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PONTIAC'S REVENGE · 08-17-2010, 08:51 PM

Alan,

Didnt know that about the small engines. I did know that Adger had an engine and combo that was completely eliminated. It is why Adger ran IHRA for years, but then receiving the similar fate.

What most people ignor is that it was predominantly an OEM headed class with larger cubic inches. When NHRA allowed the splayed valve heads it allowed small bore engines to be way more competitive. It is now virtually an aluminum small block class. As you increase in cubic inches the linear weight per cubic inch becomes a negative return.

In 2002 I started building a Wenzler headed Pontiac motor with cylinder head development going pretty well. We had 430cfm from a 2.3 valve going next to a 2.4 intake valve with some valve spacing arrangements. Our short block was a 4.35 bore coming out to about 400 inches with a short deck and flat top pistons. However...NHRA decided to add the part number rule to lock us all out once again.

Lynn McCarty

08-17-2010, 08:51 PM	#24
PONTIAC'S REVENGE Member Join Date: Oct 2009 Location: CARMEL, INDIANA Posts: 141 Likes: 69 Liked 48 Times in 18 Posts	Re: 30 years ago at Indy Alan, Didnt know that about the small engines. I did know that Adger had an engine and combo that was completely eliminated. It is why Adger ran IHRA for years, but then receiving the similar fate. What most people ignor is that it was predominantly an OEM headed class with larger cubic inches. When NHRA allowed the splayed valve heads it allowed small bore engines to be way more competitive. It is now virtually an aluminum small block class. As you increase in cubic inches the linear weight per cubic inch becomes a negative return. In 2002 I started building a Wenzler headed Pontiac motor with cylinder head development going pretty well. We had 430cfm from a 2.3 valve going next to a 2.4 intake valve with some valve spacing arrangements. Our short block was a 4.35 bore coming out to about 400 inches with a short deck and flat top pistons. However...NHRA decided to add the part number rule to lock us all out once again. Lynn McCarty