As everyone ever try to made their own tubular K-member ?

[ELLIOT]

Hi,

I have been looking for the RMS K-member for months now but I don't have 5k$ to put into that kind of piece and I will probably never have ... Too bad for me, great for the other !

I have been thinking about doing my own. It doesn't look to hard to do with all the tools.
Does someone have ever done this ?

For the parts after some research I will need

- Mustang 2 rack N pinion 135$ on ebay

- A front sway bar that look like the 70 one (someone as an idea or know where it comes from ?) Or I could just adpat one from Ridetech or even build one.

- A set of tubular control arm: if there is something that I do not have to build that would be great ! plus, there are so much good parts on the markets.

For the spindle I have been thinking about keep it stock with the lower balljoint as well, cut the end of it. And build a new steering pivot point that would come between the spindle and the balljoint.

As for the lower control arm, I'm wondering about the fact that the original K member and the RMS one have the same lower control arm pivot point. Does someone have any idea ?

I may need some dimension from the RMS K-member, if someone could help me ?

Thank you for the help

 

[smb03]

yup

 

[Ugk]

yup

View attachment 362205

Nice, are you driving your car with it ? We're in the middle of making something similar.

 

[smb03]

i built it for an LS3 swap, still has the big block in it right now

 

[Ugk]

I like, I just pulled a ls in my 69 Firebird.good motor.

 

[HYRDGOON]

bherman did his own if you can find his build thread in the project car section but his is above and beyond a normal garage build as he had the resources

 

[Mike67]

If your looking for IFS/ Must 2 look on eBay at item #162068920687. Helix is the mcg, don't know a whole lot about it but have been considering it...for $500 might be worth a gamble....????....

 

[Budnicks]

Check into QA1 too really affordable stuff...

 

[ELLIOT]

Not looking for QA1 stuff. I want to go coil over on my Charger because if I want to put header on my car one day I got to delete the torsion bar.

Plus the feel is way better than the original suspension even with new poly bushing and tubular strut rod ...

To the RMS alterkation owner, what's the tubing size of the K member ?

 

[Hemirunner]

Here's my version of it. I own an RMS I bought for my other car. His K-member design wasn't going to work in this car so I made one.

I should have the A-arms done shortly.

The center beam is shaped to clear the forward turbo headers.

 

[ELLIOT]

Really cool Hemi Runner ! Do you have any plan of you build ?

Or at least the main dimension ? That would really help me.

What kind of tubing did you use ? I see that you bend a tube profile to join each K member rail. Why did you go this way instead of square tubing like RMS ?

What are your plan for the steering and spindles ?

 

[Hemirunner]

Really cool Hemi Runner ! Do you have any plan of you build ?

Or at least the main dimension ? That would really help me.

What kind of tubing did you use ? I see that you bend a tube profile to join each K member rail. Why did you go this way instead of square tubing like RMS ?

What are your plan for the steering and spindles ?

I have no drawings of it, sorry. I used a factory K member to get the spacing and just centered the end rails on it. I used a bent 1/8" wall 2x2 because I have a friend who could bend it for me. My RMS is made of bent square tubing just like this. I just moved the rails out to clear my headers. I'm using Mustang2 spindles from Speedway. I ordered the ball joint rings from there too. I'm modifying the spindles by welding on my own steering arm as well.

 

[ELLIOT]

Thank you Hemirunner !

I guess that the easiest way for me to start is by build a negative jig of my K member ? This way I would be sure that it would be square.

Do you have any pictures of your modified spindle ?

For the lower control arm, what did you do for the lower ball joint ?

Thank you for the help ! ;)

 

[Hemirunner]

Thank you Hemirunner !

I guess that the easiest way for me to start is by build a negative jig of my K member ? This way I would be sure that it would be square.

Do you have any pictures of your modified spindle ?

For the lower control arm, what did you do for the lower ball joint ?

Thank you for the help ! ;)

A negative jig would be the way to go.
I haven't modified the spindles yet. Here's my pile of parts. I bought the regular Moog ball joint and it appears to be used for all 4.

We bought raw stock from McMasterr Carr to make the shafts (in blue sleeves), the LCA pivot tubes, and the shaft bushing retainers. I found the bushings (red pieces) on the internet from some dune buggy shop for next to nothing.

 

[Hemirunner]

I confirmed that the RMS lower fits my K-frame so it's clear sailing from this point forward.

 

[smb03]

I confirmed that the RMS lower fits my K-frame so it's clear sailing from this point forward.

nice setup, have you checked to see how low of a ride height you could get, seems like the shock sits much lower. but you do have a pinto style spindles now so it might make up for it

 

[Hemirunner]

nice setup, have you checked to see how low of a ride height you could get, seems like the shock sits much lower. but you do have a pinto style spindles now so it might make up for it

It's a MustangII spindle (same thing) and I have this same suspension on my other car. The coil over is almost all the way up and the ride height was as low as the 7" deep sump pan would allow. This car will have a taller tire on front so the spring will get cranked down. If I can't get it low enough, they make 2" drop spindles I can change to.

 

[Hemirunner]

Here's the RMS modified spindle. You can see the original steering arm is removed and the new one that's added. The length and height position of the arm are critical to minimizing bump steer. The rack mounting position has to be right as well.

 

[smb03]

It's a MustangII spindle (same thing) and I have this same suspension on my other car. The coil over is almost all the way up and the ride height was as low as the 7" deep sump pan would allow. This car will have a taller tire on front so the spring will get cranked down. If I can't get it low enough, they make 2" drop spindles I can change to.

gotcha, im bulding a new k frame for my roadrace charger using wilwood spindles based off a pinto so ive gotta do pretty much what ur doing. im assuming ur building a drag car?

 

[Hemirunner]

gotcha, im bulding a new k frame for my roadrace charger using wilwood spindles based off a pinto so ive gotta do pretty much what ur doing. im assuming ur building a drag car?

It's a street/drag/standing mile car. I have a build thread on here in the members build section. That Wilwood spindle is virtually the same except that is has a separate steering arm so it's not side specific.