Dave's car is EFI and hits the same dyno every year. That dyno is very consistent too. Most cars here pump out the same numbers year after year. Ken's car was one of those until this year when it decided to make an extra 20 some hp.
Dave's car is EFI and hits the same dyno every year. That dyno is very consistent too. Most cars here pump out the same numbers year after year. Ken's car was one of those until this year when it decided to make an extra 20 some hp.
You already have a 7hp allowance...target power is 260
Al Fernandez
Wrong. That maybe your target but not the target for certain cars/tracks. That was proven out in Cali on the high speed tracks that it's better to run the higher hp numbers-now it's even more skewed with the weight breaks. Change up the weight breakdown so it's not an advantage to run over 260 and maybe then you would have 260 as a target. The Fox can run 7 more hp than an LS car and still weigh 100 pounds less. I think we have seen what 7 more hp can do on some straights.
This makes me curious about the carb guys. Do you guys have to have multiple dyno runs with different jets? Or do you run the same jets all season?
Bryan Leinart
CMC #24
The rules state that a carb car can change jets to facilitate tuning. I take this to mean that I can change jets when necessary to maintain a consistent air to fuel ratio. Before a dyno? I don't have that answer.
7.21.1 The jets, metering rods, needles, etc in the stock / spec carburetor may be changed to facilitate
tuning.
I typically only change jets for altitude changes. With a single jet size I see 12 -13 A/F from Dallas to NOLA. But Hallett and Colorado are very different jet sizes to maintain that A/F ratio.
Anyone is welcome to have multiple dyno's for various setups. Ex, you can have a 260 hp dyno for certain tracks and a 265 hp dyno for different tracks.
Any change to carb jets will require a new dyno. The dyno form has a spot for jet sizes so if tech is performed, the jets in the carb must match the jet size on the submitted dyno.
I have had many recommendations for more tech items confirming ignition timing, fuel pressure, etc. This would be something that falls into a similar category.
-Michael Mosty
CMC #11 Mosty Brothers' Racing
Director - TX Region
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