RS4 B7 performance .......

[Por911T]

Last week I took delivery of a 2007 07 RS4 saloon with 2200 miles on ..... what a car ! Outstanding in all repects ... well almost . Having come from a 996 turbo I knew that it was never going to be just so earth shatteringly quick but I feel that it lacks' the killer edge ' in term of performance . Dont get me wrong the car is truly outstanding and quick - but not as ' balls out ' quick as I was expecting . Will the car loosen off with more miles on ?? It is worth chipping ?? Anybody else feel the same ??

Youur feedback is appreciated -Thanks Barry ( ps what a sound track !)

[RS4john]

It is worth chipping, Will at http://www.p-torque.co.uk
is very good and gives 24BHP.
You will notice the difference.
The engine does get better with miles anyway.

[kayc]

Por911T said:

Last week I took delivery of a 2007 07 RS4 saloon with 2200 miles on ..... what a car ! Outstanding in all repects ... well almost . Having come from a 996 turbo I knew that it was never going to be just so earth shatteringly quick but I feel that it lacks' the killer edge ' in term of performance . Dont get me wrong the car is truly outstanding and quick - but not as ' balls out ' quick as I was expecting . Will the car loosen off with more miles on ?? It is worth chipping ?? Anybody else feel the same ??

Youur feedback is appreciated -Thanks Barry ( ps what a sound track !)

I had exactly the same opinion when i first got mine after getting out of a 911 turbo..i think the main reason is that you have to rev the audi hard compared to a 911 turbo and keep it above 5000 rpm to move along at pace.(Not easy to do after years of 911 turbo ownership where i saw no need to take the car above 5500rpm ever with so much mid-range torque.)In all fairness i think the audi is a heavy car and to get it travelling at pace you have to keep momentum up and rev it fairly hard.

[jackwood]

The standard mapping only gives max 50% throttle below 5500rpm in first 3 gears. This must have a massive amount to do with:

1) Why standard cars can feel underwelming compaired to similar "powered" cars
2) Why a re-map makes the car feel completely different (I am presuming this throttle limiting is removed during re-maps?).

[Por911T]

Thanks as ever guys for the feedback - Thanks to 'Kayc' who like me has just come from a 911 turbo into an RS4 . I am getting the car chipped as I really thought it would have had more ooomph but maybe therein lies the problem - coming from a turbo charged car into a normailly aspirated one . I guess the RS4 needs to be driven hard and revved hard as opposed to one with a ' blower ' . Love the car but just feel a tiny bit disappointed at the performance .

[LaSarthe+Back]

Por911T said:

Thanks as ever guys for the feedback - Thanks to 'Kayc' who like me has just come from a 911 turbo into an RS4 . I am getting the car chipped as I really thought it would have had more ooomph but maybe therein lies the problem - coming from a turbo charged car into a normailly aspirated one . I guess the RS4 needs to be driven hard and revved hard as opposed to one with a ' blower ' . Love the car but just feel a tiny bit disappointed at the performance .

turbo!

[DoctorD]

Barry, follow my thread over on RS246.com about disconnecting the exhaust valves (the thread title is called - Much Better). For some reason Audi have strangled the RS4's performance at lower revs, both in terms of the ECU inhibiting full torque until later in the revs, plus the exhaust valves remaining closed just when you need the torque. If you take a look for yourself the valves act on an unsilenced pipe that passes through the rear silencer, when this blockage is removed the pick-up and low-end performance is notably improved - as is the exhaust sound.

Further ECU tuning can only add to this, and remove some of the flat spots.

It's a pity Audi were so cautious, and you'll probably find like me that an RS4 with valves left open is a much more complete car.

Edited by DoctorD on Tuesday 13th November 10:30

[RS4john]

jackwood said:

The standard mapping only gives max 50% throttle below 5500rpm in first 3 gears. This must have a massive amount to do with:

1) Why standard cars can feel underwelming compaired to similar "powered" cars
2) Why a re-map makes the car feel completely different (I am presuming this throttle limiting is removed during re-maps?).

You presume right.

[jackwood]

RS4john said:

jackwood said:

The standard mapping only gives max 50% throttle below 5500rpm in first 3 gears. This must have a massive amount to do with:

1) Why standard cars can feel underwelming compaired to similar "powered" cars
2) Why a re-map makes the car feel completely different (I am presuming this throttle limiting is removed during re-maps?).

You presume right.

So why did they do it? Is this just one of those things where they artificially limit the performance so that next year they can use the same engine, drop in a revised map, and hey presto a "new, uprgreaded engine" that has cost them precicely £0 but is going to make the customer chop in the old "slow" wheels for the new "faster" ones?

Or is there a legitimate reason for it, like it reduces stress and strain on the engine?

Jack

[RS4john]

jackwood said:

RS4john said:

jackwood said:

The standard mapping only gives max 50% throttle below 5500rpm in first 3 gears. This must have a massive amount to do with:

1) Why standard cars can feel underwelming compaired to similar "powered" cars
2) Why a re-map makes the car feel completely different (I am presuming this throttle limiting is removed during re-maps?).

You presume right.

So why did they do it? Is this just one of those things where they artificially limit the performance so that next year they can use the same engine, drop in a revised map, and hey presto a "new, uprgreaded engine" that has cost them precicely £0 but is going to make the customer chop in the old "slow" wheels for the new "faster" ones?

Or is there a legitimate reason for it, like it reduces stress and strain on the engine?

Jack

Well it has been discussed much on RS246, and general concensus is the engine is "De-tuned" to accomodate low grade fuels throughout the world, we here can remap and remove the exaust flap with good results, giving 436 ish power and much improved torque range, this makes the car much more low down powerfull, and generally more flexable in delivery.

[DoctorD]

My experience from recently joining the Audi fold is that they are a very conservative company. The engine we have discussed, the invasive TC and ESP seems overdone for such a balanced 4WD chassis, and I even discovered recently when setting out to dry my brakes after a wash that riding the brakes whilst accelerating (to warm up the discs) isn't possible, the ECU shuts down the throttle if you brake. So no left foot braking allowed either...

[jackwood]

DoctorD said:

I even discovered recently when setting out to dry my brakes after a wash that riding the brakes whilst accelerating (to warm up the discs) isn't possible, the ECU shuts down the throttle if you brake. So no left foot braking allowed either...

Just the same as current Porsche cars then on that front.

[lambogenie]

the reasons aren't nearly so exciting, its all down to EU emissions and drive by noise regs. its the same reason Lambo, Aston and Ferrari are all having to fit butterlfly valves in the exhausts. you have to drive past a microphone at a certain speed in a certain gear and not break the Db limit, the same applies to the emmissions regs which are measured in a certain way. all the performance companys are now having to put in special maps and exhaust trickery to get round the rules otherwise none of the cars on sale at the moment would actuall meet type approval or would be so quiet that nobody would buy them.

[nick555]

spoke to p-torque about the rs4 remap, theyve got a special offer on at the moment , am very tempted!!

[DoctorD]

How much?

[nick555]

doctord - have mailed you