All Things Mk5 > Performance Modifications

Is an S3 Intercooler enough !!!

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Carrera2RS:
It would seem top is THS, 2nd twintercooler, 3rd S3.

I am yet to be delighted by my twintercooler, but I am at REVO tomorrow to see why it feels less responsive than before fitting. I'll report back, if I had my time again I'd go straight for the THS

JohnBoy got it right  :smiley:

Jaywoo-GTI:

--- Quote from: Carrera2RS on June 21, 2011, 08:21:35 am ---I am yet to be delighted by my twintercooler, but I am at REVO tomorrow to see why it feels less responsive than before fitting. I'll report back, if I had my time again I'd go straight for the THS

--- End quote ---

Bigger area to fill with air compared to standard so will result in more turbo lag. Revo should ba able to adjust your settings to make it better.

Carrera2RS:

--- Quote from: Jaywoo-GTI on June 21, 2011, 09:00:55 am ---
--- Quote from: Carrera2RS on June 21, 2011, 08:21:35 am ---I am yet to be delighted by my twintercooler, but I am at REVO tomorrow to see why it feels less responsive than before fitting. I'll report back, if I had my time again I'd go straight for the THS

--- End quote ---

Bigger area to fill with air compared to standard so will result in more turbo lag. Revo should ba able to adjust your settings to make it better.

--- End quote ---

Sorry to say, this does not appear to explain the performance, lag via this level of volume increase is potentially a miconception. I had a long conversation with a friend who is probably one of the best UK race engine mappers and veryexperienced with turbo motors (Including Lemans). Okay a different league to road cars, but he said to me categorically on a turbo motor of this configuration the increae in volume will not be noticeable.

Do a little match and even at 3,000 rpm the GTi will be consuming 50+ litres of air, I don't know how many litres the full inlet track is but the upstream impact will be very little in additional time to fill. The other point is that the reduction in pressure differential will go down and hence the required boost at the turbo to meet inlet boost will be slightly less

I hope Revo can bring back the 'drive' pre intall  :happy2:

E30Dom:
But surely a BIG intercooler with more surface area/vanes will have more effect on slower moving air than it would on faster moving air...

I think it's just at that point where airflow has been effected by the cooler, whereas it wouldn't be affected if the air was alreaady moving faster through/before entering it... if ya get what i mean...

Dom

(good luck if you do - not 100% in own mind lol!)

johnboy07:
Forge say that there cooler doesnt actually cause any more lag. This is beacause although you are adding extra pipework you arent actually increasing the distance the air is having to travel.
It works along side the standard cooler, adding air at a cooler temperature but surely this will mix with the air from the standard cooler which is less efficient and hotter so the air temp just averages out. I wasnt convinced on that piece of information but like said although it may cause a slight extra bit of lag if any at all, it would not explain lower performance feel or any flat spots. As once the turbo is spinning and the air is there the flow should stay constant and therfore so should the power.
From what i remember you saying on the rr day you are running low ish settings. I would imagaine and be near certain that after some tweaking of those settings to accomodate the cooler you will be more than happy again. Mine for instants is running quite high settings of B9T7F5 so will be interested of how they adjust. keep us informed

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