I was wondering what kind of changes in the operating temps people had when they changed to aluminum heads what your temps were with IRON heads and now with the alum heads. I have a set of alum heads but and fighting a heating (or I should say cooling) problem and dont want to put a new set of alum's on and warp them. Also will running lean increase the heat? I keep getting a code 13 that comes and goes . Thanks guys

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'87 Monte Carlo SS,with '89 IROC 350,700 trans, blew up 3.73 posi stuck with crappy 2.73's neeed gears! hooker headers, flow's 2 1/2" exhaust true dualls

 

SS,

I'd look for a 20* reduction, all else being equal. And yes, lean = heat, bigtime. Richen the mixture a tad and you'll see the temp come down.

Good luck.

BOR

 

As for cooling with Al heads, run ONLY deionized water with a healthy 50/50 mix of coolant, otherwise your heads will start to corrode eventually. Oh and code 13 is the O2 sensor, time for a new one. HTH

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George P. Lara
1984 Z28 High Output
Proud Member of SCFB
V6 T5 For Sale

 

thanks guys I guess Ill have to stick my AFPR on here real soon