A/ND & B/ND

[jspell]

What is the difference between these two classes?  type of engine?
thanks

[rooman]

Both are 3.5 lbs/cu in, 1300 lb minimum but B is restricted to OEM heads for Hemi and Fords and 23 degree Chevy. In B the head must be NHRA accepted and a max of + or - 3 angle milling of the head is allowed.

Roo

[dreracecar]

The difference is measured in $$$$$$$$$$$

[JrFuel Hayden]

Actually there is no difference in $$$$$, it costs as much to build a A/ND as a B/ND, just different part numbers.
B/ND can run raised runner 23° SBC iron heads, but limited to 2 7/8" injectors.
A/ND can run any valve angle, and they can run Hilborn rotary injectors.

[dreracecar]

No difference between a 6.80 and 7.20 as far as cost??? then why even have a "B" class, everybody wants to go fast.

  Rims???

[Cajuninjector]

I agree with Jon.
To make ours a/nd all we'd have to do is replace heads and injectors.
Not to mention the money spent trying to make b/nd heads flow good.

[hotrod316]

john,
 i thought the rotary was outlaw this is not true?
we run the rotary $4500  5 years ago? it was cool.
but no help
steve m

[masracingtd1167]

In Comp it all boils down to what class has the softest index ! I would think that B/ND might be a little tougher because of the head restrictions .