[Fot] 89MM piston question

[Terry Stetler]

Indeed there are Glen.

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

________________________________
From: Fot <fot-bounces at autox.team.net> on behalf of fubog1 via Fot <fot at autox.team.net>
Sent: Saturday, September 1, 2018 7:34:26 AM
To: rkramer56 at gmail.com
Cc: fot at autox.team.net
Subject: Re: [Fot] 89MM piston question

everybody else seems to be using 89.
HaHa not everybody, rules say 87mm, there are still a few guys running them (and winning)...
Glen



-----Original Message-----
From: Bob Kramer via Fot <fot at autox.team.net>
To: van.mulders.marcel <van.mulders.marcel at telenet.be>
Cc: fot <fot at autox.team.net>
Sent: Fri, Aug 31, 2018 11:26 pm
Subject: Re: [Fot] 89MM piston question

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<mailto: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<mailto:fot at autox.team.net>>
Cc: "fot" <fot at autox.team.net<mailto: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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