67mustang302

You apperantlyneither understand physics nor the internal workings of a pushrod engine. As far as the valvetrain, the lifters have metering controls built into them, they restrict oil to the upper end of the engine so the valvetrain doesn't get flooded, just like a bearing it only has so much of an opening the oil can go through. The ONLY way to get more oil to the valvetrain without modifying it, is to run more oil pressure. Same thing with bearing clearances, the space only allows a given volume of oil to flow through it under a certain pressue. A high volume STANDARD PRESSURE pump will not move more oil through the engine than the clearances and metering channels in the lifters will allow. A high volume HIGH PRESSURE pump will, because the resistance through the clearances is the same, but there's higher pressure to overcome the resistance and move more oil.

The reason that pans get run dry at high rpm is because the centripetal force of the crankshaftrotation throws the oil out from the bearings and has a net resistance lowering effect on the oiling system, allowing more oil to be pumped. If you're turning high rpm then you need to make sure you're getting proper oil return and have the necessary volume to compensate for the engine speed, but the pan isn't getting sucked dry simplybecause high volume pumps move more oil. If you had good bearing clearances you could get a stock pump to suck a stock pan dry at over 6,000rpm

86stanglx

well on the pump, its a melling high volume and its been a year since i put the engine together to remember if its standard volume or not. im almost positive it is because i bought it when i used to work at oreilly's and it was on the shelf. i dought i will be turning much of 6000 anyways

mattdel

lets just put it this way, no matter what setup you have.

its never a bad idea to have too much oil "on demand", meaning extra capacity.
too much oil pumped through the system isn't the best idea, but it never hurts to have "reserves".

OnyxCobra

So far i've been fine with the stock pan and melling high volume pump. All i had to do for clearance was switch one of the bolts on the bottom of the pump.

86stanglx

ok then what about the windage tray and main cap girdle?

my77stang

5 quart pan + windage tray + high PRESSURE pump, not a HV pump = sustained 6500 rpm stints for like 5 minutes at a time and i never had an oil related problem

ahhh...... the sound of a high compression motor with a long duration cam screaming along at those speeds is music to my ears

67mustang302

I'm running a stock replacement pan with 6qt capacity and a Melling high volume pump, it'll go out to almost 7,000rpm with a single problem. Windage trays don't really matter muchunless you turn high rpm - at which point they start to make a difference, but a baffled pan is definately what you want. A windage tray certainly won't hurt if you have the money.

As far as high volume pumps, that and a large capacity pan is good insurance, even after a crapload of miles and the bearings wear, you still have oil pressure(high pressure pumps do that as well). You might lose a couple hp from trying to pump more oil, but it's better to pump more oil than you need, than to need more oil than you pump

luckythirteen13

a 7 quart pan is a smart idea because the more oil in the pan, the longer it will stay there before it gets sucked into the pump. time in the pan is cooling time so more oil means cooler oil. thats why people buy larger pans for their tranny's and for their rear diff covers

tinman

NHRA stock elimintor 5.0's HAVE to use the stock pan, best ones are deep into the 10's.
If they get away with that, you can too.......