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Re: Cooling issue
[Re: NITROUSN]
#3131847
03/24/23 08:19 AM
03/24/23 08:19 AM
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Joined: Mar 2005
Posts: 2,060
Pendleton NY
terzmo
OP
top fuel
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OP
top fuel
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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So wrong to compare a 95 engine with a 67 as far as cooling systems What is the difference? The differences? Clearances, efficiency, materials used, and technology. That's not to say that a 67 engine built with todays technology would be any different. To the OP, way to many variables to answer with any certainty IMO  And that is my point. I would assume what he has is all new or newer with all the clearances, tolerances along with technology. so
Last edited by terzmo; 06/26/23 07:44 AM.
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Re: Cooling issue
[Re: terzmo]
#3132023
03/24/23 08:45 PM
03/24/23 08:45 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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I have a 472 hemi in a 67 R/T and the 3 row aluminum rad that cools fine in any temp while cruising down the road. Has a 6 blade steel fan,half a$$ shroud and stock mechanical water pump. No clutch fan, direct. 180 milodon stat. Car will not stay cool while in traffic for a reasonable amount of time. Once rolling it drops temp. Idles at 850 rpm.
I know this is a cooling issue associated with not enough air flow at idle. So I am considering a high flow pump and a 4 row aluminum radiator with shroud and electric fans as the "potential" solution.
I see a few on e-bay but wonder about the quality of the rad and fans. Except for Champion, the others have poor warranties but Champion does not offer a rad with fans and shroud.
Any other suggestions on how to remedy my heating issue and also a GOOD source for a rad/shroud that works for a 67 R/T. Core size must be 26 inch. Also I would like an adjustable temp controller for the fans as most of the ones turn the fans on at 180. I would rather see them on at 190-195 .
Thanks in advance to all. Thanks Moparts Overdrive the water pump. No slower than crank speed if you can’t overdrive it. Never EVER run the pump slower than the crank unless you are shifting at 8k or higher. A 4 core radiator is a bad move.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Cooling issue
[Re: terzmo]
#3132125
03/25/23 10:52 AM
03/25/23 10:52 AM
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Joined: Jan 2003
Posts: 75,043
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,043
U.S.S.A.
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I'm starting with a high flow water pump..The 3 row alum rad is fairly new and restrictions/clogs are not an issue..it cools nicely down the road. I also will work on the shroud and seal any air gaps between it and rad. I also "may" remove the stat so there is nothing to restrict the flow and "IF" it cools I'll reinstall it to see if it makes a difference. If you remove the stat you need to put a restrictor in it's place, water full flowing thru the block/heads is not going to do what it is supposed to do ... transfer the heat from the iron as efficiently as possible. Personally it's a test that is wasting your time and effort as you aren't going to leave it that way. Car will not stay cool while in traffic for a reasonable amount of time. Describe what you consider a reasonable amount of time is please ...
Last edited by JohnRR; 03/25/23 10:54 AM.
running up my post count some more .
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Re: Cooling issue
[Re: Cab_Burge]
#3132202
03/25/23 02:57 PM
03/25/23 02:57 PM
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Joined: Sep 2003
Posts: 19,456
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,456
north of coder
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i agree with Cab on checking your gauges with a heat gun. new parts these days are suspect to me, no matter who or where they are made. it seems nobody has "pride in workmanship" these days............ if one disagrees with me on what is considered "hot", that's ok ! i know what works for me, and if something works for another and they are happy with it, no problem.
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Re: Cooling issue
[Re: JohnRR]
#3132253
03/25/23 05:54 PM
03/25/23 05:54 PM
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Joined: Dec 2014
Posts: 5,846
ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,846
ohio
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I'm starting with a high flow water pump..The 3 row alum rad is fairly new and restrictions/clogs are not an issue..it cools nicely down the road. I also will work on the shroud and seal any air gaps between it and rad. I also "may" remove the stat so there is nothing to restrict the flow and "IF" it cools I'll reinstall it to see if it makes a difference. If you remove the stat you need to put a restrictor in it's place, water full flowing thru the block/heads is not going to do what it is supposed to do ... transfer the heat from the iron as efficiently as possible. Personally it's a test that is wasting your time and effort as you aren't going to leave it that way. Car will not stay cool while in traffic for a reasonable amount of time. Describe what you consider a reasonable amount of time is please ... Personally, days at a time. An engine shouldn't get hot just idling in traffic. But I'm not the OP, maybe he can tolerate 5 minutes before passing himself.
Angry white pureblood male
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Re: Cooling issue
[Re: ruderunner]
#3132314
03/25/23 08:31 PM
03/25/23 08:31 PM
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Joined: Jan 2003
Posts: 7,491
Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,491
Minnesota
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I agree airflow is a likely culprit with the circumstance you describe. But not for certain:
If it has an automatic trans, the heat generated from the converter due to the high idle of a cammed up engine and/or a loose converter can cause the coolant temp to rise from the trans cooler in the radiator. I recommend testing by installing a remote trans cooler and disconnecting the one in the radiator. Or you can drive in traffic and keep popping it into neutral when you are on the brakes to reduce heat from the trans and see if that helps.
Also, what is your timing at idle and off idle, at the RPM that the overheating occurs? It should be at least 20, preferably more, and if you have a operating vacuum advance hooked up to manifold vacuum, that helps too.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Cooling issue
[Re: terzmo]
#3132352
03/25/23 11:52 PM
03/25/23 11:52 PM
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Joined: May 2019
Posts: 713
Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 713
Lake Villa Il
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What is your base ignition timing. May need more initial/then limit total.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Cooling issue
[Re: Sniper]
#3132430
03/26/23 12:16 PM
03/26/23 12:16 PM
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Joined: Mar 2005
Posts: 2,060
Pendleton NY
terzmo
OP
top fuel
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OP
top fuel
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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Didn't
Last edited by terzmo; 06/26/23 07:45 AM.
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Re: Cooling issue
[Re: terzmo]
#3132472
03/26/23 04:03 PM
03/26/23 04:03 PM
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Joined: Dec 2014
Posts: 5,846
ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,846
ohio
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So, much ado about nothing.
Angry white pureblood male
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Re: Cooling issue
[Re: ruderunner]
#3132532
03/26/23 08:53 PM
03/26/23 08:53 PM
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Joined: Jan 2003
Posts: 10,585
Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,585
Freeport IL USA
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So, much ado about nothing. I agree. We ran these old mid - late 60s Mopar motors on a dirt track. 220 is nothing to be concerned about, but it is time to look for a possible problem. After a hard race on a hot evening, our motor often was at 220 by the time it got to the pit stall. Like most others, we were spraying the radiator down as soon as we could get to it as it entered the pits, as soon as the temp started to drop (which was very quickly) we went on to our spot and shut it off. 230 is the shutdown range if the temp isn't dropping really soon (even warm water across the radiator core drops the motor temps fast), 230 could cause the rings to start to loose their tension and could cause a loss of power, long term, and if done multiple times. 235 is shut it down now time. Then let the thing peculate until its below 180 and you still are probably OK, if it becomes a regular feature, I pulled the motor down for inspection.
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Re: Cooling issue
[Re: terzmo]
#3132730
03/27/23 01:19 PM
03/27/23 01:19 PM
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Joined: May 2019
Posts: 713
Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 713
Lake Villa Il
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Before changing anything I would try more initial timing.
Last edited by INTMD8; 03/27/23 01:20 PM.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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