Canter single wheel conversion

I own a 2007 canter 4x4, with standard duals i was getting 750kms at 90 kms per hr at 3000rpm on 120 litres. Changed the wheels to super singles and now getting 450kms at 2700rpms at 100kph. any advice on how to fix the problem. Thanks Len
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Reply By: Rob J8 - Saturday, Mar 07, 2015 at 21:20

Saturday, Mar 07, 2015 at 21:20
Len, sounds like the diameter of the singles is quite a bit bigger than the duals.
what size were the duals and what size are the singles. Rob J
AnswerID: 549575

Reply By: wholehog- Saturday, Mar 07, 2015 at 21:22

Saturday, Mar 07, 2015 at 21:22
Dont use overdrive...5th gear..you seem to have already changed the gearing with a larger rolling diamtre tyre.

Use of an EGT guage would be showing you a hotter fuel burn in 5th now..as also evidenced in the reduced distance on 120 litres. Did you also apply a correction to the distance travelled with the larger diametre tyres..?
AnswerID: 549576

Reply By: pop2jocem - Saturday, Mar 07, 2015 at 21:24

Saturday, Mar 07, 2015 at 21:24
Did you change the fronts for super singles as well or just the rear duals?

AnswerID: 549577

Reply By: Peter_n_Margaret - Saturday, Mar 07, 2015 at 22:25

Saturday, Mar 07, 2015 at 22:25
Probably an imaginary problem caused by an odometer not recording distance accurately.
Fix the odometer.

Cheers,
Peter
OKA196 Motorhome
AnswerID: 549579

Follow Up By: len0013 - Sunday, Mar 08, 2015 at 11:13

Sunday, Mar 08, 2015 at 11:13
Thanks GPS was showing same distance. Len
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FollowupID: 835003

Reply By: Alloy c/t - Sunday, Mar 08, 2015 at 11:07

Sunday, Mar 08, 2015 at 11:07
Google up a 'tire comparison chart' , your old size tire compared to the new size will give you how much your odometer is out and how much your speedo is now out ,,,, recently changed from standard size 265/70/17 to 285/70/17 which put the Toyota speedometer 100% accurate for speed [ factory tires =96km by gps while speedo reads 100 .. Now 100 gps = 100 on speedometer] …. but the Odometer is 4% per 100 km out of whack .IE a known distance of 100 km driveway to driveway now only reads as 96 km on the odometer...
AnswerID: 549596

Follow Up By: Member - John - Sunday, Mar 08, 2015 at 15:51

Sunday, Mar 08, 2015 at 15:51
Alloy, tyre comparision details are on this site under "Articles".
John and Jan

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FollowupID: 835014

Reply By: gbc - Sunday, Mar 08, 2015 at 15:42

Sunday, Mar 08, 2015 at 15:42
You must have gone to something like a 40 inch tyre? As stated before, you might be better off trying the same run but not using top gear to get the revs similar to before. Big rubber like that is definitely going to cost fuel though. I'll bet you aren't running 85 odd psi any more either?
AnswerID: 549616

Follow Up By: Peter_n_Margaret - Sunday, Mar 08, 2015 at 19:12

Sunday, Mar 08, 2015 at 19:12
The most common tyre used for singles on Canters would be a 285/70R19.5. That is about 36".

I run a slightly larger 305/70R19.5 (36.5") on the OKA and happily cruise at 90 in OD 5th at 2200RPM.The Canter would have more power than the OKA, for sure.

Mine are good for 3,075kg per tyre (at 115psi), so there are no load issues and rolling resistance is low. I run them at 45/65psi on the black top.


Cheers,
Peter
OKA196 Motorhome
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FollowupID: 835021

Follow Up By: gbc - Monday, Mar 09, 2015 at 08:39

Monday, Mar 09, 2015 at 08:39
Our Canter 3.5 2wd runs 30 inch tyres standard and revs its proverbials off to hit the tonne towing the bobcat. It is very good on fuel however. I'm assuming the diff ratios are somewhat similar?
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FollowupID: 835051

Reply By: TomH - Sunday, Mar 08, 2015 at 16:15

Sunday, Mar 08, 2015 at 16:15
More importantly you now have 2 tyres taking the weight of the 4 previous ones.

What is the maximum loading on the new ones and are they legal.

The engine is probably lugging in top gear and overfueling which will cause your increase in consumption
AnswerID: 549618

Reply By: duck - Sunday, Mar 08, 2015 at 19:15

Sunday, Mar 08, 2015 at 19:15
Len
I have a 2014 isuzu nps with warrior single conversion & I'm thinking going back to a smaller wheel to get the gearing back as it's fine out west with the big wheels but most of the time on on coast with hills but I would not have duals no matter what
AnswerID: 549633

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