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We flew UMS Tuning's Tony Szirka in from Phoenix, AZ to tune our car at Fathead Fabrication's dyno. Needless to say this was a bit of a stressful day as it was the first time firing the car up! After a few hours of working out little gremlins here and there, we got it squared away and tuned to 30psi.
Here is the dyno for the previous 2.4L engine with MA Performance EF4 turbo. This was done in Phoenix at UMS on the way out to the 2012 Global Time Attack Super Lap Battle at Buttonwillow. This was at a peak of 32psi on a Dynapak dyno.
And here are the results from the Dynoyet at Fathouse Fab. This tune was a peak of 30 psi and intentionally conservative as everything was obviously brand new. We couldn't risk having any set backs before bringing the car from Indiana to California.So what does this all add up to? We don’t have back-to-back plots on the same style of dyno, but measured G’s under acceleration seems to backup the numbers when comparing our initial Dynapak 2.4L run to the second Dynojet 2.2L plot. We ended up with approx. 75 more peak whp with 2 psi less peak boost. From approx. 6500 RPM and on we have about 50 ft lb. more torque than the previous engine. We lost about 500 rpm of initial spool, but gained 1000 rpm of usable power band. We were conservative on wastegate settings for the initial tune, so once we hit the dyno again, there is a chance we can gain back what we lost. That’s all for now, stay tuned as we get into more details of what controls the engine and keeps every thing from blowing up next time!
