Runner Volumes

[Greg Hill]

This is one of the things that broke the camel's back as far as I'm concerned with the SRAC. Woodro has probably done as many stocker heads as anyone in the country over the years and given the changes in the rules; i.e. the valve rule change and the valve job rule change, the SRAC thought there should be runner volumes but they should reflect what the rule changes could mean. We talked to a lot of people to get input including some of the most prominent engine builders and head guys in the country and also some long time tech people from NHRA. The consensus was that the two rule changes could mean as much as 5 cc's on the intake and 3 cc's on the exhaust. Also if you had heads that were available with two different valve sizes and the heads had originally been poured with the small valves and you had an engine combination with the large valves it would help you with that change.

Our committee voted on this rule unanimously. This new rule change from NHRA is a punitive change that says directly we do not value your input and we are going to do whatever we want. In teardowns over the first part of last year on stock eliminator heads, 59 heads were poured and 48 of them were found to bigger that the super stock volumes. Of that number only three racers were disqualified. If you think your heads are okay you might be surprised. One set of heads that was poured was 17 cc's larger on the intake runner and was passed. If any of you are thinking about going to National events this year I suggest you take your heads off and pour them to see where you are.

Greg