Benefits of an H pipe (flathead)?

[Bassman/NZ]

I posted this on the Hamb, and I'll post here as well.
My 28 A tudor has a C59A, stock with dual pipes and Smithy mufflers. Trying to decide whether to put in an H crossover ahead of the mufflers. Any benefit performance wise? How about the sound? Will it lose that flathead burble?
Thanks.

 

[billwill]

I posted this on the Hamb, and I'll post here as well.
My 28 A tudor has a C59A, stock with dual pipes and Smithy mufflers. Trying to decide whether to put in an H crossover ahead of the mufflers. Any benefit performance wise? How about the sound? Will it lose that flathead burble?
Thanks.

will sound different everthing helps

 

[Karl Wolf]

Like a heat riser, it will help to homoginize the back pressure... This will, imo, theoretically help performance... Gotta remember, though... We are talking flathead here... Karl

 

[KiWinUS]

U will never notice any difference !!!!

 

[billwill]

What is the differense its all enterainment

 

[Frank The Plumber]

I think this would have a lot to do with muffler type, The more restriction the more benefit, No?

 

[JWL]

If you read my book you will see the H-pipe made absolutely no difference under the test conditions outlined.

 

[Bassman/NZ]

I've got to admit, I did not really expect there would be a performance difference.... more about the sound really.

 

[41ford1]

I have to agree with Bassman. It's all about the sound. I think it would have the same affect as leaving the heat riser unblocked.

 

[BillM]

In my experience the H pipe got rid of the raspy "backfire" kind of sound when decelerating which I didn't care for but some like. Smoothed out the exhaust note for me.
'Course I don't like Harleys with straight pipes either; to each their own.