What's the actual Mileage? - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old April 7th, 2005, 10:26 AM
1of40's Avatar
1of40
Status: Offline
1of40
NAS 97SW & 83 One Ten Tdi
Member
 
Join Date: Dec 2003
Location: Potomac Falls & Wintergreen, Virginia
Posts: 6,076
Registry
What's the actual Mileage?

If you're running 285's and a 4.11 gear ration; anyone have a conversion formula for determining actual mileage I'm putting on the vehicle?
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old April 7th, 2005, 11:48 AM
Campbell's Avatar
Campbell
Status: Offline
Rich Campbell
06 LR3 01DII D90s sold
Member
 
Join Date: Oct 2003
Location: PA
Posts: 1,512
Registry
I run 285's and would be interested in knowing this as well.
This is what I have heard..

Larger tires will increase you top speed(increasing milage) but it will decrease your bottom end power.
Reply With Quote
  #3  
Old April 7th, 2005, 12:26 PM
Mike Hippert's Avatar
Mike Hippert
Status: Offline
D-90Slut/Stalker,SNLPres
94 D-90 Grinding Rover
Member
 
Join Date: Sep 2003
Location: Manchester NH USA
Posts: 4,789
I made a calculator in excel, tell me what ya think?
Edit: Type over the white sections too put in what ever size tire you have.
Edit 2: changed some backwards calculations
Edit 3: ok another fix in calcs

Follow-up Post:

OK I was thinking f adding a few things, like what your RPMs will be at, a T-case area that you can change the high range and low range ratios, anyone think of anything else?
Attached Files
File Type: zip tire's and gears.zip (3.3 KB, 96 views)
__________________
Don't forget to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
first then ask questions later! The loose nut behind the wheel
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old April 7th, 2005, 01:08 PM
JimC's Avatar
JimC
Status: Offline
Jim Cheney
NAS 110 #145
Site Team
 
Join Date: Sep 2003
Location: Stuttgart, Germany
Posts: 7,154
Registry
axle ratios?
Reply With Quote
  #5  
Old April 7th, 2005, 01:16 PM
Trigger's Avatar
Trigger
Status: Offline
Tony Fannin
'94 D-90 #491
Member
 
Join Date: Oct 2003
Location: Austin, TX
Posts: 444
When I went to 285s my speedo started reading correctly according to my GPS. I figure my truck actually has less miles on it than the odometer says as it ran 265s for its first 100,000 miles.
__________________
A Land Rover would never turn up to collect an Oscar, it'd be far too busy doing something important somewhere for someone - Top Gear
Reply With Quote
  #6  
Old April 7th, 2005, 01:25 PM
Mike Hippert's Avatar
Mike Hippert
Status: Offline
D-90Slut/Stalker,SNLPres
94 D-90 Grinding Rover
Member
 
Join Date: Sep 2003
Location: Manchester NH USA
Posts: 4,789
Quote:
Originally Posted by JimC
axle ratios?
On there already.
Quote:
Originally Posted by Dillo90
When I went to 285s my speedo started reading correctly according to my GPS. I figure my truck actually has less miles on it than the odometer says as it ran 265s for its first 100,000 miles.
What GPS, I have found that most GPS's don't read very acuretly, I always use the Radar traps on the side of the road to check the speed.
__________________
Don't forget to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
first then ask questions later! The loose nut behind the wheel
Reply With Quote
  #7  
Old April 7th, 2005, 02:48 PM
Ntajeep
Status: Offline
Matthew Bremner
1997 AA Yellow D90
Member
 
Join Date: Dec 2003
Location: Indianapolis
Posts: 47
I had a very similar situation. Since switching from the stock A/T's on my '97 to 285/75/16 SSR's = 33.9' according to Interco's website, I have had a more accurate read from my speedo compared to both a GPS and a speed trap device.

-Matt
Reply With Quote
  #8  
Old April 7th, 2005, 06:06 PM
scoloco's Avatar
scoloco
Status: Offline
Scott
'94 D90 ST
Member
 
Join Date: Jan 2004
Location: Manchester NH
Posts: 372
Same here. Upping to 285s from 265s seems to have fixed the speedo. With the 265s I had people complaining over the CB that I was driving too slow (speedo was reading ~5mph slow at 70). Now that I've changed my gears, I expect it will be back to reading fast. Changing 3.55->4.11 is about 2% change (I think) and I think that is just less than the tire size change.
Reply With Quote
  #9  
Old April 7th, 2005, 06:25 PM
Mike Hippert's Avatar
Mike Hippert
Status: Offline
D-90Slut/Stalker,SNLPres
94 D-90 Grinding Rover
Member
 
Join Date: Sep 2003
Location: Manchester NH USA
Posts: 4,789
OK I added T-case gearing, trans gearing and a RPM section.

