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#1 | |
Member
Join Date: Dec 2001
Posts: 131
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Liked 216 Times in 7 Posts
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![]() Quote:
I wish everyone luck next weekend at gainsville. Now that the record is a minimum, someone new will be in teardown as we will not be there. That brings up another point I made, my dad an I are the only cars that have been torn down at a hemi shootout for the last 3 years so this stuff has been under a towel for who knows how long. happy Thanksgiving from the MILITIA cw |
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#2 | ||
Senior Member
Join Date: Nov 2005
Location: NJ
Posts: 503
Likes: 130
Liked 451 Times in 77 Posts
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From NHRA rulebook: Intake side of head may not be cut into ANY PART of valve cover bolt holes. Valve cover bolt holes must remain unaltered and in their original location. Quote:
I can't tell you whose heads are legal or aren't and that really doesn't affect me. That is NHRA's job. What I can tell you is the current generation of heads are cut into the vc bolt hole. I didn't want to stir the pot here. All I want is to be told what is and isn't legal so I can move forward with my 2013 plans. I like to have my stuff ready to race by Jan 1. That will not happen this year. Last edited by SSDA Hemi; 11-22-2012 at 01:22 PM. Reason: Not calling anyone a cheater |
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#3 |
Senior Member
Join Date: Dec 2002
Posts: 916
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Originally Posted by charlie westcott
The heads cant be milled into the V/C bolt at the gasket surface, thats the line that you cant cross. Its been that way since before I started racing in 1991. cw Are they talking about the gasket surface at the valve cover, or the gasket surface on the intake gasket? |
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#4 |
Senior Member
Join Date: Nov 2005
Location: NJ
Posts: 503
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Mark, rule says intake side may not be cut into any part of the vc bolt hole. Not valve cover surface. If this is what they meant this is the way it needs to be written.
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#5 |
Senior Member
Join Date: Nov 2005
Location: NJ
Posts: 503
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Liked 451 Times in 77 Posts
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Part of the problem is the intake face on a Hemi is not at a 90 degree angle to the valve cover surface so the threads of the valve cover bolt breaks through at the bottom of the threads before you are close at the valve cover .
A simple wording of "valve cover bolt hole at the valve cover rail" would in fact keep a majority of the heads legal, BUT- why should some heads be exempt and some be outlawed? All the heads have gone through tech. Legal yesterday but not today. The heads that are milled into the bolt at the rail need a spacer greater than what is milled to be legal and port volumes adjusted to correct cc's. No new Heads can be built this way. Old heads grandfathered in. Like Eric Jones stated " a few thousandths one way or the other isn't going to kill the head" |
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#6 |
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Join Date: Jan 2010
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Are there any plans for the parties involved to sit down with NHRA and have a pow-wow, because this can't go on it will only hurt the class the drivers & owners involved and especially the fans!!!
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#7 |
Member
Join Date: Jun 2004
Location: Cayuga, Canada
Posts: 298
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I really don't know why anybody would argue this with Charlie. He likely knows and has seen more of whats going on than anybody.
Besides, as he said, this rule has been in the book and accepted for ever. A lot older than 1991. It also affects all other engines (Chevys for sure) too. As Charlie said, "where do you stop milling??" at the valve guide?? The cylinder head guys (the majority) have honoured this rule to date, so it is what it is. FJ |
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