Great info Mikey ! I run a bbc oil pump in the 355 of my Van, I also use a scraper, vindage tray and a homebuilt smuggler pan (a friend saw it, thought it was huge and asked if i was going to start smuggeling oil).
I havent been able to test it out yet as the car is still without doors, I have used a bbc pump in a sbc before thus, with good results. Andr� > The oiling system of the sbc is very superior compared to many others. I have never heard or seen a sbc with an oil return problem, the larges t oiling hindrance is actually the crank. Also the lifters will not let that much oil get to the top end (as they have metering valves) so to ha ve an oil return problem. Unfortunetly the oil pan just being in the bac k of the motor is not all that is needed to keep the pickup wet... > > I have seen many sbc drag cars act exactly as you are saying because o f their oil pan design, pickup setup and position, etc. The number one e rror I see is people select a HV or a HV/HP pump and don't upgrade their pickup. This is extremely common and CAN SOMETIMES pose a problem. A HV pump will be fine in a stock system, but a HV/HP (High vloume/high pres sure) will cause lots of problems. HV/HP pumps are designed for modified , increased capacity oiling systems. Some companies sell you a HV/HP pum p and tell you to change the spring out for a HV only. Usually the direc tions/sheet is semi unclear so sometimes people don't because they think that will change it back to a stock pump. Oil pan selection is also cru cial as you want one that is baffled to help keep the oil from sloshing away from the pickup in the pan. Aftermarket baffles and scrappers are u sed to keep oil from gathering around the crankshaft and helps scrape/bl ock the oil so it returns to the pickup area. Oil can collect in the top part of the pan on shifts or deceleration and becomes too close to the rotating assembly of the crank and gets sucked in from the front/top par t of the pan, thus the windage tray works excellent in this situation. T he pickup also needs to be position approx. a 1/2" or so from the bottom of the pan, some guys with larger oiling systems vary this clearance th ough. The pickup should be welded in this position to prevent it shaking loose or moving down with high rpm use. When you weld, it is highly rec ommended that you disassemble the oil pump. > > What type gauge do you have in your car? Most cheapie gauges, stock ga uges, and especially stock idiot lights are very unreliable, thus when y ou are looking at oil pressure problems as a technician, we have a rathe r expensive gauge that we connect to a number of different locations on the motor. Where is you sensor located. Oil pressure will vary slightly throughout the engine. Generally in my experience oiling problems first show in the crank bearings and rod bearings farthest from the oil pump. > > Overall... to make things simple, if you wanna drag race... you need t o run a better oiling setup. The forces of the car need more oil to keep the pickup with a supply of oil. But this is not cause the oil pump pum ps the pan dry. Find the Melling and Moroso oil pump pages on the web. T hey both have some good information on pumps and oiling in general. I hi ghly recommend the 7qt Moroso setups with a windage tray for any sbc and some of the basic machining mods for the internal engine parts. There a re also an increasing number of guys running BBC's oil pumps in there sm all blocks now. If you run you car hard on road race course or the strip , a windage tray is very cheap insurance no matter if you keep a stock s tyle system or a modified system. It comes back to what seems to be a ve ry true statement in life..."Ya gotta Pay to Play". > > Mikey > > ----- Original Message ----- > From: vmckague > Sent: Sunday, July 21, 2002 8:33 AM > To: [EMAIL PROTECTED] > Subject: Re: [Chevelle-List] Oil pressure > > Mikey, All I know is I have seen this happen in my own car. At the end of the track at WOT my oil presure light would filcker, not a idiot lig ht but a true oil pressure light set at 15 lbs. this was with a 454 with out oil restrictors. I asked other drivers about it and was told to get a larger pan as I was pumping it dry. Did get a larger pan and it solved the problem. If the oil pickup is in the right place in a bbc I don't s ee how it could become uncovered under hard acceleration as it would pla ce more oil to the back of the pan. One other thing I thought people use d scrapers to gain HP. Like I said just my 2 cents worth. Vernon > ----- Original Message ----- > From: Capt Crunch > To: [EMAIL PROTECTED] > Sent: Sunday, July 21, 2002 12:15 AM > Subject: Re: [Chevelle-List] Oil pressure > > > That is completely untrue! That is not possible if you have a healthy motor and haven't made any mods to your oiling system like restrictors. Both solid and hydraulic lifters have metering valves to limit flow of t he oil to the top of the engine. If a pan is pumped dry, it is because t he holes that drain oil back to the pan are plugged. One thing that does happen on occasion is that the oil can stick to the crank, but that is why people use scrapers and windage trays. Also the oil pump pickup can somethimes be uncovered during hard acceleration or incrorrect position ing of the oil pickup will both lead to oil problems. > > Mikey > > ----- Original Message ----- > From: vmckague > Sent: Saturday, July 20, 2002 5:57 PM > To: [EMAIL PROTECTED] > Subject: Re: [Chevelle-List] Oil pressure > > FWIW high oil pressure isn't going to hurt you as bad as high volume. A > high volume oil pump will almost always pump a 5 quart oil pan dry at the > end a a quater mile under WOT. I have found this out the hard way at t he > track. That why most drag racers that run a high pressure- high volume pump > have a seven or eight quart oil pan. Just my 2 cents, Vernon > ----- Original Message ----- > From: "396guy" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Saturday, July 20, 2002 5:27 PM > Subject: [Chevelle-List] Oil pressure > > > > Mine carries around 15-20 at idle when hot but comes back up to 35- 45 when > > cruising again. I'd only worry if it drops to 5- 10 and is slow to come > > back. I've heard the rule-of- thumb of 10lbs per 1000 rpm as well but only > > up to a point of course. Depending on engine conditions of course, but > I've > > heard anything over 50-60 lbs will blow oil by the bearings and not > > lubricate properly. Might be an old wife's tale, but you can have t oo > much > > of a good thing. > > > > Dale McIntosh > > ACES #1709/TC #92 Gold > > 67 SS/67 Elky > > http://www.dalesplace.com > > http://www.team67.com > > http://www.midwestchevelles.com > > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] > > > [mailto:[EMAIL PROTECTED]] On Behalf Of Brenna Olwine > > > Sent: Saturday, July 20, 2002 2:44 PM > > > To: [EMAIL PROTECTED] > > > Subject: RE: [Chevelle-List] Header help > > > > > > > > > On a better subject... > > > Does anyone know what normal oil pressure should be when the car i s hot > > > and at idle? > > > Brenna > > > 1967 327 Malibu > > > > > > > > > > > > ----------------------------------------------------- > > To Unsubscribe please visit www.chevelles.net/list.html > > To start a new topic, send mail to: [EMAIL PROTECTED] > > > ----------------------------------------------------- > To Unsubscribe please visit www.chevelles.net/list.html > To start a new topic, send mail to: [EMAIL PROTECTED] > ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
