The turbo flywheel is different (bigger).  The reason for this is that the turbo cars have a much beefier clutch and transmission.  This is also why it needs a different starter and has different teeth.  Also, the stock flywheel is balanced differently from aftermarket flywheels.  The aftermarket flywheels use the same counterweight as the auto transmission, and swapping the weights around is annoying, so that's another reason to not use stock flywheel.

As for whether the manual flywheel could be used in place of the flex plate, I don't know as I don't really understand how the PSRU hooks up.  I know the flex plate is different "somehow" as it takes yet another kind of starter.

On Wed, Jul 13, 2011 at 10:19 PM, Kelly Troyer <keltro@att.net> wrote:

Dave,

 

   You may be right...............I am not at the hangar now so cannot do serious measureing............They sell a different flywheel

block for the automatic...........It nests around the counterweight................I think it is different than the manual flywheel blocks

so as not to subject the thin auto flexplate to the 350 ft /lb torque to loosen and tighten the eccentric nut.............Will measure

both flexplate and steel flywheel (diameter, fore , aft , etc) and report as soon as possible................The flexplate and steel

flywheel both have 125 teeth which I hope indicates the same diameter.............<:)

 

 

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo

From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Sent: Wednesday, July 13, 2011 9:38 PM
Subject: [FlyRotary] Flywheel sizes

Here is some good evidence that we will not be able to use the flywheel in place of the flex plate.

On this page at Mazdatrix, scroll down until you see the tools labeled "flywheel stopper"

http://www.mazdatrix.com/ftools.htm

Note that one of them fits the non-turbo flywheel BUT NOT THE AUTO.  And the other fits the turbo (Which I assume is different than the n.a. auto since they don't list it there either).  We may be stuck just trying to beef up the existing flex plate.

--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net