
it ran lean a bit without the fuel pump.
if you go over 21psi, you should invest in a fuel pump before trying to go up more.
Fuel pump tend to fail after that point, i've noticed... or what i've experienced.
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#12
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All these people claiming to run 23psi on a daily basis confuses me. You probably make less power trying to run 23psi (steady, not spike) than if you ran 20, due to the inherent knock that comes into play with 93oct and summer heat. If you claim no knock or pulled timing whatsoever, please go do it at the drag strip and show us the results. I would expect no less than 110mph (113 w/cams) from all of you if your 23psi is working so well...
#14
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Originally Posted by gsujeff55
113 with cams on pump gas? What crack you smokin?
23psi falling off to 18-19 at redline is tuned for and run all the time. Now, if you guys are running stock timing, thats a different story. 23psi with stock timing is too much on 93 octane.
23psi falling off to 18-19 at redline is tuned for and run all the time. Now, if you guys are running stock timing, thats a different story. 23psi with stock timing is too much on 93 octane.
#15
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without wastegate line modification, none of these guys are holding 23psi above 5500....
and no, 113 is high for pump gas and stock turbo.....it can be done, but its HIGHLY unlikely.
Ive done just about every bolt on imaginable....and still only hit about 111 on pump gas.
and no, 113 is high for pump gas and stock turbo.....it can be done, but its HIGHLY unlikely.
Ive done just about every bolt on imaginable....and still only hit about 111 on pump gas.