MRC Vs STOCK???

[Brownies3]

I'm about to have the same work as you've just had done Jack except for the Sachs clutch/flywheel, is the Sachs clutch mutch heavier than standard, does it make a big difference/improvement and do you consider it worthwhile. I would rather get everything done in one go so perhaps i should consider this upgrade at the same time.

[JackS4]

It is heavier than standard but you get used to it after a few days. The only reson I upgraded was my OEM was shot mainly because I drive in stop start traffic during the week and I wanted something beefier. That said, due to the lightened flywheel the engine seems to rev slightly quicker.

I would say if your circumstances are different to mine and you dont routinely need to launch the car (not that I do) the std clutch is probably fine.

J

[Brownies3]

Thankyou for that Jack, i do notice the limitations of the std clutch, it wouldnt be the first time i've launched and noticed some slip followed by a burning clutch smell. I dont use the car day to day, more of a fun weekend car, so living with a heavier clutch wouldnt be a big problem for me - was it very expensive to have it done, i think i might contact MRC if its not too much

Paul B

[JackS4]

I think it was about 1,300 + fitting (which is a box out job) + VAT.

J

[rs4mikek]

I had all of my MRC (clean, port, 100cels, remap etc) work incl Sachs clutch/flywheel done in one go and the difference is simply gob smacking. I have had turbo cars remapped etc in the past and depite those having a theoretically higher power gain, much to my astonishment the B7 RS4 was the only one which felt night and day different. NA tuning is a layering of small but expensive gains but for me at least worth every penny.

J

+1

had all the same mods although done in stages. Absolutely worth every penny !!!

[RSKiwi]

Just back from MRC

Car has 40k miles on the clock
Valved resonated Milltek
GruppeM Air filter

Nothing else getting done just a map. Porting and so on will get done when my Audi warranty expires in January

Ill let the stats speak.

Health check run
351PS 459NM @ 3575rpm (I nearly cried...but men dont cry..) Doug hooked up a boost gauge and it turned out I had a very minor air leak.

377PS 458NM @ 3341rpm with leak fixed

Re-mapped
391PS 476NM @3372 rpm


Mapped so same power both in sport and normal as the norm but with a linear throttle map in non sport. I kept the sport throttle map for the 'dramatics' more than anything else.

£650 as per MRC's website

I am more than happy with how this turned out as I have loads of simple (but time consuming) mods left for when out of warranty so I know I still have another step in grin factor to come. I was surprised at what a difference I felt today with just the air filter and exhaust mapped so roll on the next 40+ PS when I do the following:

Cold air feed
Gut the pre cats
Clean and Port

The only time Ill ever wish the warranty would hurry up and run out!

Cheers to MRC, they were professional, friendly and didnt treat me like an idiot so they will definitely be getting repeat business from me.

Oh and met a C5 RS6 owner Marcus who was a good lad he is floating around on here. Not often you see a sprint blue RS6.

[Jonesy07]

Does the map not void the Audi warranty anyway or can it not be detected ?

Great result and i am thinking of doing the same thing. Also how much better does the res sound than stock ? Thining of a valved res at the same time.

[RSKiwi]

Does the map not void the Audi warranty anyway or can it not be detected ?

Great result and i am thinking of doing the same thing. Also how much better does the res sound than stock ? Thining of a valved res at the same time.

From discussions with my local dealer (I have a good relationship with them) if its obvious that you have ditched a radiator, had the head off etc etc it would give them plenty of ammo to deny a claim however, if the car is producing below stated output even after a remap and you still have the car serviced at Audi and the internals havent been touched it is likely they would back most claims (possibly other than the ECU dying).

It is a risk but not as much of a risk as going the whole hog and getting everything done. My only real concern for the car is the DRC.

The exhaust is a tough one, lots of people love loud others just like louder than OEM and I fall into that category. I think the non res would be too load and intrusive for me when just cruising. When you stand on the loud pedal the res is definitely loud enough! Worth keeping in mind is that you can always remove the centre section of a resonated exhaust if you want it louder. In general I think it sounds much better than stock but then I also have the induction sound from the GruppeM which compliments it and definitely lets you know its sucking air.

[HYFR]

£650 for 14PS and 18NM

think I'd rather spend it on beer

[RSKiwi]

£650 for 14PS and 18NM

think I'd rather spend it on beer

In the end it was £650 for 40PS (air leak) and mapping in the GruppeM with its fickle MAF housing, dont forget that when I have the other work done the map part is huge amounts cheaper now that I am in the system so to speak....its all part of a grand plan.....not that grand....actually a few 'grand' in the end

I see your point though, when put in valuable beer currency it is about 9 beers at a London pub

Still I was grinning the whole way back!

[S14]

Not sure you would really notice a 15-20hp increase on a n/a car..maybe more about removing the torque limiter in the first 3 gears..i'd have saved my cash for some v power!

[Steve_C]

£650 for 14PS and 18NM

think I'd rather spend it on beer

Fair point, but that begs the question - how much more PS/NM would you want to make you happy to spend £650? Everyone's going to have different views and its subject to the law of diminishing returns of course.

[BTW I paid about £29 per each additional PS on mine which included a remap although the remap is more about useable power than about power gains.]

[neckarsulm]

How come the MRC dyno readings are at relatively low revs?

[RSKiwi]

How come the MRC dyno readings are at relatively low revs?

The power ones are at much higher revs, I should have added the rpm for peak power

351PS @ 6080rpm
377PS @ 7217rpm
391PS @ 7806rpm

[RSKiwi]

Not sure you would really notice a 15-20hp increase on a n/a car..maybe more about removing the torque limiter in the first 3 gears..i'd have saved my cash for some v power!

In the end it was 40PS.

I wanted the torque limiter off and I cant map that out so someone was going to charge for it so why not go to someone who is considered one of the best? Its not all about getting huge amounts more power as we are all aware that a NA car will not do this just on a map alone. Some people buy bigger turbos, injectors etc. I will have a mapped ported, cold air fed car in the end that will hopefully hit around 440+ PS. Those starting at a lot lower power in a different type of car will spend the same amount of cash that I will to get to 440. This is simply part one of a two part process....sequels always a possibility beyond the second....