FWIW, I have 5.2l magnum short block sitting on the floor of my garage. I have
not measured but I would estimate the pistons are a good 0.040-0.050" down into
the bore. Also, for accurate compression calculation besides the compressed
thickness of the head gasket you need to know it's bore (and it's a lot larger
than the bore of the cylinder). For example the 360 I just built using magnum
heads for my Barracuda has a head gasket bore of 4.180" (Fel Pro brand gasket).
Dave Clement
99 SLT+ CC 4x4
In article <BAY19-F2A4FA00FA45825121239EC3F20@phx.gbl>,
scsilverdakdml@hotmail.com ("Ronald Taylor") writes:
>
>
> To get a accurate calculation, you need to know the Piston Deck Height as
> well, not just the chamber volume, and head gasket compression
> thickness......
>
> Most factory shortblocks have the piston so far down the hole you need a
> flashlight to find the piston top!.......not good for building cylinder
> pressure.. ;)
>
> Ron
> 01' Dakota Sport RC 3.9...
> http://www.dodgetruckworld.tenmagazines.com/mygallery.asp?id=8143
> http://www.dragtruck.com/ENTRIES/RUSCAS2XUMHU.html
>
>
>
>
> From: "Bernd D. Ratsch" <fasstdak@hotmail.com>
> Reply-To: dakota-truck@dakota-truck.net
> To: <dakota-truck@dakota-truck.net>
> Subject: RE: DML: Compression calculation?
> Date: Tue, 14 Jun 2005 17:20:30 -0500
>
>
> Hehehehe...seen the same calculator on many different sites. :)
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of
> david.clement@verizon.net
> Sent: Tuesday, June 14, 2005 4:40 PM
> To: dakota-truck-moderator@bent.twistedbits.net
> Subject: Re: DML: Compression calculation?
>
>
> Here you go! http://www.csgnetwork.com/compcalc.html
>
> Dave Clement
> 99 SLT+ CC 4x4
>
>
> In article <MABBLNOKHJLBHKDDEKOJAEEKGMAA.joeman@gbonline.com>,
> joeman@gbonline.com ("Joseph Orsini") writes:
> >
> >
> > OK are there any compression calculators out there? If I am using
> > stock parts and have a 10.5:1 CR with 64 cc heads and switch to 79cc
> > heads how much will my CR drop? Are there any web tools out there for
> > figuring this out?
> >
> > Thanks,
> >
> > -Joe
> >
>
> _________________________________________________________________
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This archive was generated by hypermail 2b29 : Fri Jul 01 2005 - 09:48:06 EDT