Big bore engines.
Here is a good site to visit: http://www.mgbmga.com/tech/mgb12.htm
I *think* Moss' big bore pistons are the Lotus ones. Call them to
verify.
I have heard that .060 over makes a well balanced engine.
Remember if you do the Lotus piston conversion is the last time you'll
be boring that block.
Larry Hoy
>-----Original Message-----
>From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net]On
>Behalf Of Chris Thompson
>Sent: Thursday, March 22, 2001 2:51 PM
>To: mgs@autox.team.net
>Subject: Engine sizes. WARNING: POTENTIAL HOLY WAR.
>
>
>On Thu, 22 Mar 2001, WSpohn4@aol.com wrote:
>> The MG blocks are fairly thick castings, but have variable
>wall thickness and
>> I have seen serious core shift. You could end up like one of
>my blocks -
>> taken out to 2000, and only broke through to water when it
>was finish honed.
>> Short of ultrasonic testing, or starting out knowing you are
>going to sleeve
>> the block, I wouldn't advise anything over the 1950 size.
>
>I hadnt planned on going past 1950. As I understand it, to get
>to 2100 you
>have to stroke the crank and that seems a bit harsh.
>
>-snip lotus piston comments for brevity-
>> These days, you can have forged pistons made up for less
>than $100 each that
>> will last forever, have the right deck height, and won't have the
>> inappropriate valve cut-outs for the Lotus that will tip the
>engine shop off
>> as to what a cheap bugger you really are!
>
>I'd heard offhand comments that Lotus pistons were wrong, but
>never comments
>so precise as yours. Definitely something to think about.
>
>Where does one get pistons made? Standard machine shop fare or
>someplace
>more specific? My machine shop guy is on vacation this week so
>I cant ask
>him.
>
>What specifically do I ask for? Hand them a standard 1800
>piston and say
>"Make me four of these but with a bore size of X"?
>
>Anyone know if the 1950 pistons that moss sells are simply
>Lotus pistons or
>are they proper B series pistons?
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