427 CBB oil pressure

[SSGN]

Bad oil pressure gauge???Been their done that,just a thought

Kevin

[pmrphil]

if the gauge is OK you might want to consider changing the bypass spring in the pump - as Alan said, not ideal pressure at RPM

[Alan Roehrich]

That is why I suggested a look at the pump. In an engine that old, it is possible that the oil pump bypass spring is bad.

Yes, the gauge too is a possibility. I did not mention it and should have. I always check my gauge right after I check my oil and filter if I have an oil pressure problem. I need to remember not everyone does.

Speaking of oil filters, I suggest using either a long Wix racing filter, or a long K&N filter. By long, I mean the 1 quart filter. Oil filters have been known to cause that problem. I've even seen it with what used to be good filters, the AC PF1218 included. The only AC that may still be good is a PF2232 Duramax filter, but I'd check to see before I used it, and it will be the same price as a K&N or Wix Racing, and you'll know what you have then.

[70RS/SS396]

The motor is modified like this, I know that the oilpump is modified to give this pressure. And they rew this motor 7400 rpm when it was raced in the 80s. But I dont want to risk anything now, ......so there isnt any problem with the pump or oilfilter but is it safe to run a cbb with this oil pressure?
But What oil should I run 40 or 50 ?

Thanks

[james schaechter]

Originally Posted by 70RS/SS396

The motor is modified like this, I know that the oilpump is modified to give this pressure. And they rew this motor 7400 rpm when it was raced in the 80s. But I dont want to risk anything now, ......so there isnt any problem with the pump or oilfilter but is it safe to run a cbb with this oil pressure?
But What oil should I run 40 or 50 ?

Thanks

If this hasn't seen daylight since the 80's it sure would be a good idea to pull the pan and look it over if you can. Much cheaper to do that than to wait for trouble.

[70RS/SS396]

Have done that, and it looks great. And it has new head gaskets ect. The motor is in perfect condition.

But maybe I need to change the oilpump go get more oil pressure.

Originally Posted by james schaechter

If this hasn't seen daylight since the 80's it sure would be a good idea to pull the pan and look it over if you can. Much cheaper to do that than to wait for trouble.

[Mike Taylor 3601]

If you dont know what bearing clearances you have I would check them most likely they are a loose, you can test oil pump by taking old main cap and tap it to accept gauge where oil come from pump,stick in bucket oil spin it w/drill and can see what pressure pump is bypassing at,have someone help hold it or mount to bucket it's hard to hold by yourself.
Mike Taylor 3601