E-85 555 buildup- drag race by Jim Weise

3 minute(s) of a 87 minute read

6-5-2011

After machining..

Machining requirements on this block

Bored to 4.500.. we tested the hone with and without a deck plate, and found that the block pulled less than .0005. I will do these in the future, even to this bore size, without a plate, with no worries. Saves Money and time..

We o-ringed the sleeves, and used just a .010 over the sleeve stick out for the wire, and did not put a reciever groove in the head. Basically what we did forever with the iron block, and at this compression level (12.75-1) naturally aspirated, I felt the money invested in reciever grooves would be wasted.

Deck height was 10.570 +/- .001- We did not deck this block, as the Sleeves were .002-.003 above the block surface, which is desirable, to let the block grow up around the sleeves. If I had to deck the block, I would have removed all the sleeves, and decked it, and re-installed the sleeves, to maintain this critical dimensional interaction between the block and the sleeves. I was very happy not to have to do this..  

Main housings were .0002 under low limit.. we left them there. Only a light deburing was required on the main caps. With standard main bearings, and the crank at just under low limit, main clearance was .0022, which is in the range I want for an alum block. .0018 to .0022 was our goal, as when this thing warms up, main clearnance will be up past .004.

Lifter bore placement, angle and size was right on the money, finish of the lifters bores was exceptional. No work was required.

So in short, take it out of the box, and bore and 0-ring it. We did spend considerable time and money checking everything, as we had no history with this piece.

JW