Vac pump destruction / mystery

[CFMCNC]

WE use Brad Penn break in oil on our dyno a lot, but of all the break in oils we get the BP out of the engine before it goes in the car ,WE use vacuum pumps on most of race engine we build with no failures related to the vac pumps.Bill C.

[MAURICE BLENDHEIM]

Your 60lbs. oil pressure. Are you taking your oil pressure reading from the rear or the front of the block? MB.

[joespanova]

Originally Posted by MAURICE BLENDHEIM

Your 60lbs. oil pressure. Are you taking your oil pressure reading from the rear or the front of the block? MB.

Thank you all for replying , trying to help out BTW...
I take oil pressure off the rear of the block.
Every single bearing had trash in it..........I'm actually beginning to doubt the pump is the problem myself................hell , I dunno..........I mean , its not like I haven't put plenty of engines together over the years. I've actually had these engines ( in the race car ) apart over the years and the bearings come out looking great , also...........so as the thread states , this is a "mystery" to me.
Some of you may recall I have lost oil pressure even in this new block , pulled it down and found all the main bearings were completely destroyed .as well as the center main caps on a brand new Dart block.
Please look thru this thread..........realize the vac pump is the common denominator.
http://classracer.com/classforum/sho...t=61697&page=2

[monte442]

I've seen bad finishes on crank hurt bearings. Was every plug and all cam bearings removed from the block when it was cleaned,was it cleaned with brushes in all of the oil galleries ? Are all of the oil pump mating surfaces true and clean ,pick up welded and sealed to pump ? If it is pumping aerated oil through the system it will never maintain an oil wedge between the crank and bearings.

[CFMCNC]

Center main caps ,Detonation ,very high cylinder pressure trying to push the crank out the bottom.Most bearing failures are from missed tune .Bill C.

[joespanova]

Originally Posted by CFMCNC

Center main caps ,Detonation ,very high cylinder pressure trying to push the crank out the bottom.Most bearing failures are from missed tune .Bill C.

Missed tune...........I sure hope not. At 355 inches , std port 23 degree heads N.A. and 3000lbs to run a 9.41@142 I must be doing something right , anyway.
No I'm not beating my chest here either..........

Total timing never more than 40 , 2 660's textbook jetting........etc etc

[CFMCNC]

Track performance is very impressive,Has the engine been on engine dyno?.Bill C.

[Ed Wright]

Originally Posted by joespanova

Missed tune...........I sure hope not. At 355 inches , std port 23 degree heads N.A. and 3000lbs to run a 9.41@142 I must be doing something right , anyway.
No I'm not beating my chest here either..........

Total timing never more than 40 , 2 660's textbook jetting........etc etc

A 350" with 40 degrees?? Looks like CFM was right. I have never seen a 350" need more than 34 to 36. Sounds like detonation to me.

[ScottHall]

JOESPANOVA,

I believe I have the answers you are looking for, and it would much easier to talk to you over the phone, and then post what we concluded.

If you would like to, please call me at Moroso at 203-689-4010

Thanks,

Scott Hall

[joespanova]

Originally Posted by ScottHall

JOESPANOVA,

I believe I have the answers you are looking for, and it would much easier to talk to you over the phone, and then post what we concluded.

If you would like to, please call me at Moroso at 203-689-4010

Thanks,

Scott Hall

Will do.....today.