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Old 01-17-2018, 09:51 PM   #15
bayarea408

 
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What injectors did you use?

A ZL1 should post up closer to 500 wheel. I have seen STOCK ZL1's go 480-515 on various dyno's. Dynojet and dyna pack

I suspect dyno calibration off on the mustang dyno if hes saying he clocks stock ZL1's at 440.

Dyno is just a calibration tool. Maybe try to spin her somewhere else see what numbers you get. How does the tune feel? does the car break up? how does it idle?
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Old 01-18-2018, 10:28 AM   #16
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Quote:
Originally Posted by bayarea408 View Post
What injectors did you use?

A ZL1 should post up closer to 500 wheel. I have seen STOCK ZL1's go 480-515 on various dyno's. Dynojet and dyna pack

I suspect dyno calibration off on the mustang dyno if hes saying he clocks stock ZL1's at 440.

Dyno is just a calibration tool. Maybe try to spin her somewhere else see what numbers you get. How does the tune feel? does the car break up? how does it idle?
I used the ones that came with the ADM kit, which should be the ZL1 injectors. The car seems to run good, except once when it cold and I really didn't give it anytime to warm up and then it stumbled a little bit. Idles good although maybe a little on the slow side.

I probably will eventually make a run somewhere else just to see. I'm starting to think maybe it is just a combination of little things that make the reading low. Not running it out as far as he might could, Mustang dyno, L99/auto could add up.

If the actual peak was more like 460 at 6400 (which seems possible based on other's dyno runs I found) and the dyno reading is off by 10% from a dynojet (again seems to be an amount often thrown out) that puts me at 506 rwhp. If my drivetrain losses are on the high side of 18% (and I had brand new fluid in transmission and differential) that's 597 at the engine which is a 50% increase that I was expecting.
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Old 01-19-2018, 12:01 AM   #17
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Old 01-19-2018, 08:39 AM   #18
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Try a different dyno or go run at the track. Where I live I have done back to back dyno on my l99 before cam , on a dynocom dyno it did 428/433 on a mustang dyno it did 416/428. I watched a 13 stock zl1 with tune cai do 460/450 on the dynocom
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