Re: Heat sink on trans
[Re: dragon]
#2936757
06/25/21 05:58 PM
06/25/21 05:58 PM
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Joined: Jan 2005
Posts: 12,406 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
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Not on my transmission butt on my 6.4 engine in my 2011 ram 1500 the oil temp would creep up pulling a trailer up big hills and I glued several old computer heat sinks to the pan and it helped quite a bit. Kept the temp from spiking as high and cooled back down much faster after hitting the top of the hill.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Heat sink on trans
[Re: Moparite]
#2936942
06/26/21 11:42 AM
06/26/21 11:42 AM
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Joined: Dec 2005
Posts: 11,408 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
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I used the old Russell heat sink cooler, Mounted under the car close to the trans. Worked fine. No hoses strung all over the car. Able to be taken apart and cleaned. Moroso and some others sell heatsink style coolers.
Not for use on a street car. Drag race only. A car that regularly gets hot lapped may want to go to one of the units with it's own fan.
If the results don't match the theory, change the theory.
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Re: Heat sink on trans
[Re: CMcAllister]
#2937456
06/27/21 09:01 PM
06/27/21 09:01 PM
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Joined: Aug 2009
Posts: 2,036 Mooresburg, Tn
'72CudaRacer
top fuel
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top fuel
Joined: Aug 2009
Posts: 2,036
Mooresburg, Tn
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I run a Morroso finned heat sink cooler on my bracket car. Been using it for about 25 years. I mounted mine near the transmission tunnel, just in front of the rear axle, and run strato-flex lines(#5) to it. Never had any issue with it or transmission over heating. 440, 727, Turbo Action "J" converter, running 10.50 1/4 miles times. I used to run two classes at the same events, but now just double enter same class sometimes, no problems.
Brian
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Re: Heat sink on trans
[Re: '72CudaRacer]
#2937630
06/28/21 12:32 PM
06/28/21 12:32 PM
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Joined: Mar 2003
Posts: 2,485 PA
moparacer
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top fuel
Joined: Mar 2003
Posts: 2,485
PA
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It wont work as good as a cooler/fan unit naturally but if you do try it I would run a trans temp gauge to keep track of it.
The main thing I am always concerned with is temp consistency for bracket racing. I tried a heat sink on my dragster years ago and didnt like the trans temp climbing every pass like it did, especially when hot lapping. Put a cooler on it to keep the temp more consistent.
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: Heat sink on trans
[Re: dragon]
#2937679
06/28/21 02:16 PM
06/28/21 02:16 PM
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Joined: Oct 2007
Posts: 4,205 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,205
New York
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The terms are confusing.
In electronics, a "heat sink" is a device that attaches directly to a component with a temperature problem. Heat transfers from the hot component to the sink by conduction (based on the shared surface area and thermal characteristics). The sink has fins from which the temperature is lost by radiation. There is no liquid exchange.
The devices sold as heat sinks appear to be remote radiators which receive hot ATF from (and return to) the transmission, and cool mostly by convection (air movement due to vehicle speed) and less by radiation. Since many do not have fans and are not located in an air path with a pressure differential, they are less effective. Some locations may place the sink in hot air from the engine bay, exhaust, water radiator, etc. and do very little. If you're going to use one, I suggest placing a temperature probe in a few places and compare.
Boffin Emeritus
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Re: Heat sink on trans
[Re: polyspheric]
#2937714
06/28/21 04:23 PM
06/28/21 04:23 PM
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Joined: Dec 2005
Posts: 11,408 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
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The terms are confusing.
In electronics, a "heat sink" is a device that attaches directly to a component with a temperature problem. Heat transfers from the hot component to the sink by conduction (based on the shared surface area and thermal characteristics). The sink has fins from which the temperature is lost by radiation. There is no liquid exchange.
The devices sold as heat sinks appear to be remote radiators which receive hot ATF from (and return to) the transmission, and cool mostly by convection (air movement due to vehicle speed) and less by radiation. Since many do not have fans and are not located in an air path with a pressure differential, they are less effective. Some locations may place the sink in hot air from the engine bay, exhaust, water radiator, etc. and do very little. If you're going to use one, I suggest placing a temperature probe in a few places and compare. Mostly true. The heat sink has fins (i.e. surface area) internally as well as externally. Heat will transfer from the oil into the cooler sink. Heat is then transferred from the sink to air. Very effective at "pulling" heat from the fluid, even if there is no airflow - until it reaches near or the same temp as the oil. However, airflow will help, obviously, so a fan is a plus. I put them under the car away from exhaust/engine heat as much as possible. Being able to take it apart and clean it is a big plus for me using one. Again, not for a street car, tow truck, etc.
Last edited by CMcAllister; 06/28/21 04:24 PM.
If the results don't match the theory, change the theory.
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Re: Heat sink on trans
[Re: dragon]
#2937769
06/28/21 06:49 PM
06/28/21 06:49 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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After using really big tranny cooler on many drag race cars I finally put a tranny temp gauge in one and found out that tranny fluid never got above 160 F, way to cool for most tranny fluids to work well No tranny coolers on my drag cars only now I do put bigger tranny pans on them now The cast aluminum finned pans work as a heat sink also
Last edited by Cab_Burge; 06/28/21 06:51 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Heat sink on trans
[Re: Cab_Burge]
#2937781
06/28/21 07:25 PM
06/28/21 07:25 PM
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Joined: Mar 2003
Posts: 2,485 PA
moparacer
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top fuel
Joined: Mar 2003
Posts: 2,485
PA
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After using really big tranny cooler on many drag race cars I finally put a tranny temp gauge in one and found out that tranny fluid never got above 160 F, way to cool for most tranny fluids to work well No tranny coolers on my drag cars only now I do put bigger tranny pans on them now The cast aluminum finned pans work as a heat sink also Every try that with a loose converter and a glide Cab? The best way to watch trans temp is with a temp gauge in the outlet line to the cooler. Tells you exactly what temp the fluid in the converter is. You would be surprised how fast the converter heats the fluid in some setups. Anyways you always want the trans temp the same every pass if possible for more consistent RTs. Least that is what I found over the years.
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: Heat sink on trans
[Re: moparacer]
#2937840
06/28/21 09:57 PM
06/28/21 09:57 PM
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Joined: Dec 2005
Posts: 11,408 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,408
Fulton County, PA
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Loose converter, glide, pro tree racing with no 2 step. Just stage it, set the brake and mat it. Never a temp issue with my little heat sink. Very few class cars run a cooler.
And temp should be taken in the pan.
You won't have the luxury of having the fluid the same temp every pass most of the time. Especially hot lapping in late rounds. Just have to know your car and use the trans temp to help dial it. I knew what mine would pick up if it didn't cool for at least an hour or so.
If the results don't match the theory, change the theory.
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Re: Heat sink on trans
[Re: moparacer]
#2937874
06/29/21 02:36 AM
06/29/21 02:36 AM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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My S/P bracket car has a glide with a B&M heat sink plate type tranny cooler mounted under the floor behind the tranny a little bit, it does have room (maybe 3/4 to 1 1/4 inch) for air to circulate over the top. I run it at a local 1/8 mile track and have never seen the tranny temp above 170F after a run leaving at 5200 RPM for 1.01 seconds before the tranny brake releases I do heat it up before making a run against the tranny brake in the staging lanes to above 100 F to make sure it has some heat in it before racing it also The sender is in the left rear corner of the cast aluminum deep tranny pan
Last edited by Cab_Burge; 06/29/21 10:55 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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