aaz fuel consumption

Post by **"WEAZLECHIN"** » 16 May 2007, 20:41

believe me its loads better. you can stay in first gear for more than half a second(just like a proper car)....... take a look at my rear tyres or horzas in the photo, we didnt go and fit big fat 4x4 tyres for just the comedy effect!!!!!!

Post by **HarryMann** » 16 May 2007, 21:22

They both pull top gear OK on motorway inclines with a 20% hike in gear ratio? my old (tired) AAZ struggled with an 8% increase, and it was Doka gearing to start with

Post by **brookie** » 17 May 2007, 09:59

The only time I accurately check my mpg is when I brim it at Cherbourg and beep beep to the south of France as I zero the miles when we go.
About 900 miles later ( and a couple of refills) I brim it at Cherbourg on the return trip (cheaper fuel in Frogland) and I get 30-32 mpg.
We have an AAZ HIGHTOP,fully loaded up with 4 on board so I think that's ok.
Other factors; the roads are brilliant,smooth and dual carriageway almost all the way with no town driving, standard 14" tyres and standard 5spd box, front spoiler, and we sit at 68mph all the time (he likes that speed).
As for our crappy roads and conjestion I'd probably expect high 20s.
Hope that gives you an idea of what to expect.

Post by **HarryMann** » 17 May 2007, 10:14

That's a good way to do it, and 32 is damn good for that situation - a good genuine figure... that seems to be cropping up for these 1.9s on long runs with HighTops (Jake into North Africa) - will Wiki that

I've stopped using the 'zero the trip' metjod and always use the mileometer/odo, scribbling the current figure onto the VAT receipt, or the litres and odo reading on a list in the cab...

That way, at any time in the future, months after, when you happen to be flush and 'brim it' again, it's easy to re-check the current mpg figure, provided not one fillup was missed (as the odo will ahve turned a few 1,000s by then and I always forget, though in reality not that difficult to work out how many times)

Going a stage further, its pretty trivial to whack them in Excel and then chart them out, giving one, two or three curves...

1) Brim to Brim (jnstantaneous mpg)

2) Mpg to date (total miles/total fuel)

3) Running mean (averaged over 3 figures, one before, one after and the point of interest)

The last one, Excel has a chart option for so its pretty easy, or can be a calculated column, but the beauty is that it automatically shows a nice smooth mean curve, taking out any 'bad brims', short or over-full...

The mpg to date, mpg since the very first datum brim, is the one that usually proves to peeps (eventually) they they really aren't getting anything like the mpg they think... more often than not it slowly drops and drops and drops... strange that

Post by **billy739** » 18 May 2007, 07:56

did tis similar method on the 1.9 dg high top camper last august
did 1040 miles in 2 1/2 weeks round deven/cornwall
full load 2 adults 2 kids
total average mpg was 27!
done a similar with my 2.1 turbo diesel peugeot engine which turned 42 mpg! but thats an tin top panel van 2 berth camper

Post by **billy739** » 18 May 2007, 08:01

just a note on tyres
it makes a big difference to the width of tyre used,any thing to wide ,say 205 probably has a negative effect on mpg
235/50/18 is what i have on my panel van, and is a definate difference to the 205/75/16 i had before, although close in diammeter
i was changing the 14 inch rims to 15 mercedes rims and fitting 195/80/15 tyres to the rear,thes seemed to lift the ratios just enough.
in fact it took the 5spd 1.9 petrol box to the 2.1(aap)with standard tyres ratio!
always try for the aap 2.1 as a start though

Post by **lambrettalee** » 19 May 2007, 20:46

ok aaz engine fitted and she returned 31.5 mpg over 400 miles with a mixture of town and motorway driving going no more than 65mph, same as the 1.6td!!

Post by **HarryMann** » 19 May 2007, 21:46

Very good then, and wtih a fair reserve of power I should think

Post by **lambrettalee** » 19 May 2007, 22:30

plenty of go now but top speed no more than 80 mph due to gearbox but shes all good!!

Post by **"WEAZLECHIN"** » 20 May 2007, 19:19

then get some "phat" wheels and tyres on, thats your ratios sorted!!!

Post by **lambrettalee** » 25 May 2007, 19:02

gone for 215/60/16s not fitted yet though... second tank full returned 33.3 mpg... better than the 1.6td

Post by **"WEAZLECHIN"** » 25 May 2007, 19:55

you wait till those tyres are on, will be like a different van

Post by **camper** » 25 May 2007, 21:10

I read with interest this topic and may go for a AAZ conversion myslf.But i notice that tyre wheel size is discussed but not gearbox changes.So are the majority of these AAZ running still using a 1.6td gearbox ie ABH code?

Post by **lambrettalee** » 25 May 2007, 21:46

mine is the "standard" td box 5 speed, no idea what the code is, it would do 75/80 mph at a push , i still drive the AAZ as i did the jx 1.6, it pulls a lot better and gets to where i want it quicker and appears to be better on fuel, bearing in mind its only been in 8 days and done 1000kms so its still settling, the fuel consumption is less than the jx by a small margin at present,33mpg compared to a previous 30, this is with a mixture of dual carriage/motorway and town driving and it never really sees more than 60mph anyway, this is at 3600ish rpm (with the 145 tyres on)will do a consumption check with the larger wheels/tyres on next week!!! the van is a high top california part loaded...

Post by **"WEAZLECHIN"** » 25 May 2007, 22:05

yes, why go through all the hassle of gearbox swaps when you can get "nice" alloy wheels with big tyres that alter the final drive ratio anyway. and you dont even get your hands dirty

Club 80-90 Forums

aaz fuel consumption

AAZ fuel consumption

just a note

tyres