Dyno Day

[Hammer]

Just got back from the Dyno, Couldn't get torque numbers, something with the spark plug wire.
Run #1 HP 332.56 SAE corrected
Run #1 HP 297.73 Uncorrected
Run #1 Crankshaft HP 415

Run #2 HP 327.98 SAE corrected

Run #3 Top Speed Run 192.6 in 5th gear

[flyin ryan]

seems about right for what you have done John. did you make any changes looking for more power or was it a strap her down & what it is, is what it is kinda deal? speeds good.

[Hammer]

seems about right for what you have done John. did you make any changes looking for more power or was it a strap her down & what it is, is what it is kinda deal? speeds good.

No tuning, just strap it and go. My bud also ran his Callaway 500 today, 356 HP 467 TQ, Damn it was bad azz. highest torque numbers from anything they ran including a '97 Viper.

I went to the track tonight too and ran a 13.04 @ 109 with a big head wind. I'm happy with the mods I've done. No more til the plenum has to come off.

[jonszr1]

wwhat modds ya got

[Hammer]

wwhat modds ya got

Haibeck chip, Flowmaster #17115 and Coplon Duct.

[XfireZ51]

How could you not get torque #s if HP is derivative? :confused:

[Hammer]

How could you not get torque #s if HP is derivative? :confused:

For some reason the ZR-1 engine creates an electrical problem at the spark plug connection with the dyno cord. There is a special cord for ZR-1's that takes care of this, but they are $450 and the owner can't justify that expense when he doesn't run the ZR-1's. Mine was the first. Demps verified this and said sometimes you can put a loop in the dyno cord to care of that. He has had this problem on his blue car before. Unfortunately I talked with him after the runs.

[XfireZ51]

For some reason the ZR-1 engine creates an electrical problem at the spark plug connection with the dyno cord. There is a special cord for ZR-1's that takes care of this, but they are $450 and the owner can't justify that expense when he doesn't run the ZR-1's. Mine was the first. Demps verified this and said sometimes you can put a loop in the dyno cord to care of that. He has had this problem on his blue car before. Unfortunately I talked with him after the runs.

http://www.ajdesigner.com/phphorsepower/l_horsepower_equation_rotating_torque.png (http://www.ajdesigner.com/phphorsepower/horsepower_equation_rotating_torque.php)

The dyno doesn't measure Horsepower. It measures torque and converts to HP. You should be able to derive your torque from above.

[We Gone]

Nice..:thumbsup:

[Hammer]

http://www.ajdesigner.com/phphorsepower/l_horsepower_equation_rotating_torque.png (http://www.ajdesigner.com/phphorsepower/horsepower_equation_rotating_torque.php)

The dyno doesn't measure Horsepower. It measures torque and converts to HP. You should be able to derive your torque from above.

Looks like the dyno was set to speed of some sort instead of RPM. At HP peak the graph shows 120 at the bottom. I'm gonna call the guy tomorrow and see if he can pull that run with RPM.

[Jeffvette]

For some reason the ZR-1 engine creates an electrical problem at the spark plug connection with the dyno cord. There is a special cord for ZR-1's that takes care of this, but they are $450 and the owner can't justify that expense when he doesn't run the ZR-1's. Mine was the first. Demps verified this and said sometimes you can put a loop in the dyno cord to care of that. He has had this problem on his blue car before. Unfortunately I talked with him after the runs.

John a smart dyno operator knows how to remedy this situation. :mrgreen:

[Aurora40]

The ZR-1 has waste-spark, which means the plug wire sparks more often than once each two rotations. But there's a pin out on that harness by the ECM, the troubleshooting one, that has RPM. They can probably get the feed from that thing.

That's what they do when I go to the dyno.

[Hammer]

The ZR-1 has waste-spark, which means the plug wire sparks more often than once each two rotations. But there's a pin out on that harness by the ECM, the troubleshooting one, that has RPM. They can probably get the feed from that thing.

That's what they do when I go to the dyno.

Any chances you could post a picture of the pin you use.
Thanks

[Aurora40]

Any chances you could post a picture of the pin you use.
Thanks
Erm... Yeah, let me look it up. I don't know offhand which pin is the rpm one.