I got a mate who is running a 440 bigblock which is setup with half filled grout filled to the height of water jackets .
It is high performance motor which has an external oil cooler setup fitted between trans cooler and radiator .It also has a remote mounted oil filter and dash12 hose feeding the circuit.
The car has an oil temp guage which has a sender located at the oil pump He is concerned about what is correct oil temp and what is excessive .
The car runs on avgas and a bit of premium mixed in he reckons if anything the tune is fat . I am not sure what compression ratio the engine is .
I am just wondering if anyone can give me a bit of a idea of what is acceptable and when the alarm bells need to start ringing?
Garth
10 replies to this topic
#1
fatslr
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Posted 21 November 2011 - 02:42 PM
#2
rodomo
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Posted 21 November 2011 - 04:01 PM
My ol' Rangie has a factory fitted oil temp guage that is in the red at 140c....................if that's any guide?
#3
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Posted 21 November 2011 - 04:08 PM
Maybe shoot an email to your oil manufacture and post up the answer...
#4
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Posted 21 November 2011 - 06:22 PM
Which sounds like a real good idea, as each brand WILL give a different answer due to the different additives.
#5
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Posted 22 November 2011 - 07:34 PM
260 deg F is too hot.
iv read in a couple of books from some big name engine builders, they say bout the 220, 230 deg F is ideal.
it will vary a little with type of oil, mineral based oils really dont like been cooked.
synthetics bit more forgiving.
hope that helps.
iv read in a couple of books from some big name engine builders, they say bout the 220, 230 deg F is ideal.
it will vary a little with type of oil, mineral based oils really dont like been cooked.
synthetics bit more forgiving.
hope that helps.
#6
fatslr
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Posted 23 November 2011 - 09:19 AM
Thanks for the input my mate is going to relocate his oil cooler to front of the radiator assembly in an attempt to get better cooilng .
He reckons it is up around 250+ when going down the freeway so is concerned.
My theory for him was a bit like my KTM Use topgrade oil like Redline or equivalant and change oil frquently ,i change the oil in my bike every 300ks as a preventative measure bit of a pain in the arse but High Performance = High Maintenance as a general rule.
He reckons it is up around 250+ when going down the freeway so is concerned.
My theory for him was a bit like my KTM Use topgrade oil like Redline or equivalant and change oil frquently ,i change the oil in my bike every 300ks as a preventative measure bit of a pain in the arse but High Performance = High Maintenance as a general rule.
#7
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Posted 24 November 2011 - 08:22 AM
Definitely do frequent changes if it gets too hot, as the temp will break down the oil quicker.
#8
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Posted 25 November 2011 - 08:35 PM
hey garth the temp should be around 20 degrees lower so the oil should be 20 below what the warter should be around that if the car is runing on a good tune thats how they hav told me so i have got the oil temp set in the sump see if that helps him out cheers
#9
fatslr
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Posted 25 November 2011 - 11:55 PM
Cheers Greg
I suggested to him also to use a ray gun and take some temp readings to see how efficient the oil cooler is working.
The sump in his car is huge - the steernig rack actually passes through it full custom setup do you remember the black and orange 440 cuda at the 1/8th mile drags .
Garth
I suggested to him also to use a ray gun and take some temp readings to see how efficient the oil cooler is working.
The sump in his car is huge - the steernig rack actually passes through it full custom setup do you remember the black and orange 440 cuda at the 1/8th mile drags .
Garth
#10
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Posted 26 November 2011 - 09:41 AM
Incredible as it may seem many synthetics will run for thousands of hours at temps of around 250 - 260F without significant degradation. So all that really needs to be done is to select an oil with the appropriate viscosity at the engines usual operating temperature. With "normal" bearing clearances you'd aim for somewhere around 20 to 30cSt. This sort of info is normally available from the Technical Data Sheets from the manufacturers web sites. It's also a good idea to check the low temp viscosity as well as (especially with mineral oils) you may have to treat a cold engine quite gently if it has a wide range of operating temps.
#11
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Posted 26 November 2011 - 06:11 PM
the heat gun works good then he can check a few spots yep i remember the car it was alright , when we do a bit more to the car i will put a couple photos up see ya
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