safe boost!
#26
Originally posted by NZConvertible
8.6psi is fuel cut on all models.
8.6psi is fuel cut on all models.
I have never seen any "offical" source on the matter. Has anyone else? NZ, what is your source for the information? I had always hear that s4's were 7.5 and s5's were 8.6
#27
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Err.. my car is an S4... before I had my FCD it hit fuel cut at 8.x psi.
Others have performed tests on the ECU and found that fuel cut hits at a certain voltage signal which corresponded to 8.6 psi.
Others have performed tests on the ECU and found that fuel cut hits at a certain voltage signal which corresponded to 8.6 psi.
#29
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According to my boost guage, I'm fuel cutting at 7.5 psi. I was beginning to think my boost guage was off but then i noticed that my boost hesitated at 5.5 psi for a little before creeping to 7.5. So, i know my guage is right.
#30
Pinning down the exact fuel cut boost pressure is a bit tricky because the ECU will tolerate overboosting at some rpms for a certain length of time. Also, manufacturing tolerances in the various components (eg boost pressure sensor) will affect things a bit. Conventional wisdom is that the S4 and S5 have different cut points though - hence different fuel cut defensers are made for the two different series ...
#31
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i don't want to sound like a know it all, but i thought that the difference between the two was changes made in the wiring harness. to the point that s4 and s5 sensors couldn't be interchanged cause the wires were switched around. i could have been fed some BS by someone, so please, correct me if i'm wrong.
#32
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Originally posted by fstrnyou
I was beginning to think my boost guage was off but then i noticed that my boost hesitated at 5.5 psi for a little before creeping to 7.5. So, i know my guage is right.
I was beginning to think my boost guage was off but then i noticed that my boost hesitated at 5.5 psi for a little before creeping to 7.5. So, i know my guage is right.
And if you say "5.5psi is stock max boost", you're wrong...
#33
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Originally posted by 13bpower
I would have to disagree with this because of personal experiences. I know for sure that my cars fuel cut is at 7.5, others may have other experiences.
I have never seen any "offical" source on the matter. Has anyone else? NZ, what is your source for the information? I had always hear that s4's were 7.5 and s5's were 8.6
I would have to disagree with this because of personal experiences. I know for sure that my cars fuel cut is at 7.5, others may have other experiences.
I have never seen any "offical" source on the matter. Has anyone else? NZ, what is your source for the information? I had always hear that s4's were 7.5 and s5's were 8.6
#34
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Originally posted by NZConvertible
What is that supposed to prove?
And if you say "5.5psi is stock max boost", you're wrong...
What is that supposed to prove?
And if you say "5.5psi is stock max boost", you're wrong...
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