As everyone can see, this is not what a combustion chamber should look like.

Can someone tell me if it is repairable? Or is it worth just scrapping the head and keeping the parts.

 

I would probably need some welding and machining. Best bet is to talk to who you would be having attempt the repair, see what it'll cost.

 

Who would even be able to do it? An average machine shop? Or do you know of a shop?

 

Its not pretty but its on the inside. If not cracked, I'd be tempted to buff out the sharp edges and run it.

 

You can send the picture to Jackson machine or another machine shop familer with Evo's.

 

ive seen much much worse repaired, the real question is will it cost more to repair then simply replacing it.

 

That's kind of what I was getting at with finding out the cost lol. Anyone can weld the chamber up and machine it back out. But you may be better off finding a god used blank head for 500-800 lol

 

Ive got a spare stock head, perfect shape. But this one is already port and polished. And the cylinders have been oringed. So its tempting. There is a shop called Midwest Cylinder Heads that says they can fix it for 550 with reinstalling valve train plus an extra 200 to regroove the orings and install the wire. Is that worth it? Keep in mind they are in Iowa (i think) and I am in Virginia so shipping is costly too.

 

How much hp does a port and polish really add? As much as I would like to have that again, I am really debating on just swapping everything to the stock head. And are the orings really necessary for less the 35 lbs of boost?

 

With two heads you have the choice of doing what you want. But, other than possible hot spots which can be polished out, I'm still waiting for someone to explain what this finish is going cause to happen. I'm old enough to remember when they started advertising completely machined combustion chambers. The main reason for that was to have them all the same approximate size.

 

I sure as hell wouldnt run it without it being welded, then grinded. Is 600-700 capable of being reached easily without the port work

 

What happened first, head gasket leak or broken valve train? That's not bad, going to depend on how sharp the corners are on the indentations-hence the previous question. I would smooth it all down removing as little material as possible with a dremel or grinder and go from there. To weld that's going to be a pretty penny and then you grind the weld down. Looks to me like you where just beginning to beat the hell out of the chamber.. smooth it out some and run it.

 

Ill have to look a little closer. But the problem with it is that it had no compression.

 

No compression = blown head gasket, bent valves and or bad rings....or all of the above. Kinda looks like it ate something. Have it magnafluxed and valves check for seal--then determine what you want to do about the combustion chamber.

 

Yes it ate a washer that the guy who built the head left in it, unfortunately my mistake for not looking it over more througholy. The crank was a brand new Manley so does that need magnafluxed?