Installing MM K-member - centering in car - Ford Mustang Forums : Corral.net Mustang Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 Old 05-09-2011, 10:37 AM Thread Starter
Registered User
 
LTDScott's Avatar
 
Trader Feedback: (2)
Join Date: Nov 1999
Location: San Diego, CA
Posts: 910
Installing MM K-member - centering in car

I'm in the middle of installing a Maximum Motorsports K-member in my car. After bolting in the new K-member, I checked the front to rear and diagonal distances per the directions and amazingly only had to adjust the right side forward about 1/8". After that, the measurements were spot on. I was expecting to have to move the K-member around quite a bit to get it straight, but I suppose the engine mounts will kinda put it close where it needs to be right off the bat.

Anyway, once I re-measured and torqued the bolts, I noticed that the flange of the K-member that sits flat against the "frame rail" where the spring pocket used to be protrudes out about 1/4" further on the driver's side than the passenger side. Does this sound plausible? I know this is a mass produced 1980s American car, so it shouldn't be surprising that things aren't completely even on both sides, but now I'm worried about tire clearance on the left. Things are already going to be tight since I now have a wider '87+ spec K-member and '96+ spindles compared to the '85 K-member and '94 spindles I was using before. I'm already reconsidering my decision to purchase SN95 arms instead of Fox length.

Does anyone who has this K on their car have the same issue? I'm confident in my measurements, but if I did get it slightly wrong, is it something that would be detected once I get a front end alignment?


85 Ford LTD LX - One of 3260 LXs, Cobra SEFI conversion, AFR 165s, T5, Cobra brakes, buncha other stuff

Last edited by LTDScott; 05-09-2011 at 04:32 PM.
LTDScott is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 05-09-2011, 04:33 PM
Registered User
 
qtrracer's Avatar
 
Trader Feedback: (34)
Join Date: Jun 2004
Location: Maryland
Posts: 5,359
My factory k on the 86 favors the P/S by +/- .5". The car has never been in an accident and tracks absolutely straight with no odd tire wear issues. This "off-set" was not noticable until I put on 04 a-arms, 94/95 spindles and 17x8 wheels which increased my front track 2.5" over stock 86 and about 1.5" over 87-93 v8 cars. At 25-1/8" ground to lip and -2* camber, the P/S tire hits the fender hard in a typical autocross driving class. So hard that the cone tenders reported smoke coming off that tire in tight left handers. On the street, I didn't notice anything except over the occasional bump. Of course, I heard the noise but didn't see the smoke. Even so, tire damage was minimal and limited to the tread shoulder. With the MM K and Fox-length a-arms, even if there is a slight bias to one side the total front track should be +/- 1" narrower than mine is currently. So unless you are running 9" wheels and wider tires than say a 245, I'm not at all certain you will have a clearance problem or even notice such a small bias, so long as everything is square. Even mine is hard to see at rest.

qtrracer is offline  
post #3 of 6 Old 05-09-2011, 05:31 PM Thread Starter
Registered User
 
LTDScott's Avatar
 
Trader Feedback: (2)
Join Date: Nov 1999
Location: San Diego, CA
Posts: 910
Thanks for the feedback. Tire clearance is a big issue for me because I don't have the luxury of big wheel openings like you.



My tires have to tuck up inside the fenders quite a bit. I actually switched to '05+ 17X8 wheels to gain more offset for a better fit. Previously I was running the '85 K-member with '94 control arms and spindles. According to Jack Hidley, the MM K, with MM SN95 arms will push things out .30" per side, and the '96 spindles push things out about .35" further, so in total the front end will be about .60"-.70" wider than before.

I'm currently running 1/8" spacers and there's just adequate tire clearance at the moment. If I take out the spacers and add the .65"ish from the K/arms, I'm at a net increase of about .50" on each side. Now you can see that the 1/4" difference caused by the K-member being off center matters a lot.