Tell me what ya think, is it too hard to understand?
Attached Files
File Type: zip tire's and gears.zip (5.9 KB, 163 views)
__________________
Don't forget to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
first then ask questions later! The loose nut behind the wheel
Reply With Quote
  #10  
Old April 8th, 2005, 09:06 AM
scoloco's Avatar
scoloco
Status: Offline
Scott
'94 D90 ST
Member
 
Join Date: Jan 2004
Location: Manchester NH
Posts: 372
OMG - thats one helluva colour scheme! Once I figured out how to use it, interesting. I guess the gear change is more drastic than I thought it would be.
Note you cant have both metric and non-metric tire size filled out at the same time.
Reply With Quote
  #11  
Old April 8th, 2005, 02:40 PM
Trigger's Avatar
Trigger
Status: Offline
Tony Fannin
'94 D-90 #491
Member
 
Join Date: Oct 2003
Location: Austin, TX
Posts: 444
Quote:
Originally Posted by Mike Hippert

What GPS, I have found that most GPS's don't read very acuretly, I always use the Radar traps on the side of the road to check the speed.
I'm using a handheld Magellan. It's very accurate in my tests. I've tested it against speed traps too. It got me out of a ticket a couple years ago. Cop claimed I was doing 85 in a 60. I dl'ed my logs and brought them court. The were admitted by the DA and showed that I was only doing 66. They let me off with court costs.
__________________
A Land Rover would never turn up to collect an Oscar, it'd be far too busy doing something important somewhere for someone - Top Gear
Reply With Quote
  #12  
Old April 11th, 2005, 04:25 PM
Mike Hippert's Avatar
Mike Hippert
Status: Offline
D-90Slut/Stalker,SNLPres
94 D-90 Grinding Rover
Member
 
Join Date: Sep 2003
Location: Manchester NH USA
Posts: 4,789
Quote:
Originally Posted by scoloco
OMG - thats one helluva colour scheme! Once I figured out how to use it, interesting. I guess the gear change is more drastic than I thought it would be.
Note you cant have both metric and non-metric tire size filled out at the same time.
Yes you cannot have oth metric and non-metric tires for both old or both new at the same time, but you should be able to have an old metric and a new non metric or vise versa. I also know I need to work on the colors, I'm not an interior decorator


Quote:
Originally Posted by Dillo90
I'm using a handheld Magellan. It's very accurate in my tests. I've tested it against speed traps too. It got me out of a ticket a couple years ago. Cop claimed I was doing 85 in a 60. I dl'ed my logs and brought them court. The were admitted by the DA and showed that I was only doing 66. They let me off with court costs.
Hmm, ok, I have used a few and they always seemed to be off.
__________________
Don't forget to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
first then ask questions later! The loose nut behind the wheel
Reply With Quote
  #13  
Old April 12th, 2005, 08:24 AM
scoloco's Avatar
scoloco
Status: Offline
Scott
'94 D90 ST
Member
 
Join Date: Jan 2004
Location: Manchester NH
Posts: 372
Quote:
Originally Posted by Mike Hippert
Hmm, ok, I have used a few and they always seemed to be off.
So how do you know they are off? I never trust my speedo. I dont think the speedos in my cars have been accurate at all (well, cars since I sold my chevy).
Reply With Quote
  #14  
Old April 12th, 2005, 08:29 AM
Mike Hippert's Avatar
Mike Hippert
Status: Offline
D-90Slut/Stalker,SNLPres
94 D-90 Grinding Rover
Member
 
Join Date: Sep 2003
Location: Manchester NH USA
Posts: 4,789
I have compaired them to people with new cars, and to rader signs on the side of the road, and GPS to GPS.
__________________
Don't forget to
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
first then ask questions later! The loose nut behind the wheel
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
ac

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Odometer reads 76% actual miles stevewhitaker Defender Technical Discussions 4 January 21st, 2006 06:07 PM
Gas Mileage mdmccallum Defender Technical Discussions 2 October 6th, 2004 12:14 AM
Actual Tire size? revor Defender Technical Discussions 8 July 8th, 2004 10:10 AM
Mileage Question boshea Misc. Chit-Chat 4 April 6th, 2004 03:22 PM
Can anybody do a Vin Check for me? Quimbola Misc. Chit-Chat 7 February 18th, 2004 06:24 PM


All times are GMT -5. The time now is 12:55 AM.


Copyright