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2/02/2008

NTPA Tech Services Update!!!!


2/1/08

Question:

Richwine,

I'm trying to get my inner sidshields on before Louisville. You must have taken the rule off the tech page, I can't find it here and it's not in the 07 rulebook. What is the sideshield rule?

Answer:

That rule was in effect for the 2007 season starting on July 20th. It's in the 2008 rulebook but, for you and all the others that haven't seen the new rulebook here it is:

H. (pg. 24)

1. j. All inline engines are required to have an additional inner side shield consisting of .125 (1/8) thick steel or titianum or .250 (1/4) aluminum inside the current .060 steel or aluminum side shields with a minimum of 1/2 inch air gap. This shield is independent of the current sideshield and must be attached to the vehicle chassis (frame) with a minimum of 5/16 fasteners at both ends and center on the bottom and to the engine block at both ends (bolted solid or with a length of 5/16 chain) at deck height on the top. This shield must extend from the bottom of the head to the centerline of the crankshaft and extend the full length of the block on each side of the engine.

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Question:

Larry,
I pull a prostock CASE and I have been asked to run 3 cables around the heads due to the fact they are individual heads by another group. Although they are individual, there is a 1/2 plate( 1/2 by 6" x 34") on both sides of the heads to attach our manifolding and to help keep alignment. Can I just run the 1 cable with NTPA , with some of the pro's starting to section blocks I want to make sure if something does happen , that the head should be directed forward as intended. With the 3 cables I don't don't feel as comfortable.

thank you,
tim

Answer:

One cable is enough if you have the heads tied together by the 1/2 inch material you say you do. The rule is listed below from the 2008 NTPA rulebook:

p.24
1. k. All inline turbocharged engines are required to have one cable that must surround the engine block and head. This cable must be placed between first and second cylinder through exhaust manifold port area.

a. Cable must be a minimum of 3/8-inch thickness.
b. Cable must have a minimum of (2) clamps at the splice.
c. Cable must have no more than 4 inches of slack.
d. Multiple-head engines require one cable per head unless tied together with a steel (non-cast) manifold.

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