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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12754 Location: Melbourne
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 Posted: Sat Sep 14, 2019 12:52 pm |
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I'm not speculating, I have plenty of experience with Jimny autos. The precise numbers you see will be unique to your operating parameters, but the fact is you're seeing 105˚ with the converter unlocked currently, you have 7˚ of delta across your "cooler" and you haven't added any of your planned load.
You need lots more cooling.
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KYPHONII
Joined: Sat Nov 05, 2011 7:55 pm Posts: 45 Location: townsville
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Posted: Sat Sep 14, 2019 1:32 pm |
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Bypassed the radiator
Large cooler in front of and to the left of the thermo fan
Ambient 30 degrees
Prolonged Idle in neutral AC on
57 degree out of the 55 degrees in
Engine 87
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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12754 Location: Melbourne
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Posted: Sat Sep 14, 2019 2:44 pm |
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I don't really understand what you've posted. The transmission isn't generating any heat in the scenario you've described, there's next to no cooling airflow with the engine at idle and the car stationary.
It does show that the engine isn't putting any heat into the auto though - with the engine at 87 the transmission would be being heated by the bottom radiator tank.
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KYPHONII
Joined: Sat Nov 05, 2011 7:55 pm Posts: 45 Location: townsville
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Posted: Sat Sep 14, 2019 6:20 pm |
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KYPHONII wrote: Bypassed the radiator
Large cooler in front of and to the left of the thermo fan
Ambient 30 degrees
Prolonged Idle in neutral AC on
57 degree out of the 55 degrees in
Engine 87
Sent from my iPhone using Tapatalk Pro Road test highway. late afternoon about 22 degrees ambient At 100 - 110 kph the transmission box sat on 57 The out put temp between 55 and 60 The input temp about 6 degrees cooler (through the cooler )than the output. Didn’t seem to vary much. Sent from my iPhone using Tapatalk Pro
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KYPHONII
Joined: Sat Nov 05, 2011 7:55 pm Posts: 45 Location: townsville
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Posted: Sat Sep 14, 2019 6:28 pm |
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Gwagensteve wrote: I don't really understand what you've posted. The transmission isn't generating any heat in the scenario you've described, there's next to no cooling airflow with the engine at idle and the car stationary.
It does show that the engine isn't putting any heat into the auto though - with the engine at 87 the transmission would be being heated by the bottom radiator tank. Just info that will probable come to gather at the end.
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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12754 Location: Melbourne
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Posted: Sat Sep 14, 2019 6:30 pm |
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KYPHONII wrote:
Road test highway.
late afternoon about 22 degrees ambient
At 100 - 110 kph the transmission box sat on 57
The out put temp between 55 and 60
The input temp about 6 degrees cooler (through the cooler )than the output. Didn’t seem to vary much.
Considering "normal" transmission temperature is 80˚ you can see the amount of headroom you've given yourself but ditching the in-radiator "cooler"
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KYPHONII
Joined: Sat Nov 05, 2011 7:55 pm Posts: 45 Location: townsville
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Posted: Sun Sep 15, 2019 11:28 am |
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Running fluid in to bottom radiator tank then in to large cooler and back to transmission pan
Ambient 27, Air Conditioner on.
Start at the Bottom of Castle Hill lookout.
engine 85 tran out 71/ in 68
At the Top of the 3.5 klm lookout run
Body 77/ engine 86
Out 80/ inlets 73
3000rpm 2nd gear include 20 stop starts on speed bumps.
Back at the Bottom
Engine 78 body 67
Out 67 / in 62
Prolonged Idle 98 body 67
In 66 out 67
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Gwagensteve
Joined: Thu Feb 26, 2009 10:30 pm Posts: 12754 Location: Melbourne
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Posted: Sun Sep 15, 2019 1:46 pm |
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So the in-radiator "cooler" is adding about 10˚ to your trans operating temperature from the looks of it.
If you're comparing apples to apples (not entirely clear, you post different distances to your lookout) you've taken 15˚ out of your auto under similar test conditions. That's a great outcome.
