how much boost have you done?
#1
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how much boost have you done?
i just got a turbo II. i have been following turbo II's for a long time now. i wanted to know what is the highest someone has gone on boost and with what turbo. i heard that around 16psi is the farthest you can go with being safe. ill see what you guys have to say.
#3
Bimmer *****
my stock turbo boosts up to 22 psi in 4th gear.... the only saving grace i have is the 720 cc secondaries, but its still horrible for the car, hence why i don't boost as much as i did with the last motor, my own foot is my manual boost controller stupid stuck wastegate
#6
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It used to see regular 14psi.
I wa trying to tune it for 17psi, but the turbo promptly pukes it's oil seals in a week.
I did see 18psi by mistake trying to "tune" an MBC - doh!
-Ted
I wa trying to tune it for 17psi, but the turbo promptly pukes it's oil seals in a week.
I did see 18psi by mistake trying to "tune" an MBC - doh!
-Ted
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#9
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yeah i plan on upgrading the turbo to a gt25 turbo, spearco custom intercooler, haltech, fuel system and getting the motor rebuilt and street ported. then i want to see what kind of boost i could put to it
#12
I have hit 16psi on a fluke. Downshifted onto a freeway onramp, Stomped it, Boost skyrocketed befor the twin-scroll actuator could open. 16psi at 3500rpms is FAST.
Now it varies between 10-13 depending on the weather. Fun stuff.
Now it varies between 10-13 depending on the weather. Fun stuff.
#14
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damn 20psi is a lot i would think. i dont think with my new setup im going to boost over 16psi but i believe with that setup it will put me over 400hp. thats enough
#18
I wish I was driving!
Originally posted by jreynish
12 Psi s4 turbo is maximum efficiency,
14Psi on s5 turbo is maximum efficency,
After this they are just spinning more.
I have ran 20PSI but not on stock! as i am sure you can see.
12 Psi s4 turbo is maximum efficiency,
14Psi on s5 turbo is maximum efficency,
After this they are just spinning more.
I have ran 20PSI but not on stock! as i am sure you can see.
#20
I wish I was driving!
Originally posted by jreynish
Same core... Yes,
However the turbine housing is different between the two the S5 turbine housing allows for a little more flow but enough to make a difference! they are both impact type exhaust housings, But the S5 is different in desing.
Same core... Yes,
However the turbine housing is different between the two the S5 turbine housing allows for a little more flow but enough to make a difference! they are both impact type exhaust housings, But the S5 is different in desing.
Where did you get this information? Pretty heard to prove without a compressor map, which is not available for the stock turbos, and I doubt anyone has made one. I suppose you could do testing with an temperature probe, but I doubt anyone would take the time to do so with both turbos back to back.
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[QUOTE]Originally posted by fc3sturboII
[B]yeah i plan on upgrading the turbo to a gt25 turbo,
i always thought that this turbo is 2 sizes smaller than the turbo that comes on the stock fc which is a t04 s-trim
[B]yeah i plan on upgrading the turbo to a gt25 turbo,
i always thought that this turbo is 2 sizes smaller than the turbo that comes on the stock fc which is a t04 s-trim
#25
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I always thought you needed something like a GT35ish to hit 400 on our cars? I suppose if you upped the boost a lot, you could hit 400 but no one has thrown this out on the table yet so I assume that I'm wrong.