RE: engine capacity

[Brad HALLETT]

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   --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ --------------------------------------------------------------------- --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ ---------------------------------------------------------------------