Author Topic: A/ND & B/ND  (Read 6718 times)

Offline jspell

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A/ND & B/ND
« on: June 19, 2014, 05:07:31 AM »
What is the difference between these two classes?  type of engine?
thanks

Offline rooman

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Re: A/ND & B/ND
« Reply #1 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
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dreracecar

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Re: A/ND & B/ND
« Reply #2 on: June 19, 2014, 09:08:12 AM »
The difference is measured in $$$$$$$$$$$

Offline JrFuel Hayden

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Re: A/ND & B/ND
« Reply #3 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.
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dreracecar

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Re: A/ND & B/ND
« Reply #4 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???

Offline Cajuninjector

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Re: A/ND & B/ND
« Reply #5 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.
Go Hard or Go Home

Offline hotrod316

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Re: A/ND & B/ND
« Reply #6 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

Offline masracingtd1167

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Re: A/ND & B/ND
« Reply #7 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 .