Compression Ignition Addict
Join Date: Dec 2008
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Here is the rundown.....traction is definitely an issue at the track with this tune. Rail pressure is not an issue however. The best thing to do with this tune at the track is to not stage until the second bubble. If you stage early, the throttle is soooooo touchy that your foot will bounce on the pedal with any movement....including inching up from the first bubble to the second at any RPM higher than idle.
Track time comparison is in favor of the 310 tune by about 8/100 of a second. The 350 tune, however, made 38 more horsepower on the dyno during tune testing. Same dyno, same day, same EVERYTHING.
My truck made 572/1157 at 38 psi of boost and 99 degree, high humidity heat. This was at TS Outlaw in Bowling Green, KY on July 24, 2010. Dyno was David Dunbar's mobile dyno.
As far as upgrades.....a torque converter would definitely be ideal with this tune. Mine lasted a week with the tune and some pretty intense testing. I went from 65-75 RPM of slip with the 310 to well over 200 RPM of slip with the 350 tune. I was seeing well over 100 RPM of slip at 3/4 throttle with the converter locked.
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2012 Ford F-250 Lariat CC/SB
Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights