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Subframe connectors any reasons not to have them? #1206170 03/29/12 09:01 PM 03/29/12 09:01 PM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	My 69 road runner cowl started to crack near the windshield so before I fix and repaint the area I am pretty sure it's time for sub frame connectors. I am taking the car down next week to my friends muffler shop to get a custom made exhaust system and my buddy said he can weld me up a set of sub frame connectors at the same time. He said he has done a few of them on E-bodies and he uses 1 x 2 box tubing. He showed me some photos and it's a pretty nice clean look. So this all sounds good but I was just wondering if there are any downsides to having them installed? Thanks for any opinions Stu

Re: Subframe connectors any reasons not to have them? [Re: MidPenMopar] #1206171 03/29/12 09:12 PM 03/29/12 09:12 PM
Joined: Jan 2007 Posts: 2,431 SK,Canada gregsrt top fuel
gregsrt top fuel Joined: Jan 2007 Posts: 2,431 SK,Canada	None that I know of. I had them on my 69 Bee and it was noticeably stiffer. Last edited by gregsrt; 03/30/12 02:23 AM. An association of men who will not quarrel with one another is a thing which has never yet existed, from the greatest confederacy of nations down to a town meeting or a vestry. Thomas Jefferson

Re: Subframe connectors any reasons not to have them? [Re: MidPenMopar] #1206172 03/29/12 09:14 PM 03/29/12 09:14 PM
Joined: Sep 2004 Posts: 22,873 Chicken coop dustergirl340 Chicken Little
dustergirl340 Chicken Little Joined: Sep 2004 Posts: 22,873 Chicken coop	I've had them on my Duster for almost 10 years now. No cons here. Easier to jack the car up, drives better on the road, launches straighter at the track.

Re: Subframe connectors any reasons not to have them? [Re: dustergirl340] #1206173 03/29/12 09:21 PM 03/29/12 09:21 PM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	Quote: I've had them on my Duster for almost 10 years now. No cons here. Easier to jack the car up, drives better on the road, launches straighter at the track. Ok that all sounds pretty positive!

Re: Subframe connectors any reasons not to have them? [Re: MidPenMopar] #1206174 03/29/12 09:33 PM 03/29/12 09:33 PM
Joined: Mar 2003 Posts: 18,678 Fresno, CA Jim_Lusk I Live Here
Jim_Lusk I Live Here Joined: Mar 2003 Posts: 18,678 Fresno, CA	Put 'em on. I would also look around for broken spot welds around the front sub-frames. Tighten the whole thing up.

Re: Subframe connectors any reasons not to have them? [Re: Jim_Lusk] #1206175 03/29/12 09:39 PM 03/29/12 09:39 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Just happen to have a set of competition engineering connectors for B body that I got for my runner and never got to use because I sold the car as a project. PM me if interested.

Re: Subframe connectors any reasons not to have them? [Re: MoparforLife] #1206176 03/29/12 09:57 PM 03/29/12 09:57 PM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	Quote: Just happen to have a set of competition engineering connectors for B body that I got for my runner and never got to use because I sold the car as a project. PM me if interested. Ok I PMed you!

Re: Subframe connectors any reasons not to have them? [Re: MidPenMopar] #1206177 03/29/12 10:03 PM 03/29/12 10:03 PM
Joined: Feb 2003 Posts: 18,582 Rust Belt, SW PA Silver70 I Live Here
Silver70 I Live Here Joined: Feb 2003 Posts: 18,582 Rust Belt, SW PA	Only reason to me is if your building a totally stock original car... this wouldn't fit for your car 68 Road Runner, 69 Belvedere, 71 Challenger Vert 340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z 66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram

Re: Subframe connectors any reasons not to have them? [Re: Silver70] #1206178 03/30/12 12:30 AM 03/30/12 12:30 AM
Joined: Feb 2010 Posts: 18,493 Granite Bay CA Kern Dog Striving for excellence
Kern Dog Striving for excellence Joined: Feb 2010 Posts: 18,493 Granite Bay CA	Look at the subframe connector threads in the Cornering forum here. I doubt that 1x2 tubing would add that much torsional stiffness. The cowl crack is probably due to a hidden defect from the time the car was built or because of a collision long ago. I recall reading your posts, as I remember, you don't stress your car very much. The connectors may be a waste of effort and $$ if you drive conservatively.

Re: Subframe connectors any reasons not to have them? [Re: Kern Dog] #1206179 03/30/12 12:43 AM 03/30/12 12:43 AM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Quote: Look at the subframe connector threads in the Cornering forum here. I doubt that 1x2 tubing would add that much torsional stiffness. The cowl crack is probably due to a hidden defect from the time the car was built or because of a collision long ago. I recall reading your posts, as I remember, you don't stress your car very much. The connectors may be a waste of effort and $$ if you drive conservatively. I pretty much agree with this.. Stu you probably don't drive aggressively enough to justify subframe connectors but if you want to add them I don't see any reason not to... But if your gonna do it 1"x2" material isn't worth the trouble.... most guys use 2"x2" or 2"x3"... "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: Subframe connectors any reasons not to have them? [Re: 1_WILD_RT] #1206180 03/30/12 01:06 AM 03/30/12 01:06 AM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	Quote: I pretty much agree with this.. Stu you probably don't drive aggressively enough to justify subframe connectors but if you want to add them I don't see any reason not to... But if your gonna do it 1"x2" material isn't worth the trouble.... most guys use 2"x2" or 2"x3"... Ok that's what i was looking to find out as to what is the way to go on them. Here's a set that Summit sells for $150. http://www.summitracing.com/parts/CEE-3117/All/

