Drag Racing Discussions > Front Engine Dragsters

A/ND & B/ND

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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???

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