 Under Trunk Temp., Addition to Oil Cooler Thread. |
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| Olympic 914 |
 Jul 15 2020, 07:00 AM
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#1
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 Group: Members Posts: 1,763 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States 
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So on the Oil Cooler thread the suggestion was made to place a thermometer under the trunk to check the temps to determine possible difference for cooling efficiency.
I don't know if anyone had done this before. So I broke this off into a new thread for future reference. One of the Oil Cooler threads http://www.914world.com/bbs2/index.php?showtopic=347075 So yesterday I did this. Using a Wifi endoscope taped to a magnetic tool holder with a thermometer. Placed parallel to the Setrab oil cooler to sample the air temp without the fan blowing directly on the thermometer     And went for a drive. My GF rode along to monitor the temps and take notes. The outside temp was 80 rising to 85 yesterday. Idling in the driveway the temp rose to 125, after 2 miles of two lane roads 30mph it had dropped to 120. at 4 miles stop and go it was still 120, Oil temp 200 CHT 340 onto a two lane road for 11 miles with speeds from 30-50 mph air temp was between 118 + 120 deg Oil temp 212 CHT 322 at this point I stopped for 2 minutes to mimic sitting at a long light or in traffic. the air temp rose to 140 deg Oil temp 210 and CHT 337 Pulled onto 4 lane and accelerated up to 70 mph. After 1/2 mile the air temp had dropped to 125deg oil temp 209 and CHT at 370. mostly level with some slight grades. Turned around at 23 miles Air temp holding at 125 deg Oil temp 213 CHT 330 The battery was low on the endoscope and I had turned it off on the way back, and when I turned it back on I discovered that the duct tape had loosened and I lost my thermometer. My setup is a 2056 9590 cam Djet. , Oil cooler is Setrab 119 fanpack 180 deg oil thermostat and 190 deg sensor for the fan. Exhaust is SS HEs and a Triad muffler. When running in normal summer heat the fan runs constantly. If any one else decides to do this Please add your results here. Tom |
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| GregAmy |
Jul 20 2020, 11:53 AM
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#2
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Advanced Member Group: Members Posts: 2,598 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States
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This just arrived...$52 delivered. Four probes, Bluetooth to the phone, and logging.
Once the weather stops being hot as Hades I'll run a nice 4-point log of some interesting places in the car. I'm thinking one in the engine compartment near the D-Jet plenum, one under the trunk near the transaxle, one inside the intake of my air duct to the rear-mounted oil cooler, and one above the exit of the oil cooler. Then I'll go cook me some steakage... (IMG:http://www.914world.com/bbs2/uploads_offsite/images-na.ssl-images-amazon.com-15565-1595267625.1.jpg) |
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| DRPHIL914 |
Jul 28 2020, 10:59 AM
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#3
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Dr. Phil Group: Members Posts: 5,872 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
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QUOTE(GregAmy @ Jul 20 2020, 01:53 PM)  This just arrived...$52 delivered. Four probes, Bluetooth to the phone, and logging. Once the weather stops being hot as Hades I'll run a nice 4-point log of some interesting places in the car. I'm thinking one in the engine compartment near the D-Jet plenum, one under the trunk near the transaxle, one inside the intake of my air duct to the rear-mounted oil cooler, and one above the exit of the oil cooler. Then I'll go cook me some steakage... (IMG:http://www.914world.com/bbs2/uploads_offsite/images-na.ssl-images-amazon.com-15565-1595267625.1.jpg) cool research thanks for posting, i amgoing to get one of these and do the same, but no shroud on my oil cooler , fan seems like it doesnt come on until about 220, i have a variable rheostat but thats the soonest so i might change this , but i am interested in seeing exact temps for the various locations of themotor even the heads and the oil . could you put one each in alongside each head at the spark plugs , compare 1,2,3,4? i know we say #3 alwys hotter and thatswhere my single CHT gauge lead goes, . got to love technology!! Phil |
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| Olympic 914 |
Jul 28 2020, 11:38 AM
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#4
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Group: Members Posts: 1,763 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States
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QUOTE(DRPHIL914 @ Jul 28 2020, 12:59 PM) fan seems like it doesnt come on until about 220, i have a variable rheostat but thats the soonest so i might change this I used a 190 deg thermo switch inline before the cooler. On at 190 off at 175 (what ever temp you choose it goes off at 15 deg drop) https://www.pegasusautoracing.com/group.asp...ID=SETRABSWITCH |
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| DRPHIL914 |
Jul 28 2020, 12:04 PM
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#5
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Dr. Phil Group: Members Posts: 5,872 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
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QUOTE(Olympic 914 @ Jul 28 2020, 01:38 PM) QUOTE(DRPHIL914 @ Jul 28 2020, 12:59 PM) fan seems like it doesnt come on until about 220, i have a variable rheostat but thats the soonest so i might change this I used a 190 deg thermo switch inline before the cooler. On at 190 off at 175 (what ever temp you choose it goes off at 15 deg drop) https://www.pegasusautoracing.com/group.asp...ID=SETRABSWITCH great, thanks for the tip. |
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Posts in this topic
Olympic 914 Under Trunk Temp. Jul 15 2020, 07:00 AM
914Toy
So on the Oil Cooler thread the suggestion was ma... Jul 15 2020, 08:11 AM
914Toy
So on the Oil Cooler thread the suggestion was m... Jul 15 2020, 08:14 AM dirk2056 :trophy: Well done great work!! I would th... Jul 15 2020, 10:26 AM BeatNavy
:trophy: Well done great work!! I would t... Jul 15 2020, 12:49 PM Rand Sometimes an unexpected thread comes along that hi... Jul 15 2020, 01:03 PM GregAmy Ok, this morning wasn't unbearable heat, so he... Jul 26 2020, 07:54 AM GregAmy Test loop: my home is 5 minutes from I-91 in Middl... Jul 26 2020, 08:12 AM GregAmy Conclusions? Eh, I'm not gonna make any declar... Jul 26 2020, 08:42 AM BeatNavy This is good stuff. Thanks for posting. I just f... Jul 27 2020, 03:00 PM GregAmy I never got motivated to try it out later in the d... Jul 27 2020, 04:04 PM porschetub
I never got motivated to try it out later in the ... Jul 28 2020, 04:40 PM VaccaRabite My rear mounted Setrab double with fans kept the o... Jul 27 2020, 04:25 PM Craigers17 That's interesting data. Nice Work! One ... Jul 27 2020, 04:54 PM GregAmy
...try is removing your cooler duct and then repl... Jul 27 2020, 05:03 PM dakotaewing Just to add more fuel to the fire, I know there ar... Jul 27 2020, 07:18 PM JmuRiz Good info and confusing as always.
I never had is... Jul 27 2020, 08:52 PM 914sgofast2 Why not put a heat shield on top of the heat excha... Jul 27 2020, 09:00 PM GregAmy Tonight's tests, removing the duct. Probe is i... Jul 28 2020, 06:39 PM Olympic 914 :popcorn:
Jul 28 2020, 08:13 PM Craigers17 You win some ....you lose some....progress is neve... Jul 29 2020, 01:38 AM GregAmy but I'm guessing you're now trying to opti... Jul 29 2020, 06:25 AM BeatNavy Greg my duct work was a total bust as well. And I... Jul 29 2020, 04:52 AM |
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