Concur with Johnny.
Todd, my dyno graph on the Triangle Speed Shop Mustang Dyno shows 243 RWHP compared to your 298. However, my car's baseline pull made around 265 at the time we aborted the run (it was pinging really bad, which is why I brought it in for the tune). Its operation got smoother and you could hear a more even application of power on the dyno with each run, eventhough the HP dropped off by about 7 RWHP each time. After 4 back to back pulls, heat soak cut my power production by almost 25 RWHP. The weather that day at TSS was pretty close to SAE conditions anyhow. Johnny was there during the tune, and he also attributed the 243 RWHP to heat soak and running on a Mustang Dyno, since his car's power fell by a similar margin with each pull too.
So, adding 10% more RWHP to convert back to a Dynojet, I would have around 267 RWHP, even after 4 consecutive pulls. Then, add in what I lost from heat soak, and you're looking at a mid 290ish RWHP for a money shot run, which is what I was hoping to see that day. I bring all this up because the ET / MPH / Race Weight from my best run indicates around, 270-275 RWHP. The operating temps were similar, since I made 3 runs in 10 minutes at the track with the fastest one (best launch) being on the third attempt. I also had a pressure altitude of 1100'. That 270-275 RWHP estimate from the track is damn close to the 267 RWHP estimate from a Dynojet, so I would say my data is valid, putting me within about 30 RWHP short of Todd's big bore.
-5.0 Big Bore
Ran @ Normal Operating Temps, No Race Tune, No Setup Changes from Daily Driven Configurations
9.0 @ 78 (1/8 Mile only in Abilene
2.06 60' on Street Tires (BFG G-Force Super Sport 245/50/16)
3805 Lbs, Stock Exhaust Manifolds
Density Altitude = 4132'
That Run, Corrected for Standard Day
1/8 mile: 8.75 @ 82
Last edited by BIG PETE; 02-27-2007 at 10:32 AM.