Rev limiter issue

4.2 V8 32v Naturally Aspirated - 414 bhp
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CUbuff
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Rev limiter issue

Post by CUbuff » Wed Sep 03, 2008 5:04 pm

I've had my RS4 for a couple months now (about 4k miles) and recently hit the rev limiter in second gear at 7500 rpm. Is this normal? Anyone else experience this?

dom888
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RE: Rev limiter issue

Post by dom888 » Wed Sep 03, 2008 5:06 pm

No that's not normal. I hit the rev limiter within the first week.

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CUbuff
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RE: Rev limiter issue

Post by CUbuff » Wed Sep 03, 2008 5:23 pm

well I've hit it a few times before but only recently noticed the early cut off in second

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PetrolDave
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RE: Rev limiter issue

Post by PetrolDave » Wed Sep 03, 2008 5:33 pm

Are you sure it was 7500rpm?

Don't forget that the rev limiter is reduced to 7000rpm until the oil temperature reaches 60 Celsius (don't know what that is in Fahrenheit) when it increases to 8250rpm.

I hit the 8250rpm rev limiter most days, and it always surprises me when the engine hasn't fully warmed up on a cold day and it hits the limiter early at 7000rpm.
Gone: 2006 B7 RS4 Avant (Phantom Black)

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pippyrips
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Re: RE: Rev limiter issue

Post by pippyrips » Wed Sep 03, 2008 9:52 pm

dom888 wrote:No that's not normal. I hit the rev limiter within the first week.
PMSL :thumb:

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CUbuff
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RE: Re: RE: Rev limiter issue

Post by CUbuff » Thu Sep 04, 2008 5:58 pm

Problem solved... I'm a newb. Thanks Dave :D

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PetrolDave
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Re: RE: Re: RE: Rev limiter issue

Post by PetrolDave » Thu Sep 04, 2008 6:55 pm

CUbuff wrote:Problem solved... I'm a newb. Thanks Dave :D
Just watch the bottom line of the DIS - when the oil is below 60 Celsius it says "Max 7000rpm", but when the oil reaches that it shows an oil can symbol and shows the oil temperature in Celsius or Fahrenheit depending on how the instruments are coded.

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CUbuff
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RE: Re: RE: Re: RE: Rev limiter issue

Post by CUbuff » Thu Sep 04, 2008 10:32 pm

Damn... guess I should take my eyes off the road more often to catch all the cool stuff I'm apparently missing!!

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nidfix
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Re: RE: Rev limiter issue

Post by nidfix » Fri Sep 05, 2008 12:47 am

PetrolDave wrote: I hit the 8250rpm rev limiter most days, and it always surprises me when the engine hasn't fully warmed up on a cold day and it hits the limiter early at 7000rpm.
Do you truly go up to 7000rpm when the engine is still cold ? :shock:

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PetrolDave
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Re: RE: Rev limiter issue

Post by PetrolDave » Fri Sep 05, 2008 9:44 am

nidfix wrote:
PetrolDave wrote: I hit the 8250rpm rev limiter most days, and it always surprises me when the engine hasn't fully warmed up on a cold day and it hits the limiter early at 7000rpm.
Do you truly go up to 7000rpm when the engine is still cold ? :shock:
I try not to, but occasionally on cold days when I get to a roundabout near the M27 where the engine is normally warm it hasn't got over 60 Celsius. Probably no more than once a month...

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pippyrips
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Re: RE: Rev limiter issue

Post by pippyrips » Fri Sep 05, 2008 11:36 am

nidfix wrote:
PetrolDave wrote: I hit the 8250rpm rev limiter most days, and it always surprises me when the engine hasn't fully warmed up on a cold day and it hits the limiter early at 7000rpm.
Do you truly go up to 7000rpm when the engine is still cold ? :shock:
Thats what i was thinking! - i don't go above 3.5k before i see 65+

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al'srs4
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RE: Re: RE: Rev limiter issue

Post by al'srs4 » Mon Sep 08, 2008 8:03 pm

Hit the rev cut off tonight at about 8000rpm, power suddenly dropped off. Got a bit over zealous with a super seven. I am not a techi so wondered if this may have affected the car in some way. I am almost sure that it won't have as the cut off is there to stop exactly that. But though I would ask as it is the first and last time hopefully. :|
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PetrolDave
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Re: RE: Re: RE: Rev limiter issue

Post by PetrolDave » Tue Sep 09, 2008 5:59 pm

al'srs4 wrote:Hit the rev cut off tonight at about 8000rpm, power suddenly dropped off. Got a bit over zealous with a super seven. I am not a techi so wondered if this may have affected the car in some way. I am almost sure that it won't have as the cut off is there to stop exactly that. But though I would ask as it is the first and last time hopefully. :|
Don't worry - the rev limiter is there to stop the revs going too high to cause any problem, some chip companies raise the limiter to 8400rpm.

Enjoy the sound of a V8 doing 8000+rpm - it's addictive!

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