Firstly, the â??stock throttle body optimizationâ? instructions found on the mods page of this site could be substantially improved, more on that latter.
I did the following:
(1)half-shafted the SVT TB shaft by cutting the stock shaft
(2)machined the rear half shaft to a rounded 1/16â?
(3)countersunk the TB plate flush to the modified half shaft
(4)knife edged the TB plate
(5)knife edged the TB bore lip
(6)reworked all surfaces with 100, 400, and 2000 grit sandpaper
(7)cleaned all surfaces
(8)blended the screws into the plate and modified half shaft 100% flush
Although I was extremely skeptical, these are the results:
(1)Drastic increase in sensitivity on throttle tip-in
(2)Substantial increase in overall throttle response
(3)Very marginal (if any) increase at WOT
(4)Estimated marginal power gains at mid level RPM, but doubtful peak power increase (i.e. maybe some more power below the curve but likely not at peak)
It took about 6 hours to do a proper job. I was shocked at the results. The car feels very alive. I would recommend this mod.
Now back to the instructions. The SVT TB shaft needs to be cut and this important step is not detailed in the instructions. The SVT uses 10mm not 8mm bolts. A countersink bit should be used, not a drill bit.
