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Fuel econemy in sd33t engine

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

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Posts: 376
Joined: Mon Mar 22, 2004 8:31 pm
Location: Victoria, Outer eastern

Fuel econemy in sd33t engine

Post by berazafi »

just wondering what sort of econemy you guys are getting, mines not running right and only geting about 450kms out of a 60ltr tank
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Post by Shark »

Not that bad, i get on average 7 to 8 kms per litre out of a sd33 4spd manual.

Marc
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Post by mud13s »

Got a sd33t and get about 450Km to a tank, don't run it right low though as I don't want to drag gunk out the bottom of the tank (if there's any there!)

Paul
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Post by berazafi »

gee i thought the diesels would do a little better than that but i spose they are real heavy cars

Thanks for the replies
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Post by mud13s »

Got a sd33t and get about 450Km to a tank, don't run it right low though as I don't want to drag gunk out the bottom of the tank (if there's any there!)

Paul
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Post by mkpatrol »

I used to be abler to get 700k's from 75lt in mine but sadly now the rings are going to heaven I only get 550 & it wont pull up the hills anymore like it did. Mine has died due to excess fuel as I was too slack to do the injectors. Good excuse to le the minister for finance to let me buy a GQ. Wont be making the same mistake again though.
Don't ask me, ask them. I'm just runnin for my life myself.
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Post by V8Patrol »

Thank god for your post MKPATROL..... I was begining to think my 80 MQ was a freak !

1160 k's per tank !! ( 80 lit), I fill it once a month and it only does town driving, hasnt exceeded 90 kph for about 2 years !

Fatherinlaw had it b4 me and he recons he'd get just over 1200 k's from a tank but that was 4 or 5 years back.

speedo reading is 265,000 k's

Kingy
[color=blue][size=150][b]And your cry-baby, whinyassed opinion would be.....? [/b][/size][/color]
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Post by Shark »

Wow thatd awesome!!!! I have a 82 MQ standard Sd33 with only 150k on the clock and i would get around 7.5kms per litre on average. Mine is a 4spd with no front locking hubs though.


Marc
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fuel economy

Post by DR Frankenstine »

I get about 450 ks from mine (sd33t) also but it does get driven hard. Pushin 35s and tricked up for power
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Post by mkpatrol »

V8Patrol wrote:Thank god for your post MKPATROL..... I was begining to think my 80 MQ was a freak !

1160 k's per tank !! ( 80 lit), I fill it once a month and it only does town driving, hasnt exceeded 90 kph for about 2 years !

Fatherinlaw had it b4 me and he recons he'd get just over 1200 k's from a tank but that was 4 or 5 years back.

speedo reading is 265,000 k's

Kingy


Kingy,
Its not unusual to get that many k's from an early model SD33. If they are in good nick there is nothing better on fuel for the era, not even a 2L Hilux is as good. The turbo ones use more fuel but have a lot more power. Mine has been good & the only reason in not rebuilding it is because I want coil springs,

Browny.
Don't ask me, ask them. I'm just runnin for my life myself.
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Post by V8Patrol »

Screwy screwball has had it for a week now while I did the V8 conversion on his....... the guage was on the 1/2 full mark a week ago and is now 1/2 way between the 1\2 and 1\4 marks on the guage...... I recon its bloody good on fuel...... so does screwy ! :D

Kingy
[color=blue][size=150][b]And your cry-baby, whinyassed opinion would be.....? [/b][/size][/color]
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Post by Shark »

I dont understand why i dont get that kind of economy!!!


MArc
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Post by mkpatrol »

Mark

No freewheeling hubs would be part of the problem. What are the compressions, injectors and pump like? The 80's was the era of the Friday cars. When I was doing my apprenticeship we were starting to replace blue motor Holden engines pretty regularly. Some would last 300,000ks & others were lucky to make 100,000. It was a bit the same for Nissan as they were going through big changes in their company. Nissan engines were fairly good in the seventies but the quality went down until the late eighties. You will rarely find a problem with Nissan running gear these days.
Maybe thats as good as your going to get out of your SD33.
My mk at 300,000k's needs rebuilding where my old mans gq at 330,000 is in great nick & evarthing works.

