switching to VM-38 carb on my Invader

[invader87]

I did confirm last night that I am running 270 mains on my 78

[Tory944]

News flash....    you know when you check those little numbers on the carburetor boss...   the ones stamped 32...34...36mm  and on?  Well, it might surprise you that most 36mm carburetors do not measure 36mm!!  I found found differences as little as 1 mm between 38's and 36's.  With this said, when a discussion over whether to use 36 or 38's comes up, I see very little jetting differences between the two.  Also, the performance gains between the two are barely worth contemplating.   

[invader87]

I had a set of 38s laying around and was tired of changing econojet orings. that's the only reason I swapped mine.

[Interceptor398]

I had a set of 38s laying around and was tired of changing econojet orings. that's the only reason I swapped mine.

Do you run non ethanol, oxygenated gas?  Ethanol will eat rubber and attract water.

[invader87]

38s and 36s are very close. So why is is so difficult to imagine running less than a 300 main jet?