Ford vs Chevy Build-up

[HandOverFist]

Originally Posted by SSGT Mustang

What do you have for a first gear in that trans?

Its a Dynamic C4 with a 2.90 gearset. Convertor is a Dynamic Race 8 with mech diode.

[Alan Nyhus]

Rich, driveshafts can bind if the u-joints 'break' out of phase..... -Al

[HandOverFist]

Originally Posted by Alan Nyhus

Rich, driveshafts can bind if the u-joints 'break' out of phase..... -Al

But that bind would exist regardless of rotation direction, right?

[Alan Nyhus]

Originally Posted by HandOverFist

But that bind would exist regardless of rotation direction, right?

I would think so, Rich. May be worth it to change the pinion angle at the front (both ways) and see if the binding gets better/worse.

[HandOverFist]

When I had the drive shaft loose from the pinion and holding it aligned with the front the resistance was felt rotating only in one direction and was constant...about half as much the other direction. Not near as free as the Camaro/metric trans for sure. I'll admit I may be ghost hunting here hehe.

[SSGT Mustang]

Call Dynamic. Band adjustment, maybe?

[fordteacherguy]

C-4 output shaft turning effort higher in one direction than the other is normal.. there is less turning effort when the rear one way roller is overrunning..... higher effort when the rollers are holding and the gear sets are turning.

[GallopinGhost]

The AODE that I re-built acted the same way. good job so far Rich.

[fordteacherguy]

Rich,

Lean that tune up to around 13-13.2 and watch it pick up a ton!

[HandOverFist]

Originally Posted by fordteacherguy

Rich,

Lean that tune up to around 13-13.2 and watch it pick up a ton!

Brian - The second pass (handed off to Kenny) he reported 14.0ish before he crossed the stripe. I did not have the camera in the car that pass and took him at his word...was afraid to lean it any further at that juncture. I'm pretty sure it's still a sour air/fuel ratio problem which I will have to get a handle on.

After Alan brought up the drive shaft phasing I began to doubt myself and took a look at it again today...all looks good as far as I can tell. I'll re-check pinion angles again. Car is on a lift with the rear fully extended in the pics, thus the extreme angle at the pinion.





Junk shots under the car...









Had some popping going on at cold start initially...figured it was lean at idle and WB confirmed. Gave it a little more fuel at that point and calmed it down. I'm wondering if I should just remove the piggyback for now and let the wideband O2 sensor tell me what to do via fuel pressure adjustment.