Mpg.... Query on improving mine with the setup i have

Thanks for the extra comments people. I went quiet on this for a bit as I was looking into things further.

I spoke with the guy who did my jetting on the rolling road and he has invited me back (Free of Charge), to do some checks and extra tweaks. I havent had a chance to do that as yet but hopefully in the next couple of weeks!

 

you might benefit from trying some of the other timing curves on the 123 and check that the one you have chosen actually uses the vac port sensor. (you can do that by tweaking open the throttle from idle and checking that there is a significant advance for minimal revs increase, or at a steady warmed up idle get a longer pipe and attach to dizzy and at idle suck like xxxx on it and your timing should advance notably) whoever is rolling road tuning your van should check your timing is correct and ask you to ensure you have yout tappet clearances done correctly.

FYI my 1835 averaged 30.4MPG pump to pump going to nottingham from abingdon with a couple of 20 mile cross country commutes in there too. (38.77L and 259 miles).

Good luck

JB

 

and when you can do 60 in 3rd it doesnt take at all long to get there! >

 

That's my next step, gearbox and a few mods to the engine

 

Thats a lot of fuel savings needed to pay for that

 

larger wheels and tyres on the back end will up the gearing and not cost too much

 

Personally i like my bay slow its part of the character, mind you i do have a 1641 and twin carbs to help with the hills

 

But each revolution will need more fuel, and cause more stress to the engine, wearing it more quickly. Sounds better though.

 

But if you've built the engine for that purpose, then you would've taken that into account

 

Hypertetically what is the best way to increase torque?? Let's say I'm not worried about maximum power on my 2 litre that is set up as standard?? I want an engine that has wonderful lowdown torque characteristics. In theory this should help city MPG shouldn't it??

 

Stroker crank...

But if you're sticking with the 2L, then bigger valves and a different cam, and a decent pair of twin carbs

 

^^ This is the way forward

 

OK! I've just read thro' this and I have some observations. I've not had Pample on the road for 9 months, but in the meantime I have seen the light .
My daily, a landrover 110 2.5 tdi, had a 6 years avg of 26.5mpg, now for the last 10 tank fulls , its around 30mpg, bearing in mind its full-time 4wd and offroad tyres.
Mrs's daily, a 2000 my Yaris, normal avg 46mpg, now 58-60mpg, We went from Kent to Brighton and back on 2 gallons of petrol!!! 127 miles avg 63.9mpg
Now pample has a full fresh tank of petrol and off we go to see what we can do.
I discovered a word accidentally, that I'd never heard of and had to investigate.
the word is 'Hypermiling' check out the forum on this baby.....http://ecomodder.com/
A vw bus is not a modern car, its engine has a totally different power caracteristic, and I tend to smile when people spend lots of money trying to make a 2 ton bus with a moped engine , drive like a new hot hatch. the vw engine likes to rev, ie drive around town in 3rd gear, on light throttle. 50mph on the M25 is TOO SLOW! the engine is working out of its power zone, try 56-58, and wait till a nice large lorry slides past you and then tuck in, and then feel your foot easing of the gas.
Accelerate in a different way, ie easy away in 1st then hard and short in 2nd 3rd and in to top, up to speed , then ease off. Pump up the tyres, I've got 40 front 50 rear, buzz along on open roads, then when a slip road or down hill comes along, short hard burst on the gas, then knock it out of gear, and let it roll, you'll be surpised how far you go before your back in gear. The website tells you all you need to know about hypermiling,
eg a journey ffrom A-B has 2 possible routes, 1 is flat, 2 is hilly, both effectively the same distance, which is the most (or rather which , if driven correctly) is the most fuel efficient route.?????????? Thats right if you said no 1 you were absolutely .....wrong.
I had to re-learn 30 years on driving techniques, but boy is it addictive. Took the bus out today flew up a long hill in 3rd, then must have coasted at least 2-3 miles throughout the journey, of say 30 miles. Cant wait for the next fill up, last one was 22.4mpg most of that in October last year.
its possible that as your engine becomes more powerful with the power characteristics that you crave, so your driving style has also changed, and you are now using the power, with a detrimental effect on economy.

 

Keep us posted Yostumpy though l don't recommend coasting with the bus out of gear. Perhaps in stop start traffic but that's it. Engine braking can be very beneficial.

 

I now think of driving a car in a different way, I think of my self on a heavily laden bycycle when I'm tired, WHY would I want to pedal DOWN a hill, I use the engine to get to the top of the hill, then its a free ride baby!!!!