Does it really make a difference?
My car has just turned 49000, just wondering if it would make a noticeable difference?
Cheers
Simon
De-coke???
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theboyleach
- 1st Gear
- Posts: 63
- Joined: Tue Jun 12, 2012 10:45 pm
De-coke???
Audi RS4 Cab 2006
Daytona Grey
Daytona Grey
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PetrolDave
- Cruising
- Posts: 7599
- Joined: Mon Nov 07, 2005 11:28 am
- Location: Southampton, Hampshire UK
Re: De-coke???
Do the 3000-8000rpm test, if you still do a time that's within the factory spec (somewhere in the high 8 second area) then you'll be making close to factory power so it won't make much difference.theboyleach wrote:Does it really make a difference?
My car has just turned 49000, just wondering if it would make a noticeable difference?
Gone: 2006 B7 RS4 Avant (Phantom Black)
Re: De-coke???
Sounds interesting. How exactly do i do this test? I take its best to use the lap-timer built in the fis?PetrolDave wrote:Do the 3000-8000rpm test.theboyleach wrote:Does it really make a difference?
My car has just turned 49000, just wondering if it would make a noticeable difference?
Audi RS4 Avant
[2014]: blacked out wheels & grill: center res delete : flaps open
[2015]: brembo & yellowstuff : michelin pss : h&r spacers
[2016]: sachs performance clutch : decoked : led there be light : black window trim
[2017]: stertman stage 1 : black headlights & clear corner mod : gruppe m air intake : gutted resonators
[2014]: blacked out wheels & grill: center res delete : flaps open
[2015]: brembo & yellowstuff : michelin pss : h&r spacers
[2016]: sachs performance clutch : decoked : led there be light : black window trim
[2017]: stertman stage 1 : black headlights & clear corner mod : gruppe m air intake : gutted resonators
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manual_daniel
- 2nd Gear
- Posts: 108
- Joined: Thu Jun 13, 2013 3:40 pm
- Location: Nice, France
Re: De-coke???
A very good test - lots of good information here.harding wrote:Sounds interesting. How exactly do i do this test? I take its best to use the lap-timer built in the fis?PetrolDave wrote:Do the 3000-8000rpm test.theboyleach wrote:Does it really make a difference?
My car has just turned 49000, just wondering if it would make a noticeable difference?
http://forum.rs246.com/viewtopic.php?f= ... 0+rpm+test
Now: 2007 Daytona RS4 Avant
Passed On: 2003 Mugello RS6 Sedan
Passed On: 2003 Mugello RS6 Sedan
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Bladerider
- 4th Gear
- Posts: 516
- Joined: Mon Nov 28, 2005 3:49 pm
- Location: Speedfreak County !!
- Contact:
Re: De-coke???
Definately.
My car was making 328 bhp !!!
Now nearly 440 !!!
My car was making 328 bhp !!!
Now nearly 440 !!!
07 RS4 Avus Avant : Usual spec with Buckets+FBSW+iPod dock+TV etc...100k+
Thanks to GBH Motorsport MRC Tuning VirdeeAuto Dubstep AwesomeGTI Wallachie Trups
H&R - Coilovers ARBs Spacers : 034 - RearArms Droplinks BilletMounts StrutTops : Eibach FrontArms : Powerflex Bushes
MRC - Stage2 Map+codeouts Stage2 Inlet+7mm gasket Stage2 deCarbon CAF : BMC Filter : Milltek Decats NonRes
Anthracite Alloys : Advan Neovas : Ferodo Pads+Castrol SRF : HEL Brakelines : Trups LED lighting
Thanks to GBH Motorsport MRC Tuning VirdeeAuto Dubstep AwesomeGTI Wallachie Trups
H&R - Coilovers ARBs Spacers : 034 - RearArms Droplinks BilletMounts StrutTops : Eibach FrontArms : Powerflex Bushes
MRC - Stage2 Map+codeouts Stage2 Inlet+7mm gasket Stage2 deCarbon CAF : BMC Filter : Milltek Decats NonRes
Anthracite Alloys : Advan Neovas : Ferodo Pads+Castrol SRF : HEL Brakelines : Trups LED lighting
Re: De-coke???
You had other issues though, a decoke won't make that much difference.Bladerider wrote:Definately.
