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Safe amount of boost to run on an S4
Posted: Tue Mar 29, 2005 2:24 pm
by BRETTCOLLINS
can anyone tell me what a safe amount of boost would be on an S4 with K04 turbo's.
RE: Safe amount of boost to run on an S4
Posted: Tue Mar 29, 2005 9:50 pm
by KayGee
Million dollar question.
1.3-1.2 seems fairly usual on an S4 (APR, MTM kits). However finding data is really hard. Very few dyno plots show boost against RPM. What does your AMD chip do?
I think the RS4 runs around 1.2-1.0 bar, it actually runs more boost higher up unlike the S4 which tapers off. Not sure what the chipped RS4s run. Hopefully someone from RS4 board will join in.
RE: Safe amount of boost to run on an S4
Posted: Wed Mar 30, 2005 8:09 am
by BRETTCOLLINS
Have been told that my car has been set on 20 PSI, but this seems a bit high to me. what do people think.
(20 PSI is 1.379 BAR ) I think
RE: Safe amount of boost to run on an S4
Posted: Wed Mar 30, 2005 9:23 am
by Mik
Brett
How much power are you getting from your remap with such a level of boost?
Mik
RE: Safe amount of boost to run on an S4
Posted: Wed Mar 30, 2005 10:03 am
by KayGee
Doesn't sound OTT, if a RS4 runs 1.2 in std trim. Suspect that chipped RS4s run 1.4, I believe Verrukt runs 1.5 on his S4, although he has hybrids and flowed heads and cams.
Got any VAG com (003, 115) logs or Dyno runs?
RE: Safe amount of boost to run on an S4
Posted: Wed Mar 30, 2005 10:23 am
by KayGee
Just realised in a couple of weeks our cars will be twins. Your K04 setup will be almost the same as mine. I'm having the RS4 oil cooler as well.
RE: Safe amount of boost to run on an S4
Posted: Wed Mar 30, 2005 12:07 pm
by BRETTCOLLINS
the car running 413.8bhp with 438.5 torque
Posted: Wed Mar 30, 2005 12:23 pm
by dazzer
I believe NASA are good with rocket ships.....
Posted: Wed Mar 30, 2005 12:44 pm
by Dippy
If you guys don't have a boost gauge then I am amazed. I only have mild tuning compared to you and I wouldn't be without it.
1.4 bar is perfectly fine for K04s (as long as you have your APR bipipe!).
Posted: Wed Mar 30, 2005 5:50 pm
by BRETTCOLLINS
Do have a boost gauge and APR bi-pipe, Goes to 20psi on launch then backs off to about 16 PSI I think.
Posted: Thu Mar 31, 2005 2:12 pm
by Dippy
Get a metric one then
That's the same as mine, so I suggest your map is conservative.
Posted: Thu Mar 31, 2005 3:51 pm
by BRETTCOLLINS
Yes but 600 easy miles later and only kicked four times the engine blow up. not happy
Posted: Thu Mar 31, 2005 4:00 pm
by jeffw
the car running 413.8bhp with 438.5 torque
One who's Dyno ?
Out of interest what was your Wheel Horse Power and losses ?
Posted: Thu Mar 31, 2005 5:20 pm
by KayGee
Do you know what happened to the engine yet? First S4 I have heard off that expired.
Posted: Fri Apr 01, 2005 7:28 am
by BRETTCOLLINS
Not yet, But piston 6 with shot, no compression with 96% pressure loss.