Steve I'm not suggesting that the fan is the sole problem here but first off you need to re-create the scenario of driving at say 60mph at roughly 3,000 rpm. You need lots of air flow. The rad your using maybe adequate as well. Again just my 2 cents. Good luck
Hey, who knows whose wrong or right? We're all just guessing, really. I do KNOW 30 degrees is too retarded for break in. That's why I recommended pulling in more timing. He could well have multiple issues. Hard to diagnose over the internet.
Have a non OD 4 speed. It's really pitted, side cover is broken. Internals look really good. Turns smooth. Unknown year. Unknown numbers. Unreadable. Pick up in Bay city Wisconsin or South st Paul mn
Unknown thermoquad believe was off a 74-78 c body 400ci. $20
$450? May take trades on...
Damn, I hate it when I am wrong. I misread the initial post. I thought Steve was saying that it ran OK the first time but overheated the second time with the thermostat. I was basing all my thoughts along that line.
There are more aspects to a power curve than wide open. I can certainly see the added timing not making a difference in peak numbers. What about in the car and under the true load of the car at lower RPMS? It's entirely possible it could pick up elsewhere. Do you happen to know the cranking PSI...
Thanks guys, no idea on ring gaps, they are within specs tho. Rpm was 2-2800
Yeah the fan in video is pretty lousy but when we broke in the 273 the rad was "good enough". Same rad too.
True for many aspects of tuning but wouldn’t wide open throttle at max rpms under load be similar in both cases ? In the car engine bay heat would become a factor but that would call for less timing I would think .