Hello gang,
This is kind of a spinoff from my other thread. "sputtering issue with new carb".
Holley 870 vac,: I jetted down to 78 primary/82 secondary from 82/82. Sputtering was better, but still did some.
Can I jet down further? How do I know if it's too lean?
Holley 670 vac: I jetted up to 70/71 from 63/64. Ran great. No sputtering. Engine ran a little warmer. I don't think outside temp was much warmer. I'm worried it was running lean. Again, how do I knw it's lean?
I'm not experienced enough to tell if it lean. The plugs were spotless. I'm paranoid about running it too lean and cooking my new motor. Can I jet it further?
Edel 750 factory jets. It ran good. It seemed to load up a little at start, but fine after that. Performance seemed less than both the Holleys. The plugs were spotless and does not appear to be rich.
Buy a new Holley 750? Or Edel?
I'm friggin tired and in the dog house buying carbs. I am ready to buy one more and sell the others if need be.
Help!!!
Specs:
Vacuum at idle is 10 to 13. Not sure what it is at higher rpms.
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. High polished cylinders.
New Carter mechanical fuel pump 120 gph. 3/8" to carb. 6 psi.
5/16th line from tank to pump. 3/8 from pump to carb.
160 degree t-stat.
Headers
3" stainless magnaflow.
4 speed / 3.23 SG.
Hopefully this gives enough info.
thanks!
This is kind of a spinoff from my other thread. "sputtering issue with new carb".
Holley 870 vac,: I jetted down to 78 primary/82 secondary from 82/82. Sputtering was better, but still did some.
Can I jet down further? How do I know if it's too lean?
Holley 670 vac: I jetted up to 70/71 from 63/64. Ran great. No sputtering. Engine ran a little warmer. I don't think outside temp was much warmer. I'm worried it was running lean. Again, how do I knw it's lean?
I'm not experienced enough to tell if it lean. The plugs were spotless. I'm paranoid about running it too lean and cooking my new motor. Can I jet it further?
Edel 750 factory jets. It ran good. It seemed to load up a little at start, but fine after that. Performance seemed less than both the Holleys. The plugs were spotless and does not appear to be rich.
Buy a new Holley 750? Or Edel?
I'm friggin tired and in the dog house buying carbs. I am ready to buy one more and sell the others if need be.
Help!!!
Specs:
Vacuum at idle is 10 to 13. Not sure what it is at higher rpms.
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. High polished cylinders.
New Carter mechanical fuel pump 120 gph. 3/8" to carb. 6 psi.
5/16th line from tank to pump. 3/8 from pump to carb.
160 degree t-stat.
Headers
3" stainless magnaflow.
4 speed / 3.23 SG.
Hopefully this gives enough info.
thanks!
