 More transmission cooling Questions..., "spraying" the gears "overkill"??? |
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| Mueller |
 Jul 26 2005, 01:40 PM
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#1
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914 Freak!  Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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Seems to be a benifit to cooling the transmission fluid, at what point does adding spray bars to the case to supply additional cooling/lubrication happen?
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| davep |
Jul 26 2005, 01:53 PM
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#2
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914 Historian Group: Benefactors Posts: 5,143 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
I have it on reliable authority that the tranny is good for up to six hours attached to a 906 engine. After that the bearings in the intermediate plate get cooked. This is due to the reversed layout of the tranny compared to the 911 for which it was designed. Apparently a modification to the intermediate plate to facilitate lubrication of the bearings works well.
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| john rogers |
Jul 26 2005, 02:00 PM
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#3
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
Well, several of the vintage 2L race cars had transmission problems, usually with the ring and pinion from what I remember. When they added the pump + cooler + returns to the top of the case the failures went away. That's why I added the system to mine. Since I did not have the temp sender installed before adding the cooler I don't know what the temps ran, but afterward they never get above 220 degrees F. At the race in Tecate I was shifting into 1st at about 20MPH twice a lap and temps stayed under 220. I'd say it is much cheaper than transmission work in the long run.
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| redshift |
Jul 26 2005, 02:06 PM
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#4
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
That's what the 916 mods are, right? It's a drive, pump, and squirters for the R&P?
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| mihai914 |
Jul 26 2005, 02:17 PM
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#5
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Senior Member Group: Members Posts: 800 Joined: 2-March 05 From: Montreal, QC Member No.: 3,697 Region Association: None
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Lemme go check on my 916! Nope the 916 kit is to convert and hang the 915 transmission (an end cover, shift thingy and some other things (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) )
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| scotty914 |
Jul 26 2005, 03:28 PM
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#6
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suby torque rules Group: Members Posts: 1,525 Joined: 20-July 03 From: maryland, the land of 25 year Member No.: 924 |
i would think spraying the bearings would be the best bet to make sure they stay cool. the gears pretty much are spraying them selves. also doing the R+P would not be a bad idea due to the amount of stress there.
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| Aaron Cox |
Jul 26 2005, 03:33 PM
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#7
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
miles is half way correct -
there were 2 types of 916 transmissions...(im told) some had integral pumps and spraybars, while the rest did not. basically a 915 converted for mid engine usage..... the race ones were more intircate |
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