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Hi guys can anyone recommend a company to do a good job on a carbon clean on my rs4 I'm in Wales, and a ruff costings involved thanks.

MRC are doing mine tomorrow, they are in Banbury. They do different levels of cleaning so best to call them and discuss.

I can recommend TRD in Stroud. Bit closer to you as well.

If you're nearer North Wales then Unit20 at Ellesmere Port are a great shout. If you're in South Wales then Ricky at REPerformance in Swindon is also available.

Thanks guys do u no a ruff prearranged on costings involved to completely clean it out, I'm in South Wales by the way and is Thare any way to tell if it needs doing before I commit to traveling up.?

Put it on a rolling road and that will give you an idea of how good/bad it is.

MarkV8 wrote:Thanks guys do u no a ruff prearranged on costings involved to completely clean it out, I'm in South Wales by the way and is Thare any way to tell if it needs doing before I commit to traveling up.?

To be sure, you have to take the inlet manifold off and have a look. Consider the time, effort and cost involved though.

To be a bit less sure, you could try to get a borescope in to have a look. I couldn't figure out how to easily do this though.

You can also dyno the car, as suggested, to get an idea of the health of the car.

Alternatively, if you have a vagcom or an OBD2 dongle and app on your phone, try measuring the peak MAF reading as you take the car to redline in 2nd gear. As a (very rough) rule of thumb, you can guesstimate your horsepower by dividing the MAF reading by 0.8. The caveat being that this works with a standard airbox, but if you have an induction kit, the MAF readings might read a lot higher. As carbon builds up over time, the airflow reading will drop.

Finally - make sure you go into this with full knowledge that carbon WILL return, probably quicker than you'd expect!

FaisalJ wrote:

MarkV8 wrote:Thanks guys do u no a ruff prearranged on costings involved to completely clean it out, I'm in South Wales by the way and is Thare any way to tell if it needs doing before I commit to traveling up.?

To be sure, you have to take the inlet manifold off and have a look. Consider the time, effort and cost involved though.

To be a bit less sure, you could try to get a borescope in to have a look. I couldn't figure out how to easily do this though.

You can also dyno the car, as suggested, to get an idea of the health of the car.

Alternatively, if you have a vagcom or an OBD2 dongle and app on your phone, try measuring the peak MAF reading as you take the car to redline in 2nd gear. As a (very rough) rule of thumb, you can guesstimate your horsepower by dividing the MAF reading by 0.8. The caveat being that this works with a standard airbox, but if you have an induction kit, the MAF readings might read a lot higher. As carbon builds up over time, the airflow reading will drop.

Costs at MRC:

- Health check on dyno £82
- Basic carbon clean £600
- Full carbon clean £823

Do not be tempted by the cheap hydrogen cleans (e.g. enginecarbonclean or terraclean). They've been tested on the forum, and do not deliver on their promises.

Finally - make sure you go into this with full knowledge that carbon WILL return, probably quicker than you'd expect! You can try to keep it away for longer by frequently redlining the car, but you can't stop it altogether, unfortunately.

If it hasnt been done in the last 5 days it probably needs doing.

Ok thanks for the advice, greate read it would be so mutch Easter if something eg like a filter etc was inventid to Even lower thiss Carbon problem, but u no wot they say big cars big bills.

Walnut blasting works on BMW Minis (N14 found in the fJCW), I think that cost circa £250 by main dealers?

Wonder if anyone has tried that with the RS4?

zainster wrote:Walnut blasting works on BMW Minis (N14 found in the fJCW), I think that cost circa £250 by main dealers?

Wonder if anyone has tried that with the RS4?

thats right, walnut seems to be the best, the cost with the rs4 is the labour involved in getting the inlet manifold off, i think.

Maybe this?

http://www.forteuk.co.uk/product-detail ... ve-Cleaner

Used by SW Autos to very good use for carbon cleaning going by this thread on pistonheads. ..


http://www.pistonheads.com/gassing/topic.asp?t=1522030

Top man hay having a read of that thread that company is cheap for a carbon clean as well as a map 350 plus vat, I wounder if thiss chap really nows wot people charge to do a carbon clean.

Just read the ph thread and looked at the guys website. All looks right, just can't see how they can do all that for the money.