Browny.
Don't ask me, ask them. I'm just runnin for my life myself.
Well they are all following you...
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Post by Justin_M »

This is an old thread, but i was reading it from the bible and wanted to post my own numbers :p

Well ive got an 85 MK n/a diesel, drive it pretty hard but most of my driving is highway at 100. Average economy seems to be 10l/100km, although a head wind can take it upto 12l. Hoping to go on a big trip next weekend so might see my real country driving economy.
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Post by Camshaft1 »

My old MK had a sd33t. when i bought it it had 405000 ks on it. i sold it to a mate with 412000ks on it and he still drives it. Fuel economy not fantastic but not bad either. Car has had hard life and compression is getting a little low but this thing still hauls arse! smokes on startup but wants its warm its ok. So all you Mk drivers out there with a sd33t that has 300000ks on it im tellin you i reckon you've got a fair bit of fun left yet!!
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Post by mkpatrol »

sold mine, bought a gq. much happier
Don't ask me, ask them. I'm just runnin for my life myself.
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Post by 5upaMav »

I was getting about 30mpg from my SD33T . . . 85 SWB, 5-speed with about 190,000ks.
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Post by grazza »

are these figures for real?
from a 25yo vehicle?

THIS IS 2004 FOR GODS SAKE

what happened?
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Post by 5upaMav »

grazza wrote:are these figures for real?
from a 25yo vehicle?

THIS IS 2004 FOR GODS SAKE

what happened?


steady on mate . . . the mk would only be 19 if i still had her. and we'll see how well your 1uz goes ;-) for fuel.
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Post by macca81 »

right, time to drag up an old topic, just saw it in the bible...


81 SWB MQ SD33, 60lt tank, 750km easy, tad less if im in the city abit and a tad less again if im offroad for more than a few hours at a time.

have gotten 900km from her once, was all highway work and never over 80kph (still on P-Plates)
[quote="Barnsey"]
Bronwyn Bishop does it for me.[/quote]
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Post by MQSWBUTE »

just got 415km from a tank but gettin a hard time as always :armsup:

sd33 pushing 35s
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Post by Wish I had coils »

i put about 30 litres in my mk long wheel base and lot 280 km's . Thats a bit of highway but mostly bush working pretty hard, i'm pretty happy with That!!!!!!!!!!!1
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Post by Patchy »

there a big engine. stop counting k's and drive it. if you start counting k's on any car you will never be happy, esspecally with the cost of fuel these days
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Post by Brendan-s »

still, for a 25 year old truck they make some good fuel figures. i cant wait to finally drive my sd33 with the 5spd!
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Joined: Mon Jun 27, 2005 9:13 pm

sd33t injector pump advance

Post by Sterlo »

Hey guys good too hear im not the only one using fuel in an sd33t. Normal ols split rims i get about 7km too the liter. but on 35's with speedo on 100km/h i can get up too 8.5 km/L.

I am a mechanic by trade so i thought if i wreck the motor it wont matter. It's a non-turbo motor with factory turbo and injector pump fitted. Ok you advance a petrol too just before it starts too ping this will improve enconomy. After talkin to many older mechanics they all seem to think the most nissan diesels are run retarded out of the factory. (Not too max performance)

Chasing better economy and more power i bit the bullet and advanced the pump about 5 too 8 degrees. This has completely changed the tune of the engine altogether. BUT there is no sign at all of white smoke, (sign of too advanced) I doo think i could go a little further with the timing because i have a lot of spare sd33 pistons, so melting one wont matter.

Am doing a trip too brisbane this weekend coming so will let you all know how it goes. Also,, Neary everthing in my cooling system is new (Rad, fan and clutch, hoses, T-stat) But it still runs about 95d/c when working which is too high i think for a 20 year old diesel. tests soo far have seen improvement with engine temps since advancing the timing.
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Post by macca81 »

Patchy wrote:there a big engine. stop counting k's and drive it. if you start counting k's on any car you will never be happy, esspecally with the cost of fuel these days
im gunna keep on counting when im getting econ like that! mite be a 25 yr old engine, but bugger me it runs on less juice than most 4wd's ya will get these days
[quote="Barnsey"]
Bronwyn Bishop does it for me.[/quote]
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