Anyone install LMR Sub Frame Connectors? - Ford Mustang Forums : Corral.net Mustang Forum
 
LinkBack Thread Tools Display Modes
post #1 of 15 Old 05-01-2016, 08:12 PM Thread Starter
Registered User
 
dencon's Avatar
 
Trader Feedback: (0)
Join Date: May 2015
Location: Phoenix, Az.
Posts: 56
Anyone install LMR Sub Frame Connectors?

I am getting ready to install Late Model Restoration's Sub Frame Connectors and I am running into something that has got me a little concerned.

To start, I have the car supported up with it's weight on the wheels as if it was on the ground.


When I got the connectors up to the bottom of the car. I could get them up to the front sub frame but it bowed downward making it to be a few inches from the rear sub frame.


So with the rear jack, I had to force the rear of the connector up to kind of get it to the rear subframe but could not get it to touch.

Now there is allot of sprung tension in the connector, so first. There are gaps within the front and rear subframes and the connectors that makes for welding them up allot of fill work;



...and Second, would that tension from the sub frame be pulling and putting downward forces on the uni-body chassis of the car at the front and the rear and making it no longer a square frame?
Thanks for any advice and input.


1988 GT
2006 V6 S197
dencon is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 05-01-2016, 11:21 PM Thread Starter
Registered User
 
dencon's Avatar
 
Trader Feedback: (0)
Join Date: May 2015
Location: Phoenix, Az.
Posts: 56
Here is a You Tube vid I just made on this. Is shows you better on what's going on then what the pics do.
https://www.youtube.com/watch?v=MbUW71iOAmI


1988 GT
2006 V6 S197
dencon is offline  
post #3 of 15 Old 05-02-2016, 12:57 AM
Registered User
 
Trader Feedback: (3)
Join Date: Nov 2007
Location: sacramento
Posts: 607
I would send them back. You may be able to bend them like you stated in your video but it may take you a while to get them to fit perfectly. Not worth the time IMOP. If you were to use your jacks to force them into position they would essentially be trying to bend the car in half or trying to bring the wheels closer together if that makes more sense to you.

I remember having a long conversation with MM about how to properly install my FLSC and they stressed having the car sitting with its weight on the wheels and what would happen if someone were to place jack stands under the rear end and K member.
darkside03gt is offline  
Sponsored Links
Advertisement
 
post #4 of 15 Old 05-02-2016, 02:05 AM Thread Starter
Registered User
 
dencon's Avatar
 
Trader Feedback: (0)
Join Date: May 2015
Location: Phoenix, Az.
Posts: 56
Thanks for the input. Problem is I bought them a year ago and I have painted on them on the top. I also welded caps on the ends because they were open.
I figured the same thing you said about what the would do to the car. That is why I stopped and see if anyone else has had this happen.
I might cut my losses with these and order a set from MM.
I will continue to do business with LMR. I think they are a really good company. So I do not want to bag on them at all. I just might think twice about any of their SVE products now. May have to take the SVE sticker off my car.

1988 GT
2006 V6 S197
dencon is offline  
post #5 of 15 Old 05-02-2016, 11:36 AM
Registered User
 
EscortSportage's Avatar
 
Trader Feedback: (5)
Join Date: Dec 2009
Location: NYC
Posts: 1,922
Garage
Return them now!

Just order MM's full length ones, you wont be disappointed, and plus you dont want to go cheap on chassis/suspension/brakes with these old foxes.

instagram.com/escortsportage
Sponsors: MaximumMotorsports,liwrap,Stinger-Performance,Cosmis Racing Wheels
2480LBS
306W
EscortSportage is offline  
post #6 of 15 Old 05-02-2016, 12:09 PM
Registered User
 
FOXBODY5.8's Avatar
 
Trader Feedback: (7)
Join Date: May 2011
Location: Fabius, NY
Posts: 647
I need to get a set of these for my car too..

