Outer Limits 4x4 Board

84 Toyota 4-skinner with 33`s

11-13 km/h at 100kms

5-7 km/h at 60 kms

wondered why everyone was driving so slow

me thinks that this is affecting my oddometer to as I`m not getting the same kilometers per tank?????

Who else has checked there`s ?????

Daas

88 Zook with 34's


Way out, maybe 20 ks at a guess.

I've never hit 100 in it

mine with the 32's, about 10km's i reckon

since putting a 60 series box in (i think the speedo senders are different)

says 100km/h = actual ~110km/h with 33s

yes, your odometer should be 11% to 13% out.

never really thought about that tho. now i get 10% better fuel economy

cant wait to see how far out it will be with my new tyres.

12% - Mav, 4.1's, 33's

my speedo has never worked since i got my rangie.

With the original setup i got it to 90Ks with my foot flat to the floor on the way to Airlie Beach but with the current setup I havnt had it over 60 on the highway but I would be doin about 100-120 but thats just guessing

never really thought about that tho. now i get 10% better fuel economy

Mine is actually worse was 350km per 50 litres now is about 280km per 50 litres

I`m confused now

80 series diesel with 305 muddies is fark all out, but with 34 inch Simex we go to about 10%.
Not much realy.

With the Ferwoaza going from 235's to 31" tyres I'm 5k's out at 60kph and 10k's out at 100kph, so when the speedo read's 90k's I'm doing 100..

Basically mines 10% out...and I've just memorised what speeds I need to do, 55 speedo in a 60 zone, 63 speedo in a 70 zone, 72 speedo in an 80 zone, 81 speedo in a 90 zone, 90 speedo in a 100 zone, and 100 speedo in a 110 zone...all good, never been booked

DAAS KAPITAL wrote:

never really thought about that tho. now i get 10% better fuel economy

Mine is actually worse was 350km per 50 litres now is about 280km per 50 litres

I`m confused now

i meant before i thought i got 5kms/L but that was worked out with an incorrect speedo. i actually travel more kms than my odometer tells me.

i believe this is the same for your case.

you should be getting 350kms/50L still, but your odometer travels 13% less. so id say you should be around the 305km/50L with your new speedo. (there are other variables which make your fuel economy crap, requires more torque to turn the bigger rubber etc.)

If your vehicle was originally fitted with 30" tyres and is now fitted with 33" tyres your speedometer will read 10% slower that the actual road speed and if your vehicle is now fitted with 35" tyres instead of the original 30" tyres then you speedometer will be reading approximately 16.5% slower.

This is according to marks 4wd adapters

DAAS KAPITAL wrote:

never really thought about that tho. now i get 10% better fuel economy

Mine is actually worse was 350km per 50 litres now is about 280km per 50 litres

I`m confused now

You do realise that to push larger diameter tyres it will use more fuel than it did with the stock tyres?

Mine was WAY OUT when I put the 35's on, and (taking into account extra extra distance travelled over indicated) fuel economy was 11.8 L per 100km. This figure was over several tanks.

When I put in the 4.6's, my gearing (and speedo), theoretically returned to standard but my fuel economy went to 13.8 L per 100km. I assume this is due to more actual revs per 100km's when changed from 4.11's to 4.625's.

My MK is accurate with the 35 muds on, but out about 5kph at 60 with the Q78s

my 45 is 10k's slower than the speedo reads at 110km (road speed 100, speedo says 110) about 5 k's under at 60.

the 40's speedo is about 50 meters out of the 40, sitting on the shed floor

my maverick was out in the other direction. had 37's and needed 38.5 to bring it back to being correct.

my lux is 10% out need to run 35s to correct the gearing

speedo is spot on
odometer is 8% out with 235/75/16s

1990 zook on 31' simex muds speedo reads 81 k's when i'm actually doing 100 k's

RaginRover wrote:speedo is spot on
odometer is 8% out with 235/75/16s

if your odometer is out cause if bigger tyres wont your speedo be aswell ?

spot on


and tested regulary by the local law enforcement officers, and handy speed cameras....

mind you it was out a long way before I fitted the 35's...118 was actually 100 !

spazbot wrote:

RaginRover wrote:speedo is spot on
odometer is 8% out with 235/75/16s

if your odometer is out cause if bigger tyres wont your speedo be aswell ?

Strangely enough no, it is out with standard tyres on it - gps checkec as well as checked with other cars following but with the MTRs on it is spot on with my gps and other cars

Tom

When the 31s were new the Paj was within 1% compared with a GPS, running at 100km/h on the highway. I'm guessing it won't be so good once the 33s go on.

About 30km at 90 im doing about 118

87 sierra with 31's, is now 15% out. so at a 100km/h on the speedo i'm doing 115km/h.

One is way out,say it reads 105-110km,I'm doing about 80-85km.
Don't know with other one,cable snapped when it hit 100km a few weeks back,must be a zuk thing,fixing it soon.

Mandy

My hilux is basicly spot on with 33`s, when going past any speed check signs (the digital ones) it is allways within 1km/hr of what my speedo says.

Standard it came with 4.3 diffs (I think, memory is up the shit ATM) and I now run 4.8`s.

no havent checked but just go with the flow works for me except up hills then i get left behind

RUFF wrote:

DAAS KAPITAL wrote:

never really thought about that tho. now i get 10% better fuel economy

Mine is actually worse was 350km per 50 litres now is about 280km per 50 litres

I`m confused now

You do realise that to push larger diameter tyres it will use more fuel than it did with the stock tyres?

yeah I was confused by 383fj45 getting 10% better
(but i didn`t mention the fact that I have a dirty stinking crack in my extractors & since I haven`t taken a fuel/km reading since the tyre swap I don`t know its effect either)

mine reads bout 104 when i am doin 100 pretty good i reckon
zuk 6.1, 4.88 diffs, 33's