? For the 455 Guys

[1973 Hondo]

If this engine has oil problems, why would you use a h/v oil pump and restrictors? Why not use a stock pump and a stock or 7 qt pan ? Am I just not thinking clear here or what? jawdrop

[396_WAYS_TO_SPIT]

1973 Hondo:
If this engine has oil problems, why would you use a h/v oil pump and restrictors? Why not use a stock pump and a stock or 7 qt pan ? Am I just not thinking clear here or what?The reason for a hi-cap oil pan is to keep the oil as cool as possible. Also, So you wont suck the pan dry. Restrictors is to keep the oil in the pan. The problem is that it gets too much oil in the wrong places- as a result they use restrictors. Just my .02
396
396

[malcolm]

I agree with 396 with the extra oil capacity helping to keep the oil cooler.
I've heard that the large journals of the Olds crank need a large supply of oil to keep up with the 'bearing speed' at high rpm. Hope that made sense. The restrictors only slow the flow to the cam bearings. The top end oils from the lifter rails that are separate from the cam. To restrict the top end you would need the restricted pushrods, but I've also heard those are not needed. I'm going to go with ext. drains to keep the top end dry.
[ December 18, 2002, 07:40 PM: Message edited by: malcolm ]

[1973 Hondo]

I have got a oil cooler on the unit, but thought about polishing the returns in the heads and the oil port to the oil pump, and check my clearances in the pump....? any thoughts to that idea

[malcolm]

Here's a list of oil fixes I've been collecting from various Olds sites:
1. Cam brg restrictors or cam bearings turned 90* and redrilled (.078")
2. Lifter bore restrictors (solids only)
3. Elongate main brg oil supply hole with small round file
4. HV oil pump, large pickup tube, and HD pump drive
5. Port the rear main cap
6. Port the oil filter adapter
7. Drill out crank oil passages that go from mains to rods to 15/64" or even 1/4"
8. Smooth out oil returns in the heads
9. Enlarge main oil galley to main web oil passage to 11/32"
10. Enlarge the main brg upper shell oil holes to 5/16"
11. Oil plug in front of the dist. gear needs a .020-.040 hole in it
I'm not this far on my 455 yet so try these at your own risk.

[Rexone]

I'm far from an Olds expert but years ago when we built engines at Rex we built a fixture for cross drilling the Old's cranks to improve oiling too.

[GlastronGuy]

malcolm:
Here's a list of oil fixes I've been collecting from various Olds sites:
1. Cam brg restrictors or cam bearings turned 90* and redrilled (.078")
2. Lifter bore restrictors (solids only)
3. Elongate main brg oil supply hole with small round file
4. HV oil pump, large pickup tube, and HD pump drive
5. Port the rear main cap
6. Port the oil filter adapter
7. Drill out crank oil passages that go from mains to rods to 15/64" or even 1/4"
8. Smooth out oil returns in the heads
9. Enlarge main oil galley to main web oil passage to 11/32"
10. Enlarge the main brg upper shell oil holes to 5/16"
11. Oil plug in front of the dist. gear needs a .020-.040 hole in it
I'm not this far on my 455 yet so try these at your own risk. 12. Oil plug in front of the timing chain needs a .040 hole it it.
We are also using:
Restricted mains, restricted cam bearings, (holes lined up and tear dropped) restricted push rods, 10 qt pan, return holes in heads have been cleaned up and tear dropped, PCV valve, and oil cooler.

[malcolm]

Restricted mains?

[GlastronGuy]

[malcolm]

Those aren't for the mains, those holes just go to your cam brgs.