Alright, time to talk tech. I PROPERLY designed a bolt-on TT adapter for the 928 to mate the vette C5 2-piece BH and 5-speed torque tube.

I want to take it a step further and make sure the same adapter can be used on the 928 auto. I do not have a 928 auto coupler to measure. So If you have one handy and a good mic, please post dimensions.

928autocoupler.jpg

Got dims from DOZ.....

Red= 76 mm
Blue= 51 mm
Green= 67.4 mm

 

SWEEEEET.

so you are saying we could get a vette auto?

 

The 4L60 has aftermarket controllers available. I don't think there is anything out there for the 6L80 yet.

 

I'm developing the Vette auto swap with Dinsdale. You guys will have to figure out paddle shifter tech. I've got the hardware interface down and it will be less expensive/parts than the manual swap.

These dimesnsions will be used to mate the 928 flex-plate to the vette auto TT
No more TBF issues with the Vette TT/trans either.

 

If I were you, I would measure it myself. As good as people migt be with doing this, I could never trust the numbers.

 

Would it help to just get a solid works drawing?

I think I have one of those kicking around that I could input pretty easy

 

That would be nice of you. I have the program that transfers it to jpeg.
This will also help with the adapter I designed for the LS engine to 928 auto TT.
The LS to 928 5-speed I've already done.

 

When I start my build, I will post part #s as they all will be the same as I did on the 948 swap. The sweet part is the 928-LS headers are off-the-shelf and require NO mods which is a big expense for the 944-LS swap. The same BH adapter for the 944 is used and modded to fit the 928 rotating coupler. I'll shorten the tube and exclude the 1.00" thick pilot bearing adapter. Just one less part to machine/install.....

100_4670.jpg
100_4673.jpg

 

Wonder how many minutes it will take for our resident Hack to copy and paste to his website.

I'm liking what I'm hearing here.

 

Sanderson makes 3 sizes headers that will fit. I'll use part# LS-134 as they are 1 3/4" primaries. They have LS-158 and LS-150 which are smaller primaries.....

http://www.sandersonheaders.com/Sand...eader-Set.html

http://944hybrids.forumotion.com/t17...ifolds-headers

 

For the Conversion clutch disc, I use SACHS part# BBD-4163. Should be good for 400HP.

A stock 2000-2004 Camaro/Vette Flywheel and pressure plate will work, but I will use Centerforce CF-360010 pressure plate and a LUK billet steel flywheel (inexpensive).

The billet adapter I designed uses a Standard T56 throwout bearing Dorman part# CS-360058 and easily allows -3an stainless clutch line.
C5Throw-OutBearingDims.jpg

Make sure the D951004 casting is on the alloy housing....

getimagephp.jpg

clutch12.jpg

 

Last week I priced the Sanderson 1.75" ceramic coated headers. $ 525 + $ 74 for the reducers, copper gaskets, bolts, etc. Total: $ 599 + shipping. T

 

I made an inexpensive adapter to mount a 7/8" or 13/16" Wilwood Clutch MC to the 944 firewall and will do the same for the 928 if it's Clutch MC cannot push enough volume....

DSCN0193.jpg

You can do the mod with a dremel tool....

Image002-12.jpg

 

Thanks to GM, the off-the-shelf roller pilot bearing that needs no 928 bearing adapter is....
AC Delco # CT1082
GM # 12557583.

 

For the 5-speed swap you can only use the 2-piece bellhousing to clear the pressure plate...
GM part# 12554980

For the Auto swap you can use the GM auto bellhousing. It has a smaller curvature for the flexplate.
GM part #12551118