Interesting point, Don. And I agree! But when was the last time you saw the "spirit and intent" rule invoked? In nearly 50 years of being in karting, I can't say that I ever have (at least at the races where I have been personally.)
I totally agree with the rule and the concept, but as you mentioned, "Nobody likes to invoke the spirit and intent rule." That's because it is interpretive and no tech man wants to make a call based on appearance alone. Kind of like the "compare to known stock part" rule. It introduces interpretation via possible bias rather than black and white measurements. I get it, there is no rule book that can cover everything, but I think we can do better to eliminate the interpretation/appearance rulings (in all engine rules.)
There is no doubt that the Predator engines are being "cheated up" big time.
An engine builder getting $650 for a Predator is probably not just pulling it out of the box and bolting it on his dyno. I suspect there's considerably more being done (cylinder clearance, detensioning rings, twisting the cam or cam timing gear, valves and seat work, cylinder head and deck machining, carb work, etc etc.) That all comes at a cost, and from most rule sets, is all legal (disregarding the "spirit and intent.") Now, I say it's legal BECAUSE no one is invoking the spirit and intent rule and there is nothing "measurable" being detected in tech - therefor not illegal.
It's difficult enough to get good tech men WITH solid (measurable) rules to enforce -- tell them that they need to make judgment calls based on "appearance or intent," and I suspect that we'll lose even more. In my opinion, the whole Predator deal is doomed to repeat the same history as the clone as more rules are introduced.
Not to introduce another dog to the fight, but if you look at the L206 engine, the rules were written by the manufacturer, are fairly restrictive, and manufacturing variances can be much closer monitored and corrected. That and the fact that it is a purposely built and sealed race engine are big reasons that this package is successful, even at a $600 MSRP. Jimmy Sims group offers a similar sealed clone. I wonder why they have not caught on better with the low budget racers? Maybe it's the perception that you can still purchase HF Predators for $100, bolt them on and race them (competitively or not.) Maybe it's more that you cannot cheat them up as easily to gain an advantage. It seems that's the objective by some in racing, is to gain an advantage wherever they can. Whatever the reason, it doesn't matter what engine platform it is, builders will continually get requests to work the gray areas of the rules and beyond on their engines, and "spirit and intent" will always be difficult to enforce.
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Brian Carlson
Carlson Racing Engines
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