My car was making 328 bhp !!!
Now nearly 440 !!!
and didn't someone check their engine a year after having a decoke and found it was all coked up again? Unless you are going to have it done every year or managed to find a way to prevent / slow it down then it seems a little pointless to me.
Re: De-coke???
+1, feck that. I'm going the preventative route and giving my engine a good workout every time the oil's up to temp. I'm currently averaging 17-point-something lifetime miles per gallon and that's not from sitting in traffic. It's been a while since I've done the 3-8000 test but I'm fairly confident I'm not missing any horses.MikeFish wrote:You had other issues though, a decoke won't make that much difference.Bladerider wrote:Definately.
My car was making 328 bhp !!!
Now nearly 440 !!!
and didn't someone check their engine a year after having a decoke and found it was all coked up again? Unless you are going to have it done every year or managed to find a way to prevent / slow it down then it seems a little pointless to me.
Re: De-coke???
Did it today a few times! I actually landed between 8.5 - 8.8 everytime. Was actually abit worried it was time for a decoke on mine. But everything is in shape!manual_daniel wrote: A very good test - lots of good information here.
http://forum.rs246.com/viewtopic.php?f= ... 0+rpm+test
Audi RS4 Avant
[2014]: blacked out wheels & grill: center res delete : flaps open
[2015]: brembo & yellowstuff : michelin pss : h&r spacers
[2016]: sachs performance clutch : decoked : led there be light : black window trim
[2017]: stertman stage 1 : black headlights & clear corner mod : gruppe m air intake : gutted resonators
[2014]: blacked out wheels & grill: center res delete : flaps open
[2015]: brembo & yellowstuff : michelin pss : h&r spacers
[2016]: sachs performance clutch : decoked : led there be light : black window trim
[2017]: stertman stage 1 : black headlights & clear corner mod : gruppe m air intake : gutted resonators
Re: De-coke???
It makes a difference for sure. If your valves don't close due to carbon build up then you loose compression and hence power. I went from 398ps to 442ps post a Terraclean, MRC carbon clean and custom remap by Doug. I had no other issues with the car before and after, this was with standard cats a non res Milltek and everything else as stock. The car does over 193mph on the clock.
RS4 B7, Mugello Blue, K&W V3 & HR ARBs, set up by Centre Gravity, Milltek Valved Non Res & cat bypass pipes, BMC air filter, braided hoses, DOT 5.1, Terraclean, MRC Full Carbon Clean, MRC remap 448PS 477NM, 20" S7 alloys with 4mm spacers & Hawke spigots 66.6 > 57.1, AP Racing front discs. Sold Sept 2019. Now rocking an F80 M3
Re: De-coke???
About to buy a 2007 B7 with less than 21k miles and I'm a bit concerned about this carbon build up/decoking issue.
I get the impression the previous owner looked after/pampered this car (hence the low mileage) and hasn't driven/revved it hard enough to prevent carbon build up.
I'll get MRC to do a health check.
My question is on a car with so few miles is it unlikely to be an issue?
Many thanks,
CycleSi
I get the impression the previous owner looked after/pampered this car (hence the low mileage) and hasn't driven/revved it hard enough to prevent carbon build up.
I'll get MRC to do a health check.
My question is on a car with so few miles is it unlikely to be an issue?
Many thanks,
CycleSi
Re: De-coke???
I had a car with similar mileage and had no problems at all. Like you say though, it's more to do with how it's been driven rather than the mileage. An MRC health check ( and a regular "Italian tune") sounds like a great idea and if you get anywhere near 390 bhp, its a good 'un.CycleSi wrote:About to buy a 2007 B7 with less than 21k miles and I'm a bit concerned about this carbon build up/decoking issue.
I get the impression the previous owner looked after/pampered this car (hence the low mileage) and hasn't driven/revved it hard enough to prevent carbon build up.
I'll get MRC to do a health check.
My question is on a car with so few miles is it unlikely to be an issue?
Many thanks,
CycleSi
Re: De-coke???
Thanks for that.
As I say, I'll get MRC to check it out and hope it's in fine form before thinking about a Stage 2 remap.
As I say, I'll get MRC to check it out and hope it's in fine form before thinking about a Stage 2 remap.
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