Ever read the rquirements for an LT1 Stock Eliminator head? Kinda makes me wonder why we go out and spend BIG dollars for Aftermarket heads when I read articles all the time saying how good the LT1 head is. And you can't beat the performance when you look at the timeslips. I know, "they run radical cams that wouldn't hold up on the street" Have you talked to anyone running Stock Eliminator with one of these motors? You'd be surprised at the profiles they run. At any rate even in a bracket only LT1 you could get 3500# cars into the mid 10's with the Stock configured head. I'm gonna try it anyway.

 

I personally have a real zest for doing a lot with very little and specifically N/A performance.

Don't get me wrong I love my bottles and blowers, but theres something about N/A power that stands alone.

 

Yes, it's a pet peeve of mine when people say that "the cam doesn't match the heads", or "the cam doesn't match the intake". The stock eliminator guys use way big cams, even on TPI 305's that run in the 11's.

As far as the heads go, the rules are very strict. I'm pretty sure they state that they can't be ported at all. The only work that's allowed is a valve job and re-surfacing. You even have to use the stock size valves.

Some people stick to the "intent" of the rules, while others do everything they can get away with and still meet the "letter" of the rules.

For instance, the "Launcher" series of cam lobes. The stock eliminator class does not allow more than stock lift. The "Launcher" lobes keep lift at stock. However, at high rpm, the lifter launches off the cam to get more lift. It's legal, but doesn't meet the "intent" of the rules, which is to keep stock lift, even when the engine is running.

As far as the heads go, I'd be willing to bet that the top teams are spending upwards of $5000 on a set of "stock" heads. There are all sorts of things that can be done and still meet the "letter" of the rules. For instance, they can cut the seat for a larger valve, but still keep the 1.94's. The valve will seal on the inner edge of the margin and act like a larger valve. They also do full-radius valve jobs that can extend quite a ways into the bowl and chamber. It's almost bowl and chamber porting. They'll deck them at an angle to get the valve angle down to the minimum allowed 22.5 deg instead of 23. Etc. There's another big mod they can do that I'm not at liberty to discuss. BTW they cc the intake runners to make sure they're not ported.

There's a dirt track class called SUPR. The rules are: 355 cid, flat top piston, Brodix SUPR head (23 deg, standard port location) unported, single 750 carb, any cam. A local engine shop took a shot at building one and made 580 hp on their first attempt, which was about average. Since then, they've made 675 hp under the same rules and are winning every race. Can you imagine spending $23,000 on a basic roller cam 350?

Mike

 

There is a guy on LS1Tech.com that goes by Gizmo who knows his stuff as far as Stock Eliminator, guessing he wont share secrets with you but I am sure he would help get you started.

 

Nick, if I pm you some info would you take a look? You guys do heads or send them off?
Skip

 

A little bit of both depending on the job. Some things we have a designed CNC program that works and others we have to design a port for our application specifics.

Drop me a PM.