JVT radiator

TurboStreetCar

Formerly Nosechunks
Feb 25, 2006
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are there any radiators out there that have the automatic tranny cooler in them? Would be nice to have a big aluminum radiator with a cooler in it for us auto guys....
 

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
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A good air cooled type is better for your tranny. Mine likes the tranny fluid at 180 deg F...the best a radiator type can do is 190 degs (usually higher tranny fluid temps though).
 

madsupra88

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Sep 17, 2005
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Johnysupra said:
yeah i Saw those to, They seem way to cheap to be any good. I dunno if your going performance buy proven stuff IMO.


Actually those dont look as cheap as you think, KOYO radiators are only 70 more last time i checked on one. im sure this one is good, you cantreally go wrong with aluminum radiators!
 

TurboStreetCar

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Feb 25, 2006
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jdub said:
A good air cooled type is better for your tranny. Mine likes the tranny fluid at 180 deg F...the best a radiator type can do is 190 degs (usually higher tranny fluid temps though).

Wouldnt that depend on your coolant thermostat? I would be using an external cooler as well, but the best way to regulate somethings temperature something is to influence it with the temperature you want it to be.

This way if my external cooler (with thermostat) over cools the tranny fluid due to its size (might be 200 going in but 150 going out) the radiator will warm it back up to 180 degrees. And if my cooler cant cool it enough (maybe its a hot day or consistent hot tranny fluid heat soaks the tranny cooler, maybe lack of airflow) then the radiator will further cool it to proper 180 degrees.

Or am i over engineering this???
 

madsupra88

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hmm only 20 min away. cool i see your putting in a 2j. Let me know if you need any help, whenever you get the chance you should come check out my project lol goin for a 10sec street car :)

Back on topic, if you want a good aluminum radiator. get a griffin from summit. their like 130 shipped. deff worth the money.my brother is using a griffin on his 9 sec vette! and yes they do work! if your auto, you just need to run a seperate oil cooler.
 

jdub

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nosechunks said:
Wouldnt that depend on your coolant thermostat? I would be using an external cooler as well, but the best way to regulate somethings temperature something is to influence it with the temperature you want it to be.

This way if my external cooler (with thermostat) over cools the tranny fluid due to its size (might be 200 going in but 150 going out) the radiator will warm it back up to 180 degrees. And if my cooler cant cool it enough (maybe its a hot day or consistent hot tranny fluid heat soaks the tranny cooler, maybe lack of airflow) then the radiator will further cool it to proper 180 degrees.

Or am i over engineering this???


You are over engineering this a bit...that's better than not thinking about what you're doing though ;)

Tranny fluid lives a far easier life vs motor oil...what you want is for it never to get too hot. The decrease in viscosity due to higher heat is hard on the various internal parts on an auto tranny. Over cooling a bit is better than allowing the tranny fluid to get hot.

The radiator thermostat has really nothing to do with where the coolant temp stabilizes at...that depends on the capacity of the radiator and how well air flow passes through it assisted by the fan. The thermostat simply opens up at a set temperature...stock is 190 degrees...that is due to what the ECU expects as an optimum temp (176-210 deg F). The problem with the tranny cooler in a stock radiator is that it is too small and the ability of the tranny fluid to transfer heat to the coolant is limited by coolant temps...this is especially true when you are running well above stock HP and putting additional load on the tranny.

If you want to more closely regulate tranny fluid temps, you can use a temp controlled fan on the tranny cooler. Placement of a tranny cooler on this car is difficult to get proper air flow anyway (mine is under the drivers side headlight) and a fan is necessary. This cooler:
B&M SuperCooler
is an excellent choice...the fan functions at 160 deg F.
 

jdub

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I do not, but you could...I would get the 160 deg Mocal. IMO it's over kill...the fan works well (especially since you need one anyway).

I would get a filter for the tranny though...I use a Trasko bypass filter on a PermaCool filter head. It's located pre-cooler to protect the cooler as well.
 

TurboStreetCar

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Im planning on running a 20x10x3/4 cooler (http://store.summitracing.com/partdetail.asp?part=FLX-4126) directly in front of the radiator and using the factory front a/c fan connected to a switch so if im launching my car or its a hot day in bumper to bumper traffic i can turn it on whenever i need.

Im going to run the line from the tranny to a filter, then a thermostat (http://store.summitracing.com/partdetail.asp?part=PRM-1070 that is fully open at 180 degrees putting 95% flow to the cooler), then to the external big cooler, back to the thermostat, into the stock radiator cooler and back to the tranny.

I figure the radiator will help with warm up and regulation of the tranny fluid, its just a secondary cooler in that setup. The Tube and fin cooler i chose was fore its price and size, would it be worth the extra cost for a plate style cooler over a tube and fin? or does the size of the tube and fin cooler give enough cooling ability that it wouldn't matter?

Im going with such a large cooler because i don't want any chance of it getting to hot.
 

jdub

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That should work...just match the hose size (3/8") to the barbs on the cooler and you'll need a 1/2" NPT to 3/8" barb fitting for the thermostat. Same for the filter head. Tube type coolers are not as efficient, but running one that size, it should not matter. It will be protected from rocks and such sandwiched between the radiator and IC too. The cooler is a bit large for cooling tranny fluid, but the thermostat will regulate the flow.

I almost hate to ask...how big and where are you going to mount the oil cooler?
 

TurboStreetCar

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Feb 25, 2006
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Im going to mount it directly in front of the radiator where the condenser usually would go since my car doesn't have air conditioning anymore. Im most likely going to actually mount it to the radiator with a little gap in between. i actually measured the space today because im taking my engine back out to put rods and a converter in, and the opening is roughly 25x15.

My front bumper cover is screwed up so when i remove it to replace with another im going to duct the entire front end openings to the intercooler/radiator area. im also going to make a lip out of rubber/plastic to mount under the lower radiator support to guide any air going under the car, up into the radiator/intercooler area. i want all the air that hits the front of the car to go threw the ic radiator and coolers.

Im thinking about maybe going with smaller ones so i can mount two in front of the radiator next to each other, one for oil and one for tranny, both on thermostats. need to figure it out, times coming soon.