 Dry sump pump in a 914-4, Questions on how to and best methods |
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| betegh9 |
 Jan 15 2008, 08:50 PM
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#1
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Newbie  Group: Members Posts: 11 Joined: 27-September 07 From: Blue Bell, Pa. Member No.: 8,165  |
I am looking for an answer to engine oiling for the 914 motor. AX and track events with high revs starve the bearings of oil, so I was wondering if anyone here has done a dry sup system that worked similar to a 911 motor.
CB Performance sells a 2 stage system that may work if the crank pulley is changed, but I am not sure if this pump, when the engine is stopped, would keep the oil from the tank to seep into the engine. Any information would help, thanks. |
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| Al Meredith |
Jan 15 2008, 09:01 PM
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#2
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Senior Member Group: Members Posts: 960 Joined: 4-November 04 From: Atlanta, ga Member No.: 3,061 |
I think the old Formula Super V (Type IV) used a dry sump system. We bought a three stage pump at a PAP auction once that mounted external to the engine in the stock location. Would not fit with the fan shroud in place. I guess the VSV had slip stream cooling and no shroud.
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| McMark |
Jan 16 2008, 12:10 AM
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#3
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
A dry sump pump in the stock location with a stock fan housing doesn't work. The pump sticks out too far. You could get a belt driven pump and mount it like the air pump on 76 models.
Short answer, it ain't easy. Do it. We'll all help, and we'll all learn in the process. |
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| Dave_Darling |
Jan 16 2008, 02:59 AM
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#4
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Doesn't Raby or Racer Chris have one dry-sump setup that does fit with the stock shroud? I am pretty sure I read something about that here or on the Shoptalkforums BBS...
--DD |
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| lotus_65 |
Jan 16 2008, 07:37 AM
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#5
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Senior Member Group: Members Posts: 1,608 Joined: 21-March 05 From: minneapolis, mn Member No.: 3,795 Region Association: Northstar Region |
this car on e-bay says it has a dry-sump setup on it's 4.
i wonder if you wrote him and asked for some details... paul |
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| HAM Inc |
Jan 16 2008, 08:32 AM
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#6
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
We use the CB pump on our F-Prod car. It does fit behind the stock fan shroud, but the front engine mounts have to be replaced with a custom piece. We also use a ball valve at the sump tank to keep the crankcase from filling when the engine isn't running.
The CB pump needs some minor mods to accomodate the pipe fittings. For some reason CB didn't machine the threads far enough. It's not a big deal. Just get a pipe tap and the pipe nipples you plan to use then tap until the nipples fit properly. The pump doesn't have enough ass to deal with compliance (no pump likes compliance anyway), so you will have to use braided lines. |
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| Dave_Darling |
Jan 16 2008, 09:46 AM
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#7
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Ah, thanks Len! Sorry to forget that it was you who was the one running it.
--DD |
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| ConeDodger |
Jan 16 2008, 10:08 AM
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#8
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Apex killer! Group: Members Posts: 23,587 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California
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Much of the prior discussion I have seen on this has focused on if this is necessary...
I recall most felt a half quart overfill and a tuna can were all that was needed. I think Jake has actually recommended Accusump? |
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| Jake Raby |
Jan 16 2008, 12:03 PM
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#9
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
The CB pumps have issues out of the box when fitted to the Type 4 engine, especially with certain camshafts.. The CB pump is made for the Type 1 and it takes an hour of work to make it match the oil passages of a Type 4 and fit correctly in the case.
Cam interference and mis matched oil passages are a guarantee if installing one out of the box. |
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