Cup electric PS pump conversion
#1
Drifting
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Making notes for those who might tackle this in the future. Thanks to Top@TPC for answering a bunch of my questions.
here's the pump.
![Name: 8k58BPB.jpg
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the plan was to model, prototype, then machine a mount of of 6061. here's the initial mounting plate based off of Tom's install:
![Name: ZDqqZI9.png
Views: 164
Size: 432.0 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352635d1683259317-cup-electric-ps-pump-conversion-zdqqzi9.png)
after I slept on this, I revisited. I could just machine 3 ribs and weld them to a base plate. no need for the circular mount.
![Name: xDXS9lR.png
Views: 164
Size: 8.6 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352636d1683259317-cup-electric-ps-pump-conversion-xdxs9lr.png)
here's the designed I settled on. a rib with a pilot hole drilled on the face and a larger countersunk hole on the back
![Name: j5np5xS.png
Views: 158
Size: 197.5 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352637d1683259317-cup-electric-ps-pump-conversion-j5np5xs.png)
moving to the prototype phase i removed a bunch of material to speed up the 3d printing process. this resulted in about 3 hours of time saved. the test fit was perfect. a little too perfect. need to expand all holes by 0.5mm
![Name: 5DRqHBn.jpg
Views: 164
Size: 325.0 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352638d1683259317-cup-electric-ps-pump-conversion-5drqhbn.jpg)
here's the pump.
![Name: 8k58BPB.jpg
Views: 162
Size: 369.6 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352634d1683259317-cup-electric-ps-pump-conversion-8k58bpb.jpg)
the plan was to model, prototype, then machine a mount of of 6061. here's the initial mounting plate based off of Tom's install:
![Name: ZDqqZI9.png
Views: 164
Size: 432.0 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352635d1683259317-cup-electric-ps-pump-conversion-zdqqzi9.png)
after I slept on this, I revisited. I could just machine 3 ribs and weld them to a base plate. no need for the circular mount.
![Name: xDXS9lR.png
Views: 164
Size: 8.6 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352636d1683259317-cup-electric-ps-pump-conversion-xdxs9lr.png)
here's the designed I settled on. a rib with a pilot hole drilled on the face and a larger countersunk hole on the back
![Name: j5np5xS.png
Views: 158
Size: 197.5 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352637d1683259317-cup-electric-ps-pump-conversion-j5np5xs.png)
moving to the prototype phase i removed a bunch of material to speed up the 3d printing process. this resulted in about 3 hours of time saved. the test fit was perfect. a little too perfect. need to expand all holes by 0.5mm
![Name: 5DRqHBn.jpg
Views: 164
Size: 325.0 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352638d1683259317-cup-electric-ps-pump-conversion-5drqhbn.jpg)
![Name: UPSJiYR.jpg
Views: 169
Size: 357.0 KB](https://rennlist.com/forums/attachments/997-gt2-gt3-forum/1352639d1683259317-cup-electric-ps-pump-conversion-upsjiyr.jpg)
#5
Rennlist Member
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Remove the load on the engine due to the PS Pump
Simplicity due to removing all the lines that require a motor drop if there is an issue with one
More importantly, get rid of the fire hazard the Pentosin is at the rear of the motor.
Ngng - my shop has done a bunch of these, they fab the lines/connections. They mount the pumps for street cars up next to the battery and run everything super tight and neat. Requires a hole for the cap of the reservoir cut in the batter panel, but otherwise it’s super flush and clean, and allows use of the trunk.
I probably do this at some point...
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frederickcook87 (06-12-2022)
#6
Rennlist Member
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Originally Posted by Spyerx
Ngng - my shop has done a bunch of these, they fab the lines/connections. They mount the pumps for street cars up next to the battery and run everything super tight and neat. Requires a hole for the cap of the reservoir cut in the batter panel, but otherwise itÂ’s super flush and clean, and allows use of the trunk.
I probably do this at some point...
I probably do this at some point...
Last edited by bmwtye; 10-16-2017 at 05:49 PM.
#7
Drifting
Thread Starter
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#8
Drifting
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Possibly a reduction in weight
Remove the load on the engine due to the PS Pump
Simplicity due to removing all the lines that require a motor drop if there is an issue with one
More importantly, get rid of the fire hazard the Pentosin is at the rear of the motor.
Ngng - my shop has done a bunch of these, they fab the lines/connections. They mount the pumps for street cars up next to the battery and run everything super tight and neat. Requires a hole for the cap of the reservoir cut in the batter panel, but otherwise it’s super flush and clean, and allows use of the trunk.
I probably do this at some point...
