DS Pump

[Sandeep]

Yes the T1 pump is a Schadek 99$ USD, as mentioned by CLKWRK.

Its really a cool, compact little system ... pressure side has 32mm dia gears that are 21mm wide, scavenge side has 32mm dia gears that are 26mm long, so the ratio S/P is 1.238.

Oil path is as follows for a T4 application:

From the stock pickup location in the case -> scavenge gears -> out of pump -> remote oil thermostat -> remote oil cooler -> DS Tank, simple enough.

From the DS tank -> pressure gears -> transfer port in pump -> stock oil filter -> block of plate for stock oil cooler (block off plate is modified to let oil pass through as if a cooler was present) - > oil gallies.

This is how I am plumbing my system ... funny thing is the AN fittings/hose cost more than the pump/DS tank

I have a NOS T4 case sitting at home so I can take pics of the ports / case alignment. I'm using the stock T4 cam with rivets so I will have to take out my original T4 pump and take some measurements to get the T1 to fit.

Let me know what pics you need and I will post them here.

Sandeep

[Wally]

Thanks Sandeep; that CB price is very competitive indeed.

I am very curious how the pump fits (or doesn't) into the stock cam and how the intake port of the pump lines up to the case hole. I don't think you can fotograph the alignment, but your personal report is more then enough for me

So, thanks in advance,
Walter

[Sandeep]

I took some pictures last night but they came out blurry ... I will retake tonight.

The T4 case pickup tube diameter at the entrance to the pump is 12mm dia, and the 45 deg passage to the stock oil filter is 10mm dia.

On the pump, the intake to the scavenge side is 15mm dia and the output to the stock oil filter location is 12mm, so the pump has inlet/outlet bigger than the passages in the T4 case.

Due to this, the pump passages line up well with the case passages, if you really wanted to, you could try to open up the case passages to match the pump but I will not. In the pics you can fully see the case passage from the stock pickup tube location through the pump scavange hole (15mm dia) and when I stick a pencil in from the stock oil filter location, you can see it through the pump transfer port (12mm dia).

From measurements with the stock T4 pump, the body of the CB pump is roughly the same height at the drive boss, and it fit the case nicely without the drive tange .. remember, I am using a stock cam with rivets so I could measure no clearance issues.

To get the drive tange to engage the cam, I pressed the gears further onto the drive shaft with a vise and some sockets, about 3mm total, in effect making the drive tange shorter. I can turn over the engine with the starter (no coil wire attached !) and pump installed and when I pulled the pump, there is no contact with the cam rivets. I seem to have about 1mm clearance from the rivets to any location on the pump.

The only item I have to address is to machine about 3mm from the driveshaft that now sticks into the cover plate, essencially making the whole drive tange 3mm shorter. I did not want to touch the opposite side of the drive that engages the cam slot. I will press the gears off and do this on the weekend.

The pump clears the BAS header by about 13mm so no clearance issues ! and no issues with the pump input/output touching the case. If you have a rear engine hanger bar, you will not be able to fit this pump. I'm using a Cup brace so no issues. Not sure if this pump will fit in a 914.

So looks like I'm good to go with the installation. Just need to install the tank, wait for the fittings/hose to show up, plumb the system and we're on the road for a test. Good thing the weather here is still crappy Hope to be driving in early April.

Sandeep

[Wally]

Thanks for the excellent report Sandeep!
It sure looks like the way to go.

Greetings,
Walter

[CLKWRK]

hiya Sandeep,

i measured my dynosoar pump, pressure side is 32mm long x 32mm dia, and scavenger side is 64mm long x 32mm dia.

2:1 ratio, thats why i like this pump, the scavenger side is twice as big as the feed to the engine, that way i can use it to suck foamy hot oil out of my turbo, and foamy hot oil out of my sump plus whatever air it can find in there. Its big though and clearance is a problem.

I have a spare cb pump, if you want to check it out. I get my fittings at the parker hydraulics store, not sure how competitive their pricing is, but their products are top notch and they will make custom stainless braided hoses for hight heat applications (close to header).

bry

[Sandeep]

That pump is HUGE ! I'd really have to modify my BAS header to fit that puppy

I think for now the CB Pump will have to do. As soon as I get ready for the turbo, I will consider getting a turbo header built with enough clearance to fit a proper DS pump.

Thanks for the pic.

Sandeep

[Sandeep]

Finally have the bug on the road and thought I would give an update.

The CB DS pump has solved all of my oil starvation problems. I can brake HARD, corner HARD and accelerate HARD and the oil pressure hasn't dropped below 25psi.

I found an empty parking lot and performed some large loops doing about 30mph clockwise and counter clockwise .... NO pressure problems I will check the case oil level when I shut the car down and then check it again after it sits overnight to see if I need a shut of valve of some sort.

I have the Cup brace mounted and can peel the tires in first big time ! HA and no wheel hop ! .... its like driving a totally different car now ... one that I can enjoy and not worry about that #@$#@$ oil light. :agree:

I have to learn to shift that 5 speed ... I've grinded 3rd alot so far perhaps time to adjust the shift linkage.

Now to find a Drivers Education class !

Sandeep

[rip]

Originally Posted by CLKWRK

I have a spare cb pump, if you want to check it out. I get my fittings at the parker hydraulics store, not sure how competitive their pricing is, but their products are top notch and they will make custom stainless braided hoses for hight heat applications (close to header).

bry

If I can use it, ever think about selling it?


btw I understand how the regular two stage works but CB looks like they really pack in those gears, plus the routing must be tight to have the inlets and outlets the way they are.

Clkwrk or Sandeep got any pics with view of the routing?
thanks

Rip

[danielzink]

Winter is coming and I'm looking for a project to get myself in trouble with.........;D

I've been looking at a dry sump system for a while.

It sounds like we have to modify the CB pump just like the type oil pumps we put on our Type4 engines - no big deal.

I have a Ahnendorp rear hanger and LA Perf. jpipes and collector.
If you look at these 2 pictures - can you tell if the CB pump will clear ?







Also - what the overall depth of the CB pump housing ?



Thanks !

Dan