A-Body Round #2- My '76 Scamp restore...
@TT5.9mag - Tagging you here since you'd asked for an update but didn't want to muddy up the other draw-through turbo thread with my progress...
Had an appt with a tuner today. Spent the first good while working on fueling while driving on the street. It was apparently running pretty lean and there was a decent stumble in the higher rev range. Below is the fueling chart he ended up finishing with. Purplish stuff in the bottom right side is decel. Green is all looking pretty good. The orange/pink area is something he manually adjusted to overcome the high rev stumble we were experiencing.
Unfortunately, it doesn't seem that my timing control is working at all as any changes he made on the laptop were not actually changing on the engine/running. We waited on the phone about an hour to get to Holley Tech support and they ended up saying that timing control just won't work with the Sniper on my application. Tried sending me over to the MSD side to talk to them but after waiting on hold a while we gave up on it.
At this point, I need to figure out why the timing control isn't working and get that rectified and then probably go back to the tuner again so that we can do that portion. At this point, we didn't bother loading it on the dyno as all we'd really do is convert money into heat and noise just to get a low number.
We did try advancing the timing a little bit by rotating the distributor, but then my idle got much worse, so moved it back.
My current set-up that I did based on reading forums and youtube videos includes the following:
The thing the Holley guys were hung up on is that I guess I need an adjustable rotor, which mine doesn't seem to have since it's just a modified version of the original Mopar electronic distributor.
At this point it is running and driving well, but timing is just barely BTDC. The tuner feels like there is still a lot of power left on the table that he can get out once we figure out how to get the timing to actually adjust like it should.
Time for more research and probably vast sums of cash to get that part working... LOL
@TT5.9mag - Tagging you here since you'd asked for an update but didn't want to muddy up the other draw-through turbo thread with my progress...
Had an appt with a tuner today. Spent the first good while working on fueling while driving on the street. It was apparently running pretty lean and there was a decent stumble in the higher rev range. Below is the fueling chart he ended up finishing with. Purplish stuff in the bottom right side is decel. Green is all looking pretty good. The orange/pink area is something he manually adjusted to overcome the high rev stumble we were experiencing.
Unfortunately, it doesn't seem that my timing control is working at all as any changes he made on the laptop were not actually changing on the engine/running. We waited on the phone about an hour to get to Holley Tech support and they ended up saying that timing control just won't work with the Sniper on my application. Tried sending me over to the MSD side to talk to them but after waiting on hold a while we gave up on it.
At this point, I need to figure out why the timing control isn't working and get that rectified and then probably go back to the tuner again so that we can do that portion. At this point, we didn't bother loading it on the dyno as all we'd really do is convert money into heat and noise just to get a low number.
We did try advancing the timing a little bit by rotating the distributor, but then my idle got much worse, so moved it back.
My current set-up that I did based on reading forums and youtube videos includes the following:
- I used the stock magnetic distributor that came with the car. I had pulled out the vacuum advance parts, moved the weights out and JB-welded them in position, and drilled a hole to lock the 2 plates in the distributor together.
- The original mopar ignition box was removed.
- I used the Holley Coil Driver Module they offer.
The thing the Holley guys were hung up on is that I guess I need an adjustable rotor, which mine doesn't seem to have since it's just a modified version of the original Mopar electronic distributor.
At this point it is running and driving well, but timing is just barely BTDC. The tuner feels like there is still a lot of power left on the table that he can get out once we figure out how to get the timing to actually adjust like it should.
Time for more research and probably vast sums of cash to get that part working... LOL