vacuum pump,why pull off valve covers

[Transman]

Pulling through baffles at the front end of each cover with AN10 lines to a tee fitting then AN12 through the Star regulator and on to a 4-vane Moroso pump:

[nyesgym]

yea ,i am going to pull off just 1 valve cover on the front, like you have it. i made a nice baffle on the inside that is just above my stud gurdle. The idea of pulling off the bottom of the motor sounded good, but just way too much oil flowing down there

[hodge]

XXX use the valve cover make a baffle use areomotive has the vacumm releif that mounts beside the pump like one other said this type does not need to let any more air flow through the engine than needed, and you only put 1 bung in 1 valve cover.

we told you



8.64 et 160 mph 500 ci, pump gas, all motor, mopar door car

[Kevin Johnson]

Picture of the baffle? Pan interior? And girdle?

[hodge]

I've found that drawing from the very front you will pick up less oil in the puke tank

[18gullwingdragboat]

Hi. New here.
I have a 14:1 620 BBC in a dragboat I have a vacuum pump on and the oil from the breather on top of the puke tank is driving me crazy.
I use a Moroso pump pulling off the top of front of the valve cover just above #2 cylinder. The tank is mounted to the front of the cylinder head on opposite side. I have a shielded breather to keep wind from pulling oil out at speed.

After a pass I usually have about 4-6 ounces of oil in the tank that needs to be drained.

Using tall sheetmetal valve covers and have T&D shaft rocker setup so I have a little room for a baffle.

Can someone post a pic of their baffle they use or reccomend?

Thanks!
John

[nyesgym]

I made my own baffle, i have a #12 fitting in the end of the valve cover. got a peice of aluminum pipe that fits inside that fitting and as it comes out, i bent it up so it is right against the top of the valve cover, and i flattened it half way so it will clear between the top of my valve cover and the valve stud holder. it is about 3" long. i drilled about 20 -1/16" holes in it. and plugged the end opposite the fitting. at 8000 rpms, i get no oil at all in my catch tank, i idle at 5 oz of vacuum and 11 oz at 7500 rpms, very happy about how this turned out.

[hodge]

perfect glad to hear it

[Star Hg]

U-N-B-E-L-I-E-V-ABLE.
Star Hg

[nyesgym]

hey, i know every racer out there pulls off the valve cover, daa , but i tried something different and it did not work, so, i went with the valve cover. but whats funny, I have tried a bunch of different ways to try to make my car go faster. all the regular racers keep saying, nobody does that, thats stupid. i was told ,you can't port your own heads, well i did, 90% of what i did on my car most everyone said, it will not work, you will not go any faster. Funny thing, i look at these guys cars and they have monster engines and hoses and wires and all kinds of new stuff on their high dollar car. But me, with my little 74 vega with my 383 small block on 110 gas , is running faster all the time. 9.12 @146 and my lastest stupid idea, i will bet will put me at 8.96. so,what can i say guys, if i follow what everyone else is doing, i would be in the 10's, as it is, with my 383 i will hit the 8's. all on home made stuff, working out of my 12' by 12 ' shed, with no heat.

[hodge]

Keep up the good work it's what makes all of us gear heads at heart

[18gullwingdragboat]

Hey! At least you have the balls to try something different instead of following like most others! After breaking a non-billet 4.75 stroke steel crank; I'll learn and do the Sonny Bryant billet this time around! Lessons cost $!!! The proof we learn from our mistakes is in not repeating them!

[hodge]

Hey! At least you have the balls to try something different instead of following like most others! After breaking a non-billet 4.75 stroke steel crank; I'll learn and do the Sonny Bryant billet this time around! Lessons cost $!!! The proof we learn from our mistakes is in not repeating them!

welcome to the forum

[Kevin Johnson]

Hey! At least you have the balls to try something different instead of following like most others! After breaking a non-billet 4.75 stroke steel crank; I'll learn and do the Sonny Bryant billet this time around! Lessons cost $!!! The proof we learn from our mistakes is in not repeating them!

I tend to think that people sometimes give up too easily and follow an easier route.

ok, finally ran car with vacuum pulling off fuel pump block off plate on my SBC. started car and adjusted vacuum to 5 oz at idle and reved to 3500 and i had 10 oz of vacuum, everything seemed fine. idling for about 5 minutes until motor is warmed up. so, i reved the motor to 6000, all of a sudden ,my catch can was FULL of oil and oil came flying out of the air filter on top of the catch can, NO way in hell this will work. even if i tye it into the valve cover it will dump a ton of oil into the valve area, This idea did not work !!!, Now putting the vacuum pull off the valve cover only !!!

At 3500 rpm you are at or are close to a shallow plateau where the pump relief valve kicks in fully and oil flow volume remains fairly constant. This indicates you have a windage problem suspending oil around the crank (3500 vs 6000). Are you at least running a pan rail scraper? What is the design of your old baffle?

I am willing to offer help to you or someone else that wants to experiment. I am assuming the area you used is similar to the core below.

STA72882 cropped.JPG

[hodge]

even if you plug the fuel pump rod hole and rely on the drain hole , that hole is not suficent for air volume to drain the pressure in the engines crank case including cam valley