Bigger Pushrods & Guideplates Legal in Stock now

[SSDiv6]

Originally Posted by Dave Noll

In case anybody missed it, NHRA posted this in "2008 Rules revisions" yesterday.

Stock Cars

Section 9A

Engine: 1

Page 136 (05/08)

Camshaft/Lifters: Delete last sentences of paragraph and replace with “Larger diameter pushrods permitted. Pushrod guide plates permitted. Cylinder head may be clearenced for larger diameter pushrods.”


Dave

Does the rule means that cars such as the Ford small blocks, Oldsmobile and Buick engines can runs guide plates? The interesting part of this rule is that for many years, many cars have been running larger pushrods. Prior to this rule change, there has never been a published specific pushrod diameter available.