 3.0 cooling option |
|
|
|
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. |
|
|
  |
| RKramden |
 Oct 19 2026, 09:50 AM
Post
#1
|
|
Member  Group: Members Posts: 51 Joined: 26-October 19 From: So. California Member No.: 23,589 Region Association: Southern California  |
I think I know the general response, but I’ll ask anyway.
Putting a 3.0 performance built (premium pump gas) into the 914. No intention of racing. Maybe an auto cross or track night, or terrorize the neighborhood, but mostly C&C and PCA events. No heat exchangers ( So.Cal), an oversized oil tank in the engine bay, and a 916-6 type engine lid. In lieu of a remote oil cooler I was considering changing the fresh air fan piping to blow back through the heater longs up through the tins and outlet right next to the engine cooling fan inlet space. Or possibly just blow on either side of motor below the tins. I’m wondering if this has ever been done successfully or if the idea makes any sense at all? Any thoughts or suggestions would be appreciated |
   |
 
|
| brant |
Oct 19 2026, 10:04 AM
Post
#2
|
|
914 Wizard Group: Members Posts: 12,281 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
|
The heater fan is really an insignificant amount of air
The -6 engine fan is likely 10x the amount of air already I don’t think it will help to any noticeable amount If the car/engine runs cool (low rpm) you may be fine without an aux cooler. If the oil runs warm you won’t. Some do. Usually depends on the amount of wear the motor already has or how it’s used-rpm |
|
|
|
| mepstein |
Oct 19 2026, 10:06 AM
Post
#3
|
|
914-6 GT in waiting Group: Members Posts: 20,939 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
|
The fresh air fan hardly moves any air in the cabin. It's not going to do anything to cool the engine.
Are you ever going to be going up a hill on a hot day? Stopped at a light for a while or stuck in a traffic jam on the road with the asphalt radiating heat up into the car. |
 |
|
| Superhawk996 |
Oct 19 2026, 12:32 PM
Post
#4
|
|
914 Guru Group: Members Posts: 8,138 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
|
(IMG:style_emoticons/default/agree.gif) both the above are correct
You cannot offset oil cooling with more air cooling. The primary reason being the heat transfer coefficient of air is (IMG:style_emoticons/default/stromberg.gif) compared to oil. Oil cooling is about 10x more efficient than air cooling. This is why the 911 engine has an oil cooler in the first place and why all the S performance variants ran an aux cooler in addition to the engine mounted oil cooler. Though the engine is called air cooled, it is heavily cooled by oil in addition to the cooling done by fan. |
|
|
|
|
4 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
2 Members: infraredcalvin, eradon
|
Lo-Fi Version | Time is now: 19th October 2026 - 02:34 PM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.