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-   -   5 main, chev, crankModel A engine (https://www.fordbarn.com/forum/showthread.php?t=179683)

George Miller 10-05-2015 03:09 PM

5 main, chev, crankModel A engine
 

1 Attachment(s)
I know this is not for ever one, so don't look if you do not want to see a chev crank in a, A engine.

After a couple of years I'm back working on this engine. Today I started to make rods for this engine out of 7075 Alum. I made a wooden one first to make sure my math was right. If there is any interest I can post some pictures of making the rods along the way. This engine will be for my home built over head cylinder head.

Juggler 10-05-2015 03:21 PM

Re: 5 main, chev, crankModel A engine
 

Interest here

Pics please Mr Miller

Kohnke Rebabbitting 10-05-2015 03:24 PM

Re: 5 main, chev, crankModel A engine
 

Quote:

Originally Posted by George Miller (Post 1167783)
I know this is not for ever one, so don't look if you do not want to see a chev crank in a, A engine.

After a couple of years I'm back working on this engine. Today I started to make rods for this engine out of 7075 Alum. I made a wooden one first to make sure my math was right. If there is any interest I can post some pictures of making the rods along the way. This engine will be for my home built over head cylinder head.

Oh, Ya, George! PICTURES.

Herm.

George Miller 10-05-2015 03:29 PM

Re: 5 main, chev, crankModel A engine
 

Ok I will take them after each operation. Also I will be using 283 Chev pistons.

super flat 10-05-2015 03:30 PM

Re: 5 main, chev, crankModel A engine
 

George, Whittle away and lots of pictures please! Gary

Cockshutt Kid 10-05-2015 04:08 PM

Re: 5 main, chev, crankModel A engine
 

Would love to see more about the crank installation also. Is that a timing chain that I see? That looks real interesting.

Vicky 10-05-2015 04:09 PM

Re: 5 main, chev, crankModel A engine
 

I'm watching, interesting

George Miller 10-05-2015 04:11 PM

Re: 5 main, chev, crankModel A engine
 

2 Attachment(s)
Day one. The picture of putting in wrist pin holes. Also the wooden rod that I made to make sure my math was right. Also to make sure it cleared every thing in side the engine. The alum rods will be a little different in shape.

flatford39 10-05-2015 04:16 PM

Re: 5 main, chev, crankModel A engine
 

Please keep the pics coming. Are you building a racing motor for the salt flats???

George Miller 10-05-2015 04:25 PM

Re: 5 main, chev, crankModel A engine
 

Quote:

Originally Posted by flatford39 (Post 1167816)
Please keep the pics coming. Are you building a racing motor for the salt flats???

No Just wanted to do it. I wanted to use it with the cylinder head that I made a few years back.

George Miller 10-05-2015 04:27 PM

Re: 5 main, chev, crankModel A engine
 

Quote:

Originally Posted by Cockshutt Kid (Post 1167813)
Would love to see more about the crank installation also. Is that a timing chain that I see? That looks real interesting.

Yes. I will see if I have any pictures of when the crank was put in.

JohnTee 10-05-2015 04:58 PM

Re: 5 main, chev, crankModel A engine
 

Thanks for this post Mr. Miller. How about some specs on the crankshaft. Been trying for some time to find one like this. Never thought to look at chev as the source.

Rex_A_Lott 10-05-2015 05:21 PM

Re: 5 main, chev, crankModel A engine
 

NIce! Never seen anybody whittle a rod out of barstock. Good Luck:)

Russ/40 10-05-2015 05:41 PM

Re: 5 main, chev, crankModel A engine
 

Im most curious how you handled the cam lobe timing.

George Miller 10-05-2015 06:04 PM

Re: 5 main, chev, crankModel A engine
 

Quote:

Originally Posted by Russ/40 (Post 1167850)
Im most curious how you handled the cam lobe timing.

Used the chev cam that went with the crank.

Miles in MN 10-05-2015 06:14 PM

Re: 5 main, chev, crankModel A engine
 

Quote:

Originally Posted by George Miller (Post 1167857)
Used the chev cam that went with the crank.

What is the source of the Chev crank and cam? Are they early or are they from the 153 cid overhead? Didn't Chevrolet transition from four to six cylinder in 1927 or 28? Very interesting project!!

Ron W 10-05-2015 06:51 PM

Re: 5 main, chev, crankModel A engine
 

It looks like the center lines of #2 and #3 journals may be offset from the bores? I'm curious how you will handle that. Ron W

George Miller 10-05-2015 06:58 PM

Re: 5 main, chev, crankModel A engine
 

Quote:

Originally Posted by Miles in MN (Post 1167863)
What is the source of the Chev crank and cam? Are they early or are they from the 153 cid overhead? Didn't Chevrolet transition from four to six cylinder in 1927 or 28? Very interesting project!!

They went to the 6 cylinder in 29. The crank is from a V8, so you can not use the A cam, because the A is a flat crank. The chev is 90 degree crank. The valve timing would be wrong.

The 153 crank would be great, but it is to short for the A block. The A block is wide between 2,3 cylinders because of the dist. going through the head and into the block.

AL in NY 10-05-2015 07:30 PM

Re: 5 main, chev, crankModel A engine
 

George, I don't think you can get a "smooth" firing order using the V8 90 degree crank. Depending on how you set up the valve timing, a 720 degree firing cycle would go 180-90-180-270 or 180-270-180-90. You can't get 180 degrees of crankshaft rotation between each of the 4 cylinders in the firing cycle. Seems to me the engine would run ruff.

Tom Wesenberg 10-05-2015 07:46 PM

Re: 5 main, chev, crankModel A engine
 

Yep, as Al said..........I wonder if it will sound like a pair of John Deere tractors running together?:confused::D

It will be interesting..........as well as a lot of work. What is the stroke?


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