I need to put an oil pump in my BBC project and was wondering what I should be looking for in a pump. Should it be stock, high volume/pressure? Do I need to mess with by pass springs or anything like that? I got one recomdation so far for a Melling pump.

Stock....
Hi Volume/Pressure will eat up your distributor gear.

i agree...stock

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There's RARELY ever a reason to go to anything more than stock on a street motor.

After rereading my own post I should have more correctly said street/strip combo. This will be for my hi-po 454 I am building. I meant this will be driven mainly on the STREET and not the TRACK. (brain doesn't seem to work as well as it used too, lol)

I've used stock oil pumps in 7000 rpm plus SBC's and BBC's and never had a problem.

I've used HV's and had problems.

The HV type pumps have a place, some engien designs require very high oil pressure to function, but the excellent design of the Chevy V8 was well thought out and requires no additional modification for most applications.

The M-77 pump with hi pressure spring is what we have used for years with no problems.

<font face="Arial,Verdana" size="2">Originally posted by CNC BLOCKS:
The M-77 pump with hi pressure spring is what we have used for years with no problems.</font>

Thanks CNC, that's exactly the configuration I was suggested, the melling 77 and change the spring. Is that broken pump gear on your other post anything to worry about.

Stock! These things were so well designed that anything more is just more oil recirculated inside the pump, heating up, and so on. BBC oiling systems are outstanding out-of-the-box.

Keep in mind that the pump just supplies oil to the bearings, and you don't want to wash them out (which high pressure pumps are great at doing). If you have the all-important oil between the crankshaft and bearing, more pressure doesn't equal better lubrication. It just equals more windage problems. The only oil starved part of a big block Chevy is the camshaft lobes, which don't get pressurized oil anyway. Stick with a stock pump.

Stock or stock with a hi pressure spring is ALL you will ever need http://www.nastyz28.com/ubb/biggrin.gif

OK so I ordered the M-77 pump from Summit, and it didn't come with a spring (besides the one in the pump already). I went to the Melling site and see a pump that has 25% more volume than stock part number 10770, this pump looks like it comes with another spring. Did I get the wrong pump? The stock pump I bought was only $25, Summit has the 10770 pump for $58 if that rings a bell with anyone.

another vote for stock

Go to your local GM dealer for the high pressure spring.

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Just got off the phone with Summit, becuase I just noticed they sent me the M-77HV and not the standard M-77. I think that is why it didn't come with a spring. Goody this means they get to pay for return shipping (I've done it before so no Summit bashing please http://www.nastyz28.com/ubb/smile.gif )

<font face="Arial,Verdana" size="2">Originally posted by theflash:
Just got off the phone with Summit, becuase I just noticed they sent me the M-77HV and not the standard M-77. I think that is why it didn't come with a spring. Goody this means they get to pay for return shipping (I've done it before so no Summit bashing please http://www.nastyz28.com/ubb/smile.gif )</font>

Hooray, my oil pump came today, just the stock M-77 and guess what it came with a spring too (says use spring when replacing H/P Corvette pump). They also sent me a hat, lol.

OK, one more question, the motor didn't come with a pump when I bought it, so what kind of bolt do I use to bolt it it with? Is there a special type? Can I go to any hardware store and get one, should it be a grade 5 or grade 8? Is there a gasket that goes between the pump and the block?

ARP makes bolts, time to call Summit back as I am sure they sell them. Hardware store bolts only go on the kids bikes.

I second that. I use a lot of hardware store (grade 8 and stainless) bolts from the hardware store, but never inside an engine- they're find for holding manifolds, fuel pumps, etc. on the outside of the engine but never internally.

The dealership might be a cheaper alternative if you're just buying one bolt. Summit's description for the oil pump stud fills you with horror stories of oil pumps falling off into the pan, but I've never seen this happen- have any of you guys? Maybe it does, admittedly my experience is limited, but it sure sounds awful rare. It just doesn't seem like any street motor would put much more than normal stresses on this bolt when using a standard pump.

I got you on that Doug....I hear of oil pump pickups falling off, never any oil pumps themselves....

I might just order that ARP stud kit for the pump, but I know what your saying Doug, I have Never heard of a oil pump falling off inside a motor. It just sucks trying to buy all the little hardware pieces. I recently bought this motor, and it was missing all but 4 of the oil pan bolts, no oil pump (or bolt), intake was off, so I had to buy all new intake bolts. No header bolts. It's all this little sh*t that is keeping me from putting the damn thing together. However one more order and I should have over 90% of what I need.

I used a grade 8 hardware store bolt on the 350 that sin my truck and the oil pump has held strong for over 5yrs now

<font face="Arial,Verdana" size="2">Originally posted by rscamaro73:
I got you on that Doug....I hear of oil pump pickups falling off, never any oil pumps themselves....</font>

Been there, done that, motor blew... http://www.nastyz28.com/ubb/frown.gif

I'm running a high-volume but not a high pressure oil pump right now, as I recall. I have around 30 or so pounds of pressure at idle, and over 60 pounds with the motor wound up. Have yet to have a problem, but I can't remember the part number for what I have. Just my comment, enjoying the posts...

<font face="Arial,Verdana" size="2">Originally posted by 1981Z28_454:
Been there, done that, motor blew... http://www.nastyz28.com/ubb/frown.gif

</font>

That reminds me, I'll need to get that pickup tack welded on.

<font face="Arial,Verdana" size="2">Originally posted by CamaroMan79:
I used a grade 8 hardware store bolt on the 350 that sin my truck and the oil pump has held strong for over 5yrs now</font>

Sure now you tell me after I spent $5 on one frikken stud http://www.nastyz28.com/ubb/wink.gif

Don't feel bad, I gave in and ordered one from Summit on Friday. It's supposed to be here tomorrow.

I guess I'm gullible too.