And I commend you for it. Many thanks
Nice!
Do yourself a favor and check the squish again. Did you check 4 different spots? What are you using to check the squish? The reason that I'm asking, is that if your squish is actually that tight, the fix isn't that simple. Is it the 54mm jug? So, here is the answer if you are getting an accurate measurement. You should (need) to add a little clearance to be safe. You would need to add a paper/cardboard gasket approximately .004 to .008 thou. That would get you in that .020 to .024 thou spot. This isn't an exact science as far as "how much squish do you want". The only exacts are that "you don't want so much that it doesn't run", and "you don't want too little so that the piston smacks into the jug". I'm gonna guess that taking a little off the squish band is beyond your scope (since you are asking the question), and that you haven't put a timing wheel on to check port timing and know which way you "should" go (ie: up on the jug or not). Let's hope that you made a mistake checking it and you have better clearance than you thought. If not, I would make a paper gasket .004 thick and use Threebond 1184 to glue it to the case and then use the metal gasket with 1184 on everything before you tighten it down... .016 is most likely (barely) ok if all other 4 points around the top of the piston are "more" than that, but it is just a tiny bit too tight for me to feel comfortable if it was mine.
Find yourself some paper stock that mics out in the .004 to .008 range. Use a pencil to transfer the top of the case profile and bolt hole locations onto the paper. Cut it out and then use (whatever gasket sealer material you like, I use Threebond 1184) and glue the paper to the top of the case. Coat the other side of the paper and the bottom of the metal (or paper gasket that came with the kit) and stick the gasket on that, put on your piston , put sealer on the top of the metal gasket and bottom of the jug and install the jug. I think if you go to Youtube and search Dominant Saw West Hill Saw House make a gasket, he does a video on it. You also can stack pieces togethet to make a thicker one.
Using multiple gaskets is not something I would do. Can lead to leaks.
Using multiple base gaskets to fine tune squish is common amoungst manufacturers in engine building. Shouldn't be a problem. If you don't want to do it (for whatever reason), find some card stock or gasket material that is around .024 thou and you have the optimal squish that he is looking for.
Wow, that's the tightest squish I have heard of in one of those. Mine was like .035 with no gasket.
All my 56mm have been showing up at .022 with the gasket! Hitting tdc without! Very fun to yank on with the advance.... Not.
