Re: Sows Ear Chassis
Posted: Sun Apr 22, 2012 11:36 am
continued
The weather turned cold and rainy this morning but before it started I got to look at the head a bit just to see what the thickness of it was. when I pulled it I just looked at the core plug in the deck face and it had been surfaced so I figured it was a bit on the thin side. It had me worried and I just wanted to know if there was anything at all beside the front cover that could be salvaged. My tools suck and I don't have a micrometer that goes to 5 (let alone 3 or 4 inches) so I used a machinists scale and I cant read one anyway but I took about 10 photos of it and got 4 9/16 which is 4.5625 or .0375 under what a stock sprint is. My guess is it will work if I can get away with one more light skim and it will need one. The first picture is as pulled taken just after I brought it home and it still has the head gasket on it, Friday I pulled it off and cleaned the head face with acetone and had a good look (but no photos) and number two under that nasty brown goo has some issues in that the face is etched right around the fire ring. I guess if its really bad I'll have to get it welded as to go much below 4.54 inch thickness is just not what I want to do. It just limits things too much in that its tough to take compression out of it. This also limits how big you can make the Twin Cam. I was not planning on a big engine with this head but the block will need a bore (if I use the one it's been on since I bought it in 1976) my gut tells me a stock bore would be best for this head but maybe I can get JE to do a total flat top without any intruder at all (just valve pockets) and get some compression out of it. I'm just trying to keep compression ratio under 10.5 static. Looking at the exhaust valves I am thinking valves, valve seats, guides and probably tappet sleeves. Its starting to make my wallet bleed and I haven't even got the head a part yet .
The weather turned cold and rainy this morning but before it started I got to look at the head a bit just to see what the thickness of it was. when I pulled it I just looked at the core plug in the deck face and it had been surfaced so I figured it was a bit on the thin side. It had me worried and I just wanted to know if there was anything at all beside the front cover that could be salvaged. My tools suck and I don't have a micrometer that goes to 5 (let alone 3 or 4 inches) so I used a machinists scale and I cant read one anyway but I took about 10 photos of it and got 4 9/16 which is 4.5625 or .0375 under what a stock sprint is. My guess is it will work if I can get away with one more light skim and it will need one. The first picture is as pulled taken just after I brought it home and it still has the head gasket on it, Friday I pulled it off and cleaned the head face with acetone and had a good look (but no photos) and number two under that nasty brown goo has some issues in that the face is etched right around the fire ring. I guess if its really bad I'll have to get it welded as to go much below 4.54 inch thickness is just not what I want to do. It just limits things too much in that its tough to take compression out of it. This also limits how big you can make the Twin Cam. I was not planning on a big engine with this head but the block will need a bore (if I use the one it's been on since I bought it in 1976) my gut tells me a stock bore would be best for this head but maybe I can get JE to do a total flat top without any intruder at all (just valve pockets) and get some compression out of it. I'm just trying to keep compression ratio under 10.5 static. Looking at the exhaust valves I am thinking valves, valve seats, guides and probably tappet sleeves. Its starting to make my wallet bleed and I haven't even got the head a part yet .