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What diff ratio for a Tourer Mav

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

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What ratio for 35s on a tourer Mav


4.6
3
30%
4.3
4
40%
4.1
3
30%
 
Total votes: 10

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What diff ratio for a Tourer Mav

Post by MKPatrolGuy »

My Mav is a Turbo Deisel Manual. Currently has 4.1 diffs and 29" tyres.

I'm going to be fitting 35s to it, so what ratio would be better, 4.3 or 4.6 or leave it at 4.1

It currently does 2400rpm and 100kmh and 2800 at 120kmh :shock:

Bear in mind this is a daily driver and tourer. I have the Patrol for the weekend fun stuff.

Thanks
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Post by MQ080 »

more importantly what's going to happen to the MK?????
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Post by MQ080 »

Just read the whole post :oops:

I vote 4.3's, if you have the turbo there's plenty of power there and you will want the better range for long trips
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Post by MKPatrolGuy »

MQ080 wrote:Just read the whole post :oops:

I vote 4.3's, if you have the turbo there's plenty of power there and you will want the better range for long trips


That is what i have been thinking, That means I'll use the 4.6s I have here for the new diffs going under the MK.
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Post by MQ080 »

My SD33 had the 4.625's std... what was in yours?
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Post by Daisy »

My GQ had 4.6's and 35's on a turbo diesel..

110 kph at 2400 rpm ish.

4.3s would give you prolly 2200/2300 which is pretty much a good cruising speed.

TOM
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Re: What diff ratio for a Tourer Mav

Post by bogged »

Do nothing until you fit the 35's and see how good/bad it is...

Then go from there. The tires will probably change the RPM by about nearly ~900-1000rpm as they stand. workin on its usually 300rpm per ratio change on a diesel...


~~~~~
4.1 - 29
4.3 - 31
4.6 - 33
4.88 - 35
:D
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Post by morkz »

i reckon go the 4.6

mine does 2400 rpm at 100kmh

but i found that the higher revs i.e. 2400 it makes it better to overtake as well which i feel is much better.

also i find that i'am getting better economy as well on mine now that i have the 4.6.
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Post by ludacris »

I run 35's and have 3.9's and it runs fine.there is nothing that my gearing wont get me up. No stalling and so on. It is not for rock crawling so having a good long gear helps me get up anything in my way. It is a petrol 4.2 so you should not have any problems with your 4.1's.


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Re: What diff ratio for a Tourer Mav

Post by MKPatrolGuy »

bogged wrote:Do nothing until you fit the 35's and see how good/bad it is...

Then go from there. The tires will probably change the RPM by about nearly ~900-1000rpm as they stand. workin on its usually 300rpm per ratio change on a diesel...


~~~~~
4.1 - 29
4.3 - 31
4.6 - 33
4.88 - 35
:D


Yeah I will be trying it out with the 4.1s and 35s first and go from there. Just wanted some opinions. :D
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Post by muddyperils »

On my thread about Ideal touring tyre/ lift sizes "QUICK60" stated his diesel cruiser on 35's with turbo runs 4.1's and gets good fuel ecconomy when touring and he is a further 8% overdriven with the transfer gears, so I am going to wait as well till I fit the 35's and go for a long drive to make me mind up, but I voted 4.1 :P
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Post by Grungle »

Hi

I have done up (modifed a yank chart) a rpm table to work out ideal rpm for given situations. Change the items in blue to what you have/want. I found out what the standard runs and tried different combos until I got close.

Link is http://members.optusnet.com.au/~grungle ... mtable.xls

Regards
David
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Post by MKPatrolGuy »

Grungle wrote:Hi

I have done up (modifed a yank chart) a rpm table to work out ideal rpm for given situations. Change the items in blue to what you have/want. I found out what the standard runs and tried different combos until I got close.

Link is http://members.optusnet.com.au/~grungle ... mtable.xls

Regards
David


Thanks for that :D 3 each in the poll, you guys trying to make it hard for me to decide? :D :?
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Post by bogged »

MKPatrolGuy wrote:Thanks for that :D 3 each in the poll, you guys trying to make it hard for me to decide? :D :?



It couldnt be easier.
Drive it first, see if you need change.
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Post by bazzle »

Turbo diesel , 35's 4.375s 2250rpm @100kph (manual)
Non turbo Diesel 35's, 4.625s 2400@100kph (manual)

Bazzle
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Post by MKPatrolGuy »

bazzle wrote:Turbo diesel , 35's 4.375s 2250rpm @100kph (manual)
Non turbo Diesel 35's, 4.625s 2400@100kph (manual)

Bazzle


Baz, You have 4.3s and 35s don't you? Are you happy with that setup?
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