Hey thanks for the comments Grapevine. I'm hoping this BMW thing works out. lol
I pulled the pistons and rods out of the first engine today. I have many questions for the compd family.
First off is the rods. Keep in mind, this poor little engine will probably be pushed to failure, but, I would like to give it every opportunity to make some big power before this happens. Take a look at the pics and let me know if you think these rods will be the week link. Carrillo makes H-beam rods for the 3L Mercedes and they are incredibly light compared to the stock rods. I could probably have a set made if the general consensus is that it needs to have them. This is the first time I've ever messed with rods where the caps were broken off. Before breaking the cap bolts loose, you couldn't tell where the cap ended and rod began.
The next question, should I have the engine/head fire ringed, o-ringed, or just leave as-is. Keep in mind, this is aluminum head to aluminum block. The factory head gasket is a 3 layer laminate with the middle layer about twice as thick as the outer two. This normally would be a no brainer, however, two variables may make either a fire ring or O-ring impossible. First variable is that this is the only head gasket that may be available. So, if a fire ring is necessary, would I simply cut out the part of the head gasket next to the cylinder walls? Would simply o-ringing the head work with the laminated style gasket? The second variable is the minimum amount of space between the bores. Have a look at the pic and see what ya think. Also, just as a general question, if the Fire or O-ring is feasible, would the ring be placed outside the steel sleeve or directly on the sleeve?
Last question for this post. The block is all cast aluminum. I had to do some cutting and grinding on it a little and I can tell ya this stuff is harder than your typical aluminum. I was even able to file on it without the material filling up the file. Anyhow, take a look at the pic. The crankcase is deep skirted which will allow for a girdle if necessary. So, what do you all think? Should I build a girdle to tie all the main caps together? If so, what thickness would be necessary? Naturally, the thicker the better in this situation, however, keeping weight in mind, would something like a 1/4" girdle aid enough in the bottom end to break other parts or do I even need a girdle???
I thought I'd post up a few pics of the pistons before sending them off to Big Blue 24. They are Mahle and appear to already have some sort of coating on the skirts.