RTI Ramp?

[Gigantor]

Check out Truckstv.com about ?2? months ago they built one. They should have the blue prints on the page. I hope this helps. I just use my rock wall. Not the same but it still does the job.
Good luck

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Nick
'93 XLT 4 Door 4x4
Bosch Plat+4's with SplitFire Dual Core wires and a
K&N Air Filter with a Modified Air Box

 

[EB Bauer]

It's a cool link but I couldn't find anyhting about the ramp. Anyone else have any idea's?

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Scott Bauer
'91 Eddie Bauer

 

[mattadams]

are you going to be making out of steel or wood or what? Hope your good at geometry - basically to figure out lengths and angles. http://www.explorer4x4.com/adams_ramp.jpg <--theres me doing the rti. Basically you'd want one piece to drive up on thats about 10 feet long, maybe upwards of 15, I don't know if there is a real standard.... Just know your angle so you can do the proper calculations. Normally its between 20-25 degrees. Make sure its supported so you can drive a heavy vehicle up it (how you do that is up to you), and preferably at least 1.5-2 feet wide. You will probably want to run a tape measure up the side so you know how many inches you can make it up. I think because there are so many different ramps (some extreme four-wheelers use like 30 degree ramps, more simple designs are around 20 degrees) there is no set blueprint, its just how people want to make them. Just make sure you can measure the angle and remember, to measure the length of the angled piece its a squared (the last support piece) plus b squared (the bottom) equals c squared (the angled piece). The pythagorean theorem.

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Matt Adams
94 Explorer 4-door nick-named "Tippy"
http://bart.is-s.com/~explorers/explorer/explorer.html

 

[EB Bauer]

cool, thanks for the info!

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Scott Bauer
'91 Eddie Bauer

 

[Rick]

The "standards" for ramps are 20-25&30 degrees.

The first ramps were 20 degs and were getting maxed out all the time. Then came the 25deg ramps. Same problem. The 30 deg ramps have been maxed out also by rigs such as the Scorpion.

When will it end?

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Rick Horwitz
Editor
explorer@4x4central.com

www.4x4central.com

 

[ntrpriz]

Rick,
It will end when I max out a 90 deg ramp!!.

Matt,
How did you get so much articulation. Do you get that much with just a lift? Or did you add anything special?

Steven

 

[mattadams]

I really don't have that much. Dave Meisner scored quite a bit higher then I did, and the Zimmermans Explorer, now THAT has some flex! Mine is just the lift and I had the anti-sway bars removed.

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Matt Adams
94 Explorer 4-door nick-named "Tippy"
http://bart.is-s.com/~explorers/explorer/explorer.html

 

[EB Bauer]

I am trying to build an RTI ramp. I am doing some mods on my rig and want to test each mod to see the performance I am getting from each mod. Does anyone have and blueprints for the ramp or can tell me how to build one?

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Scott Bauer
'91 Eddie Bauer

 

[RangerX]

Matt,
Just curious- what did you score on the ramp, and what degree ramp was it?

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Bill Collins
93 Ranger XLT 4X4
Modified

 

[rpenner54]

I have found some plans for a 20 degree ramp on this site.
http://earlybronco.homestead.com/Ramp.html



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Ryan Penner
1992 Explorer Sport

 

[mattadams]

Mark - I think something is wrong with your calculator on that page. The ramp we were doing I think was a 26 degree ramp, and I made it up 72 inches, and it said I had a score of 1466 at 26 degrees and if I input 20 degrees it puts my score around 1800... I know its good but not that good Dead Link Removed. Bill - I think my score was somewhere around 650-700 on the 26 degree ramp. I think Dave Meisner (dmeis) got about a 725-750. Don't remember exactly.

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Matt Adams
94 Explorer 4-door nick-named "Tippy"
http://bart.is-s.com/~explorers/explorer/explorer.html

 

[Maniak]

Here is a url for all of the people who don't have access to a RTI ramp. You just need to find a ramp (like a loading dock). Drive up it like you would a regular RTI ramp (keeping only 1 tire on the reamp) and mark the ramp (where your front axle is). Now drive back down the ramp and measure how high (verticle) the mark on the ramp is compared to the flat ground. Now go to http://mark.legendz.com/ramp.html and enter the degree ramp you want the score for, your wheelbase and the measurement you took. This page will give you your RTI and the distance you would have driven up the RTI ramp. Here are some pictures of our explorer being ramped this way.. http://mark.legendz.com/explorer/ramping-explorer-1999.html

One day I hope to build a ramp but until then I just use this method to see if my mods help/hurt my articulation.



