Mk5 specific results from the JKM RR day on 7th March 09

[Teutonic_Tamer]

There are one or two minor silver bits peeping through, but all-in-all it is holding up quite well

....Talking about your hair is bit off-topic isn't it Hurdy?

^^^^ PMSL

[Teutonic_Tamer]

Oh, and don't forget the other primary benefit of uprated intercoolers - check out the differences in the air temperatures between mine and Robins - and work out what I am on about. 

....On the printout, is "AT" the Air Temperature? Value 15 on yours and 13 on mine? What's it mean, please?

My AT was 11 in December and 13 in October - Both on JKM's dyno.

Thanks

I think AT actually stands for 'Ambient Temperature' (which is basically the air temperature).  That value, on its own isnt really important.  You actually need to compare the AT to the IT (which is 'Inlet Temperature') because this shows difference between the temperature of the air before the turbo has compressed it, and then after the turbo as compressed it (and therefore heated it up) - and how efficient the intercoolers are.

So, with mine, the AT is 15, whereas the IT is 18 - which means my S3 & Forge coolers have restricted the temperature rise to just three degrees (when will I see you again . . . .  :embarassed:  ).  But your AT is 13 (your AT is cooler than mine maybe because you went on the rollers earlier in the day, when it was a touch cooler), but your IT is 19.  That means that the standard GTI cooler is allowing a 6 degree increase.  So this shows a clear benefit from the uprated intercoolers.    Lower inlet air temperatures mean more power. 

Btw, T_T - I sent you an email (not PM)

Whoops - sheepishly fires up Outlook!

[Teutonic_Tamer]

Forge themselves powder coated it I asked them to paint it black not powder coat it, they (John) claimed it wouldn't effect as he put it the "thermal efficiency" or warranty.

I'll might have to ask them about this bearing in mind what you say. 


I paid £650 all inc plus £50 for the powder coating.

With regards the S3 cooler, I'll see how I get on with this maybe I'll need one with all the powder on it

I reckon John (or you!  ) might have confused the powder coating vs paint.  When I initially spoke to Russell from Forge, he carefully explained to me that they will only flash spray a very thin coat of black paint on their coolers - and when they sent mine, the paint was very thin - but is standing up well to the winter without a single chip.  Maybe you ought to speak to Russell. 

Ok just had a phone conversation with John at Forge:
Here are the main points discussed:


1) The cooler is powder coated. Russel at Forge speciifes that powder coating is to be a min of 0.1mm and a maximum of 0.15mm.
2) The powder coating is offered in place of the spraying as a) it gives more of a uniform covering and b) it will not flake.
3) Forge (Chris) has run back to back tests with powder coated and non powder coated coolers and found no signifcant effect on the cooling. (less than 1 degree c loss)
4) Anodising was considered but not chosen as it would have weakened the weave of the aluminium.

I guess this must be something new then, because they didn't offer it at last years Inters.

I'd be interested in comparing their paint and powdercoating finishes! 

[RobGTI]

Yes it is new. They don't offer the spaying service anymore. Can post pics but not sure they would be that useful for a comparison.

[Micky 32]

The Forge twintercooler is great, i'm running one along with full Milltek, Evoms, autotech fuel pump averaging 285bhp on a ko3 and pulls nicely up top to the redline. Even after a nice run if you pop the bonnett and touch the throttle body it's stone cold.