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finally i have decided to try to increase compression ratio on my v1 uni and by the calculation and assumin the metal i m going to remove will result in volume change which would be equal to volume of cyllindrical shape of radius [bore\2] and length that i removed \ shaved from block .
for 9.6 : 1 compression ratio the length i should remove came out to be .4 mm
it is like
SV = pi*(57.3\2)^2*57.8*(1/1000) = 149.05 cc
default CR 9.1:1
so CV = SV \ (9.1 - 1) = 18.4 cc
now if i remove 0.4 mm from the block
volume change = pi*(57.3\2)^2*0.4 *(1/1000) = 1.03 cc
new CV = 18.4 - 1.03 cc = 17.37
hence new CR
(149.05/17.37)+1 = 9.58 : 1
should i go ahead any other adjustment required?????
and how much can i increase CR without worrying abt any thing!! max value??????
UPDATE 1:Compression ratio mod is complete , sattled for 10.1:1
for 9.6 : 1 compression ratio the length i should remove came out to be .4 mm
it is like
SV = pi*(57.3\2)^2*57.8*(1/1000) = 149.05 cc
default CR 9.1:1
so CV = SV \ (9.1 - 1) = 18.4 cc
now if i remove 0.4 mm from the block
volume change = pi*(57.3\2)^2*0.4 *(1/1000) = 1.03 cc
new CV = 18.4 - 1.03 cc = 17.37
hence new CR
(149.05/17.37)+1 = 9.58 : 1
should i go ahead any other adjustment required?????
and how much can i increase CR without worrying abt any thing!! max value??????
UPDATE 1:Compression ratio mod is complete , sattled for 10.1:1
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kis CR k baad..
If knocking occurs again use double head gasket or high octane fuel.
, he charging 250 Rs for 1 shaving!! then i need to take iterations and so consider total amt spent too .. more over if some bad happens then i'll have buy new head , which i want to avoid at all the cost!!
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