85 Ford LTD LX - One of 3260 LXs, Cobra SEFI conversion, AFR 165s, T5, Cobra brakes, buncha other stuff

Last edited by LTDScott; 05-09-2011 at 05:34 PM.
LTDScott is offline  
Sponsored Links
Advertisement
 
post #4 of 6 Old 05-24-2011, 12:38 PM
Registered User
 
Trader Feedback: (9)
Join Date: Aug 2002
Location: St. Petersburg, FL
Posts: 2,259
I just installed mine as well. Mine is the opposite. Looking on the inside of the engine bay, I can see more of the flange on the drivers side. Makes it look like it might be too much to the passenger side but the measurements seemed good. I'll double check it again when I get back under the car next week.

93 Coupe w/2012 Boss 302 Swap, Maximum Motorsports, Forgeline, Magnum.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
93coupe com

68 Coupe w/rust
01 Cobra w/wife
stangonline is offline  
post #5 of 6 Old 12-31-2011, 04:56 PM
Registered User
 
mark007's Avatar
 
Trader Feedback: (0)
Join Date: Jul 2002
Location: houston
Posts: 880
Quote:
Originally Posted by LTDScott View Post
I'm in the middle of installing a Maximum Motorsports K-member in my car. After bolting in the new K-member, I checked the front to rear and diagonal distances per the directions and amazingly only had to adjust the right side forward about 1/8". After that, the measurements were spot on. I was expecting to have to move the K-member around quite a bit to get it straight, but I suppose the engine mounts will kinda put it close where it needs to be right off the bat.

Anyway, once I re-measured and torqued the bolts, I noticed that the flange of the K-member that sits flat against the "frame rail" where the spring pocket used to be protrudes out about 1/4" further on the driver's side than the passenger side. Does this sound plausible? I know this is a mass produced 1980s American car, so it shouldn't be surprising that things aren't completely even on both sides, but now I'm worried about tire clearance on the left. Things are already going to be tight since I now have a wider '87+ spec K-member and '96+ spindles compared to the '85 K-member and '94 spindles I was using before. I'm already reconsidering my decision to purchase SN95 arms instead of Fox length.

Does anyone who has this K on their car have the same issue? I'm confident in my measurements, but if I did get it slightly wrong, is it something that would be detected once I get a front end alignment?
did you ever resolve your issue? how did you regain your wheel tuck?

1990 LINCOLN MARK VII SE
OLD COMBO- STOCK 302 WITH 1500 KB ON TOP.

IN THE WORKS- D.S.S. 331, AFR 185'S(FULLY WORKED OVER), EXTRUDE HONE GT40 LOWER, 2200 KB, 75MM TB AND SPACER, 4IN AFM POWER PIPE, 80 MM MAF, FRPP 1 5/8 UNEQUAL LENGTH HEADERS, MAGNAFLOW X PIPE, MAGNAFLOW MUFFLERS, CUSTOM 2 1/2 EXHAUST ALL THE BACK FROM X PIPE TO TAILS, MSD ELCTRONICS, AND AEROMOTIVE SYSTEM.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mark007 is offline  
post #6 of 6 Old 12-31-2011, 05:14 PM Thread Starter
Registered User
 
LTDScott's Avatar
 
Trader Feedback: (2)
Join Date: Nov 1999
Location: San Diego, CA
Posts: 910
I ended up having to get Fox length arms.

85 Ford LTD LX - One of 3260 LXs, Cobra SEFI conversion, AFR 165s, T5, Cobra brakes, buncha other stuff
LTDScott 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
For Sale 1993 Royal Blue SSP Coupe - Black Interior - CLEAN Chris Woodard Mustangs For Sale/Wanted, 1987-1993 30 04-23-2014 02:09 PM
Cool Video from new 2011 GT AI car dpspeed Road Racing/Auto X 11 02-24-2011 08:08 PM
For Sale 89 Black LX Hatch Supercharged 71k miles Ca Car MINT - Michigan blwnout Mustangs For Sale/Wanted, 1987-1993 3 11-21-2010 12:54 PM
new member..new car...new problems!!!! CobraGreen General Mustang Tech 10 09-22-2004 08:03 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