Fuel economy

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OLD FART
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Fuel economy

Post by OLD FART »

On the way to the Leyburn Sprints driveing in lightfoot mode I would have managed 580 klms out of the 75 litre tank :D 0r :( ?????
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panda
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Post by panda »

Thats 21.8 mpg (I dont understand L/100km) :) Its obviously tuned for power, not economy, as you can't have both.

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OLD FART
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Post by OLD FART »

Lee has it on wideband and tuned for economy between 2-3000 rpms
I've had mine since 03 07 92
85 JB 2323cc DOHC 4G63
THE OLDER I GET THE FASTER I WAS
GROWING OLD IS MANDATORY GROWING UP IS OPTIONAL
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FST4RD
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Post by FST4RD »

Thats 12.93 litres per 100k's... that's pretty high.

Not comparible but my 1500cc sohc Mazda does about 7 litres per 100k's around town and it does better on the open road.
My old Evo1 with only filter and exhaust mods on the open road did about 8-9 litres per 100k's depending on whether it was around town or on the open road.
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Alspos
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Post by Alspos »

Also depends what weight was in the car, fat tyres, camber and toe in and so forth. And how "spirited" any overtaking was etc.

I do recall I got around 650 km or so on 70 litres once upon a time, two up with one bag each just freeway cruising not in a hurry.
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docile
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Post by docile »

FST4RD wrote:Thats 12.93 litres per 100k's... that's pretty high.
I agree. AFR should be around 15-16:1 for real economy driving which would see you at about 8Ls or so per 100k's
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OLD FART
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Post by OLD FART »

Remember it has cams and a TO4B/GT35 + 870 CC injectors and a 3.9 diff
I've had mine since 03 07 92
85 JB 2323cc DOHC 4G63
THE OLDER I GET THE FASTER I WAS
GROWING OLD IS MANDATORY GROWING UP IS OPTIONAL
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thrash
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Post by thrash »

is an afr of 15-16:1 safe for a hipo engine, even at low loads?
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redzone
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Post by redzone »

at cruise, yes.

engines get killed from detonation WAYYYYYYYY quicker than from lean mixtures..

thats good economy from something as cammy as your car Rad...
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fugazi
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Post by fugazi »

13 liters/100km is acceptable on a car with that kind of power.
But... at low loads/cruise you could lean it a bit and still be safe!
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Alspos
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Post by Alspos »

I think the 3.9 is the issue here. You need another gear :)
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