revs vs mph

[adrian455]

Does anybody know a formula to work out how much mph will be gained vs revs
rxtx 260 with a 14/19 solas now stock with 4 inch air but looking to add about 300 to 400 rpm in a tune.

Somebody must have a guide for rev vs mph for a given prop.

I am trying to work out if i should change prop or tune , i can also re pitch .

Currently i have no tune and a 14/19 solas with 4 ince air stopping at 67 mph

[John's truck]

Seriously? Are you trying to post this enough times to get access to the Classified section to post it there too?

[troyheb]

Seriously? Are you trying to post this enough times to get access to the Classified section to post it there too?

Dont be mean to this guy or K447 will erase your post.