3 litre Patrol

Submitted: Friday, Jan 07, 2005 at 19:52
ThreadID: 19157 Views:2577 Replies:5 FollowUps:4
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I've been reading a number of posts on EO about the torque of the 4.2 Patrol
and how it craps on the 3 litre. I know the 3 litre delivers 354nm@ 2000rpm
and the 4.2 360nm@2000. To me torque is torque and 6nm is not mind blowing.
Am I missing something?

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Reply By: Goona - Friday, Jan 07, 2005 at 19:58

Friday, Jan 07, 2005 at 19:58
Rob,

The torque delivery of the 4.2 is alot lower in the rev range and more usable off road. I have the old 4.2 non intercooled and my mate has the 3lt and mine is all over his low down in the scrub just idles where he has to rev and travel faster do overcome the same obsticles.

Regards
AnswerID: 91836

Reply By: Member - Jeff M (WA) - Friday, Jan 07, 2005 at 20:13

Friday, Jan 07, 2005 at 20:13
Yes these "maximum" specs that people LOVE to quote on here and in general really don't mean alot.
Some motors are very peaky and will generate high kw or torque for a short period of time whereas a competing engine may have a lower "maximum" but be able to sustain it for longer throughout the rev range.
These new DID motors are very good and they do generate vast amounts of torque and power but the bigger motor is going to generate similar amounts of power in a more steady way.

You look at the little petrol motors that generate the same "maximum" KW as my Turbo Diesel or more Kw than mine, and yet for some strange reason I'm idling over obsitcals and these guys are taking run ups.
AnswerID: 91837

Follow Up By: Johnno1 - Saturday, Jan 08, 2005 at 19:13

Saturday, Jan 08, 2005 at 19:13
you need to look at torque delivery on a graph vs rpm to fully understand why this is so.
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Reply By: Member - Captain (WA) - Friday, Jan 07, 2005 at 20:51

Friday, Jan 07, 2005 at 20:51
Hi Rob

I have the 3.0TD with the Dtronic so it now has 420Nm of torque @ 2,000rpm. But at idle revs my old 1HZ non-turbo 80 series has HEAPS more torque even though it has significantly less max torque (274Nm max @ ~2200rpm).

But once the 3.0TD is at ~1100 rpm it has more torque than the 1HZ and as revs increase the difference becomes huge. It takes a few revs for the turbo to spool up so at idle the 3.0TD is effectively a low compression (17:1) "non turbo" 3 litre compared to the 4.2 high compression (22:1) diesel. At these revs there is no substitute for capacity!

Cheers

Captain
Its not what you drive, but how you drive it!
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AnswerID: 91841

Follow Up By: muzzimbidgie - Friday, Jan 07, 2005 at 21:12

Friday, Jan 07, 2005 at 21:12
Hi there, I have a 3.0 auto patrol and have considered getting the DTronic. Does the power come on earlier than without the DTronic? cos mine waits a while to get up and go, and sometimes this is a pain in the bum. The auto box is good for taking up the slack of "turbo lag" but sometimes it hits 1800 RPM and does'nt want to go any further for a while. Usually this happens when I've backed off for a corner or in traffic, but out on the highway it eats other older forby's.

Cheers,

Muzz
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Follow Up By: Member - Captain (WA) - Saturday, Jan 08, 2005 at 01:13

Saturday, Jan 08, 2005 at 01:13
Hi Muzzimbidgie

The power comes on much earlier, the Dtronic has 354Nm (original max torque) at ~1350 rpm whereas it takes to 2,000rpm to get that torque without it. Corners that used to need 2nd gear are now easily taken in 3rd.

While I have yet to drive an auto Dtronic, I have been told the difference is even better on an auto (only heresay, but interesting none the less).

Cheers

Captain

Its not what you drive, but how you drive it!
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Reply By: Catchy snr - Friday, Jan 07, 2005 at 22:23

Friday, Jan 07, 2005 at 22:23
Hi All One of the main points that we dont seem to consider is that the turbo 2.8 and 3 ltr turbos is the size of the gearbox , I had the 2.8 heaps of power once the revs were up, and when I asked the dealer about the gearbox he said it was inbetween a Navara and the Patrol although I never had any problems with it,although after 120000 ks, a lot towing a quiet a heavy van , the box was starting to make some noises out on the highway, If had my time over again I would have gone for the heavier box . Hope this helps Catchy snr
AnswerID: 91864

Reply By: Member - Michael- Friday, Jan 07, 2005 at 23:52

Friday, Jan 07, 2005 at 23:52
Hi Muzzumbigie,
My 3.0L has the same problem,I suspect that it could be a faulty or stuffed ERG valve, I'm going to check mine out this weekend -I Hope.
Cheers
Mike
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AnswerID: 91873

Follow Up By: Johnno1 - Saturday, Jan 08, 2005 at 19:14

Saturday, Jan 08, 2005 at 19:14
it's the Nissan badge.
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