Re: Transmission Cooler 727
[Re: dOc !]
#635251
03/10/10 06:52 AM
03/10/10 06:52 AM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Almost 30,000 lbs GVW ? ..way WAY toooo big. uNless you are not worrying about "killing" some of the stall speed of the converter.
I know guys that run 10 and 9" converters ON THE STREET with the radiator ATF cooler/warmer only !
explain how it will effect the converter?
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Re: Transmission Cooler 727
[Re: Ron Silva]
#635253
03/10/10 01:35 PM
03/10/10 01:35 PM
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Joined: Jul 2008
Posts: 30,474 Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,474
Florida STAYcation
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Quote:
Quote:
Quote:
Almost 30,000 lbs GVW ? ..way WAY toooo big. uNless you are not worrying about "killing" some of the stall speed of the converter.
I know guys that run 10 and 9" converters ON THE STREET with the radiator ATF cooler/warmer only !
explain how it will effect the converter?
I put a huge cooler on my Car. I want to go get tacos through the drive through when it is 105 deg outside and I do not want any issues. My Transmission guy said you cannot overcool the fluid in the trans. I specifically asked him about having this huge cooler and driving in the winter. He said not a problem.
TWO points here ...
How will it effect the converter? ..... not up-to-temp ATF will effect stall-speed. Talk to anyone who makes HP converters. And LOOK at how the OEM lockup converters and OD transmissions work ... they do not operate "properly" until the ATF is up-to-temp.
Your trans guy says ATF can not be toooo cool ? .. again - TALK to any converter manufacturer. Now if you are not worried about the stall speed ... it is BESTer to run a huge cooler on a typical HP 727.
THIS is what I plan on using on my motorhome ...which will be going down-the-road at as-much-as 20,000 lbs.
B U T - I will have the biggest FATTEST lowest stall-speed converter I can dig-up.
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Re: Transmission Cooler 727
[Re: dOc !]
#635254
03/10/10 01:41 PM
03/10/10 01:41 PM
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Joined: Apr 2005
Posts: 1,880 USA
Ron Silva
top fuel
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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I don't care if my stall speed varies a couple hundred RPM.
Plenty of Guys will start their car stone cold, do their burnout and them make a pass. No damage to transmission results.
I believe Modern cars delay the converter locking and gear shifting for EMISSIONS reasons.
SRT DEMON ONE SEAT
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Re: Transmission Cooler 727
[Re: Ron Silva]
#635256
03/10/10 04:00 PM
03/10/10 04:00 PM
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Joined: Feb 2007
Posts: 5,080 organ
maximum entropy
master
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master
Joined: Feb 2007
Posts: 5,080
organ
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it is possible to overcool in cold weather, which would require an inline thermostat, if you're not running fluid through the cooler in the radiator (which you should be, trannies, like engines, have optimum operating temperatures).
for what is the good life if not doing things thoughtfully?
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Re: Transmission Cooler 727
[Re: dusturbd340W5]
#635257
03/10/10 04:06 PM
03/10/10 04:06 PM
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Joined: Aug 2005
Posts: 761 Southington Ct.
turbobitt
super stock
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super stock
Joined: Aug 2005
Posts: 761
Southington Ct.
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I'm in the process of doing some transmission dyno testing on some brand X TH400 stuff. I don't think the trans fluid temp will vary the stall that much but will say that the bar and plate style coolers have significant flow restrictions. We seen very high converter charge flow pressures when adding a bar and plate style cooler. I would tend to think that this would decrease the stall since the oil is kept in the converter and keeping it full. Allan G.
1970 Challenger w/572 Hemi street car and my pride and joy.
1986 T-Type with 272 Stage 2 Buick V6 engine - True 8 second street car. Just updated the engine and put down 928 HP @ 35# boost to the ground on chasis dyno.
1976 Cee Bee Avenger Jet Boat - 460 Ford powered.
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Re: Transmission Cooler 727
[Re: turbobitt]
#635260
03/10/10 09:06 PM
03/10/10 09:06 PM
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Joined: Apr 2005
Posts: 1,880 USA
Ron Silva
top fuel
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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I was told that Mopars do not pressurize the cooler much if at all. That the oil exits the converter working circut and then goes through the cooler and drains over some bearings,bushings etc right into the Pan. I would have never expected that much pressure in the trans cooler. I do not know what he did to restrict the charge circut. But the car drives the same with the same 60 foot.
SRT DEMON ONE SEAT
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