The last gratuitous flex pics...

[Krawler68]

got the shocks mounted Saturday morning...

http://www.offroadrepublic.com/gallery/albums/album79/abi.jpg http://www.offroadrepublic.com/gallery/albums/album79/abk.jpg

Install my proportioning valve, 10 lb. residual valve, tighten my oilpan bolts, install my new oil pressure sending unit and water temp sender... See some of you kids at the Slabs Friday night.
Doug

[Fredo]

I like how you're standing on that tire to keep it relatively close to the ground. :flipoff2: Not too bad though man.

[eight]

How high is that front tire off the ground?

[Krawler68]

It wasn't really that high off the ground. It looks like I'm standing on the tire here, but i was just messing around. http://www.offroadrepublic.com/gallery/albums/album79/abj.jpg

That's as high off the ground as it came... Considering we had the front tire 42" off the ground I don't think it's too bad. When i finally got my rear shocks mounted they ended up limiting my rear droop a little. I figure I may actually need to use some limiting straps, because right now i think I'm getting a little much flex.


Doug

[Cajun]

Gay.




:flipoff2:

[Krawler68]

Yes it is... :flipoff2:

I wish I had a scout... they are so much stronger and lighter that I don't see why everybody doesn't own one... :confused: :flipoff2:

Doug

[Krawler68]

I wouldn't exactly say spring over was "Nearly Stock"... Jeeps that are sprung over flex VERY well. Especially YJ sprung or stock sprung ones. Stevens had some pretty amazing flex when it was SOA'ed.


I would also venture to say that it would be harder to fit 38's on your jeep and maintain that sort of tire movement. Especially with the mere 3.5" suspension lift I have. Not saying it's anything incredible... we'll see what poseur numbers I get when I get a chance to run it up a ramp.


I am still thinking I will want to limit the front movement a little, and control the droop on the rear axle.

Doug

EDIT: I also failed to notice that you have QUITE a bit of wheelbase on me... which means you should be able to have a tire up higher for your wheelbase to achieve the same flex as a shorter wheelbase. I'm only a 91" wheelbase.

[eight]

You can estimate your RTI number with a little geometry.

(Height of tire off ground / sin (ramp))*(1000 / wheel base)

Your axles/wheels/tires are quite a bit wider than mine. That makes a big difference. The only difference that wheel base makes is whatever I get from frame flex. It's hard to explain. Wheel travel is the same no matter the length of the wheel base. The same suspension will flex the same on a CJ8 or CJ5 if they both weigh the same.

Now lets say at full flex both of our axles are at 30 degrees relative to the ground. My tire would be 32.5" off the ground while yours would be 39" off the ground if your axles are 59" plus 1.5" spacers plus 15x10 4" bs wheels plus 14.5" wide tires.

[Cajun]

Originally posted by Krawler68
Yes it is... :flipoff2:

I wish I had a scout... they are so much stronger and lighter that I don't see why everybody doesn't own one... :confused: :flipoff2:

Doug

While probably not lighter than anything save an M1A1, it'll definitely be stronger when I get through with it...that is, if I ever get to work on it again!

[Krawler68]

I understand, but it's difficult to get any measurments on the hypothetical triangle you would use for the SIN measurment in these pictures, and I'm tired of flexing it on a forklift... I'm putting it on the trailer and I'm going wheeling.

I think "Hypothetically" That should leave my with somewhere around a 950 on a 30* ramp... take from that what you will since most ramps are 20-23* not that any of it matters... balance in much more important.

Doug

[Krawler68]

Originally posted by Cajun


While probably not lighter than anything save an M1A1, it'll definitely be stronger when I get through with it...that is, if I ever get to work on it again!

That's because you're importing a Ford driveline into it. :flipoff2:

It better be strong... any projected weights on that thing? I think I'll swing by the coop tonight and weigh in the EB to see how much it weighs... I am praying for 4200+- pounds.



Doug

[Krawler68]

I think i used 42" while you used 38"... that would explain the different numbers.

your wheelbase is 108" right?

Doug

[eight]

103.5"

And yes, I did use 38", 42" still puts it at 923.

[bburris]

"around 950" is closer to 923 than 835 Mr. Wizard

[Krawler68]

Hence "somewhere around 950"... I wasn't sure I had the right number for SIN...

we'll see how it does... I think anything over 1000 on a 23* will be more than sufficient.


Doug

[Chadnutz]

eight:

I'm pretty sure that wheelbase has nothing to do with frame flex. When I want to understand concepts I blow the factors way out of proportion. Say I want to know if a large tire or a small tire takes a pot hole better. Well then I say what if I had a 30' tire. It wouldn't even feel a pot hole. Same goes with wheel base. Say I have a 100' wheel base. The angle of the truck would be extremely low from center of the front tire to center of the rear even if my front tire was 5' off the ground. RTI scores must factor the angle from the center of the rear to the center of the front tire. They higher the angle, the better the flex. Longer wheelbase vehicles can drive further up RTI ramps. In other words, a long wheelbase truck with equivalent flex as a short one would have the same wheel center to wheel center angle as a short wheelbase rig would.

[Krawler68]

that's why wheelbase is in the denominator in the RTI calculation.


Doug

[Krawler68]

maybe I have always misunderstood how RTI is calculated... but the RTI I've seen taken is off a line perpendicular to the ground from the hub and measured to the beginning of the ramp... ahving NOTHING to do with the placement of the rear tire.


Doug

who give a **** if the frame flexes? If it flexes it flexes and that's a bonus on your mall crawler score... I am personally glad i have increased the rigidity of my frame with a cage tied into it... don't care if it costs me ??? points on the Ramp.

[eight]

You're right about that RTI thing, but then that number is divided by the wheel base. Anyway, none of this matters, we'll just end this stupid discussion, I've got studying to do.

Frame flex is a bad thing on most vehicles (corrected for Rex), mine just seems to do it alot. Hence the welder, so I can fix it when it cracks.

[Fredo]

oh yeah...well I can piss farther than all of you. :flipoff2:

[Krawler68]

I'm sure you can... it only stands to reaons that the man with the smallest piss hole can build up more pressure and hence spray a stream further than someone like Ryan or Myself whol has to deal with a severly reduced amount of backpressure due to our rather large equipment. :flipoff2:


Doug

[Fredo]

ah....point doug....very nicely done my friend. Yet, it stands to reason that the person with the longest equipment may not have the pressure, but does in fact have the furthest reach, hence I can piss the farthest.

[Krawler68]

I'd be curious top find out the inverse relationship between length of equipment and size of piss hole in their ability to piss said distance.

Doug

[bburris]

here's what William Forsythe has to say

[Rex]

Frame flex is a bad thing, mine just seems to do it alot. Hence the welder, so I can fix it when it cracks.

Not if its engineered into the vehicle. My mog's frame is engineered to flex and has engine mounts and tranny mounts that allow it too, ever wonder why mogs flex so well?