21 Jul 2021
MotorheadThat’s the great thing about turbo engines Ralph … relatively straightforward (and cheap) to tune in terms of horsepower/£. It looks as though Stage 2 is just BMC filters, a new downpipe and a custom remap? From what I’ve heard the main limitation is cooling/heat dissipation? Probably more of a challenge with the mid engine layout, although the likes of McLaren, Ferrari, etc. don’t have problem, though they’ve been designed from scratch for a turbo layout. Jeff
KaiInteresting post and very much in my wheelhouse. I have a Cayman F4 base model - 2.0 litre turbo which I have been “improving” for some time. it Now has 400bhp and 378lb/ft and - along with some more standard upgrades - I have recently fitted the front (3rd) radiator from the GTS models to get the water/oil temps down and a water/methanol injection kit to keep the intake temps down. Previously both water and air temps had been high on track and I could feel the car reigning in power due to engine bay temps. Even a short session on the rolling road would see power dropping. I can confidently state that the combination of the extra rad and the water/meth kits have down wonders - last track day absolutely no problems with temps or power drop. Perhaps something to add to the discussion as I dare say the S models are very similar to mine - just a 2.5 litre and variable turbo. I’ll be interested in others’ views. Kai
TDT I believe the 2.5 GTS actually has a larger turbo also…… I.e. Larger than the S.
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