Submitted: Thursday, Dec 18, 2014 at 22:19
ThreadID: 110458 Views:5630 Replies:2 FollowUps:2
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Son just brought a 3lt Diesel Hilux 1997 I think he tells me that sitting on 100kph it's revving at 3000 is this the norm.
If so is there another ratio for the diffs say a 4.7 to 1 I'm not sure what ratio is in yet have not checked.Possible 4.5
Anybody got any clues please cheers
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Reply By: gbc - Friday, Dec 19, 2014 at 11:07

Friday, Dec 19, 2014 at 11:07
1kz was 4.556:1

The petrol 3rz was 4.3:1

Yes, they were a high revver for 100 kph but you get used to it. Toyotas never love being geared up.
Try bigger tyres first, that will give you an idea of what you stand to lose in economy and performance by changing ratios around.

AnswerID: 543142

Follow Up By: Member - reggy 2 (VIC) - Friday, Dec 19, 2014 at 16:23

Friday, Dec 19, 2014 at 16:23
Sorry but you most likely realized I had the ratio's back to front as per reply.
AS you cannot edit I will correct another issue .
The vehicle has larger tyres and rev range is 105kph doing 3000 revs
FollowupID: 830045

Reply By: Green Rv - Saturday, Dec 20, 2014 at 09:29

Saturday, Dec 20, 2014 at 09:29
Hi Reggy
i have the ln167 5le (3ltr) engine
standard diff in mine is 4.5/1 and sits on about 2950 rpm @100kph with 245/70-16 all terrain tyres on so yes this sounds normal.

due to a diff issue i had the diff centre replaced and the dumb azz mechanic put 4.1/1 centre in by mistake this only brought the rpm down a little say 250 rpm

with the 4.1/1 ratio diff in the hilux was a lot harder to get off the line. so it used more fuel around town than highway and the opposite effect with the 4.5/1.

so in the end there was near zero effect on fuel economy with the two types of diff ratios

if you can get some larger tyres on to get you under that 3000 rpm range thats where you will find a bit better fuel economy.

as a guide i'm getting 500 to 550 k a tank i have the duel cab which i think has a 65ltr tank on it (std) i've been told before that single cabs have a slightly larger tank i think 75ltr

hope this info helps you
AnswerID: 543181

Follow Up By: Green Rv - Saturday, Dec 20, 2014 at 09:57

Saturday, Dec 20, 2014 at 09:57
just a side note i don't have a turbo on
also that it get almost the same fuel economy on the beach as it does on road
noted the same towing 750kg on road. off road noticed a big difference as i find myself up to 4500 rpm to get the trailer through the soft stuff

as long as you stay under that 3000 rpm the fuel economy is pretty consistent

FollowupID: 830074

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