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17-Mar-00 Correcting the Lifter Placement Part 2

Correcting the Lifter Placement Part 2



ImageOne thing I found interesting was the fact that the lifter holes are not in perfect alignment with the cylinders on a small block Chevy. In this picture you might be able to see that the lifters are a few degrees different than the cylinders. I had thought that if you were to put a straight edge across the head surface of the block that the lifter holes would fall at 90 degrees… not so. Humnn… I learn something new every day.
ImageOnce the bores are enlarged and bored perfectly straight (less than .0005 of an inch variation) a brass insert is pressed in the newly bored hole. The special brass inserts are about .0015 of an inch too small after they are driven in.
ImageScott added a couple drops of Locktite to each one before installing it just for extra piece of mind. I doubt it's really necessary, but when you're this far, why not?
ImageNext Sehr bored the new brass sleeves close to size and will hone them smooth later. The next step is to re-drill the oil galley. I will cover this whole procedure (as always) with text and pictures soon.
ImageSo you're wondering how much this costs aren't you? All I can say is I've spent more for less HP before. At this writing (3-17-00) Sehr is only charging about $500 for this. His price includes lifter bushings, etc. but you will want to contact him for more details. I think Sehr Performance is one of the first engine builders offering this to your average street rodder. This is usually only done by your NASCAR – type, high dollar engine builders. If you could get them to do this for you it might run you 1k or more, so this is a deal.
ImageI've always built my own motors. This is a first for me having someone else do it and I'm glad I did. This guy knows his stuff. Oh, by the way, I think I need an air bench! It's way cool! You can step on a pedal and float the block (or whatever) around on a cushion of air. I know this is nothing new to engine builders but I still thought it was slick.