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06-15-2012, 06:28 AM | #11 |
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Re: Stocker Cylinder Heads....
To provide the level of clarification desired on every subject in every class, would require a 10,000 page rule book that would be more confusing than the US tax code.
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Chad Sheets | STK 319 | 10.69 | 1.39 |
06-15-2012, 08:25 AM | #12 |
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Re: Stocker Cylinder Heads....
Shoot peening is also very good to hide porting just make sure you use the correct media.
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06-15-2012, 09:22 AM | #13 |
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Re: Stocker Cylinder Heads....
In the 1970s Racing Head Service and others collected dozens of heads and selected the best ones for Stock. There aren't many of these heads left today and it is "amazing" how well they flow, all of them, not just the 5-10% that RHS found. The 11th Commandment: "Thou shalt not get caught." lol.
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06-15-2012, 10:23 AM | #14 | |
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Re: Stocker Cylinder Heads....
Quote:
polishing, welding, epoxying and acid-porting prohibited. Combustion-chamber modifications prohibited. The rule is simple you can not do any of that legally. So If you want to be legal as you say you can not get heads that have any of those things done. In My opionion (that is worth pretty much nothing) The problem is they don't let the tech people do their job. And the cheaters need to accept the fact that they got got cheating and not run and get their lawyer. Face it any one that pays $5000 for smallblock Chevy stocker heads knows dam well that the heads are not legal acording to the rule book. Nobody cares what is actually legal all they care is will the lack of proper tech let them run them anyway. |
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06-15-2012, 02:23 PM | #15 | ||
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Re: Stocker Cylinder Heads....
Quote:
http://abs-products.com/blast-cabine...-bastard.shtml Quote:
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Dean Feiock -- Stock 5002 |
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06-15-2012, 02:47 PM | #16 |
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Re: Stocker Cylinder Heads....
BINGO! You win the prize!
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06-15-2012, 03:30 PM | #17 | |
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Re: Stocker Cylinder Heads....
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What will and what won't pass tech may be reality. But the fact remains if you or if you have someone do any of the above things to a cylinder head it is not a legal cylinder head. It may very well pass tech but it is still not a legal head. Until they change the wording of the rule doing any porting and covering it up is still not legal Now on those same lines a good digitizer could easily take the guess work out of the situation. All you need is a real untouched head to get the numbers off. All the old cars people used the core shift as to why that would not work. But with these new factory race cars with the cnc ported heads from the factory. You should be able to know without a doubt if someone has changed the cylinder head. But none of that matters because Neither HRA is ever going to take following the rules they set seriously. Hence how they got to the mess they have now. Last edited by novassdude; 06-15-2012 at 03:34 PM. Reason: fixed |
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06-15-2012, 03:45 PM | #18 |
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Re: Stocker Cylinder Heads....
When Vinny Gumbotz did my head many moons ago he guaranteed they'de pass tech anywhere,anytime.
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Former NHRA #1945 Former IHRA #1945 T/SA |
06-15-2012, 04:38 PM | #19 | |
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Re: Stocker Cylinder Heads....
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So which head would you use as a model? I am told at a recent race, they pulled down three 305 motors. And I am told that all three heads looked different. So how do you decide which head was wrong? I don't want to speak for Wade, but I think his concern is simple. We have been given runner volumes. If we meet those volumes, all other measured items pass, and there are no grinding marks in our runners, shouldn't the head pass tech? At least that is the assumption many were under. You say buy a digitizer. I say NHRA would need 8-9 of them minimum. And then they would need to train on how to use them. And then "which" head do you use as model? I don't envy NHRA tech. We are a big pain in the a**. They work hard when we are having fun. We bitch when they do their job and we bitch when they don't.
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Dean Feiock -- Stock 5002 Last edited by Dean Feiock; 06-15-2012 at 04:40 PM. |
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06-15-2012, 08:05 PM | #20 | |
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Re: Stocker Cylinder Heads....
Quote:
The problem in using a digitizer is that you will need to do statistical analysis to get a measurement that would cover the variation in the casting. Besides, NHRA will not invest in such equipment either. Just think the variations they already have on the burrettes due to the differences of material and manufacturer. |
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