Hello all!

I found some after-market aluminum heads that were originally 23°, but were "rolled" to 21°. Any cons associate with this rolling process? The seller also said that one needs to buy 0.060" thick intake gaskets.

Any body hear of this?

 

Run away. Run far. Run fast. You do NOT want to get involved with something modified in this way. This has trouble written all over it.

 

I don't know why you say that at all. It actually gives a straighter intake shot to the back of the valve.

The heads were angle milled, probably to make a smaller combustion chamber. I'd check that first to make that its not way to small to run. If it checks out fine, you will have to have the intake manifold milled to match the new angle of the heads.

It really depends upon if they will work on your motor (compression ratio) and how much you want to spend for them to work.

 

I was looking at those brodix heads too. I dunno man..

-- Joe

 

There's nothing inherently "wrong" with angle-milling a set of heads; but, if you have to ask, it's probably not for you.

Most likely somebody was trying to get the compression up as high as possible.

Angle-milling creates all sorts of situations with sealing things, and sometimes with hardware. It causes difficulty with the head bolts or studs specifically.... keep in mind, that the holes through the heads where they go, are now also 2° away (bent) from where they used to be.

I'd say, it doesn't sound like the right set of heads for you.

 

I don't think the intake bolts would be that big of deal, but the head bolts are starting to make me balk. To get the 21° angle, 0.020" must be taken off the spark plug side. That means the head bolts will be off by 0.010" (at the head) and the seating surface for the bolts might not have been spot faced to the deck of the cylinder head.

Starting to see why the seller is selling them.

Thanks for the warning!

 

Passed on 'em. Thanks for the info...

http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT