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Originally Posted by 6camaro9
I usually dont post alot on here I learn more by just reading but I have a little concern with my car and I thougt with all the knowledge on this site somebody could help. This winter I made a few changes to my 400 sbc and now it is running a little warmer than it has in the past. Installed a set of Dart aluminum heads, added vintage air with a front runner system, did away with mechanical fan and now just running a electric fan with a shroud on a griffen rad. I have the condensor and a trans cooler mounted on the front of the rad. My first question is will the aluminum heads run a little warmer and if so how much warmer. The temp gets up to about 190-200 now sitting in traffic as where it use to run about 170-180. Second question is what is a temp. that is too much for aluminum heads. Thanks for any help or suggestions.
Richard
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Hi Richard,
Due to head swap, It could, depending on compression and if you had moved the timing.
At what temperatures are your fans cycling and how are they switched? Could be a simple thing as lowering the turn on time.
What temperature is your t stat rated? 180* would be a good temp.
You have AC so there is more in front of the rad adding to temp.
Much like engine performance, the cooling system must be tuned also.