Author Topic: Cooling info please.  (Read 5706 times)

Offline gafletch

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Re: Cooling info please.
« Reply #15 on: June 08, 2015 - 08:02:33 PM »
I'll check the timing, go with a 25/75 water/coolant mix and look for a better air cleaner assembly. Thanks.




Offline dodj

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Re: Cooling info please.
« Reply #16 on: June 08, 2015 - 08:53:23 PM »
I'll check the timing, go with a 25/75 water/coolant mix and look for a better air cleaner assembly. Thanks.
75% water and 25% coolant.  :2cents:

Water transfers heat better than prestone etc, the coolant is for freezing and corrosion.
Scott
1973 Challenger  440 4 spd 
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Offline Strawdawg

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Re: Cooling info please.
« Reply #17 on: June 08, 2015 - 08:56:14 PM »
75% water and 25% coolant.  :2cents:

Water transfers heat better than prestone etc, the coolant is for freezing and corrosion.

yes!

Offline 734406pk

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Re: Cooling info please.
« Reply #18 on: June 08, 2015 - 10:54:29 PM »
I'll check the timing, go with a 25/75 water/coolant mix and look for a better air cleaner assembly. Thanks.

You may want to try 66% water and 33% antifreeze mix. It will give you -17 deg F and a good heat transfer. Is the aluminum radiator bare or has it been painted?
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
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Offline Chryco Psycho

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Re: Cooling info please.
« Reply #19 on: June 08, 2015 - 11:25:40 PM »
I do not see the coolant mix solving your problem + with too much water in there it may freeze & kill the block , less than 60% in an unheated garage was likely t freeze & split the block in AB 

Challenger - You`ll wish You Hadn`t

Offline gafletch

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Re: Cooling info please.
« Reply #20 on: June 09, 2015 - 08:46:55 AM »
Unpainted radiator. May move the trans cooler forward from off the radiator too. 60 water/40 coolant mix. I'm getting there!

Offline 734406pk

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Re: Cooling info please.
« Reply #21 on: June 09, 2015 - 09:39:57 PM »
Distilled water would be best. Using less antifreeze and more water will decrease the specific gravity (density) of the mix and increase its heat transfer capability. But on the downside as CP points out, you lose freeze protection and lowers the boiling point, so be certain to adjust the mix for the season or drain completely for storage. Better to be safe here. The aluminum cylinder heads transfer more combustion heat into the coolant than the cast iron factory heads did, so there is more heat load into the cooling system that must be transferred to the air via the radiator. Therefore the radiator will need as much help with airflow as possible. Also proper coolant circulation is important. Pulley ratios, water pump impeller clearence etc. should be checked as posted earlier. I had a customer a few years ago that had a similar over heat problem. It turned out that he painted the aluminum radiator so well it insulated it enough and ran hot at low speed. Good luck in finding the cure!
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive

Offline cudabob496

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Re: Cooling info please.
« Reply #22 on: June 10, 2015 - 12:29:00 AM »
Distilled water would be best. Using less antifreeze and more water will decrease the specific gravity (density) of the mix and increase its heat transfer capability. But on the downside as CP points out, you lose freeze protection and lowers the boiling point, so be certain to adjust the mix for the season or drain completely for storage. Better to be safe here. The aluminum cylinder heads transfer more combustion heat into the coolant than the cast iron factory heads did, so there is more heat load into the cooling system that must be transferred to the air via the radiator. Therefore the radiator will need as much help with airflow as possible. Also proper coolant circulation is important. Pulley ratios, water pump impeller clearence etc. should be checked as posted earlier. I had a customer a few years ago that had a similar over heat problem. It turned out that he painted the aluminum radiator so well it insulated it enough and ran hot at low speed. Good luck in finding the cure!

you also lose corrosion protection
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

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