by MH3.0R » Thu Nov 17, 2011 7:50 pm
The auto box is definitely the weakest link. It cannot handle the torque and the change points are all wrong for the current state of tune. I understand some people in the USA are working on the Transmission Control Unit mapping for the 5EAT gearbox. Along with the Valve Body upgrade, must have some TCU changes in order to get the benefit of the torque from 3500 to 6000. No point going out to 6800 before changing as the engine bounces off the redline (cutout).
On the Water to Air Intercooler, I am not tracking the car, and as it is my daily driver, I do not need max power/torque on tap at all times, so not sure whether to proceed. There are two schools of thought - higher intake air temps while engine water temps remain normal, can actually improve fuel economy. I guess one would have to tune for this scenario. The other school of thought is that high air intake temp suck power from the engine. While that is true, I rarely need power when I have high air intake temps as I always expeience that condition in start/stop traffic.
I will put my pennies into a second hand box rebuild and try to tap into the TCU tuning before I spend any more on obtaining more power.
MY15 Jaguar XFR-S 5.0 V8 SC 8AT White Saloon (Stock - nothing more to do with 400+ KW
)
MY11 Jaguar XFS 3.0DTT 6AT White Saloon (Prepped for sale)
MY19 Subaru XV 2.0iS the shopping trolley and weekend all terrain cruiser!