Jun 04, 2014
Tech Results, Decisions & Penalties for Pure Stock Class on the 5/31/2014 event
Ok everyone! Let’s stop the rumors, innuendos & accusations that have no true facts. You all wanted more tech on the class? Well here it is! If you are a top ten car, you will be looked at more often. If you are a top 5 car you will more than likely be looked at the end of every feature. Some nights will be more intense than others such as this past Saturday.
1) First up is the issue of added bars over the rear spring shock towers being considered excessive frame stiffening? It appears that this item has been in a lot of cars for some time now! The verbiage in the rule book is as follows:
Full Front and Rear hoops allowed.
Cars will be inspected individually. Excessive bracing or chassis stiffening is
Subject to a weight penalty, at the discretion of track tech officials. If it is
Determined that a car has an unfair advantage, it will be required to make repairs
or carry a weight penalty (50-100 lbs.), to be determined by tech officials.
It is the decision of the Auto City track officials that the added bars “do not” give a car much of an advantage. The bars do allow a stressed frame car (do to accidents & multiple hits) to stay in the game longer. This allows for a well-used race car to continue on! However in the interest of keeping a level playing field for all, cars that do not have the added bars will be allowed a 50# weight break from their specified weight rule.
2) The second issue was larger intake & exhaust valves in cylinder heads. In regards to cylinder heads, the rule book reads as follows:
Engines may be rebuilt to stock specs; no more than .030 clean up allowed. No more
than .410 lift camshaft allowed.
Max compression 9.5:1No aluminum, Vortec, or Camelback heads allowed. The GM 0-41
head is considered a camelback head and is not allowed.
No porting, polishing or gasket matching allowed.
ABSOLUTELY NO MACHINING OR ALTERING OF ENGINE COMPONENTS PERIOD.
No performance parts. No stroker engines.
No mixing of stock parts allowed (i.e. 305 heads on a 350 engine block).
Valves & Heads must remain stock. For Maintenance purposes you are allowed to Pin,
Thread and Secure Rocker arm studs. Poly-Locks, ok.
No Vortec, Camelback or GM 0-41 heads were found! The rule does not directly address the installation of the larger valves in the allowed heads. A lot of the older engine rebuilds (three years +) have this situation. The larger valve may not be the original valve to that head but must remain an OEM part. No shortening, lengthening of valves or titanium allowed! This is a more cost effective head salvation than a full re-sleeve that requires more machining. All heads inspected will not allow any larger than 2.02 intake & 1.60 exhaust valves. If any of these valves burn, then the head is wasted without considerable expense to salvage. Along as the stock carburetor, intake manifold, exhaust manifold and exhaust pipe rules are proper on the car, the larger valve poses a very small advantage. Cars that do not have the larger valves will be allowed an additional #50 weight break.
3) Carburetors were examined on all top five cars. There were no rule violations found. However Auto City may impose size restriction for the 2015 season.
4) The fourth item looked at was some of the older engines had to go from .030 cylinder wall clean up to .040 in order to save the engine block. The engines in question were under 360ci displacement & had a max compression under 9.5:1. This was allowed and will be addressed in the 2015 rule book.
Last, there was one D.Q issued for 1″ & 2″ offset wheels and two D.Q.s issued for ported & polished exhaust manifolds.
Please excuse us for not getting this info out to you sooner, but a lot of discussion and work went into these decisions. We just want to do the best job we can, and are always striving to make the best decision possible for the benefit of the racers/ racing class as a whole. Thank You, If you have any question please call me, I would rather talk to you then to see this on social media sites.
Auto City Speedway
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