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Its stock internals except exhaust cam, on 0.9 bar still just as response and enough power. Its IT 50, what does all that stuff mean? BP:99.0 RH:25 AT:39 IT:50 RR:013 TN:3.768 CK:726? I have heaps of wheel spin all the way through first gear, does anyone now how to best set up the car and what tyres to use to get more grip. I have tein super street coilovers set 3cm lower and its shocks at 8 out of 16 also have whiteline handling kit with sway bars and bushes to reduce camber by 0.75 degrees in rear.

Reedy very nice, are the internals of your RB25DET standard?

Can anyone tell me how their GT-RS performed at lower boost such as 0.8 or 0.9bar, apart from lower power output, still responsive?

Boost i got 210rwkw on 0.8bar which is pretty much standard boost. on that it seems a little laggier but top end it still goes.

Its stock internals except exhaust cam, on 0.9 bar still just as response and enough power. Its IT 50, what does all that stuff mean? BP:99.0 RH:25 AT:39 IT:50 RR:013 TN:3.768 CK:726? I have heaps of wheel spin all the way through first gear, does anyone now how to best set up the car and what tyres to use to get more grip. I have tein super street coilovers set 3cm lower and its shocks at 8 out of 16 also have whiteline handling kit with sway bars and bushes to reduce camber by 0.75 degrees in rear.

IT = Inlet Temperature

AT = Ambient Temperature

RH = Relative Humidity

RR = Ramp Rate

BP = Barometric Pressure

CK = Check sum (formula to validate these settings)

Re traction problems, Teins, what's the rear spring rate? Usually I find it WAY to high. Anything over 200 lbs per inch (3.5 kg/mm) is too much.:P

The engine light will also come on if your AFM maxes out. If you are running 1.3 bar with the standard AFM then it will max out for sure.

Just took it out for a run now, first cold night since i got it. on 1.3 bar boost at high rpm engine cut-out light comes on, was told that this is pinging although i cant hear anything. going to run it back on dyno to set timing back a few degrees.

I am sure thizzle made 250kw @ 1.3 bar, it is impossible to make it at 1 bar.

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    • This is why I gave the disclaimer about how I drive in the wet which I feel is pretty important. I have heard people think RS4's are horrible in the rain, but I have this feeling they must be driving (or attempting to drive) anywhere close to the grip limit. I legitimately drive at the speed limit/below speed the limit 100% of the time in the rain. More than happy to just commute along at 50kmh behind a train of cars in 5th gear etc. I do agree with you with regards to the temp and the 'quality' of the tyre Dose. Most UHP tyres aren't even up to temperature on the road anyway, even when going mad initial D canyon carving. It would be interesting to see a not-up-to-temp UHP tyre compared against a mere... normal...HP tyre at these temperatures. I don't think you're (or me in this case) is actually picking up grip with an RS4/AD09 on the road relative to something like a RE003 because the RS4/AD09 is not up to temp and the RE003 is closer to it's optimal operating window.
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