cross breading of engines in Stock and/or Super Stock

Todd Gross · 08-25-2017, 01:04 PM

I would think so. I have a friend that runs a 64 chevelle with a COPO style LS7 in Super Stock. I am not sure what the designation is.
You could email pat at NHRA and ask him about the combo you wish to run. pcvengros@nhra.com

BRETV · 08-25-2017, 01:53 PM

You could run it in Super Stock under the new FGT/? class. You use an older car in the stock guide, like your 66 Mustang with a new/ 2008 or newer engine, like in your case 5.0 Coyote motor that is legal in a new cobra jet. Hope that helps.

Bret Velde
2003 SS/LA

jmcarter · 08-25-2017, 02:44 PM

Easy peasy...use Dwight Sutherland's great tool...link here. Select the year/make/model of car and then select one of the weight/power values and it will then let pick "GT Class" and select the engine...you then have the potential classes to pick from.

http://www.classracerinfo.com

SwillRacer · 08-25-2017, 03:07 PM

Thanks for the help guys!!

One last question: I was looking at the Stock class rules years ago (I was always a foxbody guy) and I saw the success that Evan Smith had with his MM&FF Project Stocker. I recall that rotating assemblies had to come from an approved list as well as ported stock cyl head castings were illegal.

Would this apply in the GT classes?

My cyl heads are heavily ported, oversized valves, custom cams, aftermarket pistons and rods,etc.....

Thanks again!

BRETV · 08-25-2017, 03:44 PM

Quote:

Originally Posted by SwillRacer

Thanks for the help guys!!

One last question: I was looking at the Stock class rules years ago (I was always a foxbody guy) and I saw the success that Evan Smith had with his MM&FF Project Stocker. I recall that rotating assemblies had to come from an approved list as well as ported stock cyl head castings were illegal.

Would this apply in the GT classes?

My cyl heads are heavily ported, oversized valves, custom cams, aftermarket pistons and rods,etc.....

Thanks again!

Nope, the GT classes are Superstock classes, so porting, polishing, any cam and valvetrain, etc. Still gonna need the rule book for the specifics. I'm a foxbody guy too!

Bret Velde
2003 SS/LA

Hacksaw · 08-25-2017, 04:42 PM

Don't think there is any chance your combo will fit into a GT class. You need to meet stock port volumes, stock type configuration pistons and standard valve sizes just to begin with. Maybe a SS modified class, SS/AM or SS/AS ?

Jim Caughlin · 08-25-2017, 05:09 PM

The other issue would be the chassis, I am thinking that you had to do some pretty extensive mods to make a Coyote engine fit in a '66 Mustang chassis. The towers and suspension components have to be dimensionally stock. That would be a no go also.

08-25-2017, 01:04 PM	#1
Todd Gross Member Join Date: Mar 2016 Location: Crete, IL Posts: 167 Likes: 260 Liked 54 Times in 24 Posts	Re: cross breading of engines in Stock and/or Super Stock I would think so. I have a friend that runs a 64 chevelle with a COPO style LS7 in Super Stock. I am not sure what the designation is. You could email pat at NHRA and ask him about the combo you wish to run. pcvengros@nhra.com __________________ Todd Gross 3323 FS/E,F

08-25-2017, 01:53 PM	#2
BRETV Senior Member Join Date: Oct 2003 Posts: 566 Likes: 4,129 Liked 776 Times in 199 Posts	Re: cross breading of engines in Stock and/or Super Stock You could run it in Super Stock under the new FGT/? class. You use an older car in the stock guide, like your 66 Mustang with a new/ 2008 or newer engine, like in your case 5.0 Coyote motor that is legal in a new cobra jet. Hope that helps. Bret Velde 2003 SS/LA

08-25-2017, 02:44 PM	#3
jmcarter VIP Member Join Date: Dec 2008 Location: Richmond Hill GA (and Port Ludlow WA) Posts: 4,293 Likes: 2,364 Liked 3,165 Times in 969 Posts	Re: cross breading of engines in Stock and/or Super Stock Easy peasy...use Dwight Sutherland's great tool...link here. Select the year/make/model of car and then select one of the weight/power values and it will then let pick "GT Class" and select the engine...you then have the potential classes to pick from. http://www.classracerinfo.com __________________ Jim Carter 2340 Super Stock 2340 SST/2340 Stock Set another place at the table

08-25-2017, 03:07 PM	#4
SwillRacer Junior Member Join Date: Apr 2009 Posts: 42 Likes: 0 Liked 5 Times in 1 Post	Re: cross breading of engines in Stock and/or Super Stock Thanks for the help guys!! One last question: I was looking at the Stock class rules years ago (I was always a foxbody guy) and I saw the success that Evan Smith had with his MM&FF Project Stocker. I recall that rotating assemblies had to come from an approved list as well as ported stock cyl head castings were illegal. Would this apply in the GT classes? My cyl heads are heavily ported, oversized valves, custom cams, aftermarket pistons and rods,etc..... Thanks again!

08-25-2017, 04:42 PM	#6
Hacksaw Senior Member Join Date: Sep 2016 Posts: 881 Likes: 206 Liked 308 Times in 173 Posts	Re: cross breading of engines in Stock and/or Super Stock Don't think there is any chance your combo will fit into a GT class. You need to meet stock port volumes, stock type configuration pistons and standard valve sizes just to begin with. Maybe a SS modified class, SS/AM or SS/AS ?

08-25-2017, 05:09 PM	#7
Jim Caughlin Senior Member Join Date: Mar 2002 Location: Woodburn, Or Posts: 683 Likes: 80 Liked 800 Times in 244 Posts	Re: cross breading of engines in Stock and/or Super Stock The other issue would be the chassis, I am thinking that you had to do some pretty extensive mods to make a Coyote engine fit in a '66 Mustang chassis. The towers and suspension components have to be dimensionally stock. That would be a no go also.