RS246.com Forum :: The World's #1 Audi R, S and RS Enthusiast Community

I'm booked into a RR at Awesome GTI which only has one fan, but i've got RS4 intercoolers on my S4.

They've told me it's a fierce fan which creates up to 90mph flow, but i've no idea how much area this will cover, ie: whether it will have a wide enough area to cover both ic's. I suspect not.

Can anyone suggest anything which may help aid the cooling?

Would angling the fan across the front of the car slightly (as opposed to facing it straight on) be beneficial?

Would it be better to just concentrate all the cooling on one intercooler?

if its a moveable fan then try not to have it too close..it mite flow more air through them that way..but im sure they no what there doing..

Ask them if they can put a wedge shaped 'splitter' in front of the fan - dead in the middle, so it diverts the flow to either side of the car.

Seen this lots of times. waste of time mate. get them to watch the intake charge temp on the run. Did this on 5 different sets of rollers with my car had RS4 IC's. it will go through the roof... Can be done with VAG-com.

Yep - both times my car has been on the rollers the IATs went thermonuclear. Don't expect a realistic reading from the dyno with SMICs - add another 15-20bhp on to the dyno results for the open road.

Couple of years ago saw between 290bhp and 380bhp difference. LOL would run some logs of the intake temp on the open road before the day. then you can see if there fans are up to the job...

S4TAN wrote:Ask them if they can put a wedge shaped 'splitter' in front of the fan - dead in the middle, so it diverts the flow to either side of the car.

I had thought of nicking an old train snow plough!

BRETTCOLLINS wrote:get them to watch the intake charge temp on the run.

I was planning to do my own logging during the runs. Can high IAT's do any damage, or will the ECU just pull back the timing/fuelling to compensate?

On my car the ECU just backed everything off.

Brett did the IAT's improve after you fitted Water injection?

When I was running RS4 IC's yes the water injection was a must, made so much difference. Still helps with the FMIC now too

Any ideas of what sort of IAT's you need to be running before the ECU will pull everything back?

Sorry No idea......

If it's any use, at Thorney in November, my IAT's hit 90 deg, and that was with two movable fans directed straight into the standard side-mounts.

time for an FMIC..

@ s4woody. I wonder who sells those ?

My AIT's were high at Thorney & every other RR too SMIC's do not cope well there but are much better on the open road i.e. the gap is far less in performance terms. Like S4TAN said earlier, if you have good SMIC's on your car, you need to add bhp & torque to the RR peaks to get realistic on-road figures.