[08Canyon]

my speedometer is off by like 2. if it says im goin 55, im goin 56-57. when i was runnin 31x10.50s if i was goin 55 i was really goin 53. so its actually better for my truck now with the bigger and skinnier tires. less RPM and better gas mileage. the 31 bfg's were also 6lbs heavier then the 33 bfg's i got. my truck is 2wd with the "offroad" package. with the 31s i was gettin around 235 miles to 3/4's of a tank and now im gettin 260 miles to 3/4's of a tank.

You should be off by more than 2 mph at 55mph with ha 33" tire. What was your stock tire size? Plus, the mph is off by a percentage at all speeds. If you are off by 2mph at 55, you are off by 1mph at 27, and harly off at all at slower speeds. It's not mathematically possible for it to be accurate at low speeds with a 2"+/-diameter size.

I'm not trying to sound rude, just trying to figure out how your speed-o is so close. Plus if you are not factoring in the math correctly, this information may prevent you from a speeding ticket. I'm off by 4/5 mph at 65, dash reads 62 and I'm driving between 66/67 actual. I went from a 29" to a 31.7" Of course the Z71/Offorad trucks have a taller stock tire than I did so the differences are less extreme than in my case.

Sorry to the lady OP for taking over. I don't meant to hijack your thread.

 

[FlyingTomato]

I plan on doing keys in the front, shackles in the rear, and then 1-2 inch body lift when I finish all this other mess I'm doing. It doesn't take a ton of lift to make these trucks look good.

 

[big_block_dragon]

Sorry to the lady OP for taking over. I don't meant to hijack your thread.

its cool. im up for all suggestions and thoughts from the nation. and you didnt hijack it. lol

 

[BCS]

I would also suggest a body lift plus shackle/torsion bar crank. I have the 3" body lift and 2-2.5" crank. Can run 33's but I need new wheels to do that.

 

[crazyeyez]

Keys and shackle's make's your truck ride super stiff.

???

i have 2" shackles and TBs cranked to level out, and the ride is not "super stiff"
:shrug:

 

[moody1]

Well if you were going to do this in stages. You could always do shackles in the rear, and just crank Tbar till level. That would give you a nice little lift with out breaking the bank. Then do body lift they run anywhere from a little over 200 to about 400 or so depending on size. Down the road a little you wanted to add new keys it not a big deal.

 

[royrjs]

people, cranking doesn't change the torsion ratio. there's no way in the world/universe/heavens cranking will make the ride stiffer; the upper ctrl arm gets way closer to the bumpstop, so you might feel that harsh bump, but that's a diff story.

Shackles won't change the ride, either.

Both these mods just change the position of the tire in relation to the frame.

Now, going back to biz with the OP....

If you go offroading, you better get the TBs cranked and shackleORadd-a-leaf. Why? Cause it'll give you more clearance on obstacles. If you decide to also go on the body lift, you'll be able to rock bigger tires (just watch that front body mount, it might need trimming, depending on how much the tire sticks out).

 

[GMInlinePower]

I just recently did the pro comp aal and tightened to torsion bars two turns to an inch lift in the front. I am very happy with the ride quality and characteristics, next step will be shackles, just my $0.02 on order of what I think should be done.

 

[crazyeyez]

people, cranking doesn't change the torsion ratio. there's no way in the world/universe/heavens cranking will make the ride stiffer; the upper ctrl arm gets way closer to the bumpstop, so you might feel that harsh bump, but that's a diff story.

Shackles won't change the ride, either.

Both these mods just change the position of the tire in relation to the frame.

Now, going back to biz with the OP....

If you go offroading, you better get the TBs cranked and shackleORadd-a-leaf. Why? Cause it'll give you more clearance on obstacles. If you decide to also go on the body lift, you'll be able to rock bigger tires (just watch that front body mount, it might need trimming, depending on how much the tire sticks out).

:true:

One thing, tho, that will change the ride is what shocks you go with.

Also, a side note... With the BL, you should be able to run taller tires. That will give you some extra ground clearance. Shackles and TB crank with stock tires will get you incresses clearance(except at rear diff). Now, crank/shackle lift PLUS taller tires will net you the most over all clearance.

