RTI ramp scores

:read: You lost me on the 113 number but looking at your graphics I realized that I wasn't allowing for the little bit of height difference in the "red" line between the tire and the ramp (since the tire isn't touching the ramp at that point.

But I thought the 9.5" had to be subtracted from the distance traveled up the ramp to bring.

Quote from "Slimer"

:read: You lost me on the 113 number but looking at your graphics I realized that I wasn't allowing for the little bit of height difference in the "red" line between the tire and the ramp (since the tire isn't touching the ramp at that point.

But I thought the 9.5" had to be subtracted from the distance traveled up the ramp to bring.

You're too concerned with the height of the tire...it's not the height of the tire that you're scored on, it's the distance traveled up the ramp. I was simply showing the calculation for the difference in score between measuring perpendicular to the ramp vs. measuring perpendicular to the ground. In the case of a 33" tire on a 30 degree ramp that difference in score would be 113...so if you scored a 642 measured perp. to the ground then you'd add 113 to your score to get what your score would be if measured perp to the ramp.

--Ian (hasn't found anywhere offroad that a higher RTI score makes a bit of difference anyway....lockers rule.)

I kind of agree with what Simon and Quadna said. Shouldn't it be more about the height of the tire than the amount it traveled up some ramp?

It just makes sense to put the angle of the ramp into consideration so that the score is tranferrable to other ramps that might be at a different angle. Otherwise I could travel REALLY far up a 20º ramp and maybe even get a score over 1000.

I agree with you that it isn't THAT big of a deal when it comes down to it but it would be nice to know the correct way of scoring on our ramp.

Quote from "Slimer"

I kind of agree with what Simon and Quadna said. Shouldn't it be more about the height of the tire than the amount it traveled up some ramp?

It just makes sense to put the angle of the ramp into consideration so that the score is tranferrable to other ramps that might be at a different angle. Otherwise I could travel REALLY far up a 20º ramp and maybe even get a score over 1000.

It is about the height of the tire...indirectly. That's why it started w/ 20 degree ramps and gradually moved to 23 and then 30...50 inches up a 30 degree ramp is a hell of alot higher than 50 inches up a 20 degree. I agree that it'd be nice to have a scoring system independant of the angle but traditionally it is only (distance-traveled-up-ramp/wheelbase)*1000 regardless of the ramp's angle.

--Ian

That's always the problem....lack of standardization.

On one hand you want an accurate measurement but on the other hand you want it to be relative to what everyone else is doing (even if I still think they are wrong ).

Thanks Tony,

My score went from a 288 to a 394 after I put the lift on.

Cool

Quote from "Da Mutt"

if it makes you all feel any better all other measurements that were done by me and the way we diod it at pa jeeps last year is the red line in quadnas piture....... it is supposed to be the bottom of the tire as measured from the ground.

lets say you didnt have a rti ramp score you can use a forklift and then you measuer formt he ground to the bottom of the tire same thing with the ramp as far as what the difference is bettween a 20 and 30 deg ramp there was a calculator posted int he first rti ramp score thread

here is the link to the conversion calculator again

http://www.tmcom.com/~tsm1/scout/faq/rti.htm

and here is a link to the old scores

http://www.delawareja.com/modu…highlight=rti+ramp+scores

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That doesn't calculate the RTI score though, just the height of the tire.

as long as you measure all vechicles the same on any given ramp shouldnt that even things out

I did see that but you have to guess what your score for the 30º ramp is first. If you calculate it the conventional way of using the distance traveled you'll get wrong answers, theorectically (if you are truly mimmicking having your tire on a rock.

But it seems to be what everybody else does so....what ever.

For those of us who don't get to go off roading as much (or at all ) it's just fun driving up the ramp. Driving up on curbs gets old.

all I know is I beat orange crush's stock jeep he had at kahunaville with my stock Grand wagonner.. I scored a 320, I think if I remembered right.

all I know is my aproach angle is 32degree's we figured this out because of the ramp

Yeah, I think the paint is still missing from where the waggy hit it!

I should have grabbed Kathy's Grand Cherokee and ramped it since it was at the "Fling" as well.