MK1 MPG build need your input,please reread,I edited my post

[krusher]

[ps2375]

On a water-cooled motor, I wouldn't worry about that spread, there's plenty of cooling to deal with any heat generated and the motor is under minimal load. Now if it was doing that while under heavy load, different story. I specifically made my maps to run that lean at that specific condition. Even when passing a Semi-truck and pushing thru the wake coming off the front of the truck, the slight throttle tip in required moved the targeted AFR out of the lean area so it didn't have to "fight" to get thru it. And any sort of headwind requiring more throttle took it out of that range also. It's all in the tune...

[vwsparts.com]

http://www.endtuning.com/afr.html

I think at least for now I am going to use the 1600 motor, wide box 4 speed solex 1bbl dual downtube early exhaust, the 14' lrr tires off the toyota and monitor my a/f at my most common speed which is usually 60-65. I think if I can jet it to 14:1- 14.5:1 everything will be about as good as it can get for the money and time involved. I do wonder about a cam with less valve overlap. But I have all of this left over from other projects and have 200.00 in the caddy body. I really don't see how I can lose. Thanks Everyone and please don't quit chipping in if you think I should do something different please say so. Does anyone remember if any of the carby rabbits had egr?

[Butcher]

My 76 Rabbit had a carb and EGR. I got rid of both and installed 40 DCOE's.

[vwsparts.com]

[TDCTDI]

I had a 81 Caddy that had a 5-speed trans with an overdrive 5th, I installed a 1.8 from a 83 GTI with the Caddy's CIS & drove it like that for a few years. The guy I sold it to drove it from NC to Vancouver & claimed that it got around 41MPG.
_________________
Everybody born before 1975 has a story, good, bad, or indifferent, about a VW.


GOFUNDYOURSELF, quit asking everyone to do it for you!


An air cooled VW will make you a hoarder.


Do something, anything, to your project every day, and you will eventually complete it.

[Butcher]

I get at best 31mpg regularly with my 81 1.7 5sp Caddy. I really have a tough time that the person got 41mpg.

[vwsparts.com]

[TDCTDI]

That's what he said, I know that it got better fuel economy than any other vehicle that I had at the time but I personally never tracked it. Perhaps he went the opposite direction from my grandfather's "uphill both ways in 1' of snow with with the wind in your face".
_________________
Everybody born before 1975 has a story, good, bad, or indifferent, about a VW.


GOFUNDYOURSELF, quit asking everyone to do it for you!


An air cooled VW will make you a hoarder.


Do something, anything, to your project every day, and you will eventually complete it.

[vwsparts.com]

[vwsparts.com]

[krusher]

[Butcher]

My Rabbit pickup gets 30-31mpg [28-30mpg in the cold winter months because I warm it up]. It is completely stock w/CIS, +215k miles, never really maintained [and I'm a mechanic], I use synthetic oil, and it only has a coolant pump/alt belt. There is no power steering or A/C.

To be fair, there is no dash or carpets [I was looking for a water leak and once I found/fixed it, I wanted to QC my work, 3 years later, it's still not leaking] but there is enough junk in the bed that covers the weight of the items out of the interior. It's a mechanics truck that I use to pick up/deliver clients cars and used parts. I always get a weird look when I drop off my beater Caddy to pickup a clients $100k+ car. The look of the clients face when I bring it back fixed is even more priceless.

Not that you should, my Caddy will accept at least 2 more gallons if I trickle the fuel in it. Some pumps allow me to do it, some do not. When I fix the fuel level sensor, I will figure out how to make it take that last 2 gallons easier. I've seen over 400 miles on a tank full when I do that. Since the gas gauge does not work, I usually start to look for gas at 350 miles and start to stress at 380 miles.

[skills@eurocarsplus]

I have an 82 2.0 16v caddy. running all the stock engine management, and A/C. I forget the trans in the truck now, but it's a tall geared 8v as I recall.

I can pull about 33 mpg@ 80. if I drop to 65 I can get about 38. don't know what your goals are, but unless your run a 9A or 2Y transmission an 8v will be a bit slow by todays standards.
_________________

[joemac42]

[oprn]

My '76 Rabbit 2 bbl carb got a best of 34 mpg (imperial gallons) right from new. Deleting the EGR did nothing to change that one way or the other. My daughter has a '92 Jetta with stock 1800, 5 speed and injection that gets over 40 mpg. Based on that I would go with a 5 speed, 1800 and CIS from your parts collection.

A smaller engine does not always make better mileage because it is working harder to do the same job.