 Running cooler .., Anyone else do this ? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| jim_hoyland |
 Jul 31 2007, 09:50 PM
Post
#1
|
|
Get that VIN ?  Group: Members Posts: 9,311 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
 |
My summer engine temps have been running in the 210-220 range this summer, particularly in traffic conditions.
Removed the rain tray, the engine temps appear to have dropped 20 degrees. I'm running 180-200 now. Was curious if others have found the same Jim |
   |
 
|
  |
Replies(1 - 11)
| Dave_Darling |
Jul 31 2007, 10:59 PM
Post
#2
|
|
914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
|
Yup. Didn't help as much on my car.
Removing the engine lid can help a little more--that's part of the principle behind the GT engine lid. --DD |
|
|
|
| Jake Raby |
Aug 1 2007, 05:55 AM
Post
#3
|
|
Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Ummn, those aren't engine temps- they are oil temps...
Not one in the same! Oil temp is NOT engine temp! |
|
|
|
| SGB |
Aug 1 2007, 08:40 AM
Post
#4
|
|
just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
Does anyone know what volume of air the engine fan pushes? I guess it would be a relationship of RPM to CFM, and probably isn't linear. And then there is the volume of air inducted for combustion, too. I'm theorizing about car speed and ram-air, etc. just wondering what quantity of air would need to be pushed into the engine bay to surpass the low pressure induced by all that air flow out of there. Perhaps it is reasonable to try to increase air going in, but there is too much rain around here to remove the tray, so I'm wondering if it would be worht it to try to increase access of outside air to the engine bay some other way...
|
|
|
|
| toon1 |
Aug 1 2007, 09:45 AM
Post
#5
|
|
Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
QUOTE(jim_hoyland @ Jul 31 2007, 08:50 PM)  My summer engine temps have been running in the 210-220 range this summer, particularly in traffic conditions. Removed the rain tray, the engine temps appear to have dropped 20 degrees. I'm running 180-200 now. Was curious if others have found the same Jim QUOTE(SGB @ Aug 1 2007, 07:40 AM) Does anyone know what volume of air the engine fan pushes? I guess it would be a relationship of RPM to CFM, and probably isn't linear. And then there is the volume of air inducted for combustion, too. I'm theorizing about car speed and ram-air, etc. just wondering what quantity of air would need to be pushed into the engine bay to surpass the low pressure induced by all that air flow out of there. Perhaps it is reasonable to try to increase air going in, but there is too much rain around here to remove the tray, so I'm wondering if it would be worht it to try to increase access of outside air to the engine bay some other way... IF those are oil temps., according to Jake's radio show they are normal. Below 180 is getting too low and 220 is getting a bit on the high side but still ok. Oil temps. and CHT are two seperate things and for the most part DO NOT correlate. I would also interested to know how much air flow the engine bay would need to create a positive or equal pressure. |
|
|
|
| So.Cal.914 |
Aug 1 2007, 09:50 AM
Post
#6
|
|
"...And it has a front trunk too." Group: Members Posts: 6,588 Joined: 15-February 04 From: Low Desert, CA./ Hills of N.J. Member No.: 1,658 Region Association: None |
QUOTE(SGB @ Aug 1 2007, 07:40 AM) Does anyone know what volume of air the engine fan pushes? I guess it would be a relationship of RPM to CFM, and probably isn't linear. And then there is the volume of air inducted for combustion, too. I'm theorizing about car speed and ram-air, etc. just wondering what quantity of air would need to be pushed into the engine bay to surpass the low pressure induced by all that air flow out of there. Perhaps it is reasonable to try to increase air going in, but there is too much rain around here to remove the tray, so I'm wondering if it would be worht it to try to increase access of outside air to the engine bay some other way... If you don't want to remove it, drill big holes in the bottom for more air. (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/huh.gif) |
|
|
|
| IronHillRestorations |
Aug 1 2007, 09:57 AM
Post
#7
|
|
I. I. R. C. Group: Members Posts: 6,724 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None
|
Regardless of where and what the temp is measured from, I think the point is that he saw lower temps by pulling the rain tray.
Jim, you might think about getting a second engine lid and making a double grill "GT" engine lid. The best one I've seen was disassembled (cut spot welds), and then the solid panel was cut out leaving about a 1/2" perimeter. Then a second engine grill was flattened and welded to the back side of the cut out panel. Much smoother looking IMHO. If I can pull it out of the rafters I'll take a pic. With a double engine grill or no rain tray, you'll need a 914 Umbrella Cover to keep the rain out though! (IMG:style_emoticons/default/biggrin.gif) (I'm thinking Jim has one though) |
|
|
|
| Allan |
Aug 1 2007, 10:24 AM
Post
#8
|
|
Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
I run a gt style grill on my /6 and oil temp dropped from around 220 to 205-210.
|
|
|
|
| ConeDodger |
Aug 1 2007, 02:24 PM
Post
#9
|
|
Apex killer! Group: Members Posts: 23,602 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California
|
QUOTE(Headrage @ Aug 1 2007, 09:24 AM) I run a gt style grill on my /6 and oil temp dropped from around 220 to 205-210. Allan isn't mentioning that he lives in Bakersfield. It is hot as hell at ambient. The GT lid must be pretty effective to drop oil temp by 10-15 degrees. The other secret that shouldn't be a secret with these cars is to keep your revs up. You can't just drop an air cooled motor into 5th gear and lug along... |
|
|
|
| dbu356 |
Aug 1 2007, 03:28 PM
Post
#10
|
|
Member Group: Members Posts: 120 Joined: 2-May 04 From: Scottsdale, AZ Member No.: 2,013 |
"Does anyone know what volume of air the engine fan pushes?"
According to the "Technical Specifications" book... Delivery rate Approx. 800 l/sec at 4600rpm |
|
|
|
| Demick |
Aug 1 2007, 03:46 PM
Post
#11
|
|
Ernie made me do it! Group: Benefactors Posts: 2,312 Joined: 6-February 03 From: Pleasanton, CA Member No.: 257  |
QUOTE(dbu356 @ Aug 1 2007, 02:28 PM) Delivery rate Approx. 800 l/sec at 4600rpm That's about 1700 CFM (cubic feet per minute) for those of us that live in the States. BTW, I notice no engine oil temperature difference when I switch between my standard engine lid with rain tray, and my GT style lid (no rain trays obviously). Demick |
|
|
|
| jim_hoyland |
Aug 1 2007, 06:59 PM
Post
#12
|
|
Get that VIN ? Group: Members Posts: 9,311 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
|
QUOTE(9146986 @ Aug 1 2007, 08:57 AM) Regardless of where and what the temp is measured from, I think the point is that he saw lower temps by pulling the rain tray. Jim, you might think about getting a second engine lid and making a double grill "GT" engine lid. The best one I've seen was disassembled (cut spot welds), and then the solid panel was cut out leaving about a 1/2" perimeter. Then a second engine grill was flattened and welded to the back side of the cut out panel. Much smoother looking IMHO. If I can pull it out of the rafters I'll take a pic. With a double engine grill or no rain tray, you'll need a 914 Umbrella Cover to keep the rain out though! (IMG:style_emoticons/default/biggrin.gif) (I'm thinking Jim has one though) Have a GT lid and will compare next week. Reason I removed the rain tray was I could reach the shelf the GTG lid is stored, so I did the next best thing. Not a lot of rain in So Cal. Interesting remarks, thanks for the comments. Jim |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 28th May 2024 - 01:46 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.