just want some reassurance on combo choices

yes Ive done that many times, but Id point out that you already have more oil pressure than would be ideal,
the whole concept of trouble shooting is to TEST AND ISOLATE the cause, not to start replacing parts, until,\
you know what is currently causing the problem. you should have about 30-35 psi at cold idle and no more than 70 psi at peak oil pressure,
swapping to the standard volume BBC oil pump, is certainly an option, but not necessarily something you might want too do, yet.
big_block_engine+.jpg

floordepth.jpg

sbcvsbbcgears.jpg


bbbcpump.jpg



http://garage.grumpysperformance.com/index.php?threads/bbc-oil-pump-in-a-sbc.2598/

http://garage.grumpysperformance.co...chevy-oil-pump-style-guidelines-advice.13205/

http://garage.grumpysperformance.com/index.php?threads/bearings-and-oil-flow.150/
 
Grumpy said:
yes Ive done that many times, but Id point out that you already have more oil pressure than would be ideal,
the whole concept of trouble shooting is to TEST AND ISOLATE the cause, not to start replacing parts, until,\
you know what is currently causing the problem. you should have about 30-35 psi at cold idle and no more than 70 psi at peak oil pressure,
swapping to the standard volume BBC oil pump, is certainly an option, but not necessarily something you might want too do, yet.
Click to expand...
Just Strange to me Grumpy.
The other half of me is Pontiac Guy besides Chevy Vette Guy.
High oil pressure 100 psi in a Pontiac V8 is a Celebration !
It's going to Live !
 
both G.M. engineering and smokey yunick working for NASCAR and G.M. ENGINEERING,
did extensive testing on engine longevity, and bearing durability in relation to oil pressure
there was no measurable improvement in bearing protection once oil pressure reached 70 psi.
there was an improvement if the volume of oil flow was increased but not pressure,
pressure is simply a measurement of RESISTANCE to flow.
look at these charts, the sweet spot in bearing clearance vs load falls in the 2-2.5 thousanths of an inch range



clearanceload.jpg



clearanceflow.jpg



clearancetemp.jpg
 
Christopher Williams said:
I did however restrict the oil in that back galley right before #8 lifter.
Click to expand...
I'm not familiar with this mod, what's the purpose?

Christopher Williams said:
I didn't modify the distributor any, I guess I could put a little groove in it.
Click to expand...
I would wait until you find out what your final setup does, whether that's with 10w30 or what ever,
then you could add the modification to the distributor to adjust the pressure.

It's not so much about the pressure, but the hydrodynamic oil film that's created by the available
oil and the cranks rotation. If easy enough, then you could always add more clearances to the
timing chain or thrust bearing.

 
Grumpy said:
both G.M. engineering and smokey yunick working for NASCAR and G.M. ENGINEERING,
did extensive testing on engine longevity, and bearing durability in relation to oil pressure
there was no measurable improvement in bearing protection once oil pressure reached 70 psi.
there was an improvement if the volume of oil flow was increased but not pressure,
pressure is simply a measurement of RESISTANCE to flow.
Click to expand...
For Chevy V8.

Malcolm McKeller did all the work for Smokey Yunick before he Raced Chevrolet .Started off Pontiac V8 Smokey did.
 
Indycars said:
I'm not familiar with this mod, what's the purpose?


I would wait until you find out what your final setup does, whether that's with 10w30 or what ever,
then you could add the modification to the distributor to adjust the pressure.

It's not so much about the pressure, but the hydrodynamic oil film that's created by the available
oil and the cranks rotation. If easy enough, then you could always add more clearances to the
timing chain or thrust bearing.

Click to expand...
It's a Mod that came about by a Chevy Big Block Engine Builder with Dart Blocks.
About this time last year on a F.B. Big Chevy Race Group I am in.
Shared last year.
Our guy with his Dart Big M 496 Camaro did the Oil mod.
 
Guys were having terrible issues with Hydro cams lifters rattling. No oil flow.
Even Morel lifters failed exploded prior.
 
Indycars said:
I'm not familiar with this mod, what's the purpose?


I would wait until you find out what your final setup does, whether that's with 10w30 or what ever,
then you could add the modification to the distributor to adjust the pressure.

It's not so much about the pressure, but the hydrodynamic oil film that's created by the available
oil and the cranks rotation. If easy enough, then you could always add more clearances to the
timing chain or thrust bearing.

Click to expand...
There has been a lot of people complaining about morel lifter noise in the dart blocks and other blocks. Theoretically it blocks the end of the galley and keeps the lifters pumped and pumps up a little quickly. That was suggested by Scott Foxwell for the shp blocks. There is a video regarding it. It takes a machined aluminum plug with a .040" hole or so and blocks the area from the #8 lifter in between the last lifter. You insert it through the rear galley plug with a machined rod. It would be a booger to get out. Lifter would have to come out, which means head has to come off since the lifters won't go in due to clearance issues....I will eliminate some easy stuff at first for sure. I have ran a BBC pump several times on a sec, never have I ever had 100psi. I'm honestly not sure what the true pressure is since the gauge stops at 100psi. I just hope I don't have a serious restriction somewhere that will be problematic.
 
So you eliminate a Dart Block SHP, Little M & Big M Bleed hole .
Plausible reason why 100 psi oil pressure present now.
 
Maniacmechanic1 said:
I don't know.
For all I know Melling pumps for SBC made in China maybe.

Big Chevy has best of everything.
I say try a Big Chevy Oil pump.
Click to expand...
I'm ok with trying it, but I'm going to try some other easy stuff before. Not sure that would cure my problem, those BBC pumps move some oil. I'd think I'd run into the same issues.
 
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