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Posted

About 20 miles to the gallon.

 

It totally depends on how you drive your car.

 

All the time you are accelarating the carbs are pouring the juice in, anyone that has opened the thottle with the carbs off the car will know what I mean.

 

If you do a long journey at steady throttle you'll get a bit more out of your tank full.

Posted

I know its not the same engine(cvh)but its 1700cc and running twin 40,s.I worked out the mpg of my fiesta travelling to shakey and back last Sunday and it managed 34mpg driving steadily with a four speed box.

If i drive like a loon it drops to around 15 mpg :(

Posted
20 miles to the gallon :shock:

 

Is that careful driving?

 

What do you get if you drive it hard then?

 

:lol::?

 

As the others have said m8, when driving careful and on a steady throttle you can see ok mpg, but when you acclearate they pour the fuel in the mpg drops.

 

My 20 mpg guesstamate was a kind of average guess of a bit of each style of driving.

Posted

yep, I agree. Best I've managed is a GPS verified 29.8mpg and that is in ideal conditions - steady 50-60mph cruise. Realistically it will be 20-25mpg. Thrash it and it will probably drop below 20mpg, especially with a lairy cam.

Posted

If your worried about what mpg its going to do then maybe you shouldnt fit 40s! ive had my old pinto on a 38dgas down to about 8mpg when road rallying, wouldnt think twice about a full tank in less than 60 miles

Posted
20 miles to the gallon :shock:

 

Is that careful driving?

 

What do you get if you drive it hard then?

 

:lol::?

 

 

F@@k and all mate LOL :twisted:

Posted

lol i darent think how much i use. i spent £25 in a day around the doors in my fiesta when it had a 32/36. Ofcourse i was driving like a nutter :roll:

Posted

i wouldnt worry about it mate. ten quids worth of fuel will give you a good hour of spanking.

 

what else could you get for £10 that would make you feel that good?

Posted
yep, I agree. Best I've managed is a GPS verified 29.8mpg and that is in ideal conditions - steady 50-60mph cruise. Realistically it will be 20-25mpg. Thrash it and it will probably drop below 20mpg, especially with a lairy cam.

 

Does'nt sound to bad then :mrgreen:

 

I mentioned to the guy im getting the engine from i might not fit them he said you need to or you wont have much fun :roll::wink:

Posted
40'S-CROSSFLOW, BIG FUN-LOW FUEL!!!

 

Agree 100% with the above :lol:

 

But i'd also get the car on the rollers for some tlc Once my carbs got a re-ajustment i found fuel econemy slightly better, but not much :mrgreen:

Posted
i wouldnt worry about it mate. ten quids worth of fuel will give you a good hour of spanking.

 

what else could you get for £10 that would make you feel that good?

 

thats only 2 gallons, u must drive like an old man mate! that wouldnt see more than 40 miles on a good day. TBH i have never notice much difference in mpg between a dgav and 40s on the same engine. depends how u drive it though.

Posted

Got the same setup you're asking about and as the guys have said, if you cane it you'll see the fuel gauge fall in front of your eyes, but just poodling about with sensible driving and its very good. Problem is, when you hear them barking away - sensible is no longer a word that exists in your vocabulary!

 

Personally, I could NEVER have an OSF without 40/45's - they're awesome!

Posted

roughly worked mine out this week 1660 twin 40s ported and polished few other bits done driving pretty much like i stole it most nites and i got about 20ish to the gallon

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