Michael, yes another one of the 4,200,415.
1989 LX 357w Hatch
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Lightning Block, Bullet Cam, Pro-Comp 210's (<Powered the mother ship in unison with the b-cam), GT-40 Tube, Pro-M 80mm, Lightning T/B, T5Z, 3.73's.
FOXBODY5.8 is offline  
post #7 of 15 Old 05-02-2016, 04:41 PM
Registered User
 
bird_dog0347's Avatar
 
Trader Feedback: (4)
Join Date: Jun 2012
Location: Little Elm, TX
Posts: 265
I have the MM ones and tried to do the same thing but the chassis already has a lot of flex after years and years... Mine have the same issue even with the MM ones, not yet installed. The MM instructions say that if you have this issue you'll need a press to increase/decrease the bend/angle to make them fit right. Check the MM install instructions for details, I don't have a press or I would already have done it. Steps 17 & 18 in the guide linked below.

http://www.maximummotorsports.com/as...iff/MMFL-5.pdf

1992 5.0 5sp coupe, ported GT-40 intake, TFS 170 heads, Scorpion 1.72 RR, TFS1 Cam, BBK longtubes, BBK H-pipe, MSPNP2 ECU, Full Koni MM coilovers, SVE S1 seats, Moda R6 Wheels, full Cobra Brakes, 2004 Cobra IRS, MM SFC's,
bird_dog0347 is offline  
post #8 of 15 Old 05-02-2016, 11:47 PM Thread Starter
Registered User
 
dencon's Avatar
 
Trader Feedback: (0)
Join Date: May 2015
Location: Phoenix, Az.
Posts: 56
Quote:
Originally Posted by bird_dog0347 View Post
I have the MM ones and tried to do the same thing but the chassis already has a lot of flex after years and years... Mine have the same issue even with the MM ones, not yet installed. The MM instructions say that if you have this issue you'll need a press to increase/decrease the bend/angle to make them fit right. Check the MM install instructions for details, I don't have a press or I would already have done it. Steps 17 & 18 in the guide linked below.

http://www.maximummotorsports.com/as...iff/MMFL-5.pdf
Were yours off as much as mine? Thanks for the link.

1988 GT
2006 V6 S197
dencon is offline  
post #9 of 15 Old 05-03-2016, 11:33 AM
Registered User
 
bird_dog0347's Avatar
 
Trader Feedback: (4)
Join Date: Jun 2012
Location: Little Elm, TX
Posts: 265
Quote:
Originally Posted by dencon View Post
Were yours off as much as mine? Thanks for the link.
I haven't had a chance to see your video yet, but I'd guess that yes they are. It's not the SFC that's the problem, it's the 25+ year old crappy chassis that was never properly braced. I still need to install mine but need a press to do so, I might just pay to have them installed by a shop that will do it properly, but then again I don't usually trust anyone to do it better than me.

1992 5.0 5sp coupe, ported GT-40 intake, TFS 170 heads, Scorpion 1.72 RR, TFS1 Cam, BBK longtubes, BBK H-pipe, MSPNP2 ECU, Full Koni MM coilovers, SVE S1 seats, Moda R6 Wheels, full Cobra Brakes, 2004 Cobra IRS, MM SFC's,
bird_dog0347 is offline  
post #10 of 15 Old 05-03-2016, 10:10 PM
Registered User
 
Trader Feedback: (3)
Join Date: Dec 2010
Location: maryland
Posts: 303
I had ordered a set of frame connectors from a company, I think it was LMR, because the price was a fair amount cheaper than MM and the connectors looked similar in the pics. The car club I am in had a big frame connector install day at a shop and they had all purchased MM connectors in a group buy. I could lay my connectors on the ground next to the MM ones and if I stood on them the ones I had would flex, the MM connectors did not. Lucky for me they had one extra set of MM connectors. I bought those, had them installed and sold the LMR connectors.

I would order a set of MM connectors and consider it a lesson learned. LMR has good stuff but the MM connectors were much better. I don't recall having any fitment issues.


'03 Cobra-529rwhp, '95R #201, '90 GT w/ IRS, 2015 Focus ST, 2012 GT track car
wheelhopper is offline  
post #11 of 15 Old 05-04-2016, 09:29 AM Thread Starter
Registered User
 
dencon's Avatar
 
Trader Feedback: (0)
Join Date: May 2015
Location: Phoenix, Az.
Posts: 56
Thanks for that piece of info. Why would they flex? Were the LMR SFCs using lighter gauge tubing?

