B7 RS4 Rolling Road Day 18th April 2009 (Free of Charge)

[Andyuk911]

I will only leave this here for a short while.

Would I be posting if my car had reached 320bhp .. properly not ..

Points to note.

1. Surrey Rolling road ... is this a generous dyno ?
2. When I ran the car in I used the elastic band method whenever I could.
3. My oil was changed at 2,500 miles and then every 5,000approx thereafter.
4. The oil was only 3-4k miles old at the time of the dyno run
5. Always been run on Shell V-Power plus a little Tesco99 .. on the day it had BP Ultimate in it.
6. Was a warm day ... did this help the tranny ...?
7. I assume the car is running 0080 ... as it has had one ECU update.
8 No remap, but has a ITG foam filter
9. Exhaust valves disconnected
10. SR71's car was identical to my car on the day .. but had slightly more torque.



The vid here

http://www.youtube.com/watch?v=7uM8jpQoEfI

[Gazzer68]

Thats one smooth power curve, alot on sat had a more pronounced leap at 5200rpm

[rAudiguy]

Gareth, just so you know I have spent alot more than an hour or two on rollers with my car. I can tell you now that the air filter does make a difference but to be honest mate it's only 1-2 bhp. the biggest difference you will see is if you change tyre pressure's but what are you gaining from that. Also seems a little pointless to run on a different roller is you are looking to compare Saturday's results. Unfortunalty the bottom line is your car is under producing as Nick says I'd save your money for now and let Audi check the car over as a starting point.

Of course you can do what ever you like, but as Rob says there are so many varying factors which is one of the reasons we ran our car side by side so it could be as fair as possible. as in air temp, humidity engine warmth, gearbox temp etc.

good luck though and let us know how it all goes.

regards

Jim

[Dom81]

Thats one smooth power curve, alot on sat had a more pronounced leap at 5200rpm

My thoughts exactly, and can't really be down to Surrey vs Paramount, tyre pressure, age of oil, temp etc (or can it?)

My valves are disconnected (as were many on Sat) so might it be a 0080 vs 0090 thing?

[rAudiguy]

Or Andy's special rocket 108 racing fuel.......... lol

Ok so same deal as Andy I will leave these up for a while

Here is a plot of my car, this was stock car with Milltek



After custom Map from Paramount



And then this one is show's what happened when I did the de-cat. with a re map it lost power from before. went from 398 to 382 then after new custom map up to 408.5 and has since got a tad better.



Fot some reason my power curve on saturday had more of a jump where as here it was much smoother no idea why that is.

enjoy

Jim

[P_G]

Perhaps because your Bosch motronic unit/s have reverted back to some of its original software rather than using the stuff Paramount put in. It looks like Paramount's maps use redundant tables rather than altering the OEM tables and put chain code in to point the ECU in the direction of the new tables but sometimes the chain code can become unreadable (like my pre-edited post! ) by the management system and it will divert back to its original path settings.

[rAudiguy]

Very possibly Greame yes. Might re flash it with a before and after again and see what heppens in the name of science and all that Jazz.....

[Andyuk911]

Hi P_G

I have a RS4 0080 std map .. ( I can email it to you ..)

I have been running http://www.epifansoft.com/phpBB2/index.php

What offset is the table ?

Perhaps we can have a chat on the phone?

PM a land line number ...

[P_G]

Andy,

Sure we can have a chat but I have just about parted with all my remapping knowledge! I was very curious to see how remapping worked so when I agreed for REVO to remap my old S4 at Weltmeister at Silverstone they took me through the whole process whilst my car was on a dyno and they were custom tuning it and told me what they were doing to the ECU's, how that would affect the car and how I could diagnose if there were faults with the remap from r/r data in the future.

I am by no means a guru but can occassionally see why maps have gone wrong / not produced what people expect them to. What I forgot to ask on Saturday is if Paramounts remap also has an accesibility backclick function because the Bosch Motronic units also have an access log on them. If your on board one doesn't match with Audi UK's history log, i.e. the car shows its OBD II has been accessed more times than Audi has done it kiss your engine warranty goodbye.

[Andyuk911]

P_G you have pm

Like minds .... I am only interested in how it works .. I was going to diag my wife's Clio(TCE- Turbo)

I am pretty sure Audi never look at that data ... I only know of one engine that went pop .. it was an ex-Audi trackday car in South Africa ...

[P_G]

When it comes it engine faults they do, moreso if the car is modified otherwise. Remaps on the whole are good however if your engine goes pop the first things they do is check the accessibility counter and look at the last 20 parts of the machine code sequence to see if it is OEM as this is usually the part that mappers alter.

Your standard tech won't know but Master tech's do.

[Andyuk911]

Arr .. but a master tech said he could fix a car by a Dyno plot ... optimistic or what ....LOL

[rAudiguy]

Guy's just to up-date you, Paramount are waiting on a new printer, as soon as it comes they will send me the plots.

Sorry for the delay.

regards

Jim

[PetrolDave]

judging from the times/speeds magazines (and owners) have gotten from the car, imho it makes the 414 HP...

I've been trying to make the same point here for months Arthur.

Wheel dyno runs are interesting for deltas (changes) but IMHO are useless at determining absolute figures.

I 100% agree the only way to do that is with timed runs on a strip.

But people see a low number from a wheel dyno and get concerned...

[Dom81]

But people see a low number from a wheel dyno and get concerned...

I think the only people who are concened are those whose cars were very different from the norm - that was the benefit of running a bunch of (near) identical cars

Agree that dynos struggle to give accurate absolute values (and that other variables were at play between cars) but surely the relativity means something?