Quote: Correct me if I am wrong but aren't pure stock cars supposed to have stock heads meaning no porting at all ? ......if you stay stock and cant go to better parts how do these cars go from the times of mid 12's ten years ago to 11.20's now. The tune sure dont make up that kind of power...... Ron
Engine blueprinting and tire technology. Guarantee you that the heads are stock, as in unported and with the original valve sizes. They can be milled to the minimum (114.8 for a 69 L88) cc's to give maximum compression, and pistons with the maximum overbore allowed. Piston domes are at the maximum and block deck heights are cut to the minimum, all to get the most horsepower while staying within the "rules". Stock camshafts can be installed in an advanced or retarded position, whichever works best for the particular engine. This kind of rebuild isn't the kind you find going on at your average machine shop, but they are being done and can still meet the stock "rules". Did you notice the close-ups of the well worn tires on the orange Vette and the black Mopar over on the picture thread? A simple change of tires from a new set to the well worn set gained over a half of a second in e.t. Also, a set of tires as they were made in 1969 are nearly as hard as wood, and the new reproduction tires made today are even softer and stickier than slicks were back when these cars were new. All that, combined with drivers that have been driving the same car for 10 or even 20 years, gives unbelievable e.t.'s compared to old road tests where the drivers had the car for maybe three or four days, and took it to an untreated track for their testing.
The above can be applied to any make or model of car, with any engine you choose. I would like to think that if you do so, you will be faster than any road test done back in the day.
I agree and understand what you mean. I just dont believe they would go as fast as they are. But as I stated I would do the same as the serious racers have to. Thats the thrill of competition as no one will sit still and watch the competiters go faster and not put their hard earned work to making their cars faster. So I agree that as racers they will keep working to find any performance edge as thats what its all about. I guess the Pure Stock is just like any racing class to the extent that everyone will push the envelope to the most they can to be faster and that part is what us racers do. I just feel some are pushing the envelope a fair amount beyond the point of stock. I do hope the class never goes away no matter what as I really like the stock looking muscle cars that run as hard as we want them too. Ron
