Robwhartlt1

Hey guys I just wanted to find out my heads have cnc stamped on them dose anyone know what that means.

96capricemgr

Probably done by a company names CNC Cylinder Heads

http://www.cncheads.com/corporate/corporate5.htm

I know years ago they were well thought of. Haven't seen any meaningful results from them in a long time though so no idea if they kept up the LT1 R&D.

Stl94LT1

I'm running CNC Cylinder Heads ported LT1 heads. They work pretty well in my Y-body. Pete from CNC preached port velocity over peak flow numbers. They seem to work real well for a street/strip head. Last I heard CNC was out of business.

Robwhartlt1

so are they stock heads or after market heads how do i know.

Stl94LT1

CNC ported stock heads. If your car is trapping 116 mph with a Crane 227 cam. The heads must be working pretty well.

Robwhartlt1

how much lift dose that cam have pple told me its a baby cam is this true

Robwhartlt1

and what do you think i should sell the heads for

Stl94LT1

About 6 or 8 years ago I paid $1500+cores for my CNC Heads. At the time they were one of the top porting services. But, in the last few years LE, AI, and a few others have taken LTx head porting to a whole new level. I would think if the heads are still in great shape you might get half of the original price.

Robwhartlt1

How do I find out what they were porter to

Injuneer

You would have to have them flow tested on a head flow bench. Or you would have to find the flow results done after the original porting.

Where on the head is the "CNC" stamp located? I have a set of LT4's from CNC Cylinder Heads, and never noticed the stamp. But if you tell me where it is located, I'll look and see if mine have it.

Robwhartlt1

Give me your email and I will send you a pic

Injuneer

Left click on the screen name in my post, and it will give you the option of sending me an e-mail or a Private Message.

pineapplesink6

If u want, I know a guy selling LTx AFR Eliminators. Let me know if your interested!