DMS or Revo for RS4

Post by **sitas3** » Sat Mar 12, 2005 12:40 pm

BTW this is what Vag-com is good for. This is a comparison of boost levels between a few tuners. My suggestion to look out for boost levels is based upon data such as this. Which would you rather have? 430bhp ish from a remap which is using higher boost levels continuosly and seems to produce abnormal noise, or a remap which produces the same or more bhp but using less boost?

Turbo failure can occur to all cars - i'd say that a large proportion of it is due to the way the car is driven.

[img]modules/pnCPG/Coppermine/albums/userpics/10055/revomrcmtmstockboost.JPG[/img]

Post by **sitas3** » Sat Mar 12, 2005 12:50 pm

lengster1 wrote:How do you know when you have got a revo set up correctley,surely there are optimum settings that are recommended?would i be right in thinking that the system is very similar to power commanders on bikes?

don't know what 'Power Commanders' are but with remaps, my experience has been that tuners look to ensure there is not excessive detonation and fuel trim with the remaps.

I've asked this before, but seemingly I can't seem to find out what the maximum operational limits for the boost levels on the K04 turbos are on the RS4.

Post by **Tomson** » Sat Mar 12, 2005 3:07 pm

Simon,

Must organise a time so you can show me the way forward, I would certainly be very interested in learning more.

In fact as I am sure many others would be also - it would be very interesting to actually understand what is happening with car.

As I am sure most people will agree the car can feel very different depending on so many things, mood, weather, wife etc etc so it would be good to determine if anything actually changed with the car.

Maybe we could organise some kind of pub/hotel meeting for a few of us and we can all learn together and discuss ?

Any thoughts anyone ? I know there are a few guys who have done a lot of logging but I for one, have never got involved because I do not really understand. Would love to change this.

Tom

Post by **DaveP** » Sat Mar 12, 2005 3:31 pm

Wow...thats interesting to see Simon...thanks for posting!

Any idea whats happening when there's more actual boost than requested ???

Also....the max reached by REVO...is that down to VAG Com reaching it's max boost measurement ? (ie, could actual boost be higher than what is graphed ?)

I agree...would love an afternoon meet with some VAG com basics...

Ta.

Post by **bobjebb** » Sat Mar 12, 2005 3:43 pm

would be interested in that... If someone would be happy to do a Playskool lesson on the subject. I have heard no noises, but will listen carefully. I presume when my 5 hour trial is up all will be back to standard? This is what I was told... Anyone here had the trial - is there any sign to tell you when it's all over apart from any performance difference?

Simon - do you know Rob at DMS? He's who I've been told to call if I take it up.

Post by **bjacks** » Sat Mar 12, 2005 3:51 pm

Thanks for the quick lesson Simple

I know that there is far more to fueling than just adding more air, but I was surprised that you could get 130BHP from just changes in fueling, timing and exhaust.
If that's the case, why don't the usual RS4 tuners use this method?

Cheers

Ben

Post by **RED_ROCKET** » Sat Mar 12, 2005 5:30 pm

I have revo...and after reading all that i am confused!! Should i be worried???

Post by **DuncS3** » Sat Mar 12, 2005 5:52 pm

DaveP wrote:Also....the max reached by REVO...is that down to VAG Com reaching it's max boost measurement ? (ie, could actual boost be higher than what is graphed ?)

Yes, you cannot measure over 1.55 bar so vagcom just shows a flatline

Dunc

Post by **DaveP** » Sat Mar 12, 2005 7:01 pm

Bob...you may hear the sound people are referring to if you do a roll-on in fourth gear....start from 2000/2500 revs in fourth and floor it
until either you hit the redline, you run out of bottle or the road runs out...

I used to hear the noise at about 4000 revs I think...

Post by **simple1** » Mon Mar 14, 2005 8:19 am

bjacks wrote: If that's the case, why don't the usual RS4 tuners use this method?

Cheers

Ben

Mostly becasue the quickest results are obtained by increasing boost.

Post by **FrankC** » Mon Mar 14, 2005 9:10 am

So who has gone the MRC route from REVO.
And how do the two compare?
Do MRC offer serial port tuning or is it a re-chip?
Thanks in advance
FC

Post by **RS4ge** » Mon Mar 14, 2005 9:56 am

sitas3 wrote: Turbo failure can occur to all cars - i'd say that a large proportion of it is due to the way the car is driven.

Other than thrashing from cold can you expand - never had turbo car before!

Post by **sitas3** » Mon Mar 14, 2005 11:02 am

Other than thrashing from cold can you expand - never had turbo car before

well number one must be the thrashing from cold as you suggest, but in addition repeatedly thrashing a tuned car on full boost (ie track days) - especially without letting the unit cool down sufficiently by turning off the engine straight away

Post by **sitas3** » Mon Mar 14, 2005 11:11 am

DaveP wrote:Wow...thats interesting to see Simon...thanks for posting!

Any idea whats happening when there's more actual boost than requested ???

Also....the max reached by REVO...is that down to VAG Com reaching it's max boost measurement ? (ie, could actual boost be higher than what is graphed ?)

I agree...would love an afternoon meet with some VAG com basics...

Ta.

Dave, strange boost profile isn't it? requested is just short of 1.5 bar but as you can see the actual boost is well above (ie it doesn't fluctuate around 1.5 bar, it is a straight line). This happens on another car also. Why i don't know.

My suggestion to keep an eye on the boost levels is based on this (and that is on low boost 9 setting) - the ecu only reports a certain boost pressure as Dunc suggests so the actual boost profile as in my chart above could be 1.9 bar of boost for all I know.

It really would be great to know how much boost these turbos can safely take.

I think the Revo code on the RS4 needs rethinking. Other than that, I think the Revo is a great option - switchable, serial port tuning and with the ability to fine tune the ignition timing and boost.

Post by **DaveP** » Mon Mar 14, 2005 11:14 am

FrankC wrote:So who has gone the MRC route from REVO.
And how do the two compare?
Do MRC offer serial port tuning or is it a re-chip?
Thanks in advance
FC

I have gone this route...I posted about it a while back in the RS4 forum. MRC is not done serially, although I know Mihnea was working on something that wouldn't require the chip to be removed from the car.

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DMS or Revo for RS4

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