Outside oil return
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,590
Likes: 3,362
From: Cental, MI
Never seen it done that way... generally into cam chest, or closer to the Breather Gear cavity. On an engine with a better oil scavenging system.. [Sportsters] go to anyplace behind the windage tray.
We used outside oil returns either because of such a big bore there was no room for inside returns, and/or to keep top end oil off of the flywheels.. as a Performance enhancement.
Your shown set-up looks to be returning oil to the approximate location of Stock...
What am I missing here??
as an aside... I learned to severely restrict the oil feed [by an adjustable bypass] during a "run" to eliminate so much excess oil in the engine... Works!!!!
We used outside oil returns either because of such a big bore there was no room for inside returns, and/or to keep top end oil off of the flywheels.. as a Performance enhancement.
Your shown set-up looks to be returning oil to the approximate location of Stock...
What am I missing here??
as an aside... I learned to severely restrict the oil feed [by an adjustable bypass] during a "run" to eliminate so much excess oil in the engine... Works!!!!
Road Warrior
Joined: Dec 2007
Posts: 1,286
Likes: 64
From: SoCal
Do you combine both oil returns into that one drain?
I like the idea that it drains back between the crankshaft wheels.
But I suppose the piston skirt spreads it out and it gets all over the place anyway.
I like the idea that it drains back between the crankshaft wheels.
But I suppose the piston skirt spreads it out and it gets all over the place anyway.
Last edited by megawatt; Sep 15, 2018 at 10:06 AM.
Thread Starter
|
Road Master
Joined: Apr 2012
Posts: 979
Likes: 38
From: new orleans,la
the front and the rear are centered on the cylinder --I have Teflon buttons on the pistons so the oil wont goo through the wrist pin to the other side of the piston-- -- the main idea is for the oil to get on the thrust side of the piston -- might help with piston wear -- -- the oil has to go back to the crank case because the oil is thrown onto the cylinder to lube the rings --
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
We tie outside drains to the the primary return side of the pump, if running a belt, or primary in it's own oil.
Also, in maximum effort applications, we have pulled unwanted excess oil from the cam chest to the return side of the pump via drilled/tapped 1/6" NPT fittings.
Scott
Also, in maximum effort applications, we have pulled unwanted excess oil from the cam chest to the return side of the pump via drilled/tapped 1/6" NPT fittings.
Scott
Thread
Thread Starter
Forum
Replies
Last Post
