Dyno Results for Midwest Turbo Connection (MTC) 7659 Billet TD05's (Stage 4's)

[JRink]

Few updates today...

Swapped in some 3" pre-turbo piping (tapered down to 2.5", the size of the compressor inlet) on Friday, and added a small sized meth nozzle pre-intercooler for extra safety. Results are mixed I guess. Found that with the larger intake piping, the turbos don't seem to have to work as hard to make 'x' boost. Whereas last week, 85% duty cycle was 35psi on my Blitz DSBC, it only took 75% duty cycle this time to make 35psi. The first dyno pull was still using 85% duty cycle, which resulted in a 38psi pull by mistake - An 'oops' on our part since the MAP sensor only reads 35psi, higher boost yields a leaner tune. I think it got as lean as mid 12's AFR on that pull. Car made substantially more power at that boost though, 895awhp. We re-adjusted the duty cycle on the DSBC from 75% to 65% to get us back to 35psi and made 852awhp. Decided to leave it at that for now... Timing advance is still in the teens and knock volts are very quiet at the moment.

Post-turbo intake piping is getting upped from 2" to 2.5" next, probably won't get done with that until next Monday or Tuesday. Shop has other cars they need to work on and this requires some cutting to my fender wall and frame near the headlight bucket to fit those larger pipes. Not really sure what (potential) gains to expect from increasing the pipe size and reducing suspected turbulence, pressure loss, etc.

Last Friday we noticed some exhaust soot on the front valve cover so I might have them pull the front header and fix whatever is cracked when they fab the intercooler pipes.

JR