monck
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| posted on 18/2/12 at 02:44 PM |
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Dont really care about mpg in the 7 but...
With my old engine (1.8 zetec 2L cams and twin 40's) i attempted to see how lower mpg i could achieve
I managed to get it as low as 23mpg if you went mental..
Ryan
[Edited on 18/2/12 by monck]
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Mark Allanson
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| posted on 18/2/12 at 02:51 PM |
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Hugh, just a a baseline for you, my car has a standard 2.0i setup, almost as Uncle Henry intended, std ECU etc. I get 18-24mpg when thrashing it, mid
30's when just driving to work and general stuff and 60+ when my speedaphobic Mrs is in the car, driving in 5th at speeds of less than 50 while
touring Cornwall. With the EFI, the car will pull smoothly from 5mph in 5th so almost an auto!
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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RK
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| posted on 19/2/12 at 02:58 AM |
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http://www.classicfordmag.co.uk/files/2011/07/CLF166.bike_.pdf
Zetec bike carb conversion and ignition rwd kit car mk2 mk1 escort ford rs rally | eBay
found this on RHOCaR
[Edited on 19/2/12 by RK]
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sebastiaan
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| posted on 19/2/12 at 07:59 AM |
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Yousaid you are already running megajolt, but is that in 2D or 3D mode? You can gain a lot by having more part load advance. I think my map in the
MS-extra pinto (running a single plenum chamber) goes up to something like 50 degrees of advance at part load.
Of course, changing to fuel injection (either a single plenum or throttlebodies) will make it more efficient too, but only if it is well mapped and
not just tweaked to get as much power at WOT as possible. Running the pinto lean with some more advance in part load will make it significantly better
on fuel.
ETA: I get around 30mpg on my setup with a standard head and fast road cam.
[Edited on 19/2/12 by sebastiaan]
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tul214
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| posted on 19/2/12 at 12:41 PM |
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Might be a stupid idea but can you do a LPG conversion?
1.6 Raw Super6 sold
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Simon
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| posted on 19/2/12 at 01:05 PM |
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quote:
Originally posted by YODI
Diesel kit cars are an epic fail, if you are that desperate for economy don't buy a kit car?
Bollocks!
ATB
Simon
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Slimy38
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| posted on 19/2/12 at 02:41 PM |
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It's interesting to read people's view on fuel economy. As I'm just starting on the road to car ownership, one thing I was hoping
for is an 'option' to run economically. Yes, 90% of the time I will be enjoying myself, but I'd still want the car to save a bit of
money for the inevitable commutes to work.
I definitely wouldn't go down the diesel route (spoiling the whole concept of a superlight car), but I'd have thought a production engine
designed to shift 1.5 tons plus would use less fuel to move something less than half the weight?
Edit: Actually, rereading the replies Mark's car seems to have the behaviour I'd expect, ranging between 18 and 60 depending on
who's lead foot is involved.
[Edited on 19/2/12 by Slimy38]
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Slimy38
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| posted on 19/2/12 at 02:42 PM |
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quote:
Originally posted by tul214
Might be a stupid idea but can you do a LPG conversion?
Given how much space they use up on a production tin top I can't imagine the tank being able to fit anywhere.
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Hugh_
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| posted on 19/2/12 at 04:03 PM |
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Had the steadiest run out in the car yet this morning, due initially to damp/frosty roads and then traffic, lots of steady 50-60mph and managed the
heady heights of 23mpg! If I can get a steady run nearer 30 then I'll be happy. Had a stonking and somewhat faster 20miles after filling up
which convinced me I don't really want to change the cam.
I'm in the process of trying to negotiate a bit on an airbox (there'll be a thread about a possible bulk buy on Airbox
throttle caterham jenvey air filter westfield 7 small inlet manifold | eBay very soon after this post), and have ordered a lambda sensor/AFR
gauge. Hopefully a combination of the airbox and making sure I'm not running rich I will get somewhere nearer to that magical 30mpg!
quote:
Originally posted by sebastiaan
Yousaid you are already running megajolt, but is that in 2D or 3D mode? You can gain a lot by having more part load advance. I think my map in the
MS-extra pinto (running a single plenum chamber) goes up to something like 50 degrees of advance at part load.
