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Fuel economy Triples


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#21 ozy

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Posted 08 May 2009 - 05:37 AM

just after crunching the numbers

L28 with triple solex carbs in a 78 Zed

15.55 litres / 100km
6.43 km / litre
18.16 mpg(imperial gallon)

this was a mix of highway cruising, but there was a lot of squirting too, more than intended.

next 2 runs will be an economical trip to empty the tank and a rip roaring adventure to see how bad it can be!

#22 nuclear_z

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Posted 08 May 2009 - 01:55 PM

Get it sorted, Where do I start

When i put my foot down i can see a cloud of unburnt fuel out the back (grey to black smoke)
I take it to a weber specialist (so he says) what would you say is the problem.

Just read your post scootag and yes i do get alot for backfire and the plugs do fouled up alot


This kind of tune is probably doing a lot of damage to your engine.... That much fuel in the cylinders will wash the bores, preventing the necessary oil coming up... Talk about massive engine wear...

Other thing is, if it was tuned properly, you'd find heaps more performance... Can recommend a shop that has weber tuned my cooper s... Very smart operater...

#23 towndrunkensmurf

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Posted 08 May 2009 - 06:30 PM

WTB weber tuner in Townsville.. havent worked out consumption yet (due to unrelated engine failure during tuning argh) but will post on here once the new engines in.

#24 Mr240z

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Posted 08 May 2009 - 06:37 PM

This kind of tune is probably doing a lot of damage to your engine.... That much fuel in the cylinders will wash the bores, preventing the necessary oil coming up... Talk about massive engine wear...

Other thing is, if it was tuned properly, you'd find heaps more performance... Can recommend a shop that has weber tuned my cooper s... Very smart operater...

Thomas I talk to about this soon...Thanks mate

#25 e9

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Posted 24 January 2011 - 05:11 PM

I know I'm posting in a zombie thread, but I (finally) have some numbers to contribute. I drove
down to Canberra from the Gold Coast on Saturday filling up with either Vortex (Caltex) or
Vpower (Shell) until the bowser pump clicked once whilst taking odometer readings and keeping
receipts as I went.

Setup is manual '76 2+2 with a newly rebuilt L26 (stock bottom and top), performance cam, triple
DCOE 45s (tuned slightly to the lean side) with the manifold match ported, extractors, Pertronix
ignition and a flamethrower dizzy.  I did however forget to widen the spark gap to my preferred
0.045".

It goes without saying that I adhered to all the road rules and at no time drove recklessly or
above the speed limit ;D

Working it out now in the end I drove 1124 kilometres (averaging very roughly ~95km/h) and
used 103.34 litres of fuel (wait, what?  That economical?).  In short, 10.88 kilometres per litre
or 9.2 litres per 100 kilometres.

#26 luvemfast

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Posted 24 January 2011 - 06:37 PM

In short, 10.88 kilometres per litre
or 9.2 litres per 100 kilometres.

Thats pretty good economy.
Last time I went to Winton, I got about 40L per 100km  ;D (no joke)

#27 Scoota G

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Posted 24 January 2011 - 07:39 PM

Was that a Manual or Auto girlie type gearbox  ;D

#28 dalee

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Posted 25 January 2011 - 08:46 AM

you got 112MPG?.........sure you did ;D


I don't know where you leart to do maths Salty, but the standard conversion for the rest of us is

112MPG = 2.1L/100km 
and
40L/100km = 5.9MPG

- using the US gallon 3.785L. NB- you would get a different result using the English gallon of 4.546L

#29 benny

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Posted 25 January 2011 - 09:12 AM

dont mess with dale.... he's our resident number cruncher!!

#30 Whittie

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Posted 25 January 2011 - 11:00 AM

I'm running a pretty mild cam, 2800cc L28, but 45mm Webers with a 4.4 diff. Usual course of events with the diff is requirement to rev to 4000+ between gear changes just to make the car actually move above a snails pace on the road.

18L/100km

On the race track it's 80L/100km  :o

#31 e9

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Posted 26 January 2011 - 08:12 AM

I forgot to mention that I was carrying a bike, clothes, a couple bags, a few smaller boxes and one larger box labelled, "LJR 260Z Parts".

Thats pretty good economy.
Last time I went to Winton, I got about 40L per 100km  ;D (no joke)

Running a little rich there haha.  I was really surprised when I crunched the numbers.  I guess driving through relatively flat country right after having a tune-up does help though.

Was that a Manual or Auto girlie type gearbox  ;D

Pssh, auto...definitely a MANual (for manly men ;D)

http://www.tdiclub.c...onversions.html
thats the link,
I put in 40 on the top right, KM/Litre and got 112.MPG. thats imperial, 94 US MPG I think

Thanks for the link, 9.2L/100KM works out to be 25.98MPG (Imp) or 21.63MPG (US)

I'm running a pretty mild cam, 2800cc L28, but 45mm Webers with a 4.4 diff. Usual course of events with the diff is requirement to rev to 4000+ between gear changes just to make the car actually move above a snails pace on the road.

18L/100km

On the race track it's 80L/100km  :o

I tried to convert your track economy using the TDI Club link: "L/100KM field has invalid data: 80 not in range" ???

#32 luvemfast

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Posted 26 January 2011 - 08:52 AM

Running a little rich there haha. 

I did mention that I was at Winton didn't I?
Trackday!  8)


#33 e9

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Posted 28 January 2011 - 11:38 AM

I did mention that I was at Winton didn't I?
Trackday!  8)


Ahh that makes more sense, I thought you meant you got 40L/100K driving to Winton.




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