BC

Don't change a word!

Mike Simard

I don't think I'll do that again.
One reason I wanted that instead of the Porsche style was to have the line poke into the ring gear area so it can spray at the middle of the diff. Yes, the middle of the diff housing. I feel that LSD disc units like this are poorly lubricated and that it causes problems including spider gear breakage. There's just no way of oil to get in there.
Now there's a line you can see in the pic going back there.
Rob Edwards had some great pics of his GTS original spraybar and I feel that aside from the diff, it's a much better setup. Another case of Porsche stuff being better than anything an ameteur can come up with.
I am happy with the final results but it was a PITA to install the lines and have the spray holes be in the right place.

BC

What about just a simple drip from the top as a sort of bleed from a basic "move the fluid" system, that goes in the front and comes out the back (existing fittings - that's what I am doing)?

If you drop from the top, it will "occasionally" get into the little hole where it will get into the spider gears and LSD clutches.

I agree though - those spider gears don't get much lube from what I can see.

Mike Simard

I feel that it's a misconception that rubber bushings are needed lest the ride be brutal.
Yes, the auto manufacturers like that but IMO the main reason they use rubber bushings is not compliance but the other reasons I mentioned.

I've driven the same bushings on the street before and it's just fine. Maybe even smoother because the suspension doesn't vibrate on sharp bumps but the energy is absorbed by the shock.

The wheels needn't be flopping around in rubber, they just do that to keep from having to deal with friction bushings!

BC

Well, then maybe you can have the best of both worlds. How much are those Pro Shocks per piece? I now have two full sets of rebuild able bilsteins, but you never know.

Mike Simard

That could be a good thing. the pinion gear has a formed part that directs oil to it. I didn't see anything that moved oil to the center in that 88 trans though. A little ridge at the top of the case could drop some oil wherever you want it.

BC

What are you holding back Mike?

Mike Simard

You're really digging up some odd stuff!

That's my 928 head getting seats cut for Threshie 39mm titanium valves. What fun! Those are 968 seats thgat have been installed and you can see the CNC milling I did on the ports although it looks hideous in that pic.
Those were some kind of IRL valve or something. It took some work to use them.
That valve seat tooling was made by me. One of the things about those valves was the odd .2800 stem, it's about .005 bigger than the normal 7mm and I've never seen it before. Sizing the guides was a bear.
The valve seat tooling is nice because it's not adjustable and therefore more rigid. Since I make custom carbide form tools in my day job it was easy to make some specifically for these valves and get the seat dimensions just right.

Now that I finished I have nice titanium valves modified to be used with stock type lifters!

worf928

Just for the picture pr0n...

hacker-pschorr

+1

svp928

Mike, as a fellow machinist, I have to say your work is exceptional! I know how much time you spent just figuring out and drawing what you wanted to do- actually making it is almost the easy part....
Really, really nice work!

Steve