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KYPHONII
Joined: Sat Nov 05, 2011 7:55 pm Posts: 45 Location: townsville
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Posted: Sun Sep 15, 2019 2:34 pm |
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I’m interested in the extreme temp spike that a trailer and a mountain will put on the system but that will need to wait till the tow bar turns up.
The Castle Hill is a shorter sharper climb than Mount Stuart, it has a slower speed of 40 kph and the stop starts on the converter from all the speed bumps.
It’s 3.5 ? Klm of second gear.
Interesting observation about running through the radiator then the air cooler is that the transmission seems to cool the engine temp a little, that appears to stabilize the radiator temp down about 5 to 10. The air cooler then cools the fluid to about 65 and the transmission puts about 6 degrees back in before it get back to the radiator still 10 to 15 degrees below the thermostat regulated radiator. Seems to be a win win . I couldn’t get the fluid to the 105 I had on the first test with out the air cooler.
Also I didn’t get the gradual build of temp with the stop start town driving from the original set up. Just stabilize at about 65 coming out the transmission.
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KYPHONII
Joined: Sat Nov 05, 2011 7:55 pm Posts: 45 Location: townsville
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Posted: Sun Sep 15, 2019 7:21 pm |
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Mt Stuart again
Radiator through air cooler
Ambient 20 Ac off
Engine 87 auto pan 76
Out 80 max, fluid in 76
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vet 180
Joined: Mon May 05, 2014 11:50 am Posts: 1243
Vehicle: Vitara 1994
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Posted: Sun Sep 15, 2019 7:48 pm |
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Gwagensteve wrote: So the in-radiator "cooler" is adding about 10˚ to your trans operating temperature from the looks of it.
If you're comparing apples to apples (not entirely clear, you post different distances to your lookout) you've taken 15˚ out of your auto under similar test conditions. That's a great outcome. I don’t think it’s apples to apples as first comparison was highway. The second is a stop start mountain run. Second run obviously has a lot more stress. Either way temps look good and the data is great Sent from my iPhone using Tapatalk
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KYPHONII
Joined: Sat Nov 05, 2011 7:55 pm Posts: 45 Location: townsville
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Posted: Sat Sep 21, 2019 9:37 am |
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Trailer 430 kg Ambient temp 25 degrees 100 kph Highway 62 out of transmission in to radiator 55 out of air cooler in to pan The cool fluid going in to the radiator is keeping engine temp down. Mt Stuart 9 klm 600 m elevation. Ambient 25 air con on At the base engine 92 Transmission Pan 68 Fluid going in 65 Fluid coming out 67 At the top Max temperatures achieved Engine 92 on hill 101 stopped at top Transmission pan 87 max Transmission max temp out of the converter 91 Didn’t not temp in. No point and it’s a bit narrow with the weekend bikes playing.  Sent from my iPhone using Tapatalk Pro
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KYPHONII
Joined: Sat Nov 05, 2011 7:55 pm Posts: 45 Location: townsville
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Posted: Sat Sep 21, 2019 9:42 am |
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Just add that the 9 klm with the trailer is 2nd gear with some 1 st gear at around 3000rpm
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vet 180
Joined: Mon May 05, 2014 11:50 am Posts: 1243
Vehicle: Vitara 1994
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Posted: Sun Sep 22, 2019 9:31 pm |
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KYPHONII wrote: Trailer 430 kg Ambient temp 25 degrees 100 kph Highway 62 out of transmission in to radiator 55 out of air cooler in to pan The cool fluid going in to the radiator is keeping engine temp down. Mt Stuart 9 klm 600 m elevation. Ambient 25 air con on At the base engine 92 Transmission Pan 68 Fluid going in 65 Fluid coming out 67 At the top Max temperatures achieved Engine 92 on hill 101 stopped at top Transmission pan 87 max Transmission max temp out of the converter 91 Didn’t not temp in. No point and it’s a bit narrow with the weekend bikes playing. Sent from my iPhone using Tapatalk Pro Those temps look fine. Sounds like your set up is working Sent from my iPhone using Tapatalk
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