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# Thread: MUTT SUV Project - Stage 1 Complete

1. ## 6.5 Inches High Travel Lift

Stage 3: Frame modifications

Stage 2 suspension complete: IFS + IRS e-Diff Locks, 1.5' Lift, 35" Tires

Stage 1: 5 speed hi-low 4x4 Drive Train, 2.3 TD with Intercooler Engine

2. @shellcrack

MUTT and H1 dimensions are completely different. If you want to build a replica then LC 100 or Defender 110 are better doner chassis. Call me on my cell in the evening, will guide 03008492791

3. @ all
there's a bug in pw server,picture links will start working as soon as the bug is fixed

4. ## some more design ideas

5. ^^ this is really INSANe

6. and good luck with ur project as well

7. Originally Posted by wasifali89
and good luck with ur project as well
Thanks.

8. ## Engine to Wheel Speed Calculator

Following is a wheel speed calculator for any car. Hope it is helpful.

_____________________________________________
5th Gear Ratio x Differential Ratio = Final Drive Ratio
Engine RPM / Final Drive Ratio = Wheel RPM
Wheel RPM x Tire Diameter (meters) x 3.142 x 60 / 1000 = Wheel Speed in Km/h

hints: 1 inch = 0.0254 meters
differential teeths 39 / 8 = 4.875 Differential Ratio
____________________________________________

example:

0.85 x 4.875 = 4.144 Final Drive Ratio
2500 / 4.144 = 603.282 Wheel RPM
603.282 x 31 inches x 0.0254 x 3.142 x 60 / 1000 = 89.55 Km/h

Where for the tire size of 31 inches, at 2500 Engine RPM, and at 5th Gear my vehicle's top speed shold be 89.55 km/h.

Please keep in mind to factor in vehicle's drag, rolling resistence, shaft, and axle losses which can range from 10 to 30%

9. Originally Posted by aisheikh
Following is a wheel speed calculator for any car. Hope it is helpful.

_____________________________________________
5th Gear Ratio x Differential Ratio = Final Drive Ratio
Engine RPM / Final Drive Ratio = Wheel RPM
Wheel RPM x Tire Diameter (meters) x 3.142 x 60 / 1000 = Wheel Speed in Km/h

hints: 1 inch = 0.0254 meters
differential teeths 39 / 8 = 4.875 Differential Ratio
____________________________________________

example:

0.85 x 4.875 = 4.144 Final Drive Ratio
2500 / 4.144 = 603.282 Wheel RPM
603.282 x 31 inches x 0.0254 x 3.142 x 60 / 1000 = 89.55 Km/h

Where for the tire size of 31 inches, at 2500 Engine RPM, and at 5th Gear my vehicle's top speed shold be 89.55 km/h.

Please keep in mind to factor in vehicle's drag, rolling resistence, shaft, and axle losses which can range from 10 to 30%
Good info ..... but I know that you are an engineer and thus all of it is easy for you to understand, but what's all that in lay man's lingo

To start off, how does one know the 5th gear/4th gear ratio ? and
what is: x 3.142 x 60 / 1000 = Wheel Speed in Km/h

Good info ..... but I know that you are an engineer and thus all of it is easy for you to understand, but what's all that in lay man's lingo

To start off, how does one know the 5th gear/4th gear ratio ? and
what is: x 3.142 x 60 / 1000 = Wheel Speed in Km/h

3.142 = pi
60 = conversion from minutes to hours
1000 = conversion from meters to kilometers

1 rotation of tire is the distance traveled in 1 revolution. To calculate the distance of 1 rotation you need to know the circumfrence of the tire, which is "Diameter x pi". So a 30 inch tire would have a circumfrence of 30 x 0.0254 x 3.142 = 2.394 meters

So in 1 wheel rotation the tire crosses a distance of 2.394 meters.

so if you mutiply 2.394 x Wheel RPM = you get wheel speed in meters / minutes

hence we need the 60/1000 conversion for kilometers / hour

I assume you are trying to find out your gear ratio on the MUTT, here they are
1 gear 5.712:1
2 gear 3.179:1
3 gear 1.674:1
4 gear 1.0:1
reverse 7.497:1

MUTT's differential ratio is 4.86:1
4x4 Transmission ratio is 1:1

For other vehicles just google the model / type of gearbox / diffs and you will get the ratio details. Typically all 4th Gears have a ratio of 1:1

11. @aisheikh
Pictures fixed
How did i miss this thread

12. Originally Posted by Libra
@aisheikh
Pictures fixed
How did i miss this thread
Thanks for the fix. Now you can follow it, and give your suggestions towards the project

13. Arsalan buhat buhat mubarak ho.... she got some looks now.... put MTs and hit mud rally

14. ## 1st Mud Bashing at Jeep Track

15. Originally Posted by DeeDee
Arsalan buhat buhat mubarak ho.... she got some looks now.... put MTs and hit mud rally
Thanks DeeDee. I am looking for 265 / 75 / R17 MT or AT. Would love to put it in, but need proper tires.

16. ## Fellow 4x4s

17. Need help in finding out any army surplus supplier. Looking for some accessories for my jeep.

18. ## Finally found the buckets!!!!

Original Recaro buckets. Got them from Karachi Shersha.

20. ## Dash Meter

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