All Things Mk5 > Performance Modifications

Somebody please explain intercoolers to me…

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breeze:
My rough understanding,

OEM - Fine for stage 1 tunes on a K03
S3 - Default choice to around 350 bhp / 350 lbft on a K04
THS - I don’t see these anymore but Darkside appears to sell a copy, as does Pumaspeed on eBay. Perhaps more like 400 bhp / 400 lbft, so a not too expensive step up on the S3 cooler.
Wagner etc big money coolers - High end builds / trackdays and so on.

Is the above correct?

Yes, I know I have made the cardinal sin of not talking about charge temps. I do realise that ICs are more about repeated pulls and ambient temperature. If it helps, overlay UK weather but with the potential for the odd track day.

K03 car, just trying to understand the options longer term.

breeze:
I am thinking a THS clone for a K04 car that does the odd track day feels like a good compromise.

rich83:
OEM with plastic ends is fine up to about 320bhp so plenty good enough for a a stage 1 ko3

breeze:
Thanks for that.

I wasn’t that clear - longer term would be a K04 swap!

pudding:
S3.  Don't need any more than that.  I've done extensive data logging and not seen any weaknesses on a predominantly road car.

Those big Wagners and the like are more suited to hybrid/big turbo builds and 1/4 mile action.

You forgot about the 'Welly cooler' option, which is basically just a (really) cheap ebay clone IC, but obviously you will be aware of the relationship between IC volume and lag.

Stock GTI one is OK, but it heatsoaks easily with remaps.......which is the main problem, because too many maps push the turbo way out of it's efficiency zone, which essentially just turns it into a giant hair dryer, doubling the thermal load on the IC.

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