Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 Engine Rebuilding Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered
 
tadd's Avatar
 
Join Date: Dec 2005
Location: Mount Airy, MD
Posts: 4,299
GT3 oil pump questions

So I dug into my GT3 pump on a whim... Unfortunally I found this on the primary scavenge side... . The damage is limited to only one of the gears and the one housing. Everything other stage looks awesome.

So questions:
1. Since the scores are radial, do I sandpaper the peaks and live with it? Is a bit of file love on the gear teeth in need as well?
2. Are the housings for all the big pumps interchangeable? Anybody got damage on the other end and want to sell the parts ?
3. What goes into 'flowing' a pump? It looks darn good in there. Its my understanding that the sharp transition between the curved walls and the oil flow path is required and those should not be radiused. Is this true?

t




__________________
1967 912 with centerlocks… 10 years and still in pieces!
Old 03-09-2011, 06:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered
 
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
Tadd,

You're gonna hate me for saying this, but I would not install that pump in any engine that will see north of 7K RPM.

I don't know anyone with an "oil pump dyno", to confirm scavenge and pressure performance and Porsche doesn't provide any specs, either.

The housings are unique for each model of pump and are not interchangeble.

Given the cost of these things, I'm sure you'll get other diverging opinions however, given whats at stake, I would not use that in anything we do here.
__________________
Steve Weiner
Rennsport Systems
Portland Oregon
(503) 244-0990
porsche@rennsportsystems.com
www.rennsportsystems.com
Old 03-09-2011, 09:10 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered
 
tadd's Avatar
 
Join Date: Dec 2005
Location: Mount Airy, MD
Posts: 4,299
Steve:
It figures . Luck(!) the price was very good... unfortuanlly I owe kenik money and cant take him behind the woodshed .

If I find a good 'tail cone' from another GT3 pump that say, got lunched in the pressure section... could I just make the 'bolt in' swap or is there some sort of tolerance 'hand fitting' that is required?

...Or am I just shopping for a new pump and have a pile of parts on hand?

t
__________________
1967 912 with centerlocks… 10 years and still in pieces!
Old 03-09-2011, 10:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered
 
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
Quote:
Originally Posted by tadd View Post
Steve:
It figures . Luck(!) the price was very good... unfortuanlly I owe kenik money and cant take him behind the woodshed .
LOL,......You get what you pay for,...

Quote:
If I find a good 'tail cone' from another GT3 pump that say, got lunched in the pressure section... could I just make the 'bolt in' swap or is there some sort of tolerance 'hand fitting' that is required?

...Or am I just shopping for a new pump and have a pile of parts on hand?

t
If you can find a housing thats not all scored, you'll be just fine. I'm very careful about assembly and test them to ensure they are not binding.
__________________
Steve Weiner
Rennsport Systems
Portland Oregon
(503) 244-0990
porsche@rennsportsystems.com
www.rennsportsystems.com
Old 03-09-2011, 03:21 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered
 
Join Date: Feb 2005
Location: California
Posts: 724
Are gears in the GT3 pump supposed to have those notches in
them? They look uniform but I've not seen them before on earlier
pumps.

andy
Old 03-09-2011, 03:39 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Max Sluiter
 
Flieger's Avatar
 
Join Date: Mar 2006
Location: So Cal
Posts: 19,644
Garage
I thought they were the other half of those circumferential housing scores- looks like the oil pump ate some hard grit.
__________________
1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
Old 03-09-2011, 03:45 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered
 
tadd's Avatar
 
Join Date: Dec 2005
Location: Mount Airy, MD
Posts: 4,299
Big win for Flieger. Notches in the gear should not be there.

t
__________________
1967 912 with centerlocks… 10 years and still in pieces!
Old 03-09-2011, 05:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered
 
MBEngineering's Avatar
 
Join Date: Jan 2005
Location: KENDAL,CUMBRIA, UK
Posts: 1,580
HI Tadd
I still have the oil pump from the NUT in the pump, some photo's for you, the marks are marks/light scratches, also the gears, if any good, have been using the pump case as a dummy for engine building, if you think you could use it drop me a PM.

regards mike
PS do not forget shipping as I am in the UK?













regards mike

Old 03-10-2011, 12:33 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Reply


 


All times are GMT -8. The time now is 07:43 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.