Few VW questions, anyone know any significant differences between
Great Plains and Revmaster approaches to VW Type 1 engine?
As time has gone by Revmaster has developed more and more proprietary
parts for their engines - so your only source for parts is Revmaster for
some things. They are both excellent engines.
In particular, Revmaster has a hemispherical chamber and improved
alloy in the heads. Wondering any feedback on that.
Haven't had a bit of trouble with EMPI heads GP uses. Run the engine
cool, no matter which one you get.
Also, would welcome any comments on ignition types, aircraft plugs vs
automotive, dual ign/plugs "required"?
Not required, but a good idea. Revmaster has gone to double electronic
ignition which means you can't hand prop it (unless there's a work-around
on that). I get 50-100 more RPM with both ignitions (mag and coils)
running so dual ignition gives better efficiency in my experience. Cars
don't seem to need dual ignition for efficiency though so I could be all
wet on this issue.
The car plugs work just fine for aircraft application.
And as far as electronic ignition, major pros and cons, and do those
have knock sensor options in this application?
No knock sensing on the simple GP electronic ignition. It's not a common
problem if the electronic ignition is timed correctly at installation.
Electronic ignition is a great idea. Ideally you'd want both a mag and
electronic.
One last thing, ken rands KR1 had the mag as belt driven and up high
so the engine could be against the firewall. I would like not to
extend the engine mount out just to accommodate a huge center magneto,
so anything which speaks to this would help.
Ken Cottle built a metal-clad indent on the firewall on my plane - not
for the magneto but for the starter. The mag is a tight fit however and
I'm having to pull the engine forward to replace it - a project I am
getting ready to finally do. I have a new one to put in while the old
one gets sent to Aircraft Magneto Service, now in Montana. Used to be in
Seattle. I may not actually send it in since I don't expect to put
another 800+ hours on the new one (as I've got on the old one - without
any service. I've been bad).
I'm also going to replace the Slick harness. If anyone has a new set of
m2266 harness wires they've got stashed I'm in the market for them.
**
These are both great engines. I like the idea of buying the GP as a kit
and building it yourself though. You know what you've got when you do it
that way. Langford and Bouyea are the VW gurus around here - there may
be others.
Mike
KSEE
Blazeray
Deemed: One Household Item Everyone Should Have In Any Emergency
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