67 cam with 396 BB running as high as 230-240
#1
67 cam with 396 BB running as high as 230-240
I’m a rookie at this as this is my first classic car, question; Will using high octane gas cause my older engine to run hotter than normal? I have aluminum radiator and dual fans but my engine runs hot.
#4
This comes up fairly often,big blocks make a lot of heat,a radiator with electric fans usually doesn't keep up because they just don't draw enough air.
A standard stock type 6 blade fan with a fan clutch and a full shroud usually takes care of the problem.
A standard stock type 6 blade fan with a fan clutch and a full shroud usually takes care of the problem.
#5
Thank you very much, until I look into getting that: at what point should I be concerned and stop running the engine?
#6
Oh and on the gas,no and in fact you are far better off with high octane in a high compression engine,common misconception is that high octane fuel burns hotter,it does not and in fact is less volatile. Regular gas tends to pre-ignite from compression heat,that's what causes knock and you've probably heard the term dieseling when you turn the key off but the engine keeps trying to run. Diesel engines fire off compression heat (very high compression) without a spark,hence the term.
Higher octane fuels are harder to ignite so they don't fire until the spark pops them off,high performance engines run higher compression which is why higher octane fuels were developed years ago as car makers were striving for more HP by using increased compression ratios.
Last edited by Y2Keglide; 07-07-2019 at 11:02 AM.
#7
what is the compression of your engine ???? how many core is the radiator ? how much cfm does the fan move? do you have it pushing or pulling? do you have a shroud ?
these are just a few of the ?s that need answered
I run a sb chevy on the dirt track with 13-1 compression for 3 years that reached 230-240* , but I changed the oil every week
these are just a few of the ?s that need answered
I run a sb chevy on the dirt track with 13-1 compression for 3 years that reached 230-240* , but I changed the oil every week
#8
what is the compression of your engine ???? how many core is the radiator ? how much cfm does the fan move? do you have it pushing or pulling? do you have a shroud ?
these are just a few of the ?s that need answered
I run a sb chevy on the dirt track with 13-1 compression for 3 years that reached 230-240* , but I changed the oil every week
these are just a few of the ?s that need answered
I run a sb chevy on the dirt track with 13-1 compression for 3 years that reached 230-240* , but I changed the oil every week
#9