Cab I removed the idle circuit ball, and the cruise circuit spring. Vacuum closes the cruise ball, and can only flow through the idle side. When CC goes positive, the valve can fully vent into the aircleaner.

I did it with the Wagner adjustable PCV. It works really good.
You have a PM

Heres pics of my setup

Not sure if I completely understand what you have here. Is that a "normal" breather in the top picture ? Bottom picture shows (2) adjustable pvc valves ? thanks for sharing this.

The top pic is the driver side, and the vent is from the 70s. The original elbow was causing oil to weep at the grommet, and the new vent solved that.

The hose goes to the air intake tube, and thats where I cut in the 2nd valve.

Bottom pic is the PS to show how that 2nd valve is setup. I'm still tinkering with it though cause I think 1 valve should work.

Does the hose from the PVC on the valve cover go to a port on the intake ? Is there a particular rpm range you're trying to get this to work at. IIRC, some stock eliminator guys did some type of trick like this.....which I'd like to know about

I had issues on my old street pump gas 518 C.I. 400 stroker motor with the original six pack blowing oil out of the breather caps with two caps and one PVC valve when I raced it shifting at or above 7000 RPM, I added another PVC valve with a T to the vacuum side and that stop the problem That also made the motor idle better which allowed me to lean down the idle mixture screws on all three carbs. a tiny bit

The VC PVC hooks to a port on the manifold, near the plenum floor. Its kinda cluttered, and hard to get a clear pic.

I have no idea what it's done power wise. A lot of dyno time would be needed. Next spring I intend to go to the track and test this setup out.

I'm guessing this will mainly affect 60 foot time.

Cab these Wagner valves are really impressive because they manage the vacuum signal so well. I'm convinced a lot of carb idle issues are caused by PCVs not metering correctly.

Have the new grind from Comp for this engine. They stepped it up with some new QRI and HXX HL lobes so now it is very aggressive. They also sent me some new dual conical springs to try. These springs are pretty trick. They are lightweight and they don't have the friction of an interference fit damper. I'll get the new parts installed on the 470 and back up on the dyno within the next few weeks. Should be interesting.

Andy,are the retainers Ti or tool steel and do you know the gram weight? Thanks

Oh boy, conical springs A big no no here



Those springs are very nice 👍🇺🇸

The retainers I have are tool steel. Comp has Ti retainers for these springs but didn't think they were needed for my combo. This engine only spins to 7000.

The conical springs save about 1 pound of weight over the existing dual springs. Also, the conical springs get rid of the interference fit damper. The damper in my existing springs is showing a clear wear pattern after just a few dyno pulls. Those wear marks took power to make and the ground up steel went into the oil system.....

Not only do they save weight, they also help cancel valve train harmonics, require less pressure to control the valves than traditional duel springs and are made from better material.

Yep, I'm looking forward to this round of dyno testing just to see if the new cam design and the new springs make any difference. I'm hoping we'll pick up 10 or 15 hp but it might not be that big of a difference.

Andy, I loved the comment that the wear marks on the valve springs took energy to make. Wow!

Folks, if you're pondering how AndyF makes power, it's because of understanding things like this.

Conical springs? It just freaks me out how the Spintron has pushed the understanding of valve train dynamics.
Years ago Isky made a spring for smallblock Chevies that had a small end to fit in the spring pockets, and then ballooned out to 1.55or so for the rest of the way up to the retainer. They were beehive springs, but they were upside down.

BTW I need one new Isky 2005 valve spring to round out a set.

R.

Along with taking power to make the witness marks, it created HEAT in the valve train.
Andy this should be an interesting test!
Thanks for your info!
Don

Andy do you have part #s for the springs? Do they have them for solid flat tappets also?
Thanks, Don

The springs I'm using are 7245. Comp has a variety of these dual conical springs in their new catalog. Shouldn't be a problem finding a set that would work with a flat tappet cam.

Try this link. This isn't all of the conical springs but it might get you going.

http://www.compperformancegroupstores.co...ory_Code=SPRNGC

Thanks.