 

[tadams843]

i havent mathematically calculated my speed-o, i go off my gps which is more reliable than my speed-o. my stock size is a 265/75/r15 which equals out to a 30.64x10.43, with those tires, my speedometer was off. i dont remember exactly how much though. you have to take into consideration that every vehicle is different and none are made perfect. i could be wrong but like i said i havent mathematically calculated it but my gps seems to be perfect, sense its ran from a satellite, its never caused me to get a speeding ticket. im not trying to sound rude either, just explaining

 

[08Canyon]

people, cranking doesn't change the torsion ratio. there's no way in the world/universe/heavens cranking will make the ride stiffer; the upper ctrl arm gets way closer to the bumpstop, so you might feel that harsh bump, but that's a diff story.

Shackles won't change the ride, either.

Both these mods just change the position of the tire in relation to the frame.

Now, going back to biz with the OP....

If you go offroading, you better get the TBs cranked and shackleORadd-a-leaf. Why? Cause it'll give you more clearance on obstacles. If you decide to also go on the body lift, you'll be able to rock bigger tires (just watch that front body mount, it might need trimming, depending on how much the tire sticks out).

I can 100% disagree with the fact the ride doesn't change with shackles. I put shackles on one night, keys another day. From the moment I pulled out of the garage the ride took on an different feel. It rebounds much more quickly. It may not be very much more firm, but it sure does rebound fast, jolting the rear of the truck.

I also noticed it was stiffer up front, but not hugely.

 

[08Canyon]

I just recently did the pro comp aal and tightened to torsion bars two turns to an inch lift in the front. I am very happy with the ride quality and characteristics, next step will be shackles, just my $0.02 on order of what I think should be done.

Be sure to measure again after you have driven it. It WILL change from what it was when it was after you made initial adjustments.

Don't forget to have the front end alignment done.

 

[big_block_dragon]

I do go off roading. Everyday as a matter of fact. Not crawling over anything... yet... but im wanting more ground clearence than what ive got.

And i would like to thank all of y'all for all the helpful insight on the matter it is greatly appreciated!

 

[big_block_dragon]

i got a shackle lift for the rear havent put it on yet. what would i need for the front so my tires so wear real bad.

 

[08Canyon]

If you are just trying to raise the front to be level with the rear, just adjust the torsion bar keys as previously discussed.

If your tires are wearing out, it's time for an alignment. You will need an alignment after doing any front end suspension work anyway.

 

[onelow1ton]

people, cranking doesn't change the torsion ratio. there's no way in the world/universe/heavens cranking will make the ride stiffer; the upper ctrl arm gets way closer to the bumpstop, so you might feel that harsh bump, but that's a diff story.

Shackles won't change the ride, either.

Both these mods just change the position of the tire in relation to the frame.

Now, going back to biz with the OP....

If you go offroading, you better get the TBs cranked and shackleORadd-a-leaf. Why? Cause it'll give you more clearance on obstacles. If you decide to also go on the body lift, you'll be able to rock bigger tires (just watch that front body mount, it might need trimming, depending on how much the tire sticks out).

Well I'm not going to argue this much because you are right and wrong at the same time

Cranking the t-bars does make a stiffer ride but it's not because you stiffened the bar it's because of the control arm angle and the higher you crank the steeper the angle on the control arms the harder the suspension has to work to let the truck compress the suspension

And shackles on our trucks don't stiffen the stock spring but the longer shackle changes the angle of the shackle and in turn affects the arc of the spring making it harder to compress , if our shackle mount was about 1/2"-3/4" forward on the frame the longer shackles would be at a much better angle and would be a lot softer ride and would likely. Get just a bit more flex out of the rear

:shrug:

 

[big_block_dragon]

Well im trying to do all this little by little because of money being the issue. I havent put the shackles on yet because im waiting to get 2 new tires for the front and i need an alignment as it stands anyways. But i do consider any and all suggestions and help on this. I am new to the truck world so any help is bettr than no help.