elementaltoad
Active Member
I have been working on a 1974 Scamp that I got in a trade, the car has a ATK DD03 replacement longblock, Edelbrock 4bbl 1406 and a rebuilt 904 transmission.
So far I have:
Rebuilt the 1406 with stock jets and rods, set t-port sync, installed orange springs (5" HG)
Installed a new distributor, set air gap, timing set at 14* initial
Set idle in neutral to 950rpm, idles at approximately 650RPM in gear
Set kickdown to full back at WOT
Mixture screws are set for best vacuum (16") and best idle quality, no popping, puffing or sputtering
The problem I am having is that while driving the car it doesn't seem to want to take any throttle. Light throttle low speed acceleration is fine, but as soon as I put my foot into it at all to get up a hill or accelerate quickly it just seems to bog. It doesn't buck, ping or backfire. If I stay in it, it will slowly come alive and start to pick up RPM and speed quickly.
I have noticed too that on hot restarts I get what sounds like a spark knock. I am going to pull timing out of it and set it at something like 6* BTDC, resync the t-ports and try to get a decent idle out of it. I started with silver springs, and moved down until the car stopped sputtering under heavy throttle. But maybe I went to far?
Does anyone have a similar set up that might have ideas on why this thing feels like such a slouch under heavy throttle?
So far I have:
Rebuilt the 1406 with stock jets and rods, set t-port sync, installed orange springs (5" HG)
Installed a new distributor, set air gap, timing set at 14* initial
Set idle in neutral to 950rpm, idles at approximately 650RPM in gear
Set kickdown to full back at WOT
Mixture screws are set for best vacuum (16") and best idle quality, no popping, puffing or sputtering
The problem I am having is that while driving the car it doesn't seem to want to take any throttle. Light throttle low speed acceleration is fine, but as soon as I put my foot into it at all to get up a hill or accelerate quickly it just seems to bog. It doesn't buck, ping or backfire. If I stay in it, it will slowly come alive and start to pick up RPM and speed quickly.
I have noticed too that on hot restarts I get what sounds like a spark knock. I am going to pull timing out of it and set it at something like 6* BTDC, resync the t-ports and try to get a decent idle out of it. I started with silver springs, and moved down until the car stopped sputtering under heavy throttle. But maybe I went to far?
Does anyone have a similar set up that might have ideas on why this thing feels like such a slouch under heavy throttle?
