Originally Posted By mopar dave
I thought too much timing would make them run hotter? Had a 69 Roadrunner i tuned up for a guy about 35yrs ago. The 383 in it always ran hot after i gave it a super tune which was a dist dissemble,cleaning and a good recurve with the lightest springs i could find installed, cranking timing up and a carb rebuild. Ran great,but always ran hot. Never figured it out and yrs later i start hearing about too much timing causing an over heat issue. Figured thats what it was.

yep to much timing, did you limit his total timing ?
on my 512 with the vac adv on ported vac on the freeway it runs about 5 to 10 deg cooler hooked up. have had other cars do the same.


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5