Originally Posted by BDW
I changed to lower thermostat and it didn't do anything for the high side.
Stock system operated from 205 - 230 (factory fan doesn't turn on until 225)
I replaced with the 193 thermostat, it then operated 195 - 230 frown it's hot here all the time.
I then reprogrammed the fan to come on at 215, so car now operates 195-220.

So unless you live in a cooler area, don't bother, lower thermostat won't do much.


I put a 185 tstat on my 2020 T/A 392, its hot down here in Southeast Tx, it runs 185 all the time in the summer. with the ac on the fans come on & keep it 185, at road speeds it runs 185, in the colder weather not using the ac it will get up to 220 but soon as I get up to speed it cools right back down to 185

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