[s-cars] RE:Wastegate spring tightening

[Mihnea Cotet]

Guys,


Just a little info here: 28 psi all the way to 6k RPM and 25 psi up to the 
redline are both "suicidal" boost levels for an RS2 turbo.

Apart from being bad on the turbo itself (overspinning at high RPMs), it's 
also totally unefficient and turns the turbo into a large heat pump. 
Efficiency must be close to 40% at these sort of boost levels and such high 
RPMs. Which means that your cars will be making lots of power at relatively 
low RPMs (4k to 4.5k) and then the power will simply tail off, because of 
the increase in heat on the intake side, and also because of the stupidly 
high backpressure levels in the exhaust, which in turn makes the engines 
ping a lot easier, so the ECUs will dial the timing advance back to keep 
the engines from knocking.

Together with my german tuner colleagues, we have a phrase to sum all this 
up: manchmal ist weniger mehr, or in english: sometimes less is more.

Just a thought...

HTH,

Mihnea