3rd gear is pretty standard for DSM dyno tuning. If anything, his numbers are LOWER thanks to the 3rd gear pull. The taller the gear, the higher a dynojet will read.
"Higher ratio gears will give you lower chassis dyno numbers for a strange, but logical reason. In essence, the DynoJet calculates hp based on the time it takes to spin up the 2800lb roller assembly. It's basically work divided by time and rpm. Think about this: If you car is at idle in neutral and you stab the throttle, it will take time to accelerate to redline...let's say 1.1 seconds. Now let's say it takes 8.2 seconds for your car to accelerate the DynoJet from low speed to top speed with 3.23 gears and 7.3 seconds with 3.73 gears. Dyno printout says 355 rwhp with 3.23 gears and 346 rwhp with 3.73 gears...why?
Think aabout this: In the 8.2 seconds it takes to spin the rollers with 3.23 gears, it would still take the motor about 1.1 seconds to overcome its own inertia (idle to redline). There's about 13.4% of the work used just to accelerate the motor itself. With 3.73 gears, the time to reach redline decreases to 7.3 seconds. Divide the 1.1 seconds into the 7.3 seconds and you will see that overcoming the internal engine inertia costs 15.1% of the work with 3.73 gears. There is less hp available during this time period to spin the rollers so the DynoJet will read a slightly lower hp figure. Make sense, or did I lose you?"
Originally Posted by e85_4g63
Does Mike R currently hold that record? (9.9X if I recall) Mike is only a stock short block though with a Buschur stage 3 head. I might be off, but that's what I remember from searching it and watching his YouTube video's.
Yes, he does. That block cracked where the bell-housing bolts up (what a silly way for that legendary block to die) and he sold the turbo, not sure what he might be planning.