Finnegan's Garage

IT'S UNHAPPY SO WE STOPPED SICK WEEK TO DYNO TEST BLASPHEMI!! (2025x6)

Air date: Feb 09, 2025

In the middle of Sick week 2025, a road-tripping drag racing event, I decided that Blasphemi really needed to be tuned on a chassis dyno. So, in the middle of the event, we stopped by Kevin Smith's KSR Performance in Gainesville, Florida, to strap the car to his Dynojet and measure the power output of the 528ci Hemi. We did this because the day before, we noticed our Holley Dominator EFI system adding nearly 300 lb/hr of additional fuel to the base fuel map even though we weren't asking it to do so. Luckily, Pete Harrell, owner of Harrel Engine and Dyno, the shop that built the Hemi was onhand to dissect the data we were looking at and to make the calls on how to adjust the tune. What we discovered on the dyno was that Cylinder number 5 was running lean, even though the average of all the cylinders were not. By adding fuel to just that cylinder, were able to lower its Exhaust Gas Temperature and subsequently the EFI system stopped adding so much extra fuel to every cylinder of the engi