66 Fastback":24cwpwk3 said:The additional timing will increase the idle speed and help cooling. It also helps the engine cope with the load that the AC will put on it. With all new cooling equipment, I think you have a timing problem.
rbohm":24cwpwk3 said:go back over the basics, what causes an engine to run hot. lean fuel mixture, timing advanced or retarded too far
JackFish":24cwpwk3 said:And advanced timing can increase heat, can it not?I see your cam is advanced 4°, what's your static timing?
maybe others would think this is confusing advice...You mentioned that you were thinking of retarding the timing from 14 to 7. That will likely raise the engine temp. To help the cooling, you need to dial in all the ignition advance that you can as long as you don't ping
I guess there is a "middle ground" or magic number to find
so help me think this through...
12* static (raised from 7*)
24* @ 3,000 rpm
total
38* + 4* cam
then add vacuum... ???
My vacuum canister was bad, I replaced it from a 76 chevy truck with a 305, turns out the vacuum can is spot on, 3/4 advance @ 6psi and full @ 10psi. I see 11-13 on idle, and flat I see 14 @ cruise. I'll re-try the stop and go tests.
the rad show's 220 intake, and along the bottom is 195-210, only cooling 10-25* isn't ideal, but seems consistant and the guage sits on 215* (all with AC on) only 12% of the heat!
to me does this rad sound like it's "keeping up"? I mean don't you want the rad to get rid of enough heat to be able to touch the "cool" side?
Edit:
Thanks guys you probably saved me more head ache later, it's funny cause the canister was holding vacuum last week. but the fact that most of last weeks dyno's were ran lean makes me wonder about this canister. I would like to thank all those who posted and helped me fight some heat issues, it just runs hot here in AZ.
An update with the 32hp bolt on carb, the heat stayed consistant around 215 ish with AC on full blast. the engine really wakes up around 3k rpm and is a blast to drive. hopfully i see some stop and go traffic and see where my temp's go. for now I think I'm good to drive.