NHRA accepted rods ?????

John Beasaw III · 10-01-2009, 08:39 PM

Ok, just a quick question. Im in the planning stages of a new stocker engine (bbc) and noticed the accepted list has both I and H beam rods. I thought chevrolet used only I beams in production. So how how is an H beam a valid replacement? Not complaining just curious.

John Beasaw III
'70 Chevelle

Jeff Lee · 10-01-2009, 10:10 PM

Since NHRA allows aftermarket rods, the configuration of the replacement is of little consequence. As long as the specifications and weight are in line with NHRA tech they could be swiss-cheese. You'll find differing opinions on the H-Beam vs I-Beam but I've always bought I-beam.

John Beasaw III · 10-02-2009, 06:07 AM

Thanks for the response. I hadn't thought of it that way.

John Beasaw III
'70 Chevelle

Adger Smith · 10-02-2009, 06:34 AM

John,
I think what Jeff said does have some merit, but you need to be careful. I seem to remember some posts on this or another forum about a couple of guys being tossed for infractions in the piston/ rod area. If my memory serves me correct one was for claiming rods that weren't marked,etched or inkstamped, with the brand. The other was for pistons that didn't have all or the correct number stamping/etching.. I think you have to have the correct/approved aftermarket rod if you are not running a stock rod, even if the weight is correct. I'm real sure in a stocker the pistons have to be the original stock pistons or the correct part number from the approved list for the engine claimed.
These are just my thoughts on the subject and the way I read the rules. You might want to call or get in touch with your NHRA Division Tech and have a discussion.

Jeff Lee · 10-02-2009, 10:02 AM

Quote:

Originally Posted by Adger Smith

John,
I think what Jeff said does have some merit, but you need to be careful. I seem to remember some posts on this or another forum about a couple of guys being tossed for infractions in the piston/ rod area. If my memory serves me correct one was for claiming rods that weren't marked,etched or inkstamped, with the brand. The other was for pistons that didn't have all or the correct number stamping/etching.. I think you have to have the correct/approved aftermarket rod if you are not running a stock rod, even if the weight is correct. I'm real sure in a stocker the pistons have to be the original stock pistons or the correct part number from the approved list for the engine claimed.
These are just my thoughts on the subject and the way I read the rules. You might want to call or get in touch with your NHRA Division Tech and have a discussion.

Adger is correct. I was going off the original post which asked about "and noticed the accepted list" and I went from there. These details can get lost on long threads and need to be brought back to the front on occasion.

10-01-2009, 08:39 PM	#1
John Beasaw III Member Join Date: Jan 2002 Location: Marion, N.Y. Posts: 126 Likes: 0 Liked 2 Times in 2 Posts	NHRA accepted rods ????? Ok, just a quick question. Im in the planning stages of a new stocker engine (bbc) and noticed the accepted list has both I and H beam rods. I thought chevrolet used only I beams in production. So how how is an H beam a valid replacement? Not complaining just curious. John Beasaw III '70 Chevelle

10-01-2009, 10:10 PM	#2
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: NHRA accepted rods ????? Since NHRA allows aftermarket rods, the configuration of the replacement is of little consequence. As long as the specifications and weight are in line with NHRA tech they could be swiss-cheese. You'll find differing opinions on the H-Beam vs I-Beam but I've always bought I-beam. __________________ Jeff Lee 7494 D/S '70 AMX Last edited by Jeff Lee; 10-01-2009 at 10:14 PM.

10-02-2009, 06:07 AM	#3
John Beasaw III Member Join Date: Jan 2002 Location: Marion, N.Y. Posts: 126 Likes: 0 Liked 2 Times in 2 Posts	Re: NHRA accepted rods ????? Thanks for the response. I hadn't thought of it that way. John Beasaw III '70 Chevelle

10-02-2009, 06:34 AM	#4
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: NHRA accepted rods ????? John, I think what Jeff said does have some merit, but you need to be careful. I seem to remember some posts on this or another forum about a couple of guys being tossed for infractions in the piston/ rod area. If my memory serves me correct one was for claiming rods that weren't marked,etched or inkstamped, with the brand. The other was for pistons that didn't have all or the correct number stamping/etching.. I think you have to have the correct/approved aftermarket rod if you are not running a stock rod, even if the weight is correct. I'm real sure in a stocker the pistons have to be the original stock pistons or the correct part number from the approved list for the engine claimed. These are just my thoughts on the subject and the way I read the rules. You might want to call or get in touch with your NHRA Division Tech and have a discussion. __________________ Adger Smith (Former SS) Last edited by Adger Smith; 10-02-2009 at 06:35 AM. Reason: sp