Hello gang,
When diving the carb will sputter. I can cruise at any speed (40 to 80 mph) consistantly and out of the blue,,, it sputters for a split second and then is fine. It will do this at various times, but approximately every 45 seconds to a minute.
Here are the facts. Heads up ,, I'm a novice here. IF I need to give more info just fire away.
We do have it running rich with 82 size jets (we went higher but had to come back down) and performance power valve. Motor build is excellent. Runs and idles great. It does good banging through the gears. Build came over to adjust the carb and timing.
Got 115 miles on new engine. The previous fresh rebuild with this same carb did the same thing. I had a cracked block in previous engine. :(
New 870 Holley(4150) vac secondary. square bore.
Intake is Edlebrock performer dual plane (spreadbore) has 1" adapter plate to square bore.
Mallory electonic distributor.
360 block with 318 heads. computer specs with this build shows 450 peak HP (5000 RPM), 540 peak torgue(4000).
Lunadi hyd cam 30405 , Duration (.50) 224/234 , lift .318/.338
Bored .30 KB 107 pistons.
New Carter mechanical fuel pump 120 gph. 3/8" to carb. 6 psi.
5/16th line from tank to pump.
160 degree T-stat. Engine runs exactly 160 degress.
Headers
3" stainless magnaflow.
4 speed / 3.23 SG.

Hopefully this gives enough info.
thanks!

Hello gang,
When diving the carb will sputter. I can cruise at any speed (40 to 80 mph) consistantly and out of the blue,,, it sputters for a split second and then is fine. It will do this at various times, but approximately every 45 seconds to a minute.
Here are the facts. Heads up ,, I'm a novice here. IF I need to give more info just fire away.
We do have it running rich with 82 size jets (we went higher but had to come back down) and performance power valve. Motor build is excellent. Runs and idles great. It does good banging through the gears. Build came over to adjust the carb and timing.
Got 115 miles on new engine. The previous fresh rebuild with this same carb did the same thing. I had a cracked block in previous engine. :(
New 870 Holley(4150) vac secondary. square bore.
Intake is Edlebrock performer dual plane (spreadbore) has 1" adapter plate to square bore.
Mallory electonic distributor.
360 block with 318 heads. computer specs with this build shows 450 peak HP (5000 RPM), 540 peak torgue(4000).
Lunadi hyd cam 30405 , Duration (.50) 224/234 , lift .318/.338
Bored .30 KB 107 pistons.
New Carter mechanical fuel pump 120 gph. 3/8" to carb. 6 psi.
5/16th line from tank to pump.
160 degree T-stat. Engine runs exactly 160 degress.
Headers
3" stainless magnaflow.
4 speed / 3.23 SG.

Hopefully this gives enough info.
thanks!