Speedster engine rear main sealing (Non T trans)

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Chad_Marcheese
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Speedster engine rear main sealing (Non T trans)

Post by Chad_Marcheese » Thu Feb 27, 2020 5:11 pm

I know this has been done, so hopefully someone here can tell me.

I'm trying to run a T engine with T crank with a dry clutch setup (basically like a modern type engine/clutch /trans setup). That means I need to somehow seal the rear main. How can it be done? I have one idea, but you certainly wont be able to plumb alot of pressure to the rear main from the oil pump.

The rear cam bearing area I already have figured out, that was the easy part.

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Henry K. Lee
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Re: Speedster engine rear main sealing (Non T trans)

Post by Henry K. Lee » Thu Feb 27, 2020 5:33 pm

From 6061 billet aluminum 3/4” to start with, attaching to the coil ring bolt pattern and going straight down to form into the oil pan to be made or adapted. You leave a larger than normal hole to go around the crankshaft and supporting material. Next, adapt the T crank to the dry clutch flywheel you are planning to use, (don’t forget pilot shaft bearing) the outside of this is your new sealing surface. Using billet build to the dimensions required for your bell housing bolt pattern. You will have about $475.00 just in the material.

I have a casting pattern if wish to purchase it.

Hope this Helps,

Hank


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Chad_Marcheese
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Re: Speedster engine rear main sealing (Non T trans)

Post by Chad_Marcheese » Thu Feb 27, 2020 6:49 pm

Hank,

It would be great if you had any pics of the parts and pieces with them on a engine so I could see better what your trying to convey in your message.

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Henry K. Lee
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Re: Speedster engine rear main sealing (Non T trans)

Post by Henry K. Lee » Thu Feb 27, 2020 7:39 pm

At the current moment, my new system is under development so no pictures will be posted until completed but should be very unique. Sorry if I teased you.

Hank


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Chad_Marcheese
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Re: Speedster engine rear main sealing (Non T trans)

Post by Chad_Marcheese » Thu Feb 27, 2020 10:10 pm

Well, ok then. Anyone else have some real information they are willing to share?


Shane Lach
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Re: Speedster engine rear main sealing (Non T trans)

Post by Shane Lach » Thu Feb 27, 2020 10:40 pm

Mike Penserini may be able to shed some light on the subject as well.

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Mark Gregush
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Re: Speedster engine rear main sealing (Non T trans)

Post by Mark Gregush » Thu Feb 27, 2020 10:40 pm

I know the voices aren't real but damn they have some good ideas! :shock:

1921 Huckster
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Re: Speedster engine rear main sealing (Non T trans)

Post by Dan McEachern » Sat Feb 29, 2020 11:30 am

Ok- here are a few pictures of my seal setup- pretty much self explanatory. The last picture shows the extended crank flange necessary to position the flywheel properly. The flywheel in this engine is a lightened model A with a V-8 pressure plate. Crank is model A with a full length rear main. I'll post a few more later.
Attachments
Dougs Engine_0010.jpg
Dougs Engine_0007.jpg
Dougs Engine_0006.jpg
Dougs Engine_0005.jpg
Dougs Engine_0001.jpg


Dan McEachern
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Re: Speedster engine rear main sealing (Non T trans)

Post by Dan McEachern » Sat Feb 29, 2020 11:33 am

Here are a few more pictures.
Attachments
Dougs Engine_0012.jpg
Dougs Engine_0004.jpg
Dougs Engine_0003.jpg

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CamMan
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Re: Speedster engine rear main sealing (Non T trans)

Post by CamMan » Sat Feb 29, 2020 4:01 pm

I posted some photos of an engine with this type of conversion over in the other discussion - https://www.mtfca.com/phpBB3/viewtopic.php?f=5&t=10117


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Chad_Marcheese
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Re: Speedster engine rear main sealing (Non T trans)

Post by Chad_Marcheese » Sat Feb 29, 2020 9:37 pm

Dan McEachern wrote:
Sat Feb 29, 2020 11:30 am
Ok- here are a few pictures of my seal setup- pretty much self explanatory. The last picture shows the extended crank flange necessary to position the flywheel properly. The flywheel in this engine is a lightened model A with a V-8 pressure plate. Crank is model A with a full length rear main. I'll post a few more later.
Dan, Per our phone conversation a few days ago, you were absolutely right, the pictures are worth a thousand words. THANK YOU!!! I am Definitely still interested in one of these for my "A" crank build.

While thinking about this earlier today for the "T" crank usage, I actually had a similar thought of something that is sort of like yours for the "A" crank. The problem with a "T" crank is there is no real seal surface for a seal to ride on other than the rear flange. But with some calculations I have done that may be perfectly viable.

Thank You Very much again Dan for sharing, I hope you can get a few cast up soon.

Regards


Topic author
Chad_Marcheese
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Re: Speedster engine rear main sealing (Non T trans)

Post by Chad_Marcheese » Sat Feb 29, 2020 9:49 pm

CamMan wrote:
Sat Feb 29, 2020 4:01 pm
I posted some photos of an engine with this type of conversion over in the other discussion - https://www.mtfca.com/phpBB3/viewtopic.php?f=5&t=10117
WOW, Those too are great reference. THANK YOU for posting those. All of this is great info to have.

The flywheel housing is Model B, I cant say for sure on the crank not seeing pictures of it, but it could be also a "B" if they whet through the trouble of doing the flywheel housing swap.


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Re: Speedster engine rear main sealing (Non T trans)

Post by katjack78 » Sun Mar 01, 2020 12:47 am

Dan.....I thank you very much for posting your photos on dry clutch conversion. There are of great help......John

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