For a factory correct motor, are modifications like porting or milling allowed? What about gasket thicknesses? Also, for judging, could the cam or rockers be changed? Thanks.
My belief is that if Duntov rose from the grave and came to your house, he would prefer a modified (within reason*) Corvette over a restored one any day.
The reason is that Duntov was a racer at heart, and enjoyed driving the heck out of a parted together, unpainted, piece-meal mule as much as the spit and polished SS.
The split many love in the '63 coupe was a very bitter pill for him to swallow, as it didn't improve performance and reduced confidence behind the wheel.
I think he fully expected everyone to take the basic platform he provided, whether a 250 hp base car or the highest horsepower monster out there, and change it to go even faster. I don't think he ever considered a car built in the factory to be truly race ready for a winner. Maybe for an entrant, but not a winner.
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* Not some ugly piece of junk, or something that looked like the results of a drunken dream or bad acid trip.
My belief is that if Duntov rose from the grave and came to your house, he would prefer a modified (within reason*) Corvette over a restored one any day.
The reason is that Duntov was a racer at heart, and enjoyed driving the heck out of a parted together, unpainted, piece-meal mule as much as the spit and polished SS.
The split many love in the '63 coupe was a very bitter pill for him to swallow, as it didn't improve performance and reduced confidence behind the wheel.
I think he fully expected everyone to take the basic platform he provided, whether a 250 hp base car or the highest horsepower monster out there, and change it to go even faster. I don't think he ever considered a car built in the factory to be truly race ready for a winner. Maybe for an entrant, but not a winner.
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* Not some ugly piece of junk, or something that looked like the results of a drunken dream or bad acid trip.
Does this sound like a restorer?
Interesting Mark. I was just kinda kidding though, just trying to ask if modifications are allowed to cars that are showed as "all original" within reason. By the rules, or even someone who likes to bend the rules, possibly break some, and still get by.
In other words, will points be deducted if they "hear" something that doesn't sound stock, though everything looks correct and stock?
And if Duntov really showed up to my house, I promise the last thing I'm gonna be saying to him is, "Hey Zora, does this sound original!?!"
Last edited by LeMans Pete; 06-26-2007 at 10:49 PM.
A lot depends on what the modification does. If it lowers the vacuum and your C3 lights don't work, or the engine idles funny or with a lope, then it would come out in the performance verification. Likewise, the high pressure oil pump will show too high on the gauge and get you dinged.
But polished rods or the engine decked .010 (unless you cut off the stamp pad of course) or bored .030 over will probably never make any difference that anyone can see or hear.
For a factory correct motor, are modifications like porting or milling allowed? What about gasket thicknesses? Also, for judging, could the cam or rockers be changed? Thanks.
Porting and milling will not be judged since they are usually not visible to the eye.
A good judge might notice a thicker gasket or double gaskets. A deduction wouldn't be much.
A good judge will almost certainly hear a cam change if you move more to the extreme side.
When I had the '70 (L46) engine rebuilt, I had the heads pocket ported, a 3-angle valve job, engine bored 30 over, intake mainfold/heads port matched, hardened valve seats, and lowered the CR from 11:1 to 10:1. None of this was detectable to NCRS and no points were taken for these actions.
Engine judging is based on 1) What the components look like, and 2) How it sounds and behaves when it's running during the Operations check. If it doesn't deviate from what's typical for that configuration, you'll get full credit. Nobody has a clue what's really inside it, but if they hear solid lifters on a 300hp engine, expect a deduction.
Corvette Store
are modifications allowed??
