combustion chamber profile for pump petrol road
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- Oil Injector
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combustion chamber profile for pump petrol road
hello, i came across a old cylinder head i did`nt know i had ,but one side has been mullerd by a ring snapping ,my plan is tig it up and chuck it in the lathe and re profile it ,because of distortion if there is anything i can do to both while i`me at it maybe ,then i can do all the welding and skim it , So from a standard head profile is there anything worth changing ,pump petrol road use ?
- JanBros
- Avgas Sniffer
- Posts: 3306
- Joined: Wed Jul 26, 2006 11:50 pm
- Location: the land of Francorchamps
Re: combustion chamber profile for pump petrol road
it all depends a bit on the timings of your engine, and whether you want high power, more midrange, ...
http://users.telenet.be/jannemie/JanBro ... 0Calc.xlsm
squish area 40-50%, high revving engines/power more like 40.
squish height minimum 1% of stroke, but to be on the safe side I use 0.7mm
compression ratio : the higher, the more energ is used to push the piston down, but the less energy that remains for the pipe to do it's work. higher compression = more mid range.
http://users.telenet.be/jannemie/JanBro ... 0Calc.xlsm
squish area 40-50%, high revving engines/power more like 40.
squish height minimum 1% of stroke, but to be on the safe side I use 0.7mm
compression ratio : the higher, the more energ is used to push the piston down, but the less energy that remains for the pipe to do it's work. higher compression = more mid range.
My ultimate goal is to die young as late as possible !