300 six oiling

[ford6man27]

Question for the big block six guys. Of all the ways to slow down oil supply to the top end at high RPM, what is the best way? My 300 dirt track engine pumps way to much oil to the top end at 6300 to 6500 RPM. I have tryed a couple of things but would like to hear some different ideas.
Thanks
Andy

 

[Geezer 300]

Probably not a good idea, but I've heard of people using pipe cleaners stuffed into the pushrods !!

 

[Leddemo]

while I haven't done it myself, I've heard of coatings that can be applied so that oil doesn't stick to the surfaces (teflon maybe? same principle at least). While it won't really limit the amount getting up there, it'll allow it to drain back to the pan much quicker.

I ran across it while looking for reducing windage. I guess they can get fairly elaborate on which surfaces they can do, even all the little drain back holes.

 

[Asa]

while I haven't done it myself, I've heard of coatings that can be applied so that oil doesn't stick to the surfaces (teflon maybe? same principle at least). While it won't really limit the amount getting up there, it'll allow it to drain back to the pan much quicker.

I ran across it while looking for reducing windage. I guess they can get fairly elaborate on which surfaces they can do, even all the little drain back holes.

in that vein, what about the possibility of removing the head and polishing the top of the head so that the oil flows back quicker?

 

[wallaka]

Should be able to put a restrictor in the oil passages, that's how the Buick and other V8 guys do it. Usually a brass bead that is pressed in, with a hole drilled in it.

Like this...though I don't know what size you need.
http://www.pricemotorsport.com/html/body_oil_restrictor_kits.html

 

[StrangeRanger]

The external oiling system sounds like a better idea. If you supply more oil to the rear main bearings, that will naturally reduce the flow to the top end without putting in any metering orifices.

 

[worken2much]

Hey, I have the easiest approach of all. You could just slow down some and then you wouldn't be turning so many rpms. That would give the rest of us a chance to catch up too!!!

I've heard of both the pipe cleaner trick and the external oil routing. Never have done either myself.

Have fun
Worken2much

 

[fmartin_gila]

The Chebby Metro/Geo/Suzuki 1.0 Liter 3 cylinder engine used a restrictor/check valve in the passage in the block leading up to the overhead cam/hyd lifter gallery. This check was dropped into the passage prior to the head being installed, which held it in place. Available from the Chebby parts counter for about twelve bucks. Probably can also get from Suzuki parts. This, if incorporated in your installation, would also prevent dry upper end start-ups.

Fred

 

[nitrousnick]

the oil galley that feeds the oil to the upper end comes from the lifters,that is the same galley that also feeds the main bearings,so any restriction there would not be good.
on my engine i tapped into the main galley where the oil filter goes and ran an external oil line to the front of the engine where i drilled and tapped an other hole in the oil galley ,does it help?...........i dont know,i never had any problems yet,but i think it would be fine without.

 

[frank b]

Maybe using a stock oil pump instead of a high volume one? That would be a hard decision to make with a high dollar engine. But using synthetic oil should still provide the proper lubrication.