[54nomore]

Here's the results of my experimenting at the track just yesterday. The first timeslip is me shifting manually at 5000. The second is with the trans. in DRIVE shifting it's self at 43-4400. My car is on the right on both slips. The pics aren't super clear, but they read 15.301 and 15.328

[Formulajones]

Originally Posted by 54nomore

Here's the results of my experimenting at the track just yesterday. The first timeslip is me shifting manually at 5000. The second is with the trans. in DRIVE shifting it's self at 43-4400. My car is on the right on both slips. The pics aren't super clear, but they read 15.301 and 15.328

Better 60 foot by a tenth on the second pass should have equated to close to 2 tenths quicker ET, but you slowed down. That tells me that short shifting the car on your second pass hurt your ET, likely by more than your slips are showing.

[AdamIsAdam]

Originally Posted by Formulajones

Better 60 foot by a tenth on the second pass should have equated to close to 2 tenths quicker ET, but you slowed down. That tells me that short shifting the car on your second pass hurt your ET, likely by more than your slips are showing.

Good catch.

[johnta1]

I took it as the 5000 RPM launch had the tires spinning some thus the slow 60' (and 1/8th).
The higher RPM helped though on the top end.
(ET and MPH)

The lower launch hooked and pulled through the 1/8th but was out of the RPM range of the engine on last half of run.



Try some slicks and see what the results would be.

[STEELCITYFIREBIRD]

Originally Posted by johnta1

Try some slicks and see what the results would be.

Agree..keep tool box, checkbook and tow vehicle ready.