there is a concern..

a new distrubuter has a 3/8" groove around the bottom of the housing. the orginal has a 1/4" groove.. yes there is oil flowing to the rockerS. when i prelube with drill . i got 50 lbs cold ..remember this engine is newly rebuilt. will this cause less oil pressure when hot? i not liking low pressure.. please your comments

the new oil pump is an M55 high volume.

 

IMHO no.

If you end up with to much oil to the rockers you could do the old pipe cleaners in the push rod trick.

 

LOL, yea, I remember those days.

Now there are pushrods with reduced ID to reduce oil provided to the rockers. Comp and others sell 'em.

To OP, whether 50 psi is good when priming can depend on what weight oil you poured in. Think 0-30 synthetic Vs non-syn 20W50.

With non-synthetic 20W50 Valvoline VR1 Racing oil in a fresh build I see 60 psi with my pressure gauge screwed into the top back of the block.

Jake

 

it not a question of too much oils to the rockers,, the question is: does the distributer small groove reduce oil pressure ? and could add, why is the pressure low?
the oil this engine is using is good old 10w/30..and is not of relelance..

hi jake it been a while hopefully you can help as you did inj the past..

 

You don't need to shout, just trying to help.

Do you know what you have?

Your first post says you have a larger grove in the distributor & low oil pressure.

Now your asking if a small grove reduces oil pressure. Did you mean does a large grove reduce oil pressure?

Are you checking with a mechanical gauge or the one in the cluster.

How many rpm is your drill turning when checking the pressure.

You may have a high volume pump however the pressure relief spring may be for stock oil pressure.

Another common problem with builds if you have a first generation small block is that a short head bolt (the corner ones) get used to secure the oil pump. The bolt is to long & bottoms in the main cap leaving a small gap between the pump & main cap.

Good luck

end.

 

dah , yes i do know what i have
a new distrubuter has a 3/8" groove around the bottom of the housing. the orginal has a 1/4" groove.. yes there is oil flowing to the rockerS. when i prelube with drill . i got 50 lbs cold ..remember this engine is newly rebuilt. will this cause less oil pressure when hot? i not liking low pressure.. please your comments

the new oil pump is an M55 high volume.

1) the bolt on the was shorten to correct lenght and no gapS
2)orginal distriber has 1/4" groove, does this reduce oil pressure?
3) When i measured a new distributer it has 3/8" groove? does this reduce oil pressure? did i say i installed it ? NO
4) two gauges connected one at the oil filter where the temperature gauge was. the other is dash both read the same.
5)oil pump is m55.. with preset spring for max 55-60 lbs and comes stock and is brand new, should you want to ever increase pressure add one washer about 15 thousand thick under the spring for every five lbs extra( bet you heard of that?)
6) i not shouting by enlargeing the print THIS IS SHOUTING when all caps are used
7)how fast is my drill turning ? full load rpm of the drill is 650 yields 55-60 lbs of pressure SO WHAT? at idle the cam turns 1/4 the speed that of the crank.. ex 1000rpm = 250 cam
8) funny thing you for got to mention if the plug under the rear main bearing was instaled?? WELL YES IT WAS.. yeh
9) jake where are you ? what is the cause of low oil pressure? referring to the above

 

ttt