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#1
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my scientific tranny temp study
ok, so i removed my belly pan today and replaced the insulation (aluminum-backed foam tape) around my temp sender. tranny cooler is TCI brand. the temp sender is incorporated into a Permacool external filter, which is mounted to the panel below the battery. the gauge used is a Nordskog digital. outside temps used were taken from the outside temp display on the climate control head. air conditioning on both days. i was keeping notes on the tranny temps driving to work yesterday and today (3:30PM, heavy stop-n-go traffic, several hills). here's the results:
YESTERDAY - undertray on, no insultion on temp sender outside temp: 83degF max tranny temp: 212degF average cruising temp: 195-ish TODAY - undertray removed, insulated temp sender outside temp: 82degF max tranny temp: 189degF average cruising temp: 175-ish TONIGHT - " " (return home - same route, less traffic, no AC) outside temp: 64degF max tranny temp: 177degF average cruising temp: 170-ish the temp gets scrubbed off much quicker without the undertray as well. cools down noticeably quicker on a flat or downhill stretch of road. now i'm off to conduct a study on the reaction of beer and nachos in my stomach. Alan (Mr. Science) Last edited by Landshark; 04-30-2004 at 11:13 PM. |
#2
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I've seen similar temp drops with the belly pan removed. It seems like its a good idea to remove it in the summer months. I wonder how it allows more effective cooling.
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#3
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I'd remove the belly pan, but I'm sort of paranoid about something flying up and denting or breaking my oil pan, or causing a coolant line to pop off. I do live in an area where driving in gravel is somewhat of a common occurence.
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#4
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Quote:
Unless you are planning to do some serious off roading. I keep mine off all summer and have not had any problems.
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Mike 92 LSL Teal 103k 00 RS 2.5 Silverthorn Metallic 36k 68 Chevy Camaro 07 Forester XT Sport |
#5
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Must do test.
Alan how about doing another test, to compare the temps that occure using Drive for one, and another run using 3rd, to see if there is a difference in temps.
Same conditions. just 4th vers 3rd. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#6
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When you say belly pan do you mean the partial shroud that starts under the radiator? Are you friggin' kiddin' me? This simple 'mod' can lower the tranny temp by 20 degrees? If so, this should be the #1 mod of all time. Are there any drawbacks?
Last edited by Snickers; 05-01-2004 at 09:31 PM. |
#7
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I also would like to know where the belly pan is exactly...
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"Wise men talk because they have something to say; fools, because they have to say something." - Plato 2013 Cosmic Blue 5spd Evo X GSR 2006 Galaxy Gray 6MT RX-8 (sold) 2006 Steel Gray WRX TR (sold) 1996 Brilliant Red SVX L (sold) |
#8
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The belly pan is the big plastic thing under the front of the car.
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Matt Locker Link 2015 BRZ Limited 6MT 92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting 92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles 19 Subaru Ascent Premium - -Hers !. 89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P. |
#9
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I removed my belly pan back when I had the auto, and it lowered tranny temps by about 20 degrees. It did, though, significantly increase the amount of road 'dust' that got into the engine bay. I found myself having to dust the engine bay and re-apply protectant to all of the black stuff once a week to keep it looking nice under there.
Mike |
#10
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My belly pan "fell off" about 6 months ago. I use quotes because it was really taken off by breaking the bolts by a dealership, but I didn't notice for a little while. When I asked them about it they said it must have fell off.
Anyway, back to the topic at hand, I have driven the car like this for some time. It has even been in snows over 1 foot with no problem. I don't plan on replacing it anytime soon.
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Collin 1995 L AWD Locker 1987 Porsche 944 turbo 80k miles. MBC + Chips. Relatively Stock |
#11
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Alan (Mr. Science)
I was wondering what the effect would be in insulating the temp sender. If that is giving you a different reading than if it was not put on. That is something to consider. If it was on at the start of the experiment, it would show what happened when everything is the same. Maybe take the tape off (insulation) and see what happens. Does it increase the temp reading, or stay the same.
