I like stucco. And sand

 

Two cans of brake cleaner and I can see metal on my '86! Removed all the original(?!) crunchy-bearing tensioner parts, and test fitted the PorKensioner from the '81. It fits, just! The cover too!



I don't think I'll use the lower crank pulley (I already ditched the water pump pulley). No modern engine has them and my opinion is that the small pulleys are band-aids for the lack of dampening and proper tensioning from the factory tensioner.

I am working on a revised CAD drawing as I've decided that there's no need for the bracket to be adjustable. If I get the pulley in the right spot, there's enough range in the tensioner to handle different engines/belts.
...

Anyone know offhand if the A/C bracket changes significantly after 86.5?

 

sssssssWEET! I think the bracket does change.

 

A quick stroll through PET shows the same bracket, engine side, from 86 up, and the 80-85 looks to be basically the same casting. The steel 78-79 bracket may be a problem - SharkSkin and friends may have to do a little hammering.

 

I went from this:



To this:



No worries.... IIRC Heinrich ened up with the old bracket, maybe he can help you look at clearances.

(BTW, what idiot at Porsche thought it would be a good idea to *require* removal of the air pump bracket to change the AC belt? Just another of the many "ongoing improvements" )

 

I'm gonna need that sooner rather then later Ken. Like before I need the brackets for the headlights we talked about 2 years ago. But I need the covers to go over nicely.

 

Thanks for the pics, Dave. Is that the conversion pump kit?
...

Brendan,

I'm still wrangling with how to have the the PorKensioner bracket made, but it shouldn't be too long here before I have something that works, and is reproduceable.

I've got the (covers) sitting here. I still have yet to take out my headlights and make new brackets. I still owe brackets to Carl, and another fella.

 

Yep, Griffith's kit, later AC & air pump brackets.

 

The Brackets for the lights are honestly for the 78, which is now 2nd in line, instead of third. SO, 1st in line now that the 89 is in the driveway ready for pickup and a trip to, uh, well very near you, is the 86. That car could probably do with the pt. But if I don't use it on that one, the 89 will surely recieve.

 

Ken, this is excellent. I may actually be able to relax a bit driving the 928 after installing this in my car so please count me in as a ready-to-buy customer.

 

It's getting there. Revisions are becoming smaller and smaller.

From:


To:


The next revision will have a few MMs of adjustment, in case of slight belt length or engine size differences. The timing belt position (forward, back or center of the gears) is extremely sensive to the angle of the pulley so I'm going to weld the pulley post on, then take it to a machine shop to have it ground flat.


The square hole is for a 3/8" socket wrench to rotate the bracket.

As this is a critical part, I'm taking no chances with the bracket. 5/16" steel (with lightening holes). I just don't think I can get an aluminum piece to fit through the cover opening, and still be flex-proof.
...

I think I've developed a Russian sense of design. "технология большая" as they say (big technology = bigger is better).

 

хорошо мой друг !!

 

Looking really good, Ken! So, about the square hole -- you have to remove the tensioner to get to that? I take it that there is no place to put that square hole where you could reach it with the tensioner in place?

 

Ken, with the weld ...... are we sure that the incredible vibration will not fatigue it? If that happened, we would be in a WORLD of hurt.

 

Dave looking at the Cad style drawing of it you would not need to remove the tensioner to access the square hole, and those items could be welded on there so solidly that you would never get them off.