Lifting rear suspension

kev73dart · Post by **kev73dart** » Tue Jun 12, 07 10:50 pm

Hi, I know this might sound like a dumb question considering I have been working on cars for years, but what is the best / most cost efficient way of raising the rear suspension on my 74 Dart Swinger.

I am favouring for air shocks, but some have said the cheapest way is to get extended rear spring shackles.
I only want to raise it about 2 to 3 inches

Kev

Anonymous · Post by **Anonymous** » Tue Jun 12, 07 11:06 pm

Ahhhhhhhhh jack up kit

Dave-R · Post by **Dave-R** » Tue Jun 12, 07 11:09 pm

NEITHER! Both are bad practice.

Get the correct springs. or get your existing springs re tempered to the arch you require.

Anonymous · Post by **Anonymous** » Wed Jun 13, 07 6:52 am

Fit a pair of Mono leaf springs, that will do it

Dave-R · Post by **Dave-R** » Wed Jun 13, 07 9:50 am

Wil just hapens to sell them too!

My mate neil in Sunderland fitted a pair and they worked a treat. He has a thread on here about it showing the results.
They were if anything just a little too high at first but have settled to a perfect stance now.

Anonymous · Post by **Anonymous** » Wed Jun 13, 07 2:43 pm

sure did

http://www.moparuk.com/forums/viewtopic ... d17c8432ed

dustymopar · Post by **dustymopar** » Fri Jun 15, 07 11:46 am

Mono's worked for me - just need a beam axle at the front now

These were an inch over stock - and the rest!!

MilesnMiles · Post by **MilesnMiles** » Sat Jun 16, 07 10:11 am

my monos raised the car 2", thread to follow with pics later today!

Anonymous · Post by **Anonymous** » Sun Jun 17, 07 9:09 pm

Hi guys, just curious as to whats wrong with extended shackles

Dave-R · Post by **Dave-R** » Sun Jun 17, 07 9:25 pm

Because of the way rear springs are mounted the bushes tend to act like anti-roll bars. Which is why it is always good to fit poly bushes here.

This feature along with anti-squat control are optimised by the spring attatchment points.

"Lowering the rear mounts on shackles will de-arch the springs and effect chassis dynamics - almost always adversely" it says here in this book I am refering to.

"This negatve effect is caused by a progressive increase in the spring rate as the spring arch is reduced. This means the spring will get stiffer faster - usually causing instabillity".

MilesnMiles · Post by **MilesnMiles** » Sun Jun 17, 07 10:15 pm

Yes, as often seen on jack-the lads Cortina/ Capri in the late 1970s! Horrible handling.

Anonymous · Post by **Anonymous** » Sun Jun 17, 07 11:55 pm

Mick · Post by **Mick** » Wed Jun 20, 07 10:47 pm

Kev
Come round and have a look at my 74 Duster, that's got SS springs.
Mick