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. Earl .... ... .... ><SVX(*> Subaru Ambassador [COLOR=”silver”]1992 Tri Color L[/COLOR] ~45K (06/91) #2430 1992 Dark Teal LS-L ~184K (05/91) #0739 1992 Claret LS-L ~196K (05/91) #0831 1992 Pearl LS-L ~103K (06/91) #1680 1992 Pearl LS-L ~151K (06/91) #2229 1992 Dark Teal LS ~150K (07/91) #3098 (parts car) 1992 White LS-L ~139K (08/92) #6913 1993 25th AE ~98K (02/93) #164 1993 25th AE ~58K (02/93) #176 1993 25th AE ~107K (02/93) #215 1993 25th AE ~162K (02/93) #223 1994 Laguna Blue Pearl LSi ~124K (1/94) #2408 1994 Laguna Blue Pearl LSi ~144K (10/93) #1484 1994 Laguna Blue Pearl LSi ~68K (10/93) #1525 1994 Barcelona Red LSi ~46K (02/94) #2624 1994 Pearl LSi ~41K (12/93) #1961 1995 Bordeaux Pearl LSi ~70K (02/95) #855 1996 Polo Green LSi ~95K (03/96) #872 1997 Bordeaux Pearl LSi ~55K (08/96) #097 2003 Brilliant Red LS1 Convertible ~29K (04/03) #8951 1999 Magnetic Red LS1 Coupe ~33K (04/99) #6420 My Email | Old Locker | New Locker | Picture of 15 of the 19 |
#12
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Re: Must do test.
Quote:
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Alan 1987 928 S4 (Black) SOLD! 1997 SVX LSi (Ebony) SOLD! 2005 Legacy GT (Silver) [Cobb Stg 2+] SOLD! 1987 928 S4 (Black) SOLD! 2005 Forester XT Premium (Crystal Gray Metallic) SOLD! 2008 Lancer Evolution X MR (Apex Silver) [Cobb Stg 1+] 2015 Outlander Sport 2.4GT AWD (Mercury Gray) 2013 G37xS (Obsidian Black) |
#13
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Quote:
the bottom line is, no bellypan (and an insulated sender, if you have a gauge) will result in lower temps and more accurate readings on your gauge.
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Alan 1987 928 S4 (Black) SOLD! 1997 SVX LSi (Ebony) SOLD! 2005 Legacy GT (Silver) [Cobb Stg 2+] SOLD! 1987 928 S4 (Black) SOLD! 2005 Forester XT Premium (Crystal Gray Metallic) SOLD! 2008 Lancer Evolution X MR (Apex Silver) [Cobb Stg 1+] 2015 Outlander Sport 2.4GT AWD (Mercury Gray) 2013 G37xS (Obsidian Black) |
#14
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Why would the insulated sender give you lower temps? Or would it just give you a reading that is more true than without?
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. Earl .... ... .... ><SVX(*> Subaru Ambassador [COLOR=”silver”]1992 Tri Color L[/COLOR] ~45K (06/91) #2430 1992 Dark Teal LS-L ~184K (05/91) #0739 1992 Claret LS-L ~196K (05/91) #0831 1992 Pearl LS-L ~103K (06/91) #1680 1992 Pearl LS-L ~151K (06/91) #2229 1992 Dark Teal LS ~150K (07/91) #3098 (parts car) 1992 White LS-L ~139K (08/92) #6913 1993 25th AE ~98K (02/93) #164 1993 25th AE ~58K (02/93) #176 1993 25th AE ~107K (02/93) #215 1993 25th AE ~162K (02/93) #223 1994 Laguna Blue Pearl LSi ~124K (1/94) #2408 1994 Laguna Blue Pearl LSi ~144K (10/93) #1484 1994 Laguna Blue Pearl LSi ~68K (10/93) #1525 1994 Barcelona Red LSi ~46K (02/94) #2624 1994 Pearl LSi ~41K (12/93) #1961 1995 Bordeaux Pearl LSi ~70K (02/95) #855 1996 Polo Green LSi ~95K (03/96) #872 1997 Bordeaux Pearl LSi ~55K (08/96) #097 2003 Brilliant Red LS1 Convertible ~29K (04/03) #8951 1999 Magnetic Red LS1 Coupe ~33K (04/99) #6420 My Email | Old Locker | New Locker | Picture of 15 of the 19 |
#15
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Quote:
__________________
Alan 1987 928 S4 (Black) SOLD! 1997 SVX LSi (Ebony) SOLD! 2005 Legacy GT (Silver) [Cobb Stg 2+] SOLD! 1987 928 S4 (Black) SOLD! 2005 Forester XT Premium (Crystal Gray Metallic) SOLD! 2008 Lancer Evolution X MR (Apex Silver) [Cobb Stg 1+] 2015 Outlander Sport 2.4GT AWD (Mercury Gray) 2013 G37xS (Obsidian Black) |
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