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Lunati tech guys said 14 was about right for this cam. Ditto on the 70s, my 383 road runner never had this sort of problem and I drove the s..t out of that car. I’ll give the timing retard a shot next time. Why wouldn’t the timing (if that is the prob) effect cold starts?
Lunati tech guys said 14 was about right for this cam. Ditto on the 70s, my 383 road runner never had this sort of problem and I drove the s..t out of that car. I’ll give the timing retard a shot next time. Why wouldn’t the timing (if that is the prob) effect cold starts?
Lunati 60303 cam, duration @ .05: 226I/234E. I’ve been down the vac leak road, which is not to say I don’t have one, I just haven’t been able to find it if there is one. 440 idles at about 14″ vacuum, reasonably steady. All vac hoses are new.
Lunati 60303 cam, duration @ .05: 226I/234E. I’ve been down the vac leak road, which is not to say I don’t have one, I just haven’t been able to find it if there is one. 440 idles at about 14″ vacuum, reasonably steady. All vac hoses are new.
I believe there are several things working against me…2 of them you mentioned. The necessary base timing and heat soak. Using the original starter, even tho rebuilt, probably makes it more susceptible to heat soak. I’ve picked up a new, higher torque, starter that a lot of guys are using on these cars. Gonna try the new starter and see what happens. If it starts when warm, probably means the orig starter, even tho rebuilt, is overmatched by the base timing, heat, and tight engine tolerances.
I believe there are several things working against me…2 of them you mentioned. The necessary base timing and heat soak. Using the original starter, even tho rebuilt, probably makes it more susceptible to heat soak. I’ve picked up a new, higher torque, starter that a lot of guys are using on these cars. Gonna try the new starter and see what happens. If it starts when warm, probably means the orig starter, even tho rebuilt, is overmatched by the base timing, heat, and tight engine tolerances.
I agree, it is too much base timing, but it won’t idle below 18-19deg. I’m idling on the transition circuit – have tried everything to get to “square”, except drilling the center butterflies. Leaving that as last resort. Been thinking about going to one of the new high torque mini-starters to see if that helps.
I agree, it is too much base timing, but it won’t idle below 18-19deg. I’m idling on the transition circuit – have tried everything to get to “square”, except drilling the center butterflies. Leaving that as last resort. Been thinking about going to one of the new high torque mini-starters to see if that helps.
[quote=”619DioFan” post=50651]did you crank up the compression ? if so you may need a high output starter. are you running headers ? if so you may be ” heat soaking ” the starter solenoid. a starter wrap and or header wrap will cure that prob.[/quote]
no headers, compression is 10:1, base timing at 19deg; the base timing may have an effect here, but it won’t idle or run right without that much base (its a 6 pack)
as to heat soaking, it is definitely heat related, perhaps ignition or starter contacts
[quote=”619DioFan” post=50651]did you crank up the compression ? if so you may need a high output starter. are you running headers ? if so you may be ” heat soaking ” the starter solenoid. a starter wrap and or header wrap will cure that prob.[/quote]
no headers, compression is 10:1, base timing at 19deg; the base timing may have an effect here, but it won’t idle or run right without that much base (its a 6 pack)
as to heat soaking, it is definitely heat related, perhaps ignition or starter contacts
No problemo. The 8v “reading” is ambiguous at best. VOM was jumping around. I need to find one with a storage (min/max) feature. Autozone can probably test it also.
No problemo. The 8v “reading” is ambiguous at best. VOM was jumping around. I need to find one with a storage (min/max) feature. Autozone can probably test it also.
Thx for the suggestions. On 440s the starter sits below the left manifold, the wires run down the inner fender, not really too close to the manifold.
I’ll do the starter test and voltage drop tests. Another interesting aspect of this was the 440 was broken in on a test stand and didn’t have the warm cranking problem.
Thx for the suggestions. On 440s the starter sits below the left manifold, the wires run down the inner fender, not really too close to the manifold.
I’ll do the starter test and voltage drop tests. Another interesting aspect of this was the 440 was broken in on a test stand and didn’t have the warm cranking problem.