Ive put together a fresh 350 for a friends cruiser that also runs a powerglide.
Car was running fine previously with a 307 and the same glide.
350 uses new 461 look heads and a mild Summit 1069 Hyd flat tappet cam 214/214/110
Reusing Summit HEI and 1850 Holley
Engine fired straight away and I ran it in for half an hour. Later we gave it a basic tune and engine sounded nice. 16 inches vacume.
Then we started having problems with the engine cutting out very abruptly as if power to the HEI was cut. The car would also stall and cut out when I put it in drive as if there was zero stall in the convertor.
After a while I decided the occasional engine cut out only happened at low revs, say 1000rpm or below.
We changed the carb to a new 650 Edelbrock and got the same results.
Alternator charging at 13+volts
We put a 12v+ wire direct from the battery to the HEI and the engine still instantly died when we pulled it into gear.
We changed the cap/coil with a new Summit HEI cap/coil
I now wonder if the problem is the body of the HEI, whereby the Ign fails if it drops below 1000rpm, which is what happens if I drop the idle down or pull the car into gear. The engine cut out is instantaneous, not a slow process you would expect if the carb was lean or timing out, too low stall etc.
Also struggling with a pair of new starters, factory new style where after a while of restarts it spins the starter motor but doesnt throw out the gear to engage the flexplate. I notice the rod out the back of the solenoid is plastic as is the arm/lever to throw out the gear. We pull them apart, find nothing then later put them back in the car and they work fine for a while.
Car was running fine previously with a 307 and the same glide.
350 uses new 461 look heads and a mild Summit 1069 Hyd flat tappet cam 214/214/110
Reusing Summit HEI and 1850 Holley
Engine fired straight away and I ran it in for half an hour. Later we gave it a basic tune and engine sounded nice. 16 inches vacume.
Then we started having problems with the engine cutting out very abruptly as if power to the HEI was cut. The car would also stall and cut out when I put it in drive as if there was zero stall in the convertor.
After a while I decided the occasional engine cut out only happened at low revs, say 1000rpm or below.
We changed the carb to a new 650 Edelbrock and got the same results.
Alternator charging at 13+volts
We put a 12v+ wire direct from the battery to the HEI and the engine still instantly died when we pulled it into gear.
We changed the cap/coil with a new Summit HEI cap/coil
I now wonder if the problem is the body of the HEI, whereby the Ign fails if it drops below 1000rpm, which is what happens if I drop the idle down or pull the car into gear. The engine cut out is instantaneous, not a slow process you would expect if the carb was lean or timing out, too low stall etc.
Also struggling with a pair of new starters, factory new style where after a while of restarts it spins the starter motor but doesnt throw out the gear to engage the flexplate. I notice the rod out the back of the solenoid is plastic as is the arm/lever to throw out the gear. We pull them apart, find nothing then later put them back in the car and they work fine for a while.
