aaz fuel consumption

Post by **Swampy** » 26 May 2007, 21:50

I was thinking about getting bigger tyres on the van, but I still have the stock 14" wheels.

Would it not be safer to get some bigger wheels from somewhere (i.e 16" wheels) & wrapping the large size tyres round those?

Post by **"WEAZLECHIN"** » 27 May 2007, 11:24

just get rid of the steels, put something nice on.

Post by **HarryMann** » 28 May 2007, 23:16

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...

Careful! You'd be in danger of overgearing it so speed drops off markedly at the slightest incline.. and I really don't think a quick check over a week of the mpg, unless you do a 1000 miles or more the same every week, is long enough to be of much value. You need long term figures without a break before and after every change... but I've been saying that here for quite a while and just making a nuisance of myself

Hopefully we'll have a chart up tomorrow sometime of a new AAZ installation that's just done about 900 miles with all fuel recorded against mileometer... that wll give a datum for future modifications

Post by **lambrettalee** » 29 May 2007, 09:15

when i say larger wheels and tyres i dont mean massive the overall rolling radius is only 10mm larger than the standard wheel and tyre configuration so i believe i will get approx 3400 rpm in top at 60mph instead of 3600/700......if i have worked it all out correctly!!

Post by **HarryMann** » 29 May 2007, 10:08

That sounds OK..

Post by **lambrettalee** » 29 May 2007, 10:44

i will let you know how she goes, all being well the wheels should be on by friday. filled up again today, now done 1500 kms and its 33 mpg all day long... this is by setting the trip checking mileage and brimming the old girl obviously without chucking diesel on the road...

Post by **HarryMann** » 29 May 2007, 13:57

this is by setting the trip checking mileage and brimming the old girl obviously without chucking diesel on the road...

Fair do's, brimming is good. Trip works well for that system but you can easily lose long term trend - if write down mileometer as well on fuel VAT invoice, whatever happens, whether you brim it or not, you have a proper long term record, that can always be picked back up if you mess up. Even if you can't 't write mileometer on every invoice, keep them, this system still works fine for when you have time to do some sums or drop them into a spreadsheet (will put download link on Wiki asap)

Post by **lambrettalee** » 05 Jun 2007, 21:03

wheels are on , revs have dropped by 150 rpm in top gear, returned 32.6 mpg this fill up ,nearly 2000 kms on the clock in 2 weeks...