BBC oil pump on SBC??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cornutz · 08-29-2005, 09:36 PM

Ok,

I saw this in the "pay it forward" thread... what all is involved with this? What length pick up tube do you use? I know it has to be for a BBC oil pump, but again, what length.

any help with this would really help!

Thanks all!

NutZ

cornutz · 08-29-2005, 11:06 PM

anybody?

junkyardjohn · 08-30-2005, 12:56 AM

I'M NOT SURE ABOUT OIL PUMPS, BUT REPLACING SMALL BLOCK WATER PUMPS WITH STOCK BIG BLOCK WATER PUMPS IS THE SH!TS. THEY FLOW LIKE NO TOMORROW.

JOHN

GenIIIShorty · 08-30-2005, 01:56 AM

i've been told a big block oil pump on a small block will give you too much pressure, and you should probably just go with a high volume small block pump, it'll give you plenty. just my .02

stllookn · 08-30-2005, 09:58 AM

cornutz, there is a very long and detailed article on oil pumps for small block Chevy's in How to Build Max Performance Chevy Small Blocks on a Budget by David Vizard. Too much pressure and volume is as bad as too little. The stock pump is fine for 350-375 hp and 6500-6750 rpm. There are some mods to increase the performance of your existing pump by lapping the sides and grinding some small relief passages. The article also discusses installing a big block pump for extra volume, if needed. He spends considerable time on this subject and I can't condense it here. Knowing how you intend to run your engine will help you make an educated decision. You will come away from this exercise a small block oil pump expert compared to your friends!

4x4Poet · 08-30-2005, 02:28 PM

I've often posted about Melling's improved pump design:
http://store.summitracing.com/defaul...part=MEL-10552

Only 10% increase over oem with superior design features and, I would expect, better longevity. Bolt on pickup (no welding needed), longer gear teeth, stronger cover, better supported shaft, etc.

acloco · 08-30-2005, 04:46 PM

Big block pump on a small block does not give too much pressure.

I ran a 350 for over 45,000 miles...with no problems (sold the car).

acloco · 08-30-2005, 04:47 PM

Also..if you are rebuilding any Chevrolet V8 or installing a high volume pump....please spend the $10 or $15...and buy a heavy duty oil pump drive shaft!

08-29-2005, 09:36 PM	#1
cornutz All Praise RANDY!! Join Date: Sep 2004 Location: Central California Posts: 391	BBC oil pump on SBC??? Ok, I saw this in the "pay it forward" thread... what all is involved with this? What length pick up tube do you use? I know it has to be for a BBC oil pump, but again, what length. any help with this would really help! Thanks all! NutZ

08-30-2005, 12:56 AM	#3
junkyardjohn Registered User Join Date: Aug 2001 Location: SOMERSET KY. Posts: 6,425	I'M NOT SURE ABOUT OIL PUMPS, BUT REPLACING SMALL BLOCK WATER PUMPS WITH STOCK BIG BLOCK WATER PUMPS IS THE SH!TS. THEY FLOW LIKE NO TOMORROW. JOHN __________________ junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES// LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST

08-30-2005, 01:56 AM	#4
GenIIIShorty JUNK COLLECTOR!!!!! Join Date: Jan 2005 Location: Spokane, WA Posts: 514	i've been told a big block oil pump on a small block will give you too much pressure, and you should probably just go with a high volume small block pump, it'll give you plenty. just my .02 __________________ baby The dark side! 2000 XLT PSD F-250 4x4! Offroad package 1970 C10 Short-step soon to be short fleet, maybe? Corvette in truck's clothing in work! Corvette IFS, IRS, TPI and Doug Nash 4+3

08-30-2005, 09:58 AM	#5
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	cornutz, there is a very long and detailed article on oil pumps for small block Chevy's in How to Build Max Performance Chevy Small Blocks on a Budget by David Vizard. Too much pressure and volume is as bad as too little. The stock pump is fine for 350-375 hp and 6500-6750 rpm. There are some mods to increase the performance of your existing pump by lapping the sides and grinding some small relief passages. The article also discusses installing a big block pump for extra volume, if needed. He spends considerable time on this subject and I can't condense it here. Knowing how you intend to run your engine will help you make an educated decision. You will come away from this exercise a small block oil pump expert compared to your friends! __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

08-30-2005, 02:28 PM	#6
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	I've often posted about Melling's improved pump design: http://store.summitracing.com/defaul...part=MEL-10552 Only 10% increase over oem with superior design features and, I would expect, better longevity. Bolt on pickup (no welding needed), longer gear teeth, stronger cover, better supported shaft, etc. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

08-29-2005, 11:06 PM	#2
cornutz All Praise RANDY!! Join Date: Sep 2004 Location: Central California Posts: 391	anybody?

08-30-2005, 04:46 PM	#7
acloco Registered User Join Date: Apr 2004 Location: Nebraska Posts: 335	Big block pump on a small block does not give too much pressure. I ran a 350 for over 45,000 miles...with no problems (sold the car).

08-30-2005, 04:47 PM	#8
acloco Registered User Join Date: Apr 2004 Location: Nebraska Posts: 335	Also..if you are rebuilding any Chevrolet V8 or installing a high volume pump....please spend the $10 or $15...and buy a heavy duty oil pump drive shaft!



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.