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davepl · 03-17-2019, 10:16 AM

FWIW, mine is a completely bone stock 402 except it uses R-134 and has dual exhaust. Otherwise, factory down to the heat riser, choke, etc.

It will creep in warm traffic. IT's OK while rolling. But it'll eventually hit 230+ sitting at a light, so I added a thermostatic fan in between the rad and the condenser and that seems to have crutched it enough. I'd recommend the extra emergency fan.

03-17-2019, 10:16 AM	#42
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: How hot do Big Blocks normally run? FWIW, mine is a completely bone stock 402 except it uses R-134 and has dual exhaust. Otherwise, factory down to the heat riser, choke, etc. It will creep in warm traffic. IT's OK while rolling. But it'll eventually hit 230+ sitting at a light, so I added a thermostatic fan in between the rad and the condenser and that seems to have crutched it enough. I'd recommend the extra emergency fan. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible