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-   -   Why did nhra change the cam and valve spring rule in 1985? (https://classracer.com/classforum/showthread.php?t=26781)

Pat6868 07-02-2010 10:32 AM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
If you check out the rules for IHRA pure stock you find a class thats in line with the original intention of stock eliminator. A person can put together a competitve car for a lot less money. If rules are enforced theres no problem. As far as reliability, while I don't race as much as most, my 327 has been in the car for 5 years without freshening and only minor repairs and still runs the number. Pat

art leong 07-02-2010 10:46 AM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
Quote:
Originally Posted by Casey Miles (Post 195660)
NHRA told the prostock teams "NO EXOTIC MATERIALS IN THE ENGINES" , why is it allowed in stock eliminator? Schubeck lifters are made from an exotic material the last time I looked. You can't buy them at any local auto parts store that I know of.
NHRA doesn't want to do their job on policing rules and for that matter what we pay for from them when we buy our memberships. NHRA is streamlining for their benefit not to have to enforce rules that should have been kept up with, like valve spring pressures. The cars in stock would not be running 1.0 under if the valve spring pressures where set to factory spec. for sure. The valve spring spec on my 302 engine was 96 lbs on the seat and 204 lbs open pressure, no way could you get the motor to 8k rpm. Now, they are changing gears at 8200 rpm.
My vote is to go back to enforcing an across the board valve spring pressure so that you have to use stock (buy in any auto parts store) lifters again.

Casey Miles
248H
An across the board number is no better than what you have now. Heavier valves need more spring pressure to control the valve. If you went back to using the specs that would be more equitable. But still not perfect.

James Perrone 07-02-2010 10:46 AM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
You guys need to get a TIME MACHINE...
They make the rules as you go along.

Casey Miles 07-02-2010 11:14 AM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
The problem is that they change the rules as they go along. Instead of ***** footing around, why not allow roller cams to match the newer engines with roller cams and also fuel injection while we are at it. Did I also miss crank trigger?
The rules in stock, should be stock and not with all the after market parts that don't belong. I like it to see someone squeeze out HP with limited parts to their disposal, with controlled regulations and not just put in (full advantage) after market parts that they find on the shelf. I'm sure most of the time, NHRA will accept parts, if we pitch a bitch enough about how hard it is to get originals even if their are plenty of those originals still around.

Casey Miles
248H

X-TECH MAN 07-02-2010 11:32 AM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
Quote:
Originally Posted by Pat6868 (Post 195668)
If you check out the rules for IHRA pure stock you find a class thats in line with the original intention of stock eliminator. A person can put together a competitve car for a lot less money. If rules are enforced theres no problem. As far as reliability, while I don't race as much as most, my 327 has been in the car for 5 years without freshening and only minor repairs and still runs the number. Pat
I wrote the rules for pure stock.....the problem is the enforcement of the rules.

Billy Nees 07-02-2010 01:25 PM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
[QUOTE=X-TECH MAN;195663] That would eliminate just about every NHRA car that wanted to cross over and the car counts are low enough already.

I think that you'll find that NHRA doesn't want Stockers "crossing over" to SS!

X-TECH MAN 07-02-2010 01:37 PM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
[QUOTE=Billy Nees;195742]
Quote:
Originally Posted by X-TECH MAN (Post 195663)
That would eliminate just about every NHRA car that wanted to cross over and the car counts are low enough already.

I think that you'll find that NHRA doesn't want Stockers "crossing over" to SS!
I meant if the NHRA stockers wanted to run IHRA stock....... If IHRA changed the valve spring rule to a max seat and open pressure for stock IHRA would loose ALL of the NHRA stockers wishing to race with them unless they ran S/S because of the NEW valve spring pressure rule. .

Dwight Southerland 07-02-2010 01:48 PM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
I am with you guys on this one. The current valve spring rule was the most expensive hit NHRA has done to Stock Eliminator racers. I agree with you, Terry, that if they would set a max of say 135-140lbs on the seat and 350 or so at .500" compression the cost of an engine would decrease, the reliability and down-time would increase and the smart guys would have another avenue to snooker people with.

If someone would start a referendum, maybe we could exert some pressure on them. Lots of people would benefit.

X-TECH MAN 07-02-2010 02:02 PM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
Quote:
Originally Posted by Dwight Southerland (Post 195751)
I am with you guys on this one. The current valve spring rule was the most expensive hit NHRA has done to Stock Eliminator racers. I agree with you, Terry, that if they would set a max of say 135-140lbs on the seat and 350 or so at .500" compression the cost of an engine would decrease, the reliability and down-time would increase and the smart guys would have another avenue to snooker people with.

If someone would start a referendum, maybe we could exert some pressure on them. Lots of people would benefit.
Thank you.......RPM is the main killer and cause for expense not to mention all of the other "Stuff" that is being done to take advantage ot the RPM ranges the stockers are being run in today,

Mark Yacavone 07-02-2010 02:34 PM
Re: Why did nhra change the cam and valve spring rule in 1985?
 
You guys are forgetting the fact that many of the current crop of racers would have trouble just getting the valve covers off. Forget about monitoring spring pressure.
Not banging on anyone in particular. That's just a fact of life.


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