All I can say is WOW!
Based on skiracer’s results
in this thread, I took a road trip out to Road Race Engineering and had Scot Gray lay the 91 and E85 map-switching tunes on my VIII. I could not be more pleased.
My hat is off to
skiracer for showing up for the late night dyno session!!! Thanks for the moral support!
My full mod list is:
BR cone filter
BR SS MAF pipe
Hallman MBC
APS dual vent BOV/DV
Helix down pipe
Helix test pipe
Greddy EVO2 cat-back (modified to 3")
HKS 264/264 cams
Nisei LICP
Walbro 255Lph fuel pump
IX turbo
PPI ported ex manifold
SS O2 housing
ETS 3” FMIC
RC 1,000cc injectors
Scot managed to squeeze out 319whp/286trq on 91 at 21psi.
I was a bit disappointed to say the least. I had previously made 318whp/311trq on the local heart-breaker Mustang. I was hoping to do better, not worse. First I loose my mind, and then I loose my torque. I was kinda bummed.
However, the E85 elixir did not disappoint. Scot dialed in a blistering 394whp/418trq at 28psi. That's an E85 gain of
76whp and
132trq or 24% more whp and 46% more torque, on a boost increase of 7psi.
The only down side was that I had to switch to the 91 tune for the drive back to Tucson.
The power level of the IX turbo on E85 is as close to perfection as I can imagine. It makes fifth gear feel like 3rd and 3rd gear feel like 1st. This is far and away the best mod I've done yet!
