Exhaust Manifold Question

[Ohiobugeye]

I was ready to start a re build on my 948 cc engine for my Bugeye and happened to come across a rebuilt 1275. The 1275 is missing the flywheel and the exhaust manifold. Will my 948 exhaust manifold work on the 1275? I see in the parts catalogs both engines use the same manifold gasket. I will be using the standard bugeye 948 exhaust pipe. I also will be using either my 1-1/4 S.U. carbs or a Weber. As for the flywheel, I'm almost sure the 948 flywheel won't match up on the 1275. Any answers? Thanks

 

[jlaird]

948, 1075, and 1275 exhaust manifolds are interchangeable except that the 1275 uses a differnt pipe and connection. The 1275 likes a larger exhaust for back preassure reasons.
The 948 manifold is awful, a 1075 works better and hooks up to pipeing the same as the 948.

A 1275 exhaust manifold should not be hard to find eBay or here maybe, and the pipe etc. is available.

The H2 is the correct carb for a 1275.

Flywheel is the same on all these engines.

 

[Whitephrog]

Even if the 948 manifold will work, why not upgrade to a better performing manifold that will enhance the performance of the 1275?

 

[jlaird]

That was my point, use a 1275 engine, should use a 1275 exhaust system.

 

[Ohiobugeye]

Will the 1275 manifold and the later 1275 exhaust pipe, muffler and hangers fit on the Bugeye?

 

[jlaird]

Of course.

 

[bugimike]

I have a couple of 1275 manifolds knocking around the parts bins that I am not using since I put the header on. I would like to keep one in case I ever need to go back to stock, but you are welcome to the other if you want it. Email me.

---------
Mike
59 Bugeye
69 Sprite

 

[Bugeye58]

Sorry, but the flywheels are NOT interchangeable between a 948 & 1275.
Jeff

 

[ChrisS]

I have a 1275 flywheel if you need it.

 

[jlaird]

Sure glad someone, thanks chris, caught that screw up.

 

[Ohiobugeye]

Hey All, I got the 1275 engine today.....Santa came early.I have contacted Mike and Chris about a flywheel and manifold. As always, you guys REALLY come through!!! Thanks Don

 

[jlaird]

Way to go, the extra power is going to be awsum.

 

[bugimike]

Don, I have not recieved anything. Try again!

---------
Mike
59 Bugeye
69 Sprite

 

[Hap Waldrop]

And I can lighten that 1275 flywheel if you like /ubbthreads/images/graemlins/smile.gif

 

[jlaird]

I wondered who lightened flywheels. Gesh, I should have known. No one around here.