Turning 6 inch lift into 8 inch? - Ford Powerstroke Diesel Forum
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Old 08-16-2013, 08:33 PM
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Turning 6 inch lift into 8 inch?

I have a 6 inch procomp lift on my truck. I'm wondering if I need anything other than springs and blocks to make it into an 8 inch? Like longer pitman arm etc?
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Old 08-16-2013, 08:47 PM
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Truck is 2008 forgot to mention


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Old 08-17-2013, 06:38 AM
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Outback, an add-a-leaf would be best. I'm assuming that you have already stacked blocks to get to the 6 inch lift. Short of one single block to get that 8 inches of lift, an add-a-leaf and the existing stack should get you where you are trying to go. BTW, I f'in hate stacked blocks, 25 years ago, magazines wouldn't publish pics of your rig if it had stacked blocks because they are unsafe.

Up front, well, it's not quite so easy. With coils, simply putting in taller coils, or spacers fot that matter, has the equal and opposite effect of inducing negative caster. Negative caster is from the axle rolling forward when lifted. To correct this, you either need to add caster shims, or lower the trailing arms in the rear. Either of these will correct the negative caster that taller coils or spacers will induce.

Unless you go to a custom pitman arm, most "out of the box" lifts use the same pitman arm for 6 and 8 inch lifts. There will be enough adjustment in the drag link to compensate for this. This is one time when I think that an adjustable track bar AND a track bar drop bracket should be used. It is mucho importanto to keep the brag link and track bar parallel. Therefore, if you're not going to drop the pitman arm again, then don't dop the track bar again.
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Old 08-17-2013, 10:48 AM
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Thanks for the awesome reply. I was planning on getting a larger single block as like you said, I do have stack blocks which I do not like. I was planning on getting blocks but then found a set of brand new set of rize 8" coils for cheap and I was hoping I could throw them in without many more parts. I will do the cams. Any idea how big of a block I would need for the rear? Thank you very much


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Old 08-17-2013, 11:12 AM
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Ditch the block and go with full springs at that height. Don't forget longer brake lines, abs sensors, drive shaft, etc etc
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Old 08-17-2013, 11:20 AM
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Quote:
Originally Posted by powerstrokeshellback View Post
Ditch the block and go with full springs at that height. Don't forget longer brake lines, abs sensors, drive shaft, etc etc
Having gone to a 6" lift spring, I'd say to use a PMF or OUO traction bar/block lift. Fabricated Unitized Floating Traction Block

Those factory springs are a good ride, but blocks induce wrap, so you install traction bars and that wrap is minimalized. For the amount of money that I spent on the Pro-Comp lift springs and traction bars, I could have bought this set up.
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