Official RTI score thread!!

85yotabox · February 17, 2009, 08:12:45 AM

I looked all over the site and couldnt find one.

So just put down your score and what suspension your running and enjoy!

equation(corect me if im wrong): distance up ramp X 1000 = RTI score
wheelbase

85yotabox · February 17, 2009, 08:15:28 AM

I got a 646 whith chevy 63s, 2" shackles and 3" blocks in the rear and marlin 5s with a 2" shackle in front. (front springs are not broken in yet)

All_Set · February 17, 2009, 10:36:12 AM

Don't you need to take into account the angle of the ramp? Or is "distance up ramp" the measurement in inches between tire and ground?

While I think RTI's #'s are meaningless, I wouldn't pass up the oppurtunity to drive up one.

Did you test both forward and reverse? (Front vs Rear?)

toytank · February 17, 2009, 10:44:21 AM

i beleave that the ramp to be a true score needs to be 30 deg. could be wrong you can test both directions. but forwawrd is the officail rating. the way i understand it is that anything over 1000 is good. i barely made it in at 1056. the measurment is the distance up the ramp without lifting a tire and or touching the ramp with the rear tire. you can better your score by coming in at a high angle and driveing you rear tire past the ramp some officail will not let this pass it depends on the judge.

ajordan1975 · February 17, 2009, 10:45:15 AM

i would like to know too.......

toytank · February 17, 2009, 10:47:21 AM

oh forgot my specs 4" rears up front and 98 ford rears at 111" wheel base.

All_Set · February 17, 2009, 11:30:02 AM

Quote from: toytank on February 17, 2009, 10:47:21 AM
oh forgot my specs 4" rears up front and 98 ford rears at 111" wheel base.

Shackle sizes? configuration?

blackdiamond · February 17, 2009, 11:50:51 AM

The original RTI ramps were 20 degrees. After people starting building their rigs "to max out the ramp" some opted for a 30 degree ramp. A score of a 1000 on a 20 degree ramp is excellent for any stock type suspension. Buggies can exceed 1000 on a 30 degree ramp.

I don't think there is any "official" system since the ramp is just a tool to test suspension. Airing tires down will also improve your score so it's impossible to really make comparision between different rigs. If the tires didn't flex then tire size wouldn't matter, but since taller sidewalls have more flex they yield higher scores.

85yotabox · February 18, 2009, 09:27:22 AM

opps, guess i didnt think that dep into it....

All_Set · February 18, 2009, 11:33:04 AM

Lol. Ya, If ya air up two tires, air down the other two... Ya'll get a better RTI number (so I hear). Whatever.

It's still be fun to drive up one, i've never done it before.

4RunnerChevy · February 18, 2009, 07:14:20 PM

I am truly sorry, RTI ramps mean zero. Its only a way of testing, and has gotten out of hand.

go test it on a rock !

crawlerdan · February 18, 2009, 07:36:05 PM

this thing did a 1000 plus on a 30 deg at foothill offroad in auburn cali

85yotabox · February 18, 2009, 07:49:58 PM

X2 4runnerchevy, my buddy has an early bronco that scores 1400 on a 30 degree ramp compared to my 646 and mine dose just as good on the rocks. i guess its all about weight transfer and stability.

germ · February 19, 2009, 09:44:22 PM

I personally think the RTI is a useless measurement, since there is no standard, and there are several ways to manipulate the data. It's too variable to have any meaning. If the results cannot be repeated and verified, it's basically a useless measurement. The only virtue I can see in it is to help figure out what your tipping point would be, to help avoid a flop. But of course that is just my opinion. I've never done one, and might do it if I got the chance just for fun.

Erik

DTB · February 19, 2009, 09:47:06 PM

EDIT: mispost

Jordan7118 · February 27, 2009, 02:48:45 PM

Ramps are for testing binding and clearancing.

However, I'd like to know the tricks.

What's this about coming in at a steep angle? You'd want to air down the tire touching the ramp and the opposite rear?

BLACKDOG · February 27, 2009, 03:11:17 PM

Quote from: germ on February 19, 2009, 09:44:22 PM
I personally think the RTI is a useless measurement, since there is no standard, and there are several ways to manipulate the data. It's too variable to have any meaning. If the results cannot be repeated and verified, it's basically a useless measurement. The only virtue I can see in it is to help figure out what your tipping point would be, to help avoid a flop. But of course that is just my opinion. I've never done one, and might do it if I got the chance just for fun.

Erik

well said!

$I\'m Down$ wish I coulda done one with the IFS.

I flexed it out on rocks plenty of times though, so oh well.

Hammerhead · March 01, 2009, 04:32:18 PM

An RTI ramp is a tool for testing suspensions and finding out what is binding. It will NOT tell you how well a rig will do on the trail or in the rocks.

That being said:

My Cruiser scored and even 1000 on a 30° ramp a few years ago...

Jordan7118 · March 01, 2009, 05:06:09 PM

Quote from: hammerhead on March 01, 2009, 04:32:18 PM
An RTI ramp is a tool for testing suspensions and finding out what is binding. It will NOT tell you how well a rig will do on the trail or in the rocks.

That being said:

My Cruiser scored and even 1000 on a 30° ramp a few years ago...

You have any pics or specs for us??? I'd like to see!!!

Hammerhead · March 01, 2009, 08:26:21 PM

It was a '74 FJ40 with SBC, SM465, FJ62 axles, SOA, shackle reversal, spring flip, long travel shocks, custom overlength spring packs, 2" wheelspacers, 38.5s and a ton of sawzall trimmin'.....

With my wheelbase that translates to almost 48" off the ground.

As mentioned earlier in this thread there are tricks to pushing your score on a ramp. I let the air WAY down to achieve this score as well as lubing my leaf springs and removing my shocks. Yep I know it is like cheating but there is no rule book.

News:

Official RTI score thread!!