Mid plate vs. no midplate

Gary Smith · 07-15-2015, 12:34 PM

I was told a midplate is just as important as a front engine plate on a "high" horsepower engine (above 800) due to movement in a car on a chassis dyno that didn't have one. I say it's a wives tale being they're not allowed in SS yet there are plenty of 900+ hp engines in SS/B - SS/AH with no problems.

Opinions?

Jeff Jewell · 07-15-2015, 02:00 PM

Quote:

Originally Posted by Gary Smith

I say it's a wives tale being they're not allowed in SS yet

Actually, they are allowed in SS. Just put one in mine. Section 11A, page 7 of the current rulebook.

Dave Noll · 07-15-2015, 03:33 PM

Well, I'm a FFFFord guy an as such, Bob Glidden wouldn't use an engine stand. And thats on engine's not running.

Rich67stang · 07-15-2015, 03:46 PM

I run a Front plate and solid steel motor mounts in my SS/AS Mustang and it makes over 900HP, I have not seen any problems as of late.

SSDiv6 · 07-15-2015, 04:56 PM

The use of a midplate is a plus and if the rules allows it, use it.

It stiffens the chassis and also limits the torsional twist and stresses on both the engine block and transmission.

In many cars, it improves the 60' numbers,

If you have to use a diaper, it makes the installation and removal easier.
It makes engine removal easier too.

Gary Smith · 07-15-2015, 05:11 PM

Quote:

Originally Posted by Jeff Jewell

Actually, they are allowed in SS. Just put one in mine. Section 11A, page 7 of the current rulebook.

Thanks. I'm falling behind with rules.

Dragsinger · 07-15-2015, 06:00 PM

SSDivn6 mirrors my feelings.

I think it is a good addition and see no down side to doing so.

colby · 07-15-2015, 06:27 PM

On a similar topic....

"All motor plates, mid-plates, etc. must be separate from and may not be attached to the firewall."

Can the mid-plate be bolted to tabs on the front of the chassis and firewall be welded to the outside?

SSDiv6 · 07-15-2015, 08:14 PM

Quote:

Originally Posted by colby

On a similar topic....

"All motor plates, mid-plates, etc. must be separate from and may not be attached to the firewall."

Can the mid-plate be bolted to tabs on the front of the chassis and firewall be welded to the outside?

The mid-plate can only be part or integral to the firewall in Comp Super Modified class.

For Super Stock class, the firewall and mid-plate must be separate pieces.

colby · 07-15-2015, 08:26 PM

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

07-15-2015, 12:34 PM	#1
Gary Smith Senior Member Join Date: Jul 2007 Location: Greensboro, NC Posts: 820 Likes: 9 Liked 132 Times in 30 Posts	Mid plate vs. no midplate I was told a midplate is just as important as a front engine plate on a "high" horsepower engine (above 800) due to movement in a car on a chassis dyno that didn't have one. I say it's a wives tale being they're not allowed in SS yet there are plenty of 900+ hp engines in SS/B - SS/AH with no problems. Opinions? __________________ Gary Smith "another broke racer spectating"

07-15-2015, 03:33 PM	#3
Dave Noll Senior Member Join Date: Nov 2007 Location: Div. 6, Eastern, WA Posts: 709 Likes: 2,663 Liked 238 Times in 111 Posts	Re: Mid plate vs. no midplate Well, I'm a FFFFord guy an as such, Bob Glidden wouldn't use an engine stand. And thats on engine's not running. __________________ Dave Noll, EF/S ,?/SA 6526

07-15-2015, 03:46 PM	#4
Rich67stang Member Join Date: Nov 2005 Location: Jackson, NJ Posts: 312 Likes: 3 Liked 111 Times in 26 Posts	Re: Mid plate vs. no midplate I run a Front plate and solid steel motor mounts in my SS/AS Mustang and it makes over 900HP, I have not seen any problems as of late. __________________ Richard Preiser 1613 FGT/I 1510 C/SA 161 F/DA

07-15-2015, 04:56 PM	#5
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,043 Likes: 712 Liked 1,576 Times in 581 Posts	Re: Mid plate vs. no midplate The use of a midplate is a plus and if the rules allows it, use it. It stiffens the chassis and also limits the torsional twist and stresses on both the engine block and transmission. In many cars, it improves the 60' numbers, If you have to use a diaper, it makes the installation and removal easier. It makes engine removal easier too.

07-15-2015, 06:00 PM	#7
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	Re: Mid plate vs. no midplate SSDivn6 mirrors my feelings. I think it is a good addition and see no down side to doing so. __________________ Larry Woodfin 471W

07-15-2015, 06:27 PM	#8
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 On a similar topic.... "All motor plates, mid-plates, etc. must be separate from and may not be attached to the firewall." Can the mid-plate be bolted to tabs on the front of the chassis and firewall be welded to the outside?

07-15-2015, 08:26 PM	#10
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 Does anyone have pictures of a legal firewall in FWD converted modified they wouldn't mind sharing?