| [ Total Views: 939 | Total Replies: 23 | Thread Id: 94221 ] |
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 michelineister
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| posted on December 9th, 2011 at 11:51 AM |
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Bug fuel economy
Hi all,
Since i bought my bug I realised its got terrible fuel economy...I bought it in Adelaide and was driving to melbourne when it ran out of fuel just
after Horsham (yes I ran out of fuel for the first time in my life!) it does about 12 L/100 on cmbined cycle. Its got a dual throat webber & from
reading on about it on here I can safely conclude that here is my problem...and yeah I CAN seriously see the needle going down when you plant the
foot! So jealous of fellow buggers getting 35 mpg...
anyways cut a long story short, im sick of driving a bug but then paying for a Rolls Royce at the pump so I need a solution as its a daily driver. Im
heading to Mexico for a holiday over the break so coould anyone give me an indication if it would be a good idea to get a fuel injection system from
over there? would it fit on my 1600tp? would i have to change the heads over? is there an easier/more simple solution? open to advice opinion and
banter
cheers
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vlad01
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| posted on December 9th, 2011 at 12:03 PM |
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EFI is what I would do.
yes 12L/100km does suck
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE |
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BiX
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| posted on December 9th, 2011 at 12:29 PM |
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I used to get about 9 to 10 L per 100 on the highway with a 1776 and twin 40mm dells. all about the tune and setup. In the end the EFI is more precise
and fuel efficent. Worst fuel consumption I have seen has been 2km per 1L on a Evo6RS rally car I used to nav in (when on competition stages). the
fuel was $5/L to or $100 for a 20L drum, lucky i didn't pay the fuel bills!
I have no sympathy for my car, only the wallet that pays for it!
Go hard or go home!!!!
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 Bizarre
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| posted on December 9th, 2011 at 02:27 PM |
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Haynes manula puts an 1303 L bug at 25MPG - or about 11L/100kms
I get anywhwhere from 12L/100 in heavy city driving to 8L/100 on the high way
I have a 1303 with a 1916 and dual Dellorto 40's
Futue te ipsum!!!
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Joel
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| posted on December 9th, 2011 at 02:33 PM |
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Anyone who tells you they are getting 35mpg from a bug would only be driving a 1200 like a nun.
Is the engine all stock aside from the carb?
Carb is probably jetted way off, and if the preheat is non existent or all blocked up that will give you crap mpg around the city.
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ian.mezz
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| posted on December 9th, 2011 at 02:39 PM |
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yeah wat jOEL said .
Bug and fuel economy  
back when they made my beetle you could buy a litre of petrol for $o.37 $4.00 to travel 100Ks not bad.
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HappyDaze
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| posted on December 9th, 2011 at 03:28 PM |
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My 1961 40hp Beetle [which I bought NEW] averaged 30 - 35 MPG, after it was run in. Once on a trip it returned 40 MPG, which was better than the 36hp
Beetle that was my previous car. Petrol was more like 7c/litre, not 37c. 
Even after we worked the motor [bored to 80mm, cam, 2 SU carbies, etc.], it still returned almost 30 MPG on a trip. It also clocked 100 MPH at
Bathurst.
I'd rather wear a Beetle out by racing it than by polishing it!
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h
A.k.a.: Towely BuMpEr KING! ILLegal ALIEN on a roadtrip
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| posted on December 9th, 2011 at 04:03 PM |
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beetle or bus with fuel economy in the same sentence huh what's that?
if u want fuel economy by a new bluemotion
drive ur beetle for pleasure n fun not for counting penny's thems days are over
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 helbus
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| posted on December 9th, 2011 at 06:49 PM |
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12L / 100 is not too bad.
Our stock 1600TP Beetle is about 10L/100, which is good.
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waveman1500
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| posted on December 9th, 2011 at 07:11 PM |
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12 litres/100km is not terrible for an old car. It's worse than my Beetle does, but I'm not sure how good you were expecting. 10 litres/100km is
good. Depending on your driving style and the traffic, anything between 10-12 litres/100km is entirely normal for an air-cooled VW. Saying that it's
a Rolls Royce fuel bill is a bit strong, I think you'll find that a Rolls of the same era would be drinking at least 20 litres/100km!
