I will try and answer some of the questions I have seen. Yes we do Chevy engines as well at the shop. My partner in the Texas store is building a new tube chassi drag car from Rick Jones Race Cras and we did him a 565 Big Block Chevy that was really nice with the Brodix aluminum block and big Duke heads and a single 4 dominator. This engine produced 800FT/Lbs torque and 1050HP. We were very happy with it.
We run about 140 to 150 seat and 350 to 400 lbs open on the hydraulic rollers with no problems. As said before the problem with the solid roller is to keep some
oil to the roller bearing on the lifter.
I believe the fuel turbines or the air flow meter may be of a little on the dyno giving the higher than normal air fuel ratio. I was checking the exhaust temps as well and they were in the 1200 to 1250 range and this is in the area were they should be. I will also check these items again on the other dyno. We richened the carburetor up 4 jets on the front and I believe 6 on the back from where we started. I would not run this on a road race engine with 15 to1 either and would prefer 13 to1 in this case. I will also check and see if the correct fuel specific gravity was entered. Some times the dyno operator may forget to change this from the last dyno session. The regular fuel weighs more than the race fuel and this would richen the numbers as well. Hope this helps a little bit. Thanks Keith