[rbwjr325]

OK,Anybody know why my header temps are so far apart,60 to 80 deg. diff. Small block,new BB rad(3core)Harrison,Hi flo wiend pump,190 therm,6 inch crank pulley ,5 inch WP pulley,yeah I know the ratios not perfect,flex fan ,shroud,car has ALWAYS heated up,especially over 75mph,faster I go ,hotter it gets,Screamer motor but Im ready to yank it,,

 

[BACK FROM THE DEAD]

Sounds like you may need to check your jetting and timing.

Header temps being off by a good margin indicates a difference in combustion temps. Probably due to either a fuel or an ignition problem.

Running lean will make for hot headers, and retarded ignition timing will make for a hot engine temp.

What is the engine in question? It's not a 400 block by chance is it, if so do the heads have steam holes drilled?

 

[rbwjr325]

383 crate motor,

 

[cv67]

Noticed #3 was noticeably hotter than 1 the other night chalk it up to the ports being right next to eachother. Oh well runs good.

 

[rbwjr325]

Duplicate?,whatever,Anyway,the rad. temp. climbed to 223 in the five minutes I was checking the temp. on header tubes,,very frustrating,,,would have gotten hotter if I didn't shut down,,four years I have fought this prob.Thats 4 yrs.Numerous thermostats,drilled & not drilled,numerous fans,with shroud & without,I have to believe all stroked motors do this,,66 Malibu maby needs a 454,,,