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helbus
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| posted on December 9th, 2011 at 07:51 PM |
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Rolls Royce fuel bill.
Wonder what that would have been exactly in a 70's Silver Shadow with a 6750cc engine with automatic transmission in a 2100kg plus vehicle?
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grinderman
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| posted on December 9th, 2011 at 08:37 PM |
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Bug 10-12L /100km Polo 6-8l /100km
Service cost Bug $40 -$100 Polo $200- $1100
If your doing a 1000ks a week your better off in newer car, if your low mileage cheaper in long run with air cooled. But the bug wins hands down in
the 'cool' stakes. (unless its the middle of summer coz the polo got aircon)
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Bizarre
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| posted on December 9th, 2011 at 08:41 PM |
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you also need to check how accurate your speedo is reading
I have had up to 25% low
Futue te ipsum!!!
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68AutoBug
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| posted on December 10th, 2011 at 03:47 AM |
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| Quote: | Originally
posted by Bizarre
Haynes manula puts an 1303 L bug at 25MPG - or about 11L/100kms
I get anywhwhere from 12L/100 in heavy city driving to 8L/100 on the high way
I have a 1303 with a 1916 and dual Dellorto 40's
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hAYNES MANUAL MAY BE QUOTING USA MPG
as the US Gallon is smaller than the Imperial gallon..
so the 1303 may have been 28-30 MPG [imperial gallons] ??
but Your mileage sounds great... I have never really checked mine apart from looking at the gauge..
its much better than it used to be with the bosch 009 dissy
You could see the gauge moving at 100kmh . lol \\
its much better now with a bosch SVDA dissy
and I can now do 60 kilometres without the needle moving much at all..
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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FROSTY
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| posted on December 10th, 2011 at 09:39 AM |
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Hi There, I have just done my L's/100K a couple of times in the last weeks (sold my Passat so it's back to the trusty beetle for a couple of weeks).
It is 9.5lt/100K's. 1600cc TP, c/w crank, engle 110 cam, 36mm single Dellorto, merged exhaust. This is about 50%town and 50% Highway.
Thanks
Frosty
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matberry
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| posted on December 10th, 2011 at 09:53 AM |
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That's great Frosty, how accurate is the odometer, or are you all hitech with a gps?
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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donn
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| posted on December 10th, 2011 at 01:11 PM |
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Though as mine's a buggy and can't realy be compared, on a recent road trip to WA covering over 15000 km my 1600 tp with single 34 and twin hot dogs
towjng a small trailer got between.......best 9.8L/100k down to worst almost 13 L/100.... almost all highway style driving, the worst when crossing
the nularbor against a strong head wind, mostly I was driving at a very steady "grandpa" pace (long way to go and wanted to make sure the wench made
the distance so to save face and give the bird to those who said it wouldn't make the distance) though I did get up it a few times for short
distances, I must admit I thought I would have got better but under the circumstances I'm not complaining. 
I dream of a day when a chicken can cross a road without being asked for it's motive!
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FROSTY
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| posted on December 10th, 2011 at 03:19 PM |
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Hi Matt, its on the odmeter for the miles, i'm running Michlen 135's on the front this may change things ??
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68AutoBug
A.k.a.: Lee Noonan
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| posted on December 10th, 2011 at 03:27 PM |
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| Quote: | Originally
posted by FROSTY
Hi There, I have just done my L's/100K a couple of times in the last weeks (sold my Passat so it's back to the trusty beetle for a couple of weeks).
It is 9.5lt/100K's. 1600cc TP, c/w crank, engle 110 cam, 36mm single Dellorto, merged exhaust. This is about 50%town and 50% Highway.
Thanks
Frosty
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EXCELLENT frosty..
I will have to do mine one day...
I don't usually fill mine up.. lol
Lee
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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beetleboyjeff
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| posted on December 10th, 2011 at 04:50 PM |
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I have a 1916 with twin Kads, and I do drive it fairly hard. On a trip on the highway, I can get down into the 13L per 100, but when I get it
'angry' (especially on backroads and around town), I can get it into the 16s.
