baorevo Posted September 15, 2013 Share Posted September 15, 2013 A little vid showing how to check the squish on our 1/5 engines Quote Link to comment Share on other sites More sharing options...
saviown Posted September 16, 2013 Share Posted September 16, 2013 also works on glow engines, dave marles from Prestwich models told me this trick years ago when I was doing boats Quote Link to comment Share on other sites More sharing options...
Jacksprogis Posted October 9, 2013 Share Posted October 9, 2013 Video isn't working for me Jack Quote Link to comment Share on other sites More sharing options...
Anthoop Posted October 10, 2013 Share Posted October 10, 2013 Maybe worth mentioning to position the solder above the gudgeon pin for accuracy (doing both sides and taking the average and measuring with micrometer for best accuracy)....if you put the solder in other positions then the reading will not be so accurate due to the piston rocking. Quote Link to comment Share on other sites More sharing options...
norney hurtmore Posted November 25, 2013 Share Posted November 25, 2013 more accurate way is with the depth guage on a vernier before assembling engine, slide piston as far as it will go into head (without piston ring fitted) measure with vernier assemble engine wind piston to TDC and remeasure subtract original measurement = squish Quote Link to comment Share on other sites More sharing options...
wolfie1 Posted November 25, 2013 Share Posted November 25, 2013 You know in all my years i have never done this before when rebuilding an engine, so whats it for? Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted November 26, 2013 Share Posted November 26, 2013 It's for making sure the squish is correct, if I understand it correctly, too much (too low of a number) will give you more bottom end power, but pretty much ruin the engine, and not enough (too high of a number) will lose compression and power? If I remember correctly about 0.55-0.65mm is best. I could be wrong but pretty sure. Quote Link to comment Share on other sites More sharing options...
wolfie1 Posted November 26, 2013 Share Posted November 26, 2013 Thanks, so now i do :-) 1 Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted November 26, 2013 Share Posted November 26, 2013 9/10 it'll be fine as long as you change the head to the correct one, but sometimes a 1mm copper gasket is needed with a stuffed crank Quote Link to comment Share on other sites More sharing options...
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