3 or 5 brg camshaft

[rer_239]

did an engine made in nov 1928 have a 3 or a 5 brg camshaft. i bought an incomplete block that didn't have a cam.
thanks
dick

[Jim Brierley]

If your block was made for the 5 bearing cam, it would have obvious 5 bearing webs. If for the 3 bearing it would just have the same 3 as the crank has. There were three different 5 bearing cams. The first had all 5 bearings finish-ground to the same size, the second had the 2 intermediate bearings also finish-ground but to a smaller diameter and the third they were rough-cut. This was to make it easier and quicker to install the cams in the 3 bearing block.

[rer_239]

looks like i have a 3 brg. block.
thanks
dick

[Purdy Swoft]

The three bearing cam will also work in the five bearing block .

[Jim Brierley]

And vice-versa.

[Chuck Sea/Tac]

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Originally Posted by Jim Brierley

And vice-versa.

I hope so, cause I put a five in a three.

[Pete]

Originally Posted by Chuck Sea/Tac

I hope so, cause I put a five in a three.

I too, put a 5 in a 3.

[hardtimes]

Originally Posted by Pete

I too, put a 5 in a 3.

Hey Pete,
Looks like a 5 in a 5 that is/was a three !
Pretty tricky !
How durable is that ?
It appears to be welded in at the base. Is that so, or just how do you keep it in place ?

[Pete]

Originally Posted by hardtimes

Hey Pete,
Looks like a 5 in a 5 that is/was a three !
Pretty tricky !
How durable is that ?
It appears to be welded in at the base. Is that so, or just how do you keep it in place ?

The aluminum blocks are pinned and bolted in and then align bored. The cam runs directly in the aluminum. Full pressure oiled. It lasted 2 seasons on the circle track and a year of just driving around with an occasional hill climb.
The cam was fabricated from an original A cam with welded up lobes and sleeved up journals. .488 lift.
As far as I know it I still running in a vintage sprint car.

[hardtimes]

Originally Posted by Pete

The aluminum blocks are pinned and bolted in and then align bored. The cam runs directly in the aluminum. Full pressure oiled. It lasted 2 seasons on the circle track and a year of just driving around with an occasional hill climb.
The cam was fabricated from an original A cam with welded up lobes and sleeved up journals. .488 lift.
As far as I know it I still running in a vintage sprint car.

Hey Pete,
You do nice work, indeed !

Aluminum block, hm must be a modern age banger block, eh ?
Wish you were closer, I’d have you look at B aluminum block, to work your magic on !
It has a 5 bearing ‘28 cam in it also
I’m not good at this and most likely get the hp/performance like it is capable of, as I know you would get.
A friend got 155 on his block, on a dyno, he tells me!
I’d bet $ you could get more !!
I’ve heard that it can work with 200, but that seems like a pipe dream, eh.

[Pete]

Originally Posted by hardtimes

Hey Pete,
You do nice work, indeed !

Aluminum block, hm must be a modern age banger block, eh ?

I was referring to the aluminum block bearing housings.

Wish you were closer, I’d have you look at B aluminum block, to work your magic on !
It has a 5 bearing ‘28 cam in it also
I’m not good at this and most likely get the hp/performance like it is capable of, as I know you would get.
A friend got 155 on his block, on a dyno, he tells me!
I’d bet $ you could get more !!
I’ve heard that it can work with 200, but that seems like a pipe dream, eh.

It takes more than 200 to win the Antique Nationals.

...

[hardtimes]

Yup, my mistake. Had aluminum on my mind !