1988 GT
2006 V6 S197
dencon is offline  
post #12 of 15 Old 05-04-2016, 03:13 PM
Registered User
 
qtrracer's Avatar
 
Trader Feedback: (34)
Join Date: Jun 2004
Location: Maryland
Posts: 5,348
FWIW, I had a set of KB SFCs on my 86 before I went with the MM TA. After the KBs were cut off, I weighed them; 13#s for the two. Before I had the MMs installed, I weighed them; 26# for the two. I will also note that before that experience I put KB's SFCs and jacking rail/matrix on my 01 which have been on the car since new. I've crushed the SFC in a couple of places using a floor jack. Now I only use the jacking rails which work fine. There is no way the MMs will crush and haven't despite many times using them with the floor jack.
qtrracer is offline  
post #13 of 15 Old 05-30-2016, 03:26 PM Thread Starter
Registered User
 
dencon's Avatar
 
Trader Feedback: (0)
Join Date: May 2015
Location: Phoenix, Az.
Posts: 56
well I stepped away from this for a few weeks. After talking to a friend of mine that has a race chassis fabrication background. as I do too. we came up with this. Heating the connectors will make the metal weaker. bending was a challenge too. So I went ahead and put a slice at the back of each bend.


Put them back up to the underside of the car and got them in place. They formed to the bottom of the car and I tack welded them. Look at the difference to the bend of the connector out of the box. I do not believe my car is that bent or off.

Also with the weakest part of the connectors is at the bends. After I weld and fish-plate the cut area. They will be stronger then out of the box from LMR.
Now I know there is going to be someone on here that is going to say I just ruined the connectors by cutting them. This is a normal thing in any chassis fabrication as long as it is done right. Plus, 3 straight pieces of square tubing welded in a Z with fish plating done. is way more solid then one piece bent into a z.
This is a NASCAR Cup car chassis.

Now on to the seat brace. Any of you 86 that? It is in the way and more of a P.I.T A. then it is worth. I personally think it is more of a marketing deal anyways. Back in my Camaro days. I put subframe connectors in and never once did they come with these. First time seeing this is in the Mustang world. Besides, My plan is to put a cage in this car and I am going to build the seat mounts into the cage itself. So i am not going to bother with them.

1988 GT
2006 V6 S197
dencon is offline  
post #14 of 15 Old 05-30-2016, 03:38 PM
Registered User
 
Jack Hidley's Avatar
 
Trader Feedback: (5)
Join Date: Apr 2000
Location: Danville, CA USA
Posts: 2,975
The seat braces are by far the most important part of the subframe connectors. Do not leave them off. Without them, there is nothing to brace the center of the floorpan to the subframe.

The middle of the floorpan on these cars being unbraced, is what primarily leads to the fitment problem that you ran into. The weight of the driver and passenger pulls down the middle of the floorpan over time. The second issue you had with fitment was due to the construction of the subframes. The LMR connectors have reinforcement plates welded at the bends when you receive them. That is a big mistake. It keeps the connector from being bent to fit the car. The reinforcement plate should be the last thing welded onto the car.

Jack Hidley
Maximum Motorsports Tech Support
Jack Hidley is offline  
post #15 of 15 Old 05-30-2016, 05:19 PM Thread Starter
Registered User
 
dencon's Avatar
 
Trader Feedback: (0)
Join Date: May 2015
Location: Phoenix, Az.
Posts: 56
That makes sense with the seat brace. I just need to notch them a little more. I will put them in. Thanks for hat input.

1988 GT
2006 V6 S197
dencon is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
frame connectors? daviszx3 General Mustang Tech 18 10-31-2012 11:12 PM
For Sale 2001 Mustang GT Convertible! New Motor, Top, Clutch, Headers... 1mustang Mustangs For Sale/Wanted, 1999-2004 4 07-16-2012 09:22 AM
Need advice on sub Frame connectors Fast Eddie 2k1 GT GT & SOHC 19 12-17-2001 06:39 PM
Cost to install subframe connectors.. jeremyfo GT & SOHC 14 12-13-2001 03:21 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome