I've always used 87 MM due to the rules but everybody else seems to be
using 89. The procedures are the same so It'll be the same. I blew a head
gasket last time out, compression into the cooling system and blew off the
bottom hose. I guess it wasn't tight enough, and scuffed two pistons
before I could shut it down.
Bob Kramer
On Fri, Aug 31, 2018 at 12:43 PM, <van.mulders.marcel at telenet.be> wrote:
> Bob,
> It is definitely necessary to make that modification to the liners. The
> relieve should correspond to the shape of the combustion chambers : about 4
> mm wide on a 89mm engine.
> Marcel
>
> ------------------------------
> *Van: *"fot" <fot at autox.team.net>
> *Cc: *"fot" <fot at autox.team.net>
> *Verzonden: *Donderdag 30 augustus 2018 00:05:43
> *Onderwerp: *[Fot] 89MM piston question
>
> Do the guys running the 89MM pistons and liners need to relieve the liners
> to clear the intake valve, or does the extra MM make the difference?
>
> Bob Kramer
>
> On Tue,
>
> _______________________________________________
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>
> http://www.fot-racing.com
>
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> marcel at telenet.be
>
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