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Hi , as in the title , what happens to the oil pump when running a dry sump system ? I guess its blocked off in some way but does anyone have a picture to show how this is done please .
Simply disassemble the oil pump and remove the rotors.
wouldn't that leave a wide open passage from the pressurized oil feed on the side of the block, back through the "pump", through the girdle to the original pickup point in the sump? just blowing oil into the pan?
Thank you for the reply's and great build Mr Penguin .
I have to echo what V2 says in , will this not just blow oil back into the sump ?
As I am a cheapskate , I modified my oil pan as detailed by MM in an earlier post as in the picture and have had the pump/alternator bracket water cut from some 15mm aluminium . Not as pritty but should work .
A couple further questions , what size or ratio sprockets are you using ?
And I guess its ok to tee into the oil out line for a mechanical pressure gauge .
I don't know all the details of the sprocket sizes & my understanding is that a pressure line from the pump is via the oil filter and/or cooler delivers oil under pressure to the oil gallery.
My Peterson 3 gallon tank is located in the rear wheel well & I've an air/oil separator which has separate scavenge oil and scavenge air return lines to the tank.
I've a custom crank pulley designed & machined so as to run the power steering pump, alternator & oil pumps at the correct speeds.
Finding a suitable alternator to package with the much bigger intercooler (SFR Stage 2), radiator, (Wizard alloy), twin fans & oil cooler (Setrab 34 row x 405mm) was an expensive & time consuming business.
We've also got extended ARE oil pan pick-ups because when the pan was designed allowance wasn't made for the approx 30 degree angle of cant on the engine.
I've an oil temp & pressure sensor in the remote oil filter housing (sandwich block) which sends data to the ECU (Emtron KV8) which will display it on a Plex Micro SDM Pro display in the space for the cubby in the lower dash.
I'm running CDI ignition with Emtron CDI4 & Emtron coils with sequential ignition & injection.
Spencer and Sherry66,
There is no connection between the stock oil pump pressure path and the oil galley in the 944 block. The passages only join in the oil filter console, which is not used with a dry sump. A plate replaces the filter console which blocks off the original pump pressure path and provides an inlet (from the dry sump pressure section) to the block.
Sherry66,
I'm afraid you will see a failure with the oil pan baffle you built. Your welds will likely crack since you have nothing supporting the large convex area on the baffle, Take another look on the photo I posted and note the gentle radius on the flange bends for the 3 bolt mount, and note the additional bolt in the large convex area. Both are very important features.
Obvious it will crack on the weld now you point it out Michael . I welded it as I have no metal bending press but I do know someone who has. Glad I posted the picture up now .
Well I took it to my mate who had the sheet metal folder and he came up with this .....
Ok the last line was a lie .
I had a rethink on how important the oil flow is on a 944 turbo and spoke to Jan of DRS . He has had these made from a solid billet lump with the pick ups in the right place and the right angles . If I remember correctly he said he had 8 made and had 4 left so I grabbed this one to stop any worries about my sheet metal bending skills . Got to say its very , very nice .
I believe the revline racing 944 were running the same pan on their 968 .
Someone's got to say something negative and its me!! haha
That looks like a real professional piece. The only thing that would be an improvement would be to put small external bumps where the threaded hole is going through the bottom of the pan so that there is no leak path whatsoever. I like the ORB ports for the fitting adaptors. Super professional looking.
02-08-2022, 01:15 PM
What happens to oil Pump with dry sump
