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Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Sat Sep 01, 2007 11:59 am Post subject: Deleted

deleted

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

Last edited by Roger Lee on Sat Mar 08, 2008 8:42 am; edited 2 times in total

Savannah174(at)msn.com
Guest

Posted: Sat Sep 01, 2007 4:32 pm Post subject: Oil Pressure

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  What was used for shiming?

  

 RJ

 [quote]   ---

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Sat Sep 01, 2007 5:43 pm Post subject: Re: Oil Pressure

You can buy the shims from Rotax or make your own. I made my own. You can use aluminum, stainless or lexan. Lexan is the easiest to shape in a small round circle. It just takes a few minutes with a Dremel. Very easy to get the pressure you want.

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Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

ptag.dev(at)tiscali.co.uk
Guest

Posted: Sat Sep 01, 2007 9:45 pm Post subject: Oil Pressure

Roger...

IMHO to use aluminium for the packing under the spring would be a "no

no" since the spring will chatter into the shim. Only use a steel shim.

Regards

Bob H G-PTAG



Robt.C.Harrison

--

Thom Riddle

Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)

Posted: Sun Sep 02, 2007 3:45 am Post subject: Re: Oil Pressure

Roger,



Under what conditions were you getting 46 psi oil pressure? The 912 Operators Manual states that normal oil pressure at 3500 rpm or higher is between 2.0 - 5.0 Bar (29-73 psi). Our 912UL with over 500 hours on it is running around 49psi at normal cruise rpm with the engine at normal operating temperature. 



After adding the shim, if you are getting 66 psi during cruise and a warm engine, what is the initial oil pressure when starting and the engine is cold? Does it get above 73psi?

_________________
Thom Riddle
Buffalo, NY (9G0)

Don't worry about old age... it doesn't last very long.
- Anonymous

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Sun Sep 02, 2007 8:08 am Post subject: Re: Oil Pressure

Hi Thom,



My 912 on my Kolb at 480 hrs. ran at 49 then dropped to 39 over the course up to 860 hrs.



My FDCT started at around 55 when new and now at 160 hrs. it was running at 46. I know this is well within normal range, but I would prefer that it was a little higher. I believe it does a better job of forcing oil into tight areas under heavy use times, but I have no documentation to back that up. A lot of cars and motorcycles run around the 60 psi range. When I start my engine and idle at 1800-2000 rpm my pressure is about 65 and even when I am at cruise it seems to stay there. My oil pressure never gets above 66 psi. I use Amsoil 20-50 motorcycle oil. Less foaming characteristics and better shear qualities than Mobile 1 Racing 4XT. Moblie 1 is a good oil I just prefer Amsoil for my gear wear.

Have been using it, as a lot of other riders, in my Honda Goldwing for years. My tranny in my Goldwing is absolutely smoother and quieter.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

Fergus Kyle

Joined: 03 Jun 2007
Posts: 291
Location: Burlington ON Canada

Posted: Wed Sep 05, 2007 8:11 am Post subject: Oil pressure

Thom, et al,

	I am presuming you are thinking of excessive oil press when cold,

and coring of the cooler rad. I am out of touch but remember my instructor

insisting on my watching the oil pressure gauge after startup to see the

pressure drop because the thermostat opened the bypass valve to let warm oil

into the rad after several minutes - of course we're talking below zero

starts here.

	What are your ideas re: the perils in winter starts - say near the

Great Lakes?

Cheers, Ferg

Thom Riddle

Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)

Posted: Wed Sep 05, 2007 9:29 am Post subject: Re: Oil Pressure

Fergus,



If I was any nearer the Great Lakes (Lake Erie) I'd be needing scuba gear. The oil thermostat we installed on our 912UL is open about 10% until the oil temperature starts rising and then gradually opens up to full open at 180F. Therefore there is no abrupt rise or fall in oil temp due to quick opening and/or closing. It never closes completely so there is always at least a little oil flowing through the oil cooler. There are no perils in winter starts for this reason. The oil temperature comes up a lot quicker with the thermostat than before we installed it. It also keeps the oil temperature up to near normal during long idle power descents, which was not the case before the thermostat installation. A good investment.

_________________
Thom Riddle
Buffalo, NY (9G0)

Don't worry about old age... it doesn't last very long.
- Anonymous

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Wed Sep 05, 2007 10:20 am Post subject: Re: Oil Pressure

Hi Fergus,



I agree with Thom. These little oil thermostats do not cause any significant drop in temp when they open fully. I had this thermostat in my last plane and it worked very well. I have another to put in my Flight Design Ct for this winter, but the temps here in Tucson need to get below 100F first.  LOL 

Some thermostats do, but this particular one does not and it keeps the temps up when idling in cold weather. Some do drop and when I flew my helicopter that is what I looked for in the warm up is when the coolant temp took a sudden drop of 

10-20F.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Wed Sep 05, 2007 12:18 pm Post subject: Oil Pressure

Thom:



Is that the same oil thermostat sold by Air Wolf for the Rotax engine?

Noel

912 to be installed



[quote] --

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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

Savannah174(at)msn.com
Guest

Posted: Wed Sep 05, 2007 4:09 pm Post subject: Oil Pressure

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Thom, Buffalo does get cold but here in Boston cold as well but not as  cold. The thermostat that you have installed would that be the one listed in the  Lockwood catalog? I'm thinking of doing an installation of a thermostat, any  recommendation?

  

 RJ

 [quote]   ---

Thom Riddle

Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)

Posted: Wed Sep 05, 2007 4:45 pm Post subject: Re: Oil Pressure

The oil thermostat I bought from summit racing



http://tinyurl.com/3bunxb



is made by Permacool.



http://tinyurl.com/3yrt5d



When you see the price from Summit Racing, you'll know why I bought it from them rather than any of the aviation sources.

_________________
Thom Riddle
Buffalo, NY (9G0)

Don't worry about old age... it doesn't last very long.
- Anonymous

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Wed Sep 05, 2007 5:11 pm Post subject: Re: Oil Pressure

Hi Thom and RJ,



They are the same thermostat made by Permacool. I did happen to buy mine at CPS.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

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