I did an early HS50 .020 over bore for another member last week and I feel it came out pretty great actually. It was the first bore this large that I have done as of yet and I have to use different stones than I have been using due to size and the rough cut stones are aftermarket so I was not sure how things would turn out so I was pretty happy. Few days later I spot a .010 over assembly on ebay (2 actually, bought the pair and then got a refund for one right away as they messed up how many they had ) which arrived yesterday while I was painting another engine.
Feeling big headed and cocky since the other one I just did came out better than I thought I grabbed a block I have had thats a little out of round and running a bit fat in the bore thats been sitting in a box for a few years. Start cuttin', rough cut stones got a little grabby at one point and the felts that keep the cutter centered suck on the aftermarket brand and made it hard to work with. so when I got to my target area to switch and use the fine cut stones I still had a little gouge visible after the final cut/run. It was down past the rings on the downstroke so It probably would have been a non issue. But, Thankfully I did have an alternative, so I started over and took a mulligan .....
Kind of interesting, The .020 I had in stock that another member hooked me up with a few years back has the long skirt with the notched sides, The later made (but still early large bore/offset pinned) ones they deleted the skirts. The .020 that was sent in last week was a shorty as well like the .010 is on the right. the funny thing is I scanned right over the .010 on ebay awhile back becuase I thought it was for another engine due to it not having the skirts!
2nd time around I took the aftermarket felts threw them across the shop and grabbed a set of genuine ammco's and just worked them in to fit with the stones, It works better but I am gonna keep my eyes open for set of genuine in that size.
Now this block is ready for the valve seat recuts, port cleanout, surface truing......and a new lease on life!
Feeling big headed and cocky since the other one I just did came out better than I thought I grabbed a block I have had thats a little out of round and running a bit fat in the bore thats been sitting in a box for a few years. Start cuttin', rough cut stones got a little grabby at one point and the felts that keep the cutter centered suck on the aftermarket brand and made it hard to work with. so when I got to my target area to switch and use the fine cut stones I still had a little gouge visible after the final cut/run. It was down past the rings on the downstroke so It probably would have been a non issue. But, Thankfully I did have an alternative, so I started over and took a mulligan .....
Kind of interesting, The .020 I had in stock that another member hooked me up with a few years back has the long skirt with the notched sides, The later made (but still early large bore/offset pinned) ones they deleted the skirts. The .020 that was sent in last week was a shorty as well like the .010 is on the right. the funny thing is I scanned right over the .010 on ebay awhile back becuase I thought it was for another engine due to it not having the skirts!
2nd time around I took the aftermarket felts threw them across the shop and grabbed a set of genuine ammco's and just worked them in to fit with the stones, It works better but I am gonna keep my eyes open for set of genuine in that size.
Now this block is ready for the valve seat recuts, port cleanout, surface truing......and a new lease on life!