Re: Pistons

[andrew smith]

David, You need to sit down and work a few things out.If you have a stroke of 96mm and a bore of 86mm then the capacity is about 557cc per cyl.Then you need to work out some combustion volumes.If the pistons were 15cc,combustion chamber 47cc,gasket area 1.25mm thick 7.26cc and deck shortfall of 1.45mm 8.4cc.Add all these together to get 77.66cc then add this to the cylinder volume of 557.645cc to get 635.305cc then divide this by 77.66 to get a comp ratio of 8.18:1.The figures ive used are only guesstamates so you would really need to find out the dish volume for the pistons,your combustion chamber volume,gasket thickness(usually between 1 and 1.25mm depending on type),and check whether the block has been decked.You may be able to get a few more cc's from the combustion chamber if you need to get the comp lower.Hope this helps. Andrew Smith David Costello wrote:  would that be useable?or is 1.45mm below deck too low? Dave ----- Original Message ----- From: andrew smith To: [EMAIL PROTECTED] Sent: Tuesday, February 12, 2002 11:16 PM Subject: Re: Pistons  David, 32.1mm for comp height plus 48mm for half z24 stroke plus 145.9mm for L20 rod is 226mm which is 1.45mm short of the 227.45mm z20 deck height. Andrew Smith David Costello wrote: I'm lost hehe sorrywhich is the distance from the centre of the pin to the top of the piston the guys at ATS put RB30ET pistons in their Z18 monstersupposedly gave 6.5:1 comp ratio, and only required a 0.040" overbore I'm just trying to work out what compression they would give me with my Z24 crank and L20 rods in a Z20 block Dave ----- Original Message ----- From: Terry Rudd To: [EMAIL PROTECTED] Sent: Tuesday, February 12, 2002 10:08 PM Subject: RE: Pistons David,The ACL catalogue give the following data on the RB30T enginePart Number                   - 6MKRY9301Units Of Measure              - MetricBore size                     - 86Head Type                     - 119Compression Height            - 32.1Distance Between Bosses       - 24Piston Overall Length         - 64Pin Number                    - R3347Pin Diameter                  - 21Locking Device                - CCClearance                     - 0.025Position                      - 45.3Comp Ring Quantity 1          - 1Comp Ring Quantity 2          - 1Comp Ring Quantity 3          - 0Comp Ring Quantity 4          - 0Oil Ring Quantity 1           - 1Oil Ring Quantity 2           - 0Comp Ring Width 1             - 1.5Comp Ring Width 2             - 1.5Comp Ring Width 3             - 0Comp Ring Width 4             - 0Oil Ring Width 1              - 2.8Oil Ring Width 2              - 0Comp Ring Depth 1             - 3.9Comp Ring Depth 2             - 4.5Comp Ring Depth 3             - 0Comp Ring Depth 4             - 0Oil Ring Depth 1              - 3.6Oil Ring Depth 2              - 0Comp Ring Type 1              - Comp Ring Type 2              - Comp Ring Type 3              - Comp Ring Type 4              - Oil Ring Type 1               - Oil Ring Type 2               - ============================== -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of David Costello Sent: Tuesday, 12 February 2002 10:05 PM To: Ozdat Mailing List Subject: Pistons anyone have specs on VL Turbo pistons??pin height, bore, dish size ?? Thanks 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/ --------------------------------------------------------------------- --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/ --------------------------------------------------------------------- --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/ ---------------------------------------------------------------------