Visit The Dirt Forum for More Information

Author Topic:   new rules
hoosier transplant
Dirt Maniac

Total posts: 104
posted November 08, 2005 05:05 PM  
I run a Super Stock class and they have changed the rules for next year. They have went to a 360 cubic inch max with a cam that is .540/.560. I was running a 396 stroker with a weight addition and a 4412 carb. Motor stayed up or was faster than most and only was turning 6000-6200, which is what I wanted when I had motor built. I didn't want to turn 8500 like all the 355's because I didn't have money to build new motors during the racing season. My question is does the restriction of the new cam hurt a 355 more or less than a stroker? I am not a motor man so this may sound like a dumb question to those of you that are, but I have questions. Can you take a 327 and stroke it and have a torkier motor? Also, last year there was a 500 pound weight penalty if you ran a 6 cylinder. This year it isn't in rules at all. Would this be another option? Rules have dropped min weight from 3000 to 2750. Just trying to get some ideas because I never like to "follow the leader".

Dirt Maniac

Total posts: 158
posted November 08, 2005 05:41 PM  
I just got a look at the new rules myself. First, a 327 is a 4" bore, just like a 350, but a shorter stroke. You could try stroking a 305, but I don't know how much bang-for -the-buck it will get you. As for the cam rule, you can make decent power within the specs, but it basically does away with the roller cams. One thing I noticed, was that now they will allow you to run a cheater button. That should allow some of the poor boys to run with the bert/brinn crowd. I'm a little confused with the changes to the rear suspension. I run an OEM four link, and the rules don't say it's legal. I'm pretty sure it is supposed to be and probably just got omitted.

Dirt Forum Champ
Total posts: 5390
posted November 08, 2005 06:10 PM  
Weight PENALTY for a 6 cylinder?!?

-stand on it-

Dirt Maniac

Total posts: 158
posted November 09, 2005 10:30 AM  
Originally posted by DJR22:
Weight PENALTY for a 6 cylinder?!?
Actually, I believe the weight penalty was for the Barnett Series Modifieds. It was 150 Lbs mounted infront of the front cross-member. They had so many weight penalties in the Super stock rules, it may have been in there too - I lost track.

Dirt Maniac

Total posts: 112
posted November 11, 2005 08:00 AM  
One thing to remember that you didn't post about the cam is their measuring it a zero lash. Valve lift rule: .540 intake, .560 exhaust, measured at zero lash. I'm not a Cam guy so what exactly does that mean on the track web site I've been seeing a lot of complaining because their going to be measuring it at zero lash.

Dirt Full Roller

Total posts: 72
posted November 11, 2005 01:21 PM  
well the problem with measuring a cam at "zero" lash is that unless its a hydraulic you dont run them at zero most solid lifter cams run between .018 and .030 lash , which is the distance from the rocker to the valve when the lifter is on the base of the lobe and if you had a cam with so your actuall lift will be this much less so you have a engine set up with your .540 lift the way you are running it and then they tighten the rockers up till they are at zero and all of a sudden you are over the lift rule . the only way to really check would be to check em after the main as they are raced. its a stupid rule in my opinion

Back to the Archives