DMS or Revo for RS4

Post by **Tomson** » Tue Mar 15, 2005 11:24 am

Just read my posting and am out of breath - I suggest a huge deep breath before reading the large paragraph.

I completely forgot to use fullstops, and regularly forget to close brackets.

D-

Post by **RS4_Barry** » Tue Mar 15, 2005 12:13 pm

And then how many have atuclly got 520bhp for their £12K.

Not me. And I am almost 100% sure that the remap on my 520 MTM chip is not a custom one. Minneah seems like a good guy and has a lot of knowledge and time for audi drivers - He offered to do mine. I would probably have had him do it if somebody else (Guess Who?) had not tried to put me off.

Post by **alastairg** » Tue Mar 15, 2005 9:34 pm

simple1 wrote:Will let others make their own minds up.... concensus seems to be that my comments are not off the wall.

What consensus ?..........................I believe Mihneas comments are informative and constructive to the tuning debate.
I spent a long time considering the options and after the Mihnea re map experience I have even more respect for his views. They are based on BTDT on many occasions. In private he does not rubbish other tuners. He just makes observations based on his knowledge.
It is simple. If you want a real custom re map he is the one at the moment in the UK.

Post by **DaveP** » Wed Mar 16, 2005 8:24 am

Ok...am I the only one who doesn't know what BTDT stands for ?

Is it "been there done that" ???

Post by **alastairg** » Wed Mar 16, 2005 9:58 am

yes

Post by **JohnW** » Wed Mar 16, 2005 10:41 am

I'm jumping in at this point as I have a few more questions relating to Revo.

Can anyone answer exactly what is being altered when you swap between the different boost and timing levels ?

What I mean is, what is the difference between low boost, high boost, etc.
Would low boost 9 give a higher boost than high boost 1 for example ?
What is different between low boost 8 and low boost 9 ?

Is the boost increased across the entire range for all settings, or do certain settings only affect certain parts of the rev range ?

This is the big stumbling block for me. While it may well be nice to have a bit of flexibility, it concerns me that so far no one I've spoken to actually knows what these different settings are really doing, and so the settings being used are as a result of the owners' own trial and error.

That doesn't inspire a great deal of confidence in me, which is why I'm asking these questions now.

Sita, nice chart that. I'd love to see one that compares the different settings on Revo.

Cheers all,
John.

Post by **JohnW** » Wed Mar 16, 2005 10:46 am

Just a thought.

I wonder if the low boost and high boost have a standard curve and the 1 to 9 give a certain amount of boost increase over this.

if this is the case, would that mean high boost 1 would give an actual very close to the requested ??

See what I mean ?
Who really knows what is going on when playing with these values ?

Cheers,
John.

Post by **sitas3** » Wed Mar 16, 2005 10:50 am

my understanding about the boost levels with Revo based on discussions with them is that the boost settings on the SPS3 device does not just alter the boost - they alter the engine load via timing/ignition also. How much I don't know.

I'll post a graph shortly showing the differences between the different settings.

One thing for sure. A high boost setting caused masses of knock - so much I could actually hear it and had to abort the logging run!

Post by **Tomson** » Wed Mar 16, 2005 11:05 am

MMMMMMMMMMMMMMMM. I have mine set at timing 5, h/boost 6, as mentioned earlier. Car pulls well and does not enter 'limp'. Simon, from your logging do you optimum RS4 SPS3 settings ?

Tom

Post by **DuncS3** » Wed Mar 16, 2005 11:19 am

There is a new SPS3 unit now that has different settings to the first generation SPS3 - I havent used it so cant comment much more than that but you dont need new code as far as I am aware - but according to this link they can alter fueling now...

http://www.revotechnik.com/products/pdf/sps.pdf

nice disclaimers too (although it is a US site)

Dunc

Post by **sitas3** » Wed Mar 16, 2005 11:27 am

here is a comparison of the Low boost settings - i only did low boost 1,2,3,4,5,6 and 9 as I ran out of petrol!

All logging done using timing 3 setting.

[img]modules/pnCPG/Coppermine/albums/userpics/10055/revolb1234569comparison.JPG[/img]

Post by **TarmacTerrorist** » Wed Mar 16, 2005 11:37 am

JohnW wrote:Just a thought.

Who really knows what is going on when playing with these values ?

Good witch of the North perhaps?

Post by **sitas3** » Wed Mar 16, 2005 11:55 am

Who really knows what is going on when playing with these values ?

I wonder!

Why is it we can get answers to some things related to tuning/lambda stuff on here, but we can't get an answer to how much boost the K04 turbos on the RS4 can reliably take? Surely people would want to know this - especially when most tuning involves cranking up the boost via devices which are known to fail even in stock mode!

Post by **JohnW** » Wed Mar 16, 2005 12:40 pm

TarmacTerrorist wrote:
JohnW wrote:Who really knows what is going on when playing with these values ?
Good witch of the North perhaps?

Well that explains it then. She isn't a registered user of this site - I just checked !
Your mission, should you wish to accept it is to track her down and get her to join so she can tell us all what is going on

Simon, another nice set of plots. Interesting to see that each requested plot is different, and that the actual seems close until you get to level 5 and above.

Post by **sitas3** » Wed Mar 16, 2005 1:00 pm

Simon, another nice set of plots. Interesting to see that each requested plot is different, and that the actual seems close until you get to level 5 and above.

yes indeedy. Question is why? does this indicate that the map can't control the N75 valve properly when the boost gets to interesting levels or is it the turbos run away with themselves when under high boost conditions?

Blackart stuff as usual!

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DMS or Revo for RS4

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