dprantl

Since the 968 is basically 1/2 a 928 motor and has a steel cam gear, it could be made to fit? Does anyone know if the 968 cam gear has the same number of teeth?

Dan
'91 928GT S/C 475hp/460lb.ft

928mac

Why not get something like this

blown 87

More parts to come loose, more parts to break, I see no win with that set up.

The stock gear is bullet prof, the hub, the key way and the cam, not so much.

BTW, by bullet prof I mean if you keep the tension right it will last a very long time.

worf928

IMO, roughly 100k miles, depending upon if the belt has been run too-light or too-loose. I've seen 60k gears that had to go because the timing belt had been over-tight. I've never seen gears in the 120k-mile range that didn't need replacing.

worf928

Any idea yet on when the new ones will be available?

White Lightnin'

Had mine replaced (with T-belt & w/p) in 2006 @ roughly 180k miles...

hacker-pschorr

See post 21 followed by Greg's answer in post #25

namasgt

Hello Roger

Don't want to get off topic but how is the availability of the crank gear and oil pump gear?

Ali

oups59

Lucky me. I changed mine last year (bought the parts in 2008).

I paid 75$ for one (only 1 in Canada was available at that price) and get the other one from Roger. They are now twice as much ....

Ethre

I think the HTD gears may be a standard tooth size (unlike the early year square tooth design it appears). In that case, it may be possible to get pulley stock and them machine down from there.

How many teeth are on the gears?
HNeuman has a pretty good selection of pulley stock available.

This may be the simplest option if its available.

Mike Simard

I did contemplate this before and could make them. If Greg B needs help then I can. This isn't something that would be fun for someone to spend effort to make only to have someone else come along and duplicate.
The 928 'gear' form is unique and I can see it getting screwed up by half assed manufacturing. It's not easy to match the trueness, consistancy and finish of the Porsche part and I can see problems if someone pumps some out after seeing a way to make some money here.

Say, does anyone need camshafts to attatch to this part? I can help there!

the flyin' scotsman

Thats a great price Luc.............they're currently listed at $199 or $249 each depending on the supplier

oups59

Malcolm, you are right, this was a very good price. In fact, the price on some parts are cheaper here in Canada than in the US.

For example, I bought a clutch kit (OEM Sachs) last week for 620$

ROG100

Just to be clear - 928sRus will be having these made in one form or another.
My goals being availability and price.
I was not looking for a manufacturer but looking for ideas on which way to go with the design.
Just remaking what we have or incorperating changes to enhance the product.
Already have new samples with two machine shops who specialise in gear cutting.

Does anyone know why Porsche changed from steel to alloy gears? Was it weight or wear or?

PorKen

I think weight must have been the reason they went to aluminum gears. I think alloy gears would be easier to machine for aftermarket production, anyway?

For less machine time, you could delete the three small holes. They must have been used for something at the factory, but aren't used on the street. '86-up, one hole aligns with a boss on the 5-8 side rear cover at #1 0|T. (Seen through the large hole, below.)



Late '85 have the boss, but not the holes. (Early '85 rev. 00 gears don't have the front index cutout, either.)

Also, the nubs on the inside of the gear are just for aligning the rotor.