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Title: what is a 'reasonable' deck height Post by: nicolas on November 13, 2010, 15:26:10 pm i want to know what is a good or accepted as reasonable deck height in an engine?
my engine spec is 82x94. heads are 58cc and have a step in them. and without shims i have a deckheight of 0.52mm now. so with a shim tha measures 1mm (or a 0.040) i would end up with my desired CR of 9 to 9.4 is this OK or do i need more? can i get away with less? Title: Re: what is a 'reasonable' deck height Post by: Peter on November 13, 2010, 17:09:30 pm with good parts 0.040 should be OK,
thats what i wanted to do when i still wanted to keep my engine NA Title: Re: what is a 'reasonable' deck height Post by: Jo Clifford on November 13, 2010, 18:10:41 pm i want to know what is a good or accepted as reasonable deck height in an engine? my engine spec is 82x94. heads are 58cc and have a step in them. and without shims i have a deckheight of 0.52mm now. so with a shim tha measures 1mm (or a 0.040) i would end up with my desired CR of 9 to 9.4 is this OK or do i need more? can i get away with less? Yes,that is ok :) Jo Title: Re: what is a 'reasonable' deck height Post by: nicolas on November 14, 2010, 18:35:07 pm with good parts 0.040 should be OK, thats what i wanted to do when i still wanted to keep my engine NA i want to know what is a good or accepted as reasonable deck height in an engine? my engine spec is 82x94. heads are 58cc and have a step in them. and without shims i have a deckheight of 0.52mm now. so with a shim tha measures 1mm (or a 0.040) i would end up with my desired CR of 9 to 9.4 is this OK or do i need more? can i get away with less? Yes,that is ok :) Jo thanks honeys ;) Title: Re: what is a 'reasonable' deck height Post by: Jesse/DVK on November 15, 2010, 20:35:10 pm Rule of thumb is minimum 1mm but max 1.5mm to get enough squish.
How much is the step? You should add that to to your deck height. Title: Re: what is a 'reasonable' deck height Post by: nicolas on November 16, 2010, 11:39:01 am Rule of thumb is minimum 1mm but max 1.5mm to get enough squish. How much is the step? You should add that to to your deck height. not sure if i can add the step to my deckheight. i don't want the piston hitting the step or so. i prefer to keep my pistons IN the cylinders for now. ;) but i do understand what you are saying. |