Flywheel oxy/waterboxer - 914 gearbox

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Rob Habets
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Joined: Sun Sep 01, 2013 5:42 am
Location: The Netherlands

Flywheel oxy/waterboxer - 914 gearbox

Post by Rob Habets » Sat Aug 29, 2015 2:55 pm

Hi
Which flywheel can i use for a oxy/waterboxer combined with a porsche 914 gearbox, with either a 215 or 228mm clutch?
Waterboxer, porsche 914 or type 4?

Regards, Rob

Rob Habets
Posts: 20
Joined: Sun Sep 01, 2013 5:42 am
Location: The Netherlands

Re: Flywheel oxy/waterboxer - 914 gearbox

Post by Rob Habets » Tue Sep 01, 2015 12:24 pm

Anyone???

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Piledriver
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Re: Flywheel oxy/waterboxer - 914 gearbox

Post by Piledriver » Tue Sep 01, 2015 12:32 pm

Any of them, but the non-914 flywheels need the input shaft bushing installed by a machinist.
(simple 5 minute mod drill/ream to press fit for the $5 bearing)
The 901 input shaft doesn't go all the way into the crank, like a T1 trans.

I run a 228, barely worn at all after 200+K miles. You could still barely read the painted on SACHS markings on the friction surface.
I, for one, regularly embrace our new robot overlords, as I am the guy fixing the robots...

Rob Habets
Posts: 20
Joined: Sun Sep 01, 2013 5:42 am
Location: The Netherlands

Re: Flywheel oxy/waterboxer - 914 gearbox

Post by Rob Habets » Tue Sep 01, 2015 2:47 pm

So the ring-gear offset is identical on all of those flywheels?
The input shaft bushing position is the only difference?

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Piledriver
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Re: Flywheel oxy/waterboxer - 914 gearbox

Post by Piledriver » Wed Sep 02, 2015 1:57 am

Rob Habets wrote:So the ring-gear offset is identical on all of those flywheels?
The input shaft bushing position is the only difference?
Identical, no.
Close enough for good starter engagement (tooth mesh/depth)?
Yes.

The "real"914 FW ring gear "projects" a lot more (longer teeth) but the starter engagement on the 228 I installed was fine, and its pretty much in the same place as any other T1/T4 12v ring gear, give or take a mm.
I, for one, regularly embrace our new robot overlords, as I am the guy fixing the robots...

Rob Habets
Posts: 20
Joined: Sun Sep 01, 2013 5:42 am
Location: The Netherlands

Re: Flywheel oxy/waterboxer - 914 gearbox

Post by Rob Habets » Wed Sep 02, 2015 1:56 pm

Thanks

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