Of course, changing to fuel injection (either a single plenum or throttlebodies) will make it more efficient too, but only if it is well mapped and
not just tweaked to get as much power at WOT as possible. Running the pinto lean with some more advance in part load will make it significantly better
on fuel.
ETA: I get around 30mpg on my setup with a standard head and fast road cam.
It's running 3D, I've never really looked at the ignition map beyond checking that the advance was changing with revs & throttle
position, and changing the rpm bins at the bottom end slightly to help with a steady idle. The map was given to me by a chap with a Vulcan built
pinto in a very similar spec to mine so I've not altered it! Screen shot of the map below, there are no load bin corrections. Any thoughts?
Megajolt map by Hugh_Gabriel,
on Flickr
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jacko
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| posted on 19/2/12 at 04:44 PM |
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Hi Hugh
i have more or less the same set up as you
2.1 pinto
285 piper cam
zx9r bike carbs
light fly wheel
modified head and i get 30mpg on a steady run down to about 20mpg is i put my foot down
Jacko
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sebastiaan
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| posted on 19/2/12 at 04:52 PM |
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This is my table copied from the MSQ file. Mind you, the car is N/A but the table axes go up to 130kPa in anticipation of possible future boosting.
<constant cols="12" name="advTable1" rows="12" units="deg">
20 23 30 34 38 46 46 46 46 46 46 46
20 24 31 35 39 44 44 44 44 44 44 44
20 24 31 35 38 42 42 42 42 42 42 42
20 24 31 34 36 40 40 40 40 40 40 40
20 23 30 33 36 38 38 38 38 38 38 38
20 22 29 31 34 38 38 38 38 38 38 38
20 20 24 27 33 37 37 37 37 37 37 37
20 20 23 27 33 36 36 36 36 36 36 36
20 20 22 27 33 36 36 36 36 36 36 36
12 12 15 20 28 36 36 36 36 36 36 36
10 10 15 20 28 36 36 36 36 36 36 36
10 10 15 20 28 36 36 36 36 36 36 36
</constant>
<constant name="mapBins3" rows="12" units="kPa">
20
30
40
50
60
75
89
90
100
120
130
150
</constant>
<constant name="oddfire">"No"</constant>
<constant name="rpmBins3" rows="12" units="RPM">
300
700
1500
2000
2800
3600
4400
5200
5500
6000
6200
6500
If you look at the area around 2000-3000 RPM, my advance goes uo to around 36-40 degrees in part load. You've got quite a lot less. I'd
get the wideband and airbox installed and then spend some time at a rolling road to optimize the area between 2000 and 4000 RPM in partload. Up the
AFR to around 15-15,5 (if the engine takes it, with the lairy cam it might have too much internal EGR to put up with running a bit lean) and optimize
the advance to get max power at every throttle opening. This does take a bit of skill to do, but any rolling road operator worth his salt should be
able to do this.
An LPG conversion is a good idea, the tank can go above the diff (a 200mm cilinder should fit and give a decent fuel capacity), but don't do it
on a pinto unless it's got stainless valves and decent valve seat inserts or you'll be forever checking and setting clearances. Oh, and it
would only work satsfactorily if you install a multipoint injection system piggybacked off a decent EFI install, so probably a bit more involved than
you'd want.
[Edited on 19/2/12 by sebastiaan]
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Hugh_
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| posted on 19/2/12 at 05:06 PM |
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Yeh see what you mean there! I'll get the lamdba sensor fitted and the airbox in then have a play on a rolling road.
Is yours running a MAP load sensor or TPS? Mine is TPS and it seems odd that the load goes to 152 as TPS range is 0-100%? How does it translate TPS
reading to load?
Cheers
Hugh
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sebastiaan
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| posted on 19/2/12 at 05:09 PM |
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Mine's running speed density (single throttle plenum) and uses MAP as load signal. Nice and straigtforward, lots of mid-end grunt and noting to
go out of tune.
Maybe your setup used AD counts (raw voltage/5*255) as load signal? I'm not familiar with the megajolt setup, but that might be the case.
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Hugh_
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| posted on 19/2/12 at 05:13 PM |
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Ok thanks, I'll get it hooked up to the computer again and check what load it is registering with throttle position.
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