Re: Within Stock rules???
 

Todd amen

Re: Within Stock rules???
 

Bill Jenkins engines were massively modified.
Hardly warmed over!
Custom Tunnel Rams which look like todays COPOs.
The Cylinder Heads were cut and welded together.
Special Alloy Pistons..Rods...cams and stable rocker systems.
Systems to reduce parasitic drag such as dry sumps.
Stuff we all can buy right off the shelf!
The 327 cuin was about the largest SBC engine to make power/weigh with back in those days.
No magic because the principles to make power then the same today.

One exception; the Big Three used a clean sheet of paper to incorporate all the best stuff developed in the past.
Even that stuff is not perfect enough to get another half second of power.
Super chargers and turbos were after thoughts.
Today they are integral as and entire designed package.
Supercharged B/G cars with huge Superchargers are today's Supercharged Super Stockers.

Just with 40-50 years of technology packaged and reclassified!

Re: Within Stock rules???
 

So modified heads are the only way to make power? The engines are not sold completely blueprinted it is still a manufactured product. it's made like that so owners/engine builders can finish the engine anyway they see fit within the rules. Same thing that has been happening since the early 60's

There is no other way to improve a combo? Tuning, testing ect? Just do the heads and let it rip?

Re: Within Stock rules???
 

The cylinder heads are also available unported and raw.

Re: Within Stock rules???
 

I would think clarity of the article would help. I reread the article and title of article and could not find the words "building a factory stock shootout engine." Sounds minor but would clear up this confusion about allowing heads to be ported with a cc max because NHRA can not police it in stock.

Re: Within Stock rules???
 

I never mentioned heads, or any other part(s). You said "These cars were build in a max effort capacity to begin with by a company that has every resource." and "The engines are not sold completely blueprinted it is still a manufactured product. it's made like that so owners/engine builders can finish the engine anyway they see fit within the rules."

Which is it?

Re: Within Stock rules???
 

That kinda depends on which side of the rules you want to walk on, doesn't it?

Re: Within Stock rules???
 

Not necessarily, I think max effort and the performance that comes with it is possible without crossing any lines regarding rules, but that's just my definition.

Re: Within Stock rules???
 

I mean head design, materials used like Ti valves and retainers. Cranks, rods, and other special parts.

I guess is what I'm trying to say is that the CNC program that is used to profile the heads I'm sure has been researched and pretty close to the best you can buy. IMHO.

I think unless you have spent time with one of these engines you don't realize how good the parts are that used in these engines.

Re: Within Stock rules???
 

These cars are all certainly "stock eliminators"!!