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Author Topic:   oil control problem
elvislomas
Member
posted June 01, 2003 08:59 AM
First race last night with new motor.Stock 350 with new cam etc.. Installed a high volume oil pump (65 pounds at idle) and it blows out a lot of oil thru breathers on 4 inch risers. I had one breather on left side and one on right(big mistake).Caught fire on the exhaust manifold after first heat race.Quickly put out by my new favorite pit guy.I have ordered a set of circle track covers but am concerned by the amount of oil passed.Oil pump came with a pressure reducing spring that makes it stock.Will the covers work or should I step the pump down? Thanks for any help!


pit_boss
Member
posted June 01, 2003 09:08 AM
From what I have been told you should not use a high volumn pump with a stock pan, as you can suck the pan dry, we use a high pressure pump in ours, when you start having normal wear around your bearings and things start having more clearance you still have good oil pressure, the only thing I can see is your flooding the top end with alot of unessary oil. as far as the brearhers go, we use new scratch pad material , roll it up and stick it in the breather tubes, this keeps the oil from blowing out. Good Luck !......Jim


racer17j
Member
posted June 01, 2003 11:45 AM
hey pit i wouldn't advise putting anything that can break down and be abraseive in the breathers myself i rolled up some old wool socks and put them in the tube and slid the breathers over it we also in tha past have put old radiator hoses on the tubes and then put the breathers on the end of the hoses with an old piece of pipe then run them over to the front hoop bars to secure them works good


sdhnc29
Member
posted June 01, 2003 12:55 PM
I would look to see where your tubes are on your valve cover's . It's common to see them installed directly over a rocker arm , and the oil from the rocker squirting straight up and out of the breather tube . You can either relocate the breather tube , or install baffles to deflect the oil .

The other thing that will cause this would be an incredible amount of crank case pressure (blow by) caused from poor ring seal , detonation , broken ring's , etc. , etc.

If your using a stock pan , then lower your oil pressure , if your using a left turn race pan , then your pump will work .

Steve

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


rico 08
Member
posted June 01, 2003 01:03 PM
I never have used a high volume pump for that reason on anything.


elvislomas
Member
posted June 02, 2003 08:01 PM
[Thanks for the advise.Stock pan so I'll drop the pressure.


dirtracer7
Member
posted June 03, 2003 07:19 PM
Had the same problem with mine thought the rockers were shooting in the tubes so as Steve said I made some baffles and fixed that problem


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