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What could it safely be raised too? I am not talking about raising it to race or anything, but for normal road use when one would use the revs occasionaly to overtake etc?

I know the B5 would safely goto 8.5k odd?>

Rob

IIRC, the B7 RS4 was originally bench tested by Audi at just over 9000 RPM, but their was an issue with emissions so they pegged it back to 8150. Most decent maps raise it back to 8400-8500 which i feel is well within tollerances.

W8PMC wrote:IIRC, the B7 RS4 was originally bench tested by Audi at just over 9000 RPM, but their was an issue with emissions so they pegged it back to 8150. Most decent maps raise it back to 8400-8500 which i feel is well within tollerances.

Was it just emissions or did I read on here about a problem with overheating?

Increased remap to 8.400u/min done by 3rd Party or is it an option from AUDI?

Try getting a new engine (or even a rebuild) from Audi if your motor gets fried and they notice the redline increase.... Never going to happen!!

Great idea, can see deffo see why it would be beneficial, would like to do it myself, but I'm too scared of enormous bills!!

alex_123_fra wrote:

W8PMC wrote:IIRC, the B7 RS4 was originally bench tested by Audi at just over 9000 RPM, but their was an issue with emissions so they pegged it back to 8150. Most decent maps raise it back to 8400-8500 which i feel is well within tollerances.

Was it just emissions or did I read on here about a problem with overheating?

Could well be, as i know that's a problem the test R8's (V8 & V10) have suffered with.

As for warranty, i think if you drove the car constantly bouncing off the limiter then you could be loking at trouble or a big bill, but for the handful of times i've been to the limiter (could count on one hand) i doubt this will stress the engine.

Tartan_Rob wrote:What could it safely be raised too? I am not talking about raising it to race or anything, but for normal road use when one would use the revs occasionaly to overtake etc?

I know the B5 would safely goto 8.5k odd?>

Rob

Mines raised to 8400 ish but to be honest i dont really feel the benefit of it.

When you change up you are slightly up the rev range so may gain 2 or 3 bhp but real world driving it makes no difference.
I think anyone having a remap would be better off leaving the rev limiter at 8150 rpm.

Tartan_Rob wrote:
I know the B5 would safely goto 8.5k odd?>

Not much point in taking a turbo charged car to that level, the turbos would have lost any benifit long before that speed.

Have to say I used to hit rev limiter frequently when it was 8150, since it has been mapped, I very rarely get anywhere near it. Only bonus from increasing the rev limit was that the power curve held on for 200 rpm more

simple1 wrote:

Tartan_Rob wrote:
I know the B5 would safely goto 8.5k odd?>

Have to say I used to hit rev limiter frequently when it was 8150, since it has been mapped, I very rarely get anywhere near it. Only bonus from increasing the rev limit was that the power curve held on for 200 rpm more

Tis good ya??

TBH, whether it makes 2 or 200BHP difference, i can spot the longer curve & likewise find i don't often hit the increased limiter, however it's nice to know it's there & does get bounced sometimes.

Personally, I found that at 8,150 I was bouncing off the limiter quite a bit, now I never hit it, I just change gear where it feels right, just over where it was before, but under where it is now...

On limiters, the one that does feck me off is the 7K one as the car's warming up.

I'd never boot it when cold, but a few times i've been a good few miles from home & had a motorway slip road moment, only to bounce off the 7K limiter which then vanshes about 1min later as the car goes over 60 degrees.

Aye, i find 40mph in first for the first two miles heats it up pretty quick!!

I know what you mean, I really do, but its there for a reason.....

W8PMC wrote:

simple1 wrote:

Tartan_Rob wrote:
I know the B5 would safely goto 8.5k odd?>

Have to say I used to hit rev limiter frequently when it was 8150, since it has been mapped, I very rarely get anywhere near it. Only bonus from increasing the rev limit was that the power curve held on for 200 rpm more

Tis good ya??

TBH, whether it makes 2 or 200BHP difference, i can spot the longer curve & likewise find i don't often hit the increased limiter, however it's nice to know it's there & does get bounced sometimes.

The 2.7tt won't rev to 8.5k without spending large sums to strengthen the top end. 7.2k is about the limit.

W8PMC wrote:

simple1 wrote:

Tartan_Rob wrote:
I know the B5 would safely goto 8.5k odd?>

Have to say I used to hit rev limiter frequently when it was 8150, since it has been mapped, I very rarely get anywhere near it. Only bonus from increasing the rev limit was that the power curve held on for 200 rpm more

Tis good ya??

TBH, whether it makes 2 or 200BHP difference, i can spot the longer curve & likewise find i don't often hit the increased limiter, however it's nice to know it's there & does get bounced sometimes.

Ditto.

DavidT wrote:

W8PMC wrote:

simple1 wrote: Have to say I used to hit rev limiter frequently when it was 8150, since it has been mapped, I very rarely get anywhere near it. Only bonus from increasing the rev limit was that the power curve held on for 200 rpm more

Tis good ya??

TBH, whether it makes 2 or 200BHP difference, i can spot the longer curve & likewise find i don't often hit the increased limiter, however it's nice to know it's there & does get bounced sometimes.

The 2.7tt won't rev to 8.5k without spending large sums to strengthen the top end. 7.2k is about the limit.

7.4 is stretching it if flow is good, 7.5 definitely gets valve springs to float (tried it on my own car and I hated the sound it made past 7.4k).