SBC valves

[John Beasaw III]

Ok guys, i need a new set of valves for some heads going on a 10.90 car. The old ones decided they where going to start coming apart while on the shelf. (Thank God). The exhaust valves are snapping below the head of the valve.

Who makes a good "1" piece valve.

Thanks,

John Beasaw

[SlickVic]

I was looking at Ferrea valves. Nice pieces. But im also looking into going to 5/16 over the 11/32 stems. Anyone got an opinion on that?

[Adger Smith]

John,
When you go to buy valves the most important thing is the material being good enough for your application. There are many, grades of Stainless Steel. Some are only good enough to be used in street cars and some cheap SS valves are still 2 piece. You have to be careful. Go to the Manley site. They explain it pretty well. Even when buying from a "Major NAME" company you need to know what you are getting. Most of them sell a low end line just to be cost competitive. You might want to consider working with a good head shop to determine what design valve you need. On my flow bench I've seen flow loss in some applications with the cut down neck (pro flow) valves. I've also seen them increase flow in some applications. Call a couple of the Name brand suppliers and ask what they have for your application. I hope this helps.

[John Beasaw III]

Thanks for the advice. The valves in question are manley severe duty (straight stem), part #11539, +.100 1.60 exhaust.

The heads currently have 2.02/1.60 and changing them to 2.055/1.60 with some bowl work.

Thanks,
John Beasaw

[BillK]

Originally Posted by John Beasaw III

The exhaust valves are snapping below the head of the valve.

John,
I am curious what you mean by this and how they are doing it "sitting on the shelf" ?? Pictures ??

I also have had very good luck with Ferrea's valves.

[SGSST109E]

You can't go wrong with Manley severe duty values. Small block or big.