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Re: toploader to C5 adapter building.
Posted by: Seth Emerson ()
Date: April 13, 2019 05:01PM

I used tubes on my side-shifter conversion. (Corvair engine in stock location) The only issue I had was bouncing. If you dampen their up-down movement, the tubes should work well. I would use cables in any new install.

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: April 18, 2019 10:39PM

Been trying to get the adapter done, waiting on the machine to open up. I finally got it in the machine but ran out of time tonight to finish it. Maybe I can get it done by next week.

I had some free time, so why not build a billet front support. Made 1 out of 6061 alum. the other is 1018 steel.

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: April 18, 2019 10:41PM

Steel one. This one started at 28 lbs. Will end about 1 lbs.

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: April 27, 2019 12:06AM

Finished up the aluminum bearing support. 1 more op for the steel one.

Going to send both out for finishing. Aluminum will get hard Ano, steel one most likely black oxide.

Finally broke down and pulled out the 3d scanner for bolt hole patterns. we will see how close my guess work is.

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: TheRealHip ()
Date: April 27, 2019 11:17AM

Is that an insert drill you are using?

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: April 27, 2019 11:44AM

I believe so. I'll check when I go in today to finish the steel one and start the adapter plate. (I hope)

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: TheRealHip ()
Date: April 27, 2019 12:51PM

Insert drills really kick butt. I use 'em all the type. Save alot of time.

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: April 28, 2019 09:14PM

Got down to the shop and finished up the Adapter.
about 1" thick overall. .550 thick between the diff and the case. I'll take some measurements later this week of transmission face to center line of the axles.

Bunch of pictures.

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: April 28, 2019 09:15PM

more

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: MattNall ()
Date: April 28, 2019 09:17PM

Beautiful work!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: April 28, 2019 09:23PM

I have a few more things to make.
Ordered some torque lock synchronizers. Need to make the ring to fit to the c5 diff. Polish or grind the output shaft for the seal to split the gear oil.

Getting close. Might be ready for the car in a week or so. Now I just need to build the engine.....

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: May 01, 2019 01:09AM

Got all the little stuff handled. Should get the mainshaft back tomorrow. Picked up all the new seals and orings today. Went all viton. Made the ring adapter to the c5 diff. New synchronizers assembles showed up too. This should wrap this thread up. I'll toss a couple of pictures up of the finished product when I get ready for the swap.

Side note:
Got the short block dropped of at the machine shop. Hope to start building it in a few weeks. Goal is to get the motor/trans swap done by June. Next thread might be on a billet intake. Not corvair related, so we will see.

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: v8vair ()
Date: May 01, 2019 04:53AM

Nice !!

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: May 10, 2019 10:14PM

I have some numbers and I'd like to compare with the crown transaxle.

:Toploader Case/ Jerico 10.184
:C5 diff axle center to face 4.5 ish (tape measure)
:Adapter plate. .550

Grand total of: 15.234 center line to face of transmission.

Bellhousing I have is aftermarket ford atm, the conversion one is in my car.

:Ford lakewood scattershield w/o extra plate 6.150 ish

bellhousing to center line axle: 21.384 lets call it 21 3/8. (ford bellhousing)

Not sure if chevy bellhousing is shorter, longer or the same.

Anyone know the corvair #'s?

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: v8vair ()
Date: May 11, 2019 06:50AM

FYI I used the Jerico top cover with the return for a cooler line to vent the trans. Its baffled well. Mike

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: May 11, 2019 05:54PM

Thanks for the heads up mike. I'll look into getting one.

I had a few mins to mess with the setup today. Might start pulling the old one out of the car tomorrow.

Confirmed the overall length for center of axle to bellhousing face. 21 3/8"

I moved the wheelbase in the car for the last setup. 1/4" or so to the rear of the car. Still have center line of the diff and wheels inline. Also made the wheel centered in the fender. If i remember correctly, all said and done it makes the motor 1/8" further forward then the crown setup that was in it. I can live with that.

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: OttawaCorvairGuy ()
Date: May 12, 2019 03:24PM

Darrin,

Great thread!
If I may ask. Why not use the stronger or second C5 differential vs the early?
It corrects the weak points that GM had to deal with over the years.

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Re: toploader to C5 adapter building.
Posted by: Jim Stukenborg ()
Date: May 12, 2019 07:02PM

Darrin, You said that you went all Viton. There has been some discussion here on CC that Viton is great for static seals but doesn't work well as a seal against turning shafts. Jim

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: May 12, 2019 07:13PM

Using the newer c5 diff is in the works. The one in the picture is a spare I had just in case I wanted to run a different final drive ratio. Its a 2:73. The one in the car atm, is a 3:42 but still the 1 rib case. So far I haven't needed to upgrade anything. Car's fairly light @3000lbs and I don't take to the drag strip. Most of the diff failures come from really hard launches and sticky tires. I'm trying to decide if i want to buy another 3rib case and then put all the 3:42 stuff in it or buy a 3 rib 3:42 diff complete and then rebuild it with all zo6 or aftermarket stuff. I figure I can throw about $2k into a diff real quick. That's if I put it all together myself which I hear is 0 fun. As of right now I don't think I "need" to change it but it might be nice. Remember this car ran a stock corvair trans and diff with the bbc in it for years, so all the weak c5 stuff is still miles stronger and cheaper.

Your post about the sdr-5 is starting to look better and better. Still a tough pill to swallow at 9k+ and the shifter for it is 2k+. I think if I went balls out with new everything toploader or big car Saginaw and a super built c5 diff I would be under that by a bit.

Hopefully with the new motor and trans setup the goal is to get the car to 2800lbs.

Darrin
65 Crown
68 Monza convert

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Re: toploader to C5 adapter building.
Posted by: Vairefast ()
Date: May 12, 2019 07:30PM

Hmm about the viton seals... The only 2 that are in question are the front bearing support and the diff adapter. The stock c5 diff had viton from the factory so I went with that and the front support I got both rubber(buna) and viton. Time will tell.

Darrin
65 Crown
68 Monza convert

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