Cylinder Head Runner Volumes

[Woodro Josey]

Its like closing the barn door after all of the cows have left the farm.

Tech Man you are so right!

[Myron Piatek]

Legitimizing "acid" porting or not, at least there will be a set number. It's been brought up here many times that the "higher ups" don't want to go through any more time, trouble and cost in tech than they have to. So bit by bit, the rules have been "generalized". (i.e.: stock cam lift but any duration, any spring pressure, etc.) Porting concerns/violations have been based on the tech person's interpretation anyway which can be difficult to prove or disprove by either party. With a set cc number, hopefully somewhat less than SS, at least there will be a clear limit. (I don't know how close the SS cc's are to average as-cast OEM numbers.) If they don't emphasize the as-cast port texture, perhaps that would reduce costs because any massaging wouldn't have to be covered up, which is where a lot of expense is. Of course, it would still be possible to weld, recontour, etc. and cover that up. There will always be people with the money and resources to get around any rules. But overall it should reduce the difference between the top and bottom qualifiers.

The down side is that Stock will be a little more like SS. But I would hope there will be enough differences to keep them seperate.

[zracer305]

You know I'm done with NHRA and done building an NHRA stocker. You will soon see all of stuff on sale in the classifieds. I'll build my car to NHRA standards safety wise and just build a 10.60 car to run PSCA.

[442OLDS]

Originally Posted by zracer305

You know I'm done with NHRA and done building an NHRA stocker.

Why?

[zracer305]

Originally Posted by 442OLDS

Why?

NHRA has no idea what they want to do. Rules on cylinder heads change every year. I was just quoated by an engine builder 1800.00 for a set of sbc stocker heads. If the rules say stock heads what modifications are they doing that cost 1800.00? I can buy a set of AFR 227 aluminum heads complete on ebay for 1500.00. I'm just sick of it.