Re: Subframe connectors any reasons not to have them? [Re: MidPenMopar] #1206181 03/30/12 01:34 AM 03/30/12 01:34 AM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	If your gonna do it consider these.. https://store.uscartool.com/66-70-B-Body-Frame-Connectors_p_13.html A picture of them installed.. http://www.uscartool.com/img/70Superbird/index.html "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: Subframe connectors any reasons not to have them? [Re: 1_WILD_RT] #1206182 03/30/12 01:38 AM 03/30/12 01:38 AM
Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi... MidPenMopar OP Looking for fun? Keep looking
MidPenMopar OP Looking for fun? Keep looking Joined: Dec 2003 Posts: 36,840 South San Francisco, Californi...	Quote: If your gonna do it consider these.. https://store.uscartool.com/66-70-B-Body-Frame-Connectors_p_13.html A picture of them installed.. http://www.uscartool.com/img/70Superbird/index.html Ok now i see how they did it. Looks like a very nice job on that Superbird.

Re: Subframe connectors any reasons not to have them? [Re: MidPenMopar] #1206183 03/30/12 02:03 AM 03/30/12 02:03 AM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	I used the 2x3" square tube. Slot open the front part of the rear sub-frame and the square tube slides right in nicely so you can weld it all back together. Only downside to doing it this way is in the back seat feet area the tube comes thru the floor by about 1". It gives a real nice increase in torsional rigidity. Some guys cut the tube to fit the floor's contour, I don't like this because the thinner the tube gets and less rigid it is.

Re: Subframe connectors any reasons not to have them? [Re: DaytonaTurbo] #1206184 03/30/12 09:59 AM 03/30/12 09:59 AM
Joined: Sep 2004 Posts: 22,873 Chicken coop dustergirl340 Chicken Little
dustergirl340 Chicken Little Joined: Sep 2004 Posts: 22,873 Chicken coop	2X2 1/8" square stock tubing on mine.

Re: Subframe connectors any reasons not to have them? [Re: dustergirl340] #1206185 03/30/12 12:10 PM 03/30/12 12:10 PM
Joined: Jan 2003 Posts: 11,078 Berlin, N.J. A abodyjoe I Live Here
abodyjoe I Live Here A Joined: Jan 2003 Posts: 11,078 Berlin, N.J.	this is how i did mine. i could feel that they were there in the first hard corner i took. http://www.bigblockdart.com/techpages/connectors.shtml It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt. www.MoparMisfits.com

Re: Subframe connectors any reasons not to have them? [Re: DaytonaTurbo] #1206186 03/30/12 12:47 PM 03/30/12 12:47 PM
Joined: Aug 2006 Posts: 1,884 Tracy CA R rabid scott "You're Where?"
rabid scott "You're Where?" R Joined: Aug 2006 Posts: 1,884 Tracy CA	Quote: I used the 2x3" square tube. Slot open the front part of the rear sub-frame and the square tube slides right in nicely so you can weld it all back together. Only downside to doing it this way is in the back seat feet area the tube comes thru the floor by about 1". It gives a real nice increase in torsional rigidity. This is the exact way I do it!

Re: Subframe connectors any reasons not to have them? [Re: MidPenMopar] #1206187 03/30/12 03:26 PM 03/30/12 03:26 PM
Joined: Mar 2007 Posts: 3,285 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,285 West Coast, USA	Be sure to add the 4 torque boxes when you add the sub-frame connectors. You may want to consider putting in a lower radiator support while your under there too. I set mine back enough to clear the radiator tank on my '68. It's easier to put in that way, less intrusive and can be removed pretty easily in the future should the need arise. You can see it tieing the bottom of the front frame rails together down in there just in front of the fan belt 7142890-IMG_2563(Large).JPG (437 downloads) Last edited by jbc426; 03/30/12 03:28 PM. 1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)

Re: Subframe connectors any reasons not to have them? [Re: rabid scott] #1206188 03/30/12 03:55 PM 03/30/12 03:55 PM
Joined: May 2005 Posts: 4,730 Florida BDW master
BDW master Joined: May 2005 Posts: 4,730 Florida	Looks good, I've always wondered why no one notches the rear portion so it doesn't stick so far through? Would there still be enough rigidity? Quote:

Re: Subframe connectors any reasons not to have them? [Re: BDW] #1206189 03/30/12 04:06 PM 03/30/12 04:06 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Any connector, even 1x2 is better than none! I'd go the go the non invasive route on Stu's car if it was mine. no need to cut into the floor pan to gain benefits. Last set I made were 2x2 .090 wall IIRC. They make a big difference in ride quality. .125 wall is overkill in almost every situation except stout race cars.

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