B2 Riva Red or B2 FP dry pipe compatibility for B1

[ItsRixter]

Hi folks,

Looking to potentially swap a 760 into a B1. That said, the exhaust manifold needs to match the porting of the 760 cylinders. Since I am looking at 760 manifolds/ pipe, I was wondering if anyone can confirm if the Riva or FP B2 pipe setups will fit into a B1? This would help set the exhaust into the right location for me to also perform the rear waterbox conversion.

Any first-hand experience is appreciated.

 

[Storbeck]

I can tell you that I have run a 61x B-pipe on a 64x cylinder (760) by putting helicoils in the bolt holes so that an m8 bolt can be used, and a little "porting" of the manifold to match the cylinder, seemed to work.

But, your solution is probably better, and I'm no help there.

 

[TheBuzzard]

I guess you never seen a B2 AM pipe. they look nothing like a b1 pipe. pipes are always hull specific, not motor specific. just use a b1 pipe and put a 62T exhaust manifold gasket on the b1 pipe manifold and port match it. it takes very little grinding.
62T cylinders use 10mm bolts to secure the manifold. 61x uses 8mm bolts. depending on the manifold and access to the bolt heads, you may have to put helicoils in the 760 62t cylinder and use 8mm bolts.
8mm bolts can have 12mm head, which is easier to get to in tight spaces than the 14mm head that most 10mm bolts come with.

 

[Quinc]

Also look at the waveraider exhaust. Similiar to b1 exahusts but the outlet points back for rear waterbox.

 

[CARBONX2]

B2 dry will work if you put a watebox behind firewall, just like a B2 has