Single cyl for head development use,,balance problems.

[SchmidtMotorWorks]

There was a V twin Gen 1 SBC that was designed for motorcycles about 35 years ago.
Some Harley guys were interested in them at the time.
Maybe one of them is still floating around.

[gmrocket]

There was a V twin Gen 1 SBC that was designed for motorcycles about 35 years ago.
Some Harley guys were interested in them at the time.
Maybe one of them is still floating around.

Huh, that’s interesting

Just read all about the supervee..quite the story

[ijames]

If you don't mind a 90 degree V8 with a second piston for balance, why not put it 180 degrees away from your test cylinder? That way you have perfect primary balance and only the rocking couple which should be less than the primary residual from a 90 degree V twin. Doesn't each bank of a V8 have two pairs of cylinders 180 degrees apart, so you don't need to put anything in the other bank.

[englertracing]

https://motochassis.com/freeware/
Its under balance calculator or something its a pc program

[SchmidtMotorWorks]

There was a V twin Gen 1 SBC that was designed for motorcycles about 35 years ago.
Some Harley guys were interested in them at the time.
Maybe one of them is still floating around.

Huh, that’s interesting

Just read all about the supervee..quite the story

The one I saw in progress was bought as a raw casting.
That might be useful if you are doing some other head bolt pattern.

If you want something exact to your needs, you could design it in CAD, then have sand cores printed and cast it. You might be able to get the casting done for about 1 or 2,000.

Do you have access to a machine shop?

[gmrocket]

There was a V twin Gen 1 SBC that was designed for motorcycles about 35 years ago.
Some Harley guys were interested in them at the time.
Maybe one of them is still floating around.

ok

Huh, that’s interesting

Just read all about the supervee..quite the story

The one I saw in progress was bought as a raw casting.
That might be useful if you are doing some other head bolt pattern.

If you want something exact to your needs, you could design it in CAD, then have sand cores printed and cast it. You might be able to get the casting done for about 1 or 2,000.

Do you have access to a machine shop?

I still think I’ll be using a complete V8 and just one rear corner cylinder...should also help to soak up the vibrations from what I hear....do you see any big problems with that thinking?

Yes I have a vertical mill, lathe, dyno and my son is a CNC machinist.

From what I read about those those supervee’s is the quality and machining is horrible...so I would be into quite a bit to just get it workable

So I’ll stick with the one hole of the full V8 which wouldn’t be too difficult,,my biggest concern was the balancing.

But from what I’m told here it’s not a problem

[SchmidtMotorWorks]

I guess it depends on what kind of head work you are going to do.

If you need multiple pieces to develop and test maybe it would be more efficient to just run the full engine assembly but only one cylinder at time.
Leave the valves out of the other cylinders.

That way you could develop 4 designs per head.
Not have to make any single cylinder heads.

Just make a single cylinder intake.