FrontEngineDragsters.Org Forum

Drag Racing Discussions => Front Engine Dragsters => Topic started by: jspell on June 19, 2014, 05:07:31 AM

Title: A/ND & B/ND
Post by: jspell on June 19, 2014, 05:07:31 AM

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

Title: Re: A/ND & B/ND
Post by: rooman on June 19, 2014, 07:30:56 AM

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

Title: Re: A/ND & B/ND
Post by: dreracecar on June 19, 2014, 09:08:12 AM

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

Title: Re: A/ND & B/ND
Post by: JrFuel Hayden on June 19, 2014, 09:15:19 AM

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.

Title: Re: A/ND & B/ND
Post by: dreracecar on June 19, 2014, 09:49:10 AM

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???

Title: Re: A/ND & B/ND
Post by: Cajuninjector on June 19, 2014, 10:21:18 AM

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.

Title: Re: A/ND & B/ND
Post by: hotrod316 on June 19, 2014, 03:16:09 PM

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

Title: Re: A/ND & B/ND
Post by: masracingtd1167 on June 23, 2014, 02:52:30 PM

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 .