928-LS Tech

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Jan 2, 2013 | 03:15 PM

xschop

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928-LS Tech

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

Last edited by xschop; Jan 7, 2013 at 07:57 PM.

Jan 2, 2013 | 05:53 PM

yardpro

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From: Morehead City NC

SWEEEEET.

so you are saying we could get a vette auto?

Jan 2, 2013 | 05:55 PM

123quattro

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From: Farmington Hills, MI

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

Jan 2, 2013 | 06:29 PM

xschop

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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.

Jan 2, 2013 | 08:47 PM

Imo000

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From: Cambridge, Ontario, Canada

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

Jan 3, 2013 | 02:03 AM

Lizard928

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From: Abbotsford B.C.

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

Jan 3, 2013 | 02:14 AM

xschop

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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.

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Jan 3, 2013 | 11:52 AM

SeanR

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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.

Jan 3, 2013 | 12:05 PM

#10

xschop

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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

Jan 3, 2013 | 12:20 PM

#11

xschop

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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 edited by xschop; Apr 22, 2013 at 02:50 PM.

Jan 3, 2013 | 12:31 PM

#12

77tony

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From: USA

Quote:

Originally Posted by xschop

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

Jan 3, 2013 | 12:46 PM

#13

xschop

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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

Last edited by xschop; Apr 22, 2013 at 02:50 PM.

Jan 3, 2013 | 01:28 PM

#14

xschop

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

Jan 3, 2013 | 01:35 PM

#15

xschop

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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