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Mark
mark@legendz.com
http://mark.legendz.com
Off-Road and Motorcycle Information, Pictures and Movies

 

[Maniak]

I checked the numbers again and they seem to work fine. Most of the time when people get wierd numbers is because you put in how far "up the ramp" you went and not how high your tire is off the ground. I don't think your tire was 72 inches off the ground.. it was more likely 72 inches up the ramp. I don't have a way to figure it out by entering how far "up the ramp" you went. This is really for people who don't have the "up the ramp" number.

If the explorer wheelbase is 118 inches (I think that is right).. 71.85 inches up a 26 degree ramp is only 31.5 inches vertical (not 72) and comes up to 609 for a score on a 26 degree ramp. I think this is the score you were looking for. Your score may be higher.. I'm not sure on the wheelbase of the explorer... if it is less than 118 your score is actually higher..

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Mark
mark@legendz.com
http://mark.legendz.com
Off-Road and Motorcycle Information, Pictures and Movies


[This message has been edited by Maniak (edited 02-17-2000).]

 

[mattadams]

ok I did the math and heres what I figured out (assuming it was a 26 degree ramp) I went up 72 inches, meaning the tire was 32.5 inches off the ground (lots of math). The wheelbase is actually 112. That came out to ~662 (though it showed 73.5 inches or something so I must've missed some math somewhere). But approximately 662 on a 26 degree ramp, not too awful bad Dead Link Removed.

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Matt Adams
94 Explorer 4-door nick-named "Tippy"
http://bart.is-s.com/~explorers/explorer/explorer.html

 

[FMExplorer]

Ok - Being new here, what is an RTI ramp? I can see it is used to measure how far up a vehicle can travel a given angle, but what standards are there? Do all 4 wheels need to be on the ground? What does the info tell me?

Jon M

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Jon McLeod
'93 XLT
K&N Drop-In
Kenwood Audio
Rancho RS5000's

 

[mattadams]

Jon - The RTI ramp tests your flex. The way you test it is driving up the ramp with one wheel on the ground, and the moment any tire leaves the ground you stop and see how far you made it up the ramp. If you have poor, extremely stiff suspension the wheels will not have much flexing and one will come off the ground sound. If you have a very flexible suspension the wheels will either sink into the wheel well or drop out of the wheel well a long ways before leaving the ground, and that's better for off-roading. http://www.explorer4x4.com/zimsramp.htm <--now THATS a good ramping explorer, thanks Gloria. That vehicle has a lot of accessories that allow it a ton of flex and mobility.

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Matt Adams
94 Explorer 4-door nick-named "Tippy"
http://bart.is-s.com/~explorers/explorer/explorer.html

 

[FMExplorer]

Dead Link Removed
Holy s*!t batman! I can see I have some major work to do. HOwever, in SW Florida we don't have a ton of hills or bumps to deal with - just dirt and mud - lots of mud! I am not planning on doing any suspension mods for another year so I guess I should avoid playing with the big boys!

Jon M

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Jon McLeod
'93 XLT
K&N Drop-In
Kenwood Audio
Rancho RS5000's

 

[FMNavajo]

Here's an Autocad drawing of a 23 degree ramp that might interest you and others. Dead Link Removed
(Excuse the 'Jeeps Rule' caption, it wasn't my idea)

FM

 

[Extreme4x4]

Thanks Matt, for showing the pics of the Beast. Just for info sake, she will ramp over 1000 on the 20 degree ramp, and 767 on the 30 degree.

As far as the ramp formula goes, it is real simple. Measure the distance the truck has traveled up the ramp (base of ramp to center of tire). Divide that distance by the wheelbase of your vehicle. Thus 72" divided by 111.5" = RTI of 646

At least this is how all the clubs and events that I have been to have done it.

Gloria
93 EB Explorer (highly modified)
94 F150 Lightning