Doug Linke GT/MA DQ'D ?

[SSDiv6]

Originally Posted by Travis Miller

Reasons for pulling a cylinder head of a Modified class engine.
1. To measure the bore and stroke in order to calculate the cubic inch
2. To measure the bore center spacing dimension.

Page 168 (Section 10F - Modified) of the 2008 NHRA rulebook under ENGINE, 4th sentence reads: "OEM bore center spacing mandatory."

There are even Comp classes where OEM bore center spacing applies. Many other classes have a ruling on bore center spacing dimensions including Pro Stock, Funnycar, and Top Fuel. Those dimensions are measured with the cylinder head removed.

Travis

(Disclaimer: Opinions expressed by me on this forum are exactly that, my opinions.)

So...do you guys gave up on pumping the engine for CID measurement? Do not get me wrong, I am not being a critic; I like your new approach. Will there be any enforcement for those using the Aurora block, GM P/N 24502650? (a.k.a. Pro Stock Truck Class block - 8.1" Deck and requires an adapter for its use with a GM pattern bellhousing)