Easy
Work Dave
No
real equations for calculating what fits, only for CR
etc
Basically
you start with the block deck ht from center crank to block deck. This gives you the maximum distance
that can be taken up by the crank on half stroke, conrod and piston
compression height. Simply by
juggling crank stroke, rod length and compression hts various combos can be
designed. Other factors to take
into account though are Stroke:rod ratio, counterweight size, piston skirt
size and so on.
For
example, my L18 that I am building has the crank stroked from 78mm to 82mm,
using L16 rods and custom compression ht flat top forged pistons. I wanted the slight stroker as my
aim was for 1995cc swept volume with an 88mm bore. With this combination I have a good
stroke to rod ratio which assists revs and reduces piston scuffing, I have
maintained cylinder wall strength reducing the possibility of cracking thru
wall flex, and generally have a balanced size increase throughout. This is capable of being calculated
for any combination, even the Frankenstein 2.6 litre L20B’s
(yuk)
Regards
Brad
-----Original
Message-----
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of David Costello
Sent: Monday, September 04, 2000 10:13
PM
To: Online Datsun
Club
Subject: engine
capacity
I've noticed a few of you working out
custom engine capacities by mixing and matching different cranks and rods
(eg. L16 crank with L18 rods etc etc)
I
was just wondering if there is an equation to work it out? if so I don't
suppose anyone could enlighten me could they?
Dave
