Ok, I'm looking for a 44mm Super BN carb for my project

[Minidragbike]

Finally went and got my head out of storage, and took a couple measurements. It has almost a 42mm port opening, and slowly tapers a little down to 39.5mm at the seat I.D. The intake valve is 42.5mm

A picture of the port , so anything in the 30's won't work. Head flows just over 200cfm. http://i88.photobucket.com/albums/k168/minidragbike/20140213_114058_zpsexuz2adx.jpg

 

[mikelavite#72]

dang charles i had one but its gone now !! but i think i could know where another is at

 

[Jon Brogden]

Heck Mini, now that your up to 44mm you need to look at the new 44 Tilly it's a big bad boy, too big for most karting apps. It's in production on gas, it's needs some development for alky. Jon

 

[Minidragbike]

Thanks Jon I will think about it. I'm gonna end up cutting some flow back. I remember I have the flow data on the 44mm Super BN somewhere.

 

[TS Motorsports]

Thanks Jon I will think about it. I'm gonna end up cutting some flow back. I remember I have the flow data on the 44mm Super BN somewhere.

hey charles i was just thinking with that head cutting down that much before going into the cylinder are you gonna have alot of turbulence in the air flow with that big of a carb?

 

[Brian Montgomery]

Heck Mini, now that your up to 44mm you need to look at the new 44 Tilly it's a big bad boy, too big for most karting apps. It's in production on gas, it's needs some development for alky. Jon

Jon where can I find info on the Tilly 44mm?

 

[Minidragbike]

hey charles i was just thinking with that head cutting down that much before going into the cylinder are you gonna have alot of turbulence in the air flow with that big of a carb?

Not really, Cars are 10x worse than that. My other head, a smaller version of this one has a 35mm carb with a 34mm opening. And it has a 31.5mm seat I.D.

 

[Jon Brogden]

Hey Brian, Carol has one or two at EC Dist. , that's where I saw one, I didn't flow it but it looks like it would outflow the 44 SBN, it doesn't have all the restrictions in the V. like the Mikuni does. Jon

 

[TS Motorsports]

Not really, Cars are 10x worse than that. My other head, a smaller version of this one has a 35mm carb with a 34mm opening. And it has a 31.5mm seat I.D.

ok i was just wondering. i knew cars had a terrible turbulence problem in air flow but i didnt know how much of an issue it was gonna be here

 

[azrcr]

I have a bn 44, but the stacks are not withthe carb, I'll look for them if your interested.. Mike

 

[PD Power]

Finally went and got my head out of storage, and took a couple measurements.

You say your head was in storage?

 

[andy_white]

Charles, is that 200cfm with valve installed and what lift?

 

[Minidragbike]

Charles, is that 200cfm with valve installed and what lift?

.500" lift, and it's 211cfm with 1.675" intake valve in it