 3.0 cooling option |
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| RKramden |
 Oct 19 2026, 09:50 AM
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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 |
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| Superhawk996 |
Oct 19 2026, 12:32 PM
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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 
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(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. |
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Posts in this topic
RKramden 3.0 cooling option Oct 19 2026, 09:50 AM
brant The heater fan is really an insignificant amount o... Oct 19 2026, 10:04 AM mepstein The fresh air fan hardly moves any air in the cabi... Oct 19 2026, 10:06 AM
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