recommended exhaust

[elev8_dude]

Wanted to know what exhaust size and system would best benefit my type 1 1915 dual 44 weber engine.

[gonebuggy]

Well are you running heater boxes or not? if not; I'd get a 1 1/2 merged header and choose a style of muffler that suits your tastes. Phatboys are noisey as fook, but look the best in my opinion.

Im running this combo on my 1956cc and i dont think you can beat it for price/quality. but like i said it's LOUD!

http://www.cip1.ca/ProductDetails.asp?ProductCode=ACC%2DC10%2D6021
http://www.cip1.ca/ProductDetails.asp?ProductCode=C13%2D3701

The header comes raw but clean it well and throw some high heat paint on and it will look good for a season or so.


Alex

[elev8_dude]

no heater boxes. I'm sort of running that now except for the fatboy. Is there any advantage to going 2"?

[gonebuggy]

2" tubing for the header? thats WAAAAY overkill.

1 1/2 is the biggest i'd recommend for your size motor. If you go to big then you loose some of the restriction needed for "scavenging".

Although a poor flowing exhast is a bad thing, one that flows too well is equally as bad.

how big are your exhast ports on your head? i bet that they are 1 1/2 or smaller?
For example if your exhaust ports where the flanges bolt up are 4 inches, why would you use a 6 inch exhasut pipe? You make no gains because the head opening will only allow so much to exit, and as i said earlier scavenging....

1 1/2 is perfect for that size motor. But that's just my opinion.

Alex

[JIMP]

Hello

as Alex said, 2" is too big for your application, I will run a 2" collector on a 2387 engine with 48X40 valves and still the first 35cm of each primary is made of 1 7/8 tubing and then continuous with 2", just my opinion also..

Friendly

JIMP

[elev8_dude]

thanks for all the info. I will run with your suggestions.