When I tow my trailer full of tools (about 7 or 8 hundred Kilos), it goes up to between 20 & 23 L per 100.
I have often checked my Odometer against the 5 kilometer markings on the highway, and my speedo is 400m short over the 5km. I have a correction on my
spreadsheet to give more accurate consumption readings.
One day when I get time, I plan to take it to someone who is good with Kads to tune it up a bit - I think my engine builder set it up fairly rich to
it couldn't lean out.
From your ole' mate Jeff
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michelineister
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| posted on December 11th, 2011 at 08:49 PM |
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| Quote: | Originally
posted by Joel
Anyone who tells you they are getting 35mpg from a bug would only be driving a 1200 like a nun.
Is the engine all stock aside from the carb?
Carb is probably jetted way off, and if the preheat is non existent or all blocked up that will give you crap mpg around the city.
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Yeah I took it down to my local carby joint a few weeks after I bought it as I thought a little rebuild might curb the fuel use...as soon as the guy
saw the carby he told me that those webbers run rich and there's not much you can do about it but re-jet it. The re-build didnt do much, just made it
run a bit smoother
To be honest, I dont know much about the spec of the engine as the previous owner didnt know much either. Your right about the pre heat - its been
blocked. Its got extractors and a hideaway muffler, electronic dizzy, proper external oil filter ...owner said the engine was built by a mob in
adelaide called 'kruger'...
So even a stock 1600 has crappy fuel consumption? on a car that weighs 850 kg thats pretty dissapointing..is it inherent to air cooling? is engine
operating temperature higher than on water cooled or something? Ive always had 4 cyl cars my bug wins hands down on thirsty stakes. My last car was a
peugeot 3 litre V6 1500kg and that returned just over 9L/100...im concerned as i now have to use the bug to get to and from work (approx 200 klms per
week) When you throw in tolls, Im spending $80 a week in fuel/tolls. Dont get me wrong I love the bug and it sits on 100 all day but I did buy it as
a second car at first. I was thinking of getting rid of the webber but if it doesnt make much of a difference then I might think about getting another
everydayer
Thanks for the tips all, I'll also check the speedo tmorow as not sure of the accuracy...cant be far off me thinks
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Joel
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| posted on December 11th, 2011 at 09:06 PM |
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I'd try and find a stock carb and manifold for it.
I'm betting it's a progressive Weber, those things are not even fit for paperweights.
A stock 1600 with everything all in order is pretty good on fuel considering its pretty well unchanged technology from the 30s.
My Lbug which is the heaviest model bug out there used to average 10L/100 around town and got down to 7.8L/100 out on the open road cruising at
100-110 and i won't admit to being an economical driver either with a bog stock engine.
Although that was before I verified my odometer as i had 14" wheels but it wasn't too far off.
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waveman1500
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| posted on December 11th, 2011 at 10:29 PM |
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| Quote: | Originally
posted by michelineisterim concerned as i now have to use the bug to get to and from work (approx 200 klms per week) When you throw in tolls, Im
spending $80 a week in fuel/tolls.
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Mate, 200km a week is nothing! Just deal with it! I'm currently doing nearly 600km per week in a WB Holden ute that does 12.5 litres/100km. That's
$100-$120 per week in petrol. I gladly do it because I enjoy driving the car. In the overall scheme of things, an old fuel-guzzling car is a lot
cheaper than buying and running a new car. Just think, on a new car you'd be paying at least a couple of thousand dollars a year in depreciation!
As Joel says though, the stock carb will give you better mileage than your single weber.
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helbus
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| posted on December 11th, 2011 at 10:30 PM |
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There are many aspects to vehicle cost
Fuel ,Depreciation, Maintenance
Our Beetle is not the most economical for fuel, but 9'ishL/100km is ok
I don't think it will depreciate, being a 40 year old car
Maintenance has cost about $1500 in the last 7 years/ 35,000km's. That is service, oil, tyres, brakes, repairs etc.
I would not get a 3 year old mini plastic thing that gets 6L/100, and see what I have after 7 years.
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