Hello All,
I was wondering if anyone had any recommendations for spark plugs and timing on a rebuilt 440. I figured I would go with a copper plug(but willing to listen), but the heat range is what I have in question. Should I start with the stock heat range (I believe it is 12 in the Champion world) or should I go a notch colder? As for the timing, should I put it at 10 degrees advanced at idle? I'll list what the engine has and let the conversation start. You'll notice I spent probably way too much money and maybe would have been better off going with a crate motor.....but I didn't so here I am.
1967 440 engine block bored 0.030" over
Stealth aluminum heads from 440 source
Comp Cams Ultra Pro Magnum Rocker Arms
Camshaft - Comp Cams hydraulic roller Xtreme Energy XR274HR-10 (PN 23-710-9)
-Valve springs and roller hydraulic lifters to match the cam (Comp Cams)
-Installed cam at 0 degrees, no cam advance, set it up just like the card said and it checked good
Pistons - forged aluminum flat tops (can't remember manufacturer and I don't have my engine book with me)
compression ratio calculated at 10.5:1
Carbs - six pack set up by ProMax carbs
-I had them do the work of rebuilding the carbs and they set them up on their 440 so I should have a decent baseline to work with
Edelbrock aluminum six pack intake
Transmission - A833 4 speed
rear end gears - 3.55 sure grip
Headers - old rusty set of Summit headers for break in, I think they are 1-3/4" primaries
-I have a set of Hooker ceramic coated headers ready to install once I break the engine in, (1-7/8" primaries)
Exhaust - 3" flowmaster "American Thunder" system
I also have a list of the carb settings installed by ProMax, but I don't have them with me right now. If you think that would help, let me know, and I can look those up later. If there is anything else you think would be helpful please let me know. Thanks for reading.
I was wondering if anyone had any recommendations for spark plugs and timing on a rebuilt 440. I figured I would go with a copper plug(but willing to listen), but the heat range is what I have in question. Should I start with the stock heat range (I believe it is 12 in the Champion world) or should I go a notch colder? As for the timing, should I put it at 10 degrees advanced at idle? I'll list what the engine has and let the conversation start. You'll notice I spent probably way too much money and maybe would have been better off going with a crate motor.....but I didn't so here I am.
1967 440 engine block bored 0.030" over
Stealth aluminum heads from 440 source
Comp Cams Ultra Pro Magnum Rocker Arms
Camshaft - Comp Cams hydraulic roller Xtreme Energy XR274HR-10 (PN 23-710-9)
-Valve springs and roller hydraulic lifters to match the cam (Comp Cams)
-Installed cam at 0 degrees, no cam advance, set it up just like the card said and it checked good
Pistons - forged aluminum flat tops (can't remember manufacturer and I don't have my engine book with me)
compression ratio calculated at 10.5:1
Carbs - six pack set up by ProMax carbs
-I had them do the work of rebuilding the carbs and they set them up on their 440 so I should have a decent baseline to work with
Edelbrock aluminum six pack intake
Transmission - A833 4 speed
rear end gears - 3.55 sure grip
Headers - old rusty set of Summit headers for break in, I think they are 1-3/4" primaries
-I have a set of Hooker ceramic coated headers ready to install once I break the engine in, (1-7/8" primaries)
Exhaust - 3" flowmaster "American Thunder" system
I also have a list of the carb settings installed by ProMax, but I don't have them with me right now. If you think that would help, let me know, and I can look those up later. If there is anything else you think would be helpful please let me know. Thanks for reading.