Remove the load on the engine due to the PS Pump
Simplicity due to removing all the lines that require a motor drop if there is an issue with one
More importantly, get rid of the fire hazard the Pentosin is at the rear of the motor.
Ngng - my shop has done a bunch of these, they fab the lines/connections. They mount the pumps for street cars up next to the battery and run everything super tight and neat. Requires a hole for the cap of the reservoir cut in the batter panel, but otherwise it’s super flush and clean, and allows use of the trunk.
I probably do this at some point...
who is your shop! IIRC bmwtye is planning on mounting up top too. where do they run the lines? I was planning on DIY and making the models/parts list avail for others
can you PM me, curious what you are thinking
#10
Rennlist Member
#11
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I got the rebel rsr unions for the rack.
if mounting the pump up high next to the battery, I guess you don't have room for the additional expansion bottle.? Or if you do it won't be higher...so it won't drain back.?
if mounting the pump up high next to the battery, I guess you don't have room for the additional expansion bottle.? Or if you do it won't be higher...so it won't drain back.?
#12
Drifting
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#13
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Here are the O-ring part numbers:
999-230-542-40
999-230-543-40
Here is the basic wiring:
red (with inline 80amp fuse) - battery +12V
brown - ground
black - ignition +12V (i.e., only runs when key is on)
blue/white - alternator dash light (to turn it off if the key is on but car not running)
brown/white - not required (for diagnostics)
For the Blue/White wires there's no alternator dash light on a 997 street car being almost everything is on the CAN bus. Some people tap this wire into ABS, but I wouldn't touch the ABS. Its easier just to connect the Blue/White + Black to ignition on.
999-230-542-40
999-230-543-40
Here is the basic wiring:
red (with inline 80amp fuse) - battery +12V
brown - ground
black - ignition +12V (i.e., only runs when key is on)
blue/white - alternator dash light (to turn it off if the key is on but car not running)
brown/white - not required (for diagnostics)
For the Blue/White wires there's no alternator dash light on a 997 street car being almost everything is on the CAN bus. Some people tap this wire into ABS, but I wouldn't touch the ABS. Its easier just to connect the Blue/White + Black to ignition on.
#14
Drifting
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Here are the O-ring part numbers:
999-230-542-40
999-230-543-40
Here is the basic wiring:
red (with inline 80amp fuse) - battery +12V
brown - ground
black - ignition +12V (i.e., only runs when key is on)
blue/white - alternator dash light (to turn it off if the key is on but car not running)
brown/white - not required (for diagnostics)
For the Blue/White wires there's no alternator dash light on a 997 street car being almost everything is on the CAN bus. Some people tap this wire into ABS, but I wouldn't touch the ABS. Its easier just to connect the Blue/White + Black to ignition on.
999-230-542-40
999-230-543-40
Here is the basic wiring:
red (with inline 80amp fuse) - battery +12V
brown - ground
black - ignition +12V (i.e., only runs when key is on)
blue/white - alternator dash light (to turn it off if the key is on but car not running)
brown/white - not required (for diagnostics)
For the Blue/White wires there's no alternator dash light on a 997 street car being almost everything is on the CAN bus. Some people tap this wire into ABS, but I wouldn't touch the ABS. Its easier just to connect the Blue/White + Black to ignition on.
I am open to suggestions for wiring. Apparently there is a fused power source on the passenger side. I need to confirm.
Does the pump come with a built in relay? Can I just run fused 12V off the battery then the blue/white to a switched 12V (I've already got one run into the trunk). If so, this is even easier... My original plan was to run two SPDT relays (45A ea) to feed the red power cable with my switched 12v signal.
#15
Rennlist Member
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Sweet, thanks. my cables were cut, so this is helpful.
I am open to suggestions for wiring. Apparently there is a fused power source on the passenger side. I need to confirm.
Does the pump come with a built in relay? Can I just run fused 12V off the battery then the blue/white to a switched 12V (I've already got one run into the trunk). If so, this is even easier... My original plan was to run two SPDT relays (45A ea) to feed the red power cable with my switched 12v signal.
I am open to suggestions for wiring. Apparently there is a fused power source on the passenger side. I need to confirm.
Does the pump come with a built in relay? Can I just run fused 12V off the battery then the blue/white to a switched 12V (I've already got one run into the trunk). If so, this is even easier... My original plan was to run two SPDT relays (45A ea) to feed the red power cable with my switched 12v signal.
![](https://cimg4.ibsrv.net/gimg/rennlist.com-vbulletin/620x610/screen_shot_2017_10_16_at_8_21_48_pm_81971fc975c458d095c4bdef328571a165f9caee.png)