adamsmith89 Posted December 9, 2015 Share Posted December 9, 2015 (edited) Any help with this please guys upload images free online photo sharing I just need to work out the ring gap block has been rebored to 74.5mm bigger size direct links http://s18.postimg.org/cap4sm0qx/20151209_001801.jpg http://s18.postimg.org/4tfxdeb7t/20151209_001815.jpg Edited December 9, 2015 by adamsmith89 Quote Link to post Share on other sites
adamsmith89 Posted December 9, 2015 Author Share Posted December 9, 2015 Basically just need help to what size I need the rings to be and what size feeler gauge to use Quote Link to post Share on other sites
Rob H@RCH Engineering Posted December 9, 2015 Share Posted December 9, 2015 To mesure the ring gap you need to put the rings in the block (with out the piston) and mesure the gap in the ring with the feeler gauges to see if the gap is the correct size, its not realy a job you can do with just a file, its a specialist job realy and should be done by the machine shop when the do the boring Quote Link to post Share on other sites
Rob H@RCH Engineering Posted December 9, 2015 Share Posted December 9, 2015 If you make the gaps too big you will get blowby, too small and the rings will get tight as the engine gets hot. Quote Link to post Share on other sites
adamsmith89 Posted December 9, 2015 Author Share Posted December 9, 2015 I have a ring file and feeler gauges I'm just not sure how to work out the sizes I need Quote Link to post Share on other sites
glanzagee Posted December 9, 2015 Share Posted December 9, 2015 Basically just need help to what size I need the rings to be and what size feeler gauge to useThe instructions you have posted above says it all ?What your asking is dependent on what your using the car for P.s I hope you have the correct tool too file the rings ! And know how too use it ! Quote Link to post Share on other sites
morgey Posted December 9, 2015 Share Posted December 9, 2015 From what i can work out, Top ring gap = 0.0157" or (0.39mm)2nd ring gap = 0.0186" or (0.47mm) So if my understanding is correct.Thats 74.5 x 0.03937 to give you the imperial bore diameter of 2.933065.Top ring, you times that by the first figure. 2.933065 x 0.004 = 0.01173226 Im assuming Its boosted? Its under 0.015 gap so add 0.004 To give you 0.0157" rounded up. You then repeat that for the 2nd ring but the gap multiplication is now by 0.005 Quote Link to post Share on other sites
fiddlersport Posted December 9, 2015 Share Posted December 9, 2015 take it to a reputable machine shop dude Quote Link to post Share on other sites
adamsmith89 Posted December 16, 2015 Author Share Posted December 16, 2015 Thanks for your help guys all sorted I had it gapped at the machine shop Quote Link to post Share on other sites
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