which motor for class?

Alan Roehrich · 12-01-2009, 07:21 AM

Before you go any further, you need a copy of the rules. I suggest you find someone who has an extra copy of a recent rule book, like the 2009 rulebook, that they'll loan you or give to you.

You cannot run roller rocker arms in Stock in NHRA. You should not try to run a 7.5" 10 bolt, you can run an 8.5" 10 bolt, an 8.625" 10 bolt, or an 8.875" 12 bolt, but that 7.5" 10 bolt will likely break, and then you'll have to build a good rearend anyway.

To find out what class your car fits, and what engines you can run, you look in the Stock Car Classification Guide. To find the specifications on the engine, you look in the Engine Blueprint Specifications. To find these lists, go to the NHRA website, and click the "Competition" tab. You'll also find the accepted connecting rod list and the accepted piston list.

Good luck.

X-TECH MAN · 12-01-2009, 08:16 AM

Quote:

Originally Posted by Alan Roehrich

Before you go any further, you need a copy of the rules. I suggest you find someone who has an extra copy of a recent rule book, like the 2009 rulebook, that they'll loan you or give to you.

You cannot run roller rocker arms in Stock in NHRA. You should not try to run a 7.5" 10 bolt, you can run an 8.5" 10 bolt, an 8.625" 10 bolt, or an 8.875" 12 bolt, but that 7.5" 10 bolt will likely break, and then you'll have to build a good rearend anyway.

To find out what class your car fits, and what engines you can run, you look in the Stock Car Classification Guide. To find the specifications on the engine, you look in the Engine Blueprint Specifications. To find these lists, go to the NHRA website, and click the "Competition" tab. You'll also find the accepted connecting rod list and the accepted piston list.

Good luck.

The roller rockers are legal in IHRA ONLY and they have to be the correct rocker ratio. 1.5 in your case.

Dwight Southerland · 12-01-2009, 08:50 AM

Look here:
http://www.nhra.net/tech_specs/engin...ts/CHEV-79.rtf

Dished pistons. Cam .373" lift intake, .410" lift exhaust.

Don't overlook the 2-bbl engine. At 180 rating, it's a viable option.

budgetracer · 12-01-2009, 06:39 PM

They won't let me in that site. It comes up then says enter my 25 digit code off my CD. Product info something/any help?

Jeremy K · 12-01-2009, 06:59 PM

Sounds like you need to find your Microsoft Office CD and enter the product key that's on the package. The stock car classification guide uses Microsoft Excel and the engine blueprint guide uses Microsoft Word and without this product key, they will not work.

Mark Yacavone · 12-01-2009, 09:00 PM

Quote:

Originally Posted by budgetracer

They won't let me in that site. It comes up then says enter my 25 digit code off my CD. Product info something/any help?

Pretty sure you can download a free Excel viewer right from the link on the NHRA spec front page

budgetracer · 12-03-2009, 02:46 AM

I tried the excel viewer too no go

12-01-2009, 07:21 AM	#1
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,105 Likes: 1,564 Liked 1,789 Times in 408 Posts	Re: which motor for class? Before you go any further, you need a copy of the rules. I suggest you find someone who has an extra copy of a recent rule book, like the 2009 rulebook, that they'll loan you or give to you. You cannot run roller rocker arms in Stock in NHRA. You should not try to run a 7.5" 10 bolt, you can run an 8.5" 10 bolt, an 8.625" 10 bolt, or an 8.875" 12 bolt, but that 7.5" 10 bolt will likely break, and then you'll have to build a good rearend anyway. To find out what class your car fits, and what engines you can run, you look in the Stock Car Classification Guide. To find the specifications on the engine, you look in the Engine Blueprint Specifications. To find these lists, go to the NHRA website, and click the "Competition" tab. You'll also find the accepted connecting rod list and the accepted piston list. Good luck. __________________ Alan Roehrich 212A G/S

12-01-2009, 08:50 AM	#3
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,999 Likes: 64 Liked 772 Times in 192 Posts	Re: which motor for class? Look here: http://www.nhra.net/tech_specs/engin...ts/CHEV-79.rtf Dished pistons. Cam .373" lift intake, .410" lift exhaust. Don't overlook the 2-bbl engine. At 180 rating, it's a viable option.

12-01-2009, 06:39 PM	#4
budgetracer Junior Member Join Date: Jul 2008 Posts: 30 Likes: 0 Liked 0 Times in 0 Posts	Re: which motor for class? They won't let me in that site. It comes up then says enter my 25 digit code off my CD. Product info something/any help?

12-01-2009, 06:59 PM	#5
Jeremy K Junior Member Join Date: Nov 2009 Location: Bridgewater, NS, Canada Posts: 79 Likes: 0 Liked 1 Time in 1 Post	Re: which motor for class? Sounds like you need to find your Microsoft Office CD and enter the product key that's on the package. The stock car classification guide uses Microsoft Excel and the engine blueprint guide uses Microsoft Word and without this product key, they will not work.

12-03-2009, 02:46 AM	#7
budgetracer Junior Member Join Date: Jul 2008 Posts: 30 Likes: 0 Liked 0 Times in 0 Posts	Re: which motor for class? I tried the excel viewer too no go