Hot Rods 292 Turbo Six HELP

Need help. Just finished building a 292 Turbo Six. Runs great, but I cant control the oil pushing out the breather on the Offy valve cover. Do I need more breathers????? It is very frustrating. It has only one breather.

thanks,

Scott

 

Would like to see a photo, but any blown motor is going to make a fair amount of blow by past the rings. You need a puke can to catch the oil mist. A hose off the valve cover to a catch tank, the tank should have a vent with a filter, like a small K&N type on it. Drain it as needed. If you want to buy one, look at summit or jegs.

 

I like to vent engines from the crankcase. Maybe using the fuel pump hole if you are not using the mechanical unit. Run a #10 or 12 line up to a vent can with a breather Higher than the port on the engine. This allows the oil to condense and flow back into the engine and still lets the engine breath without filling a can with oil that you have to dump or drain. You can even fashion one coming off the side cover. It needs to go up hill so the oil will flow back into the engine and the hose needs to be big enough to not have high velosity air carrying oil. Works on all my racecars. Been doing it for years. Top of the fire wall is a good spot and will look cool if you use fancy line and nifty can.

 

Try a stock valve cover, they have a pretty good baffle setup in them.

 

Thank you. I will send pics today.

 

Vacuum pump maybe made from a Ford smog pump.

You didn't use gapless rings did you.

 

Here are the pics. You can see what we have done so far, but the fins on the valve cover fill up with oil pretty quick.

 

We did put a oil catcher on the side of the block where the mechanical fuel pump would go to relieve pressure, but still wants to come out the breather on the valve cover.

 

no gapless rings

 

If the breather is between cylinders so it will clear the rocker arms, you migth be able to put a factory stamped baffle inside the cover, jb weld it in place or something.

Seriously.... you need a good baffle, and offy covers are notorious for not having any.

 

We put a stamped baffle inside the valve cover and even put a tube in there. Should I put a couple of breathers on the side of the valve cover? Thanks.

 

I gotta say, that is a super clean setup! No wonder you don't want any oil drips. Nice work!



What are the details on the car?

 

I know that someone is going to say that I am wrong but I have never built a huffed motor without gapless rings.

I don't know what kind of boost you are running but I would probably put a vacuum pump on it if it were mine. hell my buddies little factory turbo banger ford has one.

 

I will double check with the builder in the gapless rings deal. I'm using only 6-7 pounds boost.

 

Wow, glad I asked you for pictures, just *****in. Aint a inline guy, but it doesnt matter, beautiful work sir. We run a twin turbo outlaw 10.5 car, twin 88s. Vacuum pumps are useless at a certain boost level, they cant keep up, even the big moroso, plus the pump still needs a puke tank. Given the detail you put into this, Id plumb a -10 line from the valve cover to a nice polished catch tank, at least a quart size. Its only getting oil under boost, shouldnt be a big pain to deal with. They do need to be drained and need a breather. We run 35 lbs, and fill two quarts in under 7 seconds. I drive a ford lightning every day, makes 8 to 10 lbs, and had to redo the factory pcv set up. These fill the intake hose in front of the throttle body with blow by oil under boost. Even the factory screwed this up. I ran two long hoses from the valve covers down under the truck, and just let it breath. Like an old road tube. If you dont mind a little oil smell, you could try this also.

 

Depending on static compression it is still enough to blow past the rings and make crank case pressure. I am no doubt absolutely wrong about my ring choice I was just taught that any huffed engine needed gapless rings as well as O ringing etc.

6-7 pounds is actually pretty hefty for this crowd. A lot of these fellas are happy as a duck in mud with 3 pounds.

I guy I ran around with in the '70s had a blown 292, his dad built it for him. Manifold, converted 371, drives the whole 27 ft (9 yards for those who don't have a calculater). He ran a pair of moon 90 degree breathers just below the pan rail. His dad said it was the only correct way to do it.

I thought I was pretty sharp back then, but his dad was an Ace, to this day I think he had forgotten more than I will ever know.

By the way, I have been rude to you. That is one beautiful engine. Very well layed out.

 

Im with ****** and check on those rings. I dont know the miles or if ur builder is good with setting stuff up for boost. Try a leak down test to see what shape the rings are in.

thats all I can think of right now. im not a pro, but i know a thing or two about boost.

 

Thanks for all the feedback. I will have to try a few things.

 

Did a leakdown test. All is good there....

 

In the next few days I will give you guys a few details on the car.