Maths to work out cc

[Andy Short]

Hi Everyone
I could do with some help working out what cc i will end up at with some different options i have .
option 1
Gen 1 block ,Gen 2 Arrow 71.5 mm crank, Gen 2 rods with 81mm pistons.
option 2
Gen 1 block ,Gen 2 Arrow 71.5 mm crank, Gen 2 rods with 84mm pistons
I have most of the parts to build either ,but the 84 mm barrels will need one pot re-plating.
Any help with the maths would be appreciated.
cheers.

 

[202mphbusa]

COMPRESSION RATIO CALCULATOR

ALL FIELDS MUST BE COMPLETED

wossnerpistons.com

 

[Andy Short]

Thanks for the link , unfortunately i don`t have all that info .
With the 84 mm pistons i think it will be 1585 or there about`s , its the 81 mm i was looking to find out roughly the cc.
Cheers .
Andy.

 

[202mphbusa]

for ball park you know most of the info
Bore and stroke
Head volume can be searched for a ballpark number
then fill in the other fields
bore 84mm
stroke 71.5
.76mm head gasket thickness (.03)
19.cc head volume
head gasket bore size 84mm
piston effective cc is info from measuring or contact piston manufacturer
then deck height play with that number to dial in comp ratio cause that you can adjust via spacer plate swap