Mid plate vs. no midplate - Page 2

colby · 07-15-2015, 08:59 PM

http://www.brinkracecraft.com/Galler...e/P3189305.jpg

JHeath · 07-15-2015, 09:47 PM

S/S Cavalier from Racing Junk ad several years ago.

JHeath · 07-15-2015, 10:04 PM

Another one @ P&K Race Cars.

SSDiv6 · 07-15-2015, 10:13 PM

Quote:

Originally Posted by colby

Does anyone have pictures of a legal firewall in FWD converted modified they wouldn't mind sharing?

Here you go.

colby · 07-17-2015, 09:17 AM

Would this work?

colby · 07-19-2015, 01:23 PM

Anyone?

Mark Markow · 07-20-2015, 11:22 AM

Quote:

Originally Posted by colby

Would this work?

in my opinion I would e-mail the drawings to the tech department at nhra, or your div. tech director. to get an approval, and save or print the e mails. so if down the road there is a problem, you have some correspondence to show.

SSDiv6 · 07-20-2015, 11:55 AM

Quote:

Originally Posted by colby

Anyone?

The design looks great as regards to stiffness from an engineering standpoint.
Nevertheless, the installation looks quite forward from the firewall.
You don't want to compromise the advantages of engine setback.

Also remember that the rule book specifies that for the Chevy Cobalt, the distance from the radiator core support to the firewall for Super Stock GT and Super Stock Modified is a maximum of 33 inches. For Comp Eliminator Super Modified is a maximum of 34 inches.

colby · 07-29-2015, 09:55 AM

Just got word back from NHRA that the design would be acceptable. The spacing the model shown was exaggerated slightly to help show that there was a separation of the firewall and midplate. In reality the front surface of the midplate will only be 1" from the firewall. With the LS style engine they actually have no bellhousing flange like a traditional SBC, so the mass of the engine is already offset to the rear over an inch. The engine really has to be offset from the firewall or the head will basically be touching it.

Gary Smith · 07-29-2015, 01:19 PM

Quote:

Originally Posted by JHeath

Another one @ P&K Race Cars.

Wasn't aware you can fab a complete firewall on a FWD GT car. Thought part of the OEM piece needed to be intact.

07-15-2015, 08:59 PM	#11
colby Junior Member Join Date: Oct 2014 Location: Noble, OK Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	Re: Mid plate vs. no midplate http://www.brinkracecraft.com/Galler...e/P3189305.jpg

07-15-2015, 09:47 PM	#12
JHeath Senior Member Join Date: Jul 2004 Location: Minneapolis Posts: 786 Likes: 2,876 Liked 370 Times in 101 Posts	Re: Mid plate vs. no midplate S/S Cavalier from Racing Junk ad several years ago. Attached Thumbnails __________________ Jerry Heath I/S '93 Cobra FS/J 2010 Mustang "Ebay CJ" Last edited by JHeath; 07-15-2015 at 10:06 PM.

07-15-2015, 10:04 PM	#13
JHeath Senior Member Join Date: Jul 2004 Location: Minneapolis Posts: 786 Likes: 2,876 Liked 370 Times in 101 Posts	Re: Mid plate vs. no midplate Another one @ P&K Race Cars. Attached Thumbnails __________________ Jerry Heath I/S '93 Cobra FS/J 2010 Mustang "Ebay CJ"

07-17-2015, 09:17 AM	#15
colby Junior Member Join Date: Oct 2014 Location: Noble, OK Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	Re: Mid plate vs. no midplate Would this work?

07-19-2015, 01:23 PM	#16
colby Junior Member Join Date: Oct 2014 Location: Noble, OK Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	Re: Mid plate vs. no midplate Anyone?

07-29-2015, 09:55 AM	#19
colby Junior Member Join Date: Oct 2014 Location: Noble, OK Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	Re: Mid plate vs. no midplate Just got word back from NHRA that the design would be acceptable. The spacing the model shown was exaggerated slightly to help show that there was a separation of the firewall and midplate. In reality the front surface of the midplate will only be 1" from the firewall. With the LS style engine they actually have no bellhousing flange like a traditional SBC, so the mass of the engine is already offset to the rear over an inch. The engine really has to be offset from the firewall or the head will basically be touching it.