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#58489 03/30/2006 1:52 AM | Joined: Mar 2005 Posts: 576 Shop Shark | | Shop Shark Joined: Mar 2005 Posts: 576 | bought a engine rebuild kit from summit for a chev 350.the kit i bought came with a melling high volume,high pressure oil pump with the pickup welded in place. there is a spring with the pump to convert back to regular pressure.is ther any advantage or negatives to the high pressure? any opinions appreciated........dave
1949 Chevrolet 3100 "When this thing hits 88 miles an hour, you're going to see some serious sh%t." -Doc Brown
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#58490 03/30/2006 2:23 AM | Joined: Jul 2005 Posts: 226 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2005 Posts: 226 | youll get different opinions..pros and cons... i run one..only cuz i like to see higher pressure... and supposedly ive read you can get 1000 rpm per ten pounds of presssure...hence 70lbs 7000 rpm.. most of us including me..dont need that..and a standard oil pump is fine.. ive also read that a hi volume pump can suck the pan dry on and floored hi acceleration without a larger volume pan... of course we can read about anything we want and believe anything we want.... but id guess for normal,,and i mean even hotroddin alittle normal...and standard oil pump is fine... as far as need..??? well i suppose ya need it for racing..or hi rpms applications... ya gonna run ur stovebolt at 7000 rpm..??? hehehe....so what did i tell ya nuthin... like i said..i like to run one...but its not needed for my rusty old chevy pickup thats a little hi performance.. i only kick the four barrel eidelbrock in occaisonally just to hear her suck air...LOL..i dont like buyin gasoline that much these days...LOL..
What it will say on my Tombstone: "Boy, that guy sure owed alotta people Money"
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#58491 03/30/2006 3:33 AM | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy David, As fatweed asked do you really NEED it, hundreds of thousands of s.b.c.s running around with stock oiling systems. Beside that everything that high pressure/high volume pump does requires more power to do it, more parasitic load less h.p. at the wheels, hope this helps. | | |
#58492 03/30/2006 3:39 AM | Joined: Oct 2005 Posts: 275 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 275 | Whenever I've had motors apart I've put in high pressure pumps. No reason why, I just do.
38 original
48 panel
59 stepside
46 in the back forty
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#58493 03/30/2006 4:33 AM | Joined: Oct 2005 Posts: 4,256 "Hey! I sound like Darth Vader!! | | "Hey! I sound like Darth Vader!! Joined: Oct 2005 Posts: 4,256 | I'd leave it like it is and use it. Doesn't hurt to have the extra pressure and might come in handy years down the road when clearances get bigger and pressure goes down. Besides, if you accidently deform the body while trying to change out the spring ( say if you clamp it in a vise ), the whole pump will become worthless.
Actually, the pump doesn't create more pressure. It creates more flow ( which is a good thing.) Restrictions (resistence) upstream from the pump is what creates the pressure. | | |
#58494 03/30/2006 1:39 PM | Joined: Jun 2003 Posts: 156 Shop Shark | | Shop Shark Joined: Jun 2003 Posts: 156 | High oil pressure can cause pre-mature bearing erosion. Not a big consideration , but it can happen.
"All right, they're on our left, they're on our right, they're in front of
us, they're behind us...they can't get away this time"
Lt Gen. Lewis B."Chesty" Puller, USMC
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#58495 03/30/2006 5:11 PM | Joined: Dec 2004 Posts: 56 Member | | Member Joined: Dec 2004 Posts: 56 | check the melling web site... it will explain the difference between "high volume oil pumps" and "high pressure oil pumps"... they are NOT the same thing and have entirely different operating principles...
bill in va | | |
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