AMX 401 Take 4

Rebel Machine wrote: 304-dude wrote: Gosh, that video explanes my thoughts about you getting oil squirted situation thsituationpump hole. Not sure, but it seems that there is a lot of oil flow from the gear and cam reliefs. A bit more than I expected. it is possible to much oil up front in the cover, that is causing your lack of oil... if so, reputationthe front edges of the #1 main, or solve the exessive oiling at the cam. That's what I'm thinking. It makes sense. I removed the cam and the bearings are worn, only ran this engine for about 50 miles. Also the oiling hole in the front cam journal is lined up with the cam bearing oiling hole when it pushes that much oil through. Not sure how much flow that translates to when the cam is spinning. Weird thing is the factory AMC timing gear doesn't look all that different. Gonna have to give this some thought.

nda racer wrote: purple72Gremlin wrote: IIRC, I knew someone else having problems with oil control, he put a bigger pan on it, problems went away. Stock or performance build?

performance.

purple72Gremlin wrote: nda racer wrote: purple72Gremlin wrote: IIRC, I knew someone else having problems with oil control, he put a bigger pan on it, problems went away. Stock or performance build? performance.

Performance build.... performance pan.


If it's bearing/lifter clearances, wouldn't the oil pressure suck all the time? I have wore out mills, (big clearances) and the pressure is low across the board.

It all comes back to the pick up tube "clearance" and/or not enough pan.

Couple things:

1) What is the oil temp of the AMX vs. the Machine? Same oil (viscosity and brand)? On the 4 or so tries don't recall if you tried a thicker oil or if all were 10W30?

Assume the AMX make more power? Power = heat. Heat = thinner oil. Thinner oil = lower viscosity. Lower viscosity = lower pressure.

Still doesn't explain your loss of pressure when you get on it then quick recovery ... to me that's a suction leak (quick accel = max suction so will find a suction leak more so than cruise), pump cavitation (restricted inlet or oil sloshing away from the pickup), relief valve popping open and sticking, or parts move under load increasing clearance.

Does it lose pressure at steady rpm (medium or high), or only with quick accel or braking?


2) For oil from timing cover, if there's a bunch of oil maybe it wants a drain line tapped into the front cover and back to the sump ... or a full length windage tray so oil returning from the front isn't whipped around by the crank?

I have pictures somewhere that showed the original Aviaid TA pan with full length tray. They cut-out the front of the pan and put a false bottom on it so oil could return under the tray and clear of the crank.

Hope this helps,RD.

PS. What oil viscosity is Tony running?

Here's the 1968?? Aviaid TA pan and tray. The one they sell now is deeper and with an external pickup, but only has a partial tray over the sump.





Edited by Red Devil - May/26/2014 at 10:05am

nda racer wrote: purple72Gremlin wrote: nda racer wrote: purple72Gremlin wrote: IIRC, I knew someone else having problems with oil control, he put a bigger pan on it, problems went away. Stock or performance build? performance. Performance build.... performance pan. If it's bearing/lifter clearances, wouldn't the oil pressure suck all the time? I have wore out mills, (big clearances) and the pressure is low across the board. It all comes back to the pick up tube "clearance" and/or not enough pan.

A performance pan is probably warranted but I didn't have an issue with a stock pan & pickup in the previous 401. I will probably invest in one.

-Steve-