> > > How many people are in the market for a flex plate?
> > >
> > > Paul Lamar
> >
> > all of us. - jofarr, soddy tn
> >
> > Is your right foot included? :) Well that is one.
> >
> > Paul Lamar ...No rotor no motor.
>
> *From:* hurrant karibian
> *To:* tracy crook <mailto:tcrook@rotaryaviation.com>
> *Sent:* Wednesday, November 01, 2006 10:28 PM
> *Subject:* Flywheel
>
> Will an RX8 automatic flywheel [drive plate] and counterweight work
> with the PRSU
> I bought from you?
>
> The counterweight will work fine but the only flywheel [drive plate]
that
> works
> without modification is the 1986 - 1991 RX-7 auto flywheel [drive
plate].
> When we get
> time we plan to make an adapter plate that will allow use of the RX-8
> flywheel [drive plate].
>
> Tracy Crook
>
> ----------------------------------------
>
> Hi Paul
> sorry for asking dumb questions.
> What do you mean with a flex plate?
>
> Drive Plate , Flywheel or similar?
>
> Kind regards
> Thomas
>
> ---------------------------------------------------
> There are no dumb questions. Back in my youth we used to
> call these flex plates. Mazda decided to call them Drive Plates.
> For the last seven years on here confusion reigned as people
> were calling them all sorts of things such as flywheels.
> Since there ARE flywheels on manual transmission engines
> and Drive Plates on auto transmission engines you can imagine
> the confusion. Especially when it came to the RX8 engines as there
> initially was a big difference in the normally aspirated engines power.
> The low power, auto transmission engines had four ports and the
> high power engines had six ports. That really confused the heck
> out of some people as it used to be the other way around.
> A four port engine would generate more power than a six port engine.
>
> Well Mazda threw us a curve and the new six port RX8 engines had
> more port area than the old four port RX7 engines. Hence more
> power. The bigger the ports, the less pumping losses and the more
> the power. In 2007 Mazda finally did away with the four port engine
> and now all RX8 engines are six ports. The power still varies however
> but it is varied by other means such as intake manifold configuration.
> People would buy high power, six port, manual transmission, RX8
> engines and suddenly realize they needed to spend another $400 or
> $500 on Drive Plates and counter weights so they could bolt up Tracy's
> psru. All is not lost however. If you have a low power, four port RX8
> engine with drive plate and counter weight you can get gobs of HP out
> of it if you convert to a p-port. No need to spend $400 to $500
> for a drive plate and counter weight.
>
> There is lots of confusion about this so I looked up the proper
> nomenclature. Page K-156 1994 Mazda RX7 workshop manual this
> device is called a "Drive Plate" and not a flywheel.
> Chapter K is the automatic transmission chapter.
>
> In chapters H & J in the manual transmission chapters page H-18,
> J-12 and elsewhere it is referred to as a flywheel.
>
> In the Mazda RX7 1986 to 1991 Haynes Repair Manual page 190 it
> is also referred to as the driveplate.
>
> So regardless of what Tracy calls it, we will, in the future,
> refer to it by it's right name which is Drive Plate.
>
> The reason this is important is there is a huge difference in the
> weight of the drive plate and the flywheel. The drive plate
> is much lighter and the Drive Plate is the only part that works with
> Tracy's psru. The flywheel does not work.
>
> Paul Lamar ...No rotor no motor.
Hello Paul,
thanks for making this clear.
I bought a six port from Rupert so I need a drive plate and a
counter weight which works with Tracy PSRU.
I'm in.
Best regards
Thomas
Another Thomas here, with a Rupert 6 port. I'll need one also, along with
the better looking bell housing.
Thomas Phy
RV-7 Wings almost done!
Renesis
The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site.
http://www.rotaryeng.net
Copyright 1998-2006 All world wide rights reserved.