coozer
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| posted on 29/3/10 at 10:00 AM |
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MS Map Tuning?
I have my MS sorted but not ideal. Car starts runs, idles, revs, accelerates at quite a rate but due to the high speeds required I cannot map the bit
above 4K and more than 50% throttle So, cruising around is good, pick up is OK, although it lacks any real torque when pushing the pedal in 5th and
takes off when the vvt kicks in...
Is a rolling road session the only realistic way to get the thing running properly and with a bit of economy on board as well?
Was thinking of a track day but no time at present with 2 jobs etc...
Or is a step back to bike carbs the next step??
1972 V8 Jago
1980 Z750
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flak monkey
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| posted on 29/3/10 at 10:08 AM |
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Its difficult to tune the high areas of the map on the road. But I found that a good bootfull in second and third up to the limiter every run out was
enough (over 10 runs or so) to get the WOT AFR to the right ballpark (12.5-13) when I was tuning the pinto.
It got to the point (after about 500miles of logging) of being almost spot on 
It just takes time... as you get happy with each area of the map dont forget to alter the filters when doing analysis so MLV leaves those areas alone
Sera
http://www.motosera.com
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vinny1275
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| posted on 29/3/10 at 10:09 AM |
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What do you mean you can't map it past 4K and 50% throttle - the map bins on the screen don't go that far?
Save your current map, print it out so you've got a copy. You can change the values for the bins, if you're using TPS values, you can
alter it to fit your TPS / rev range.....
Cheers
Vince
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coozer
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| posted on 29/3/10 at 12:15 PM |
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Top corner of the map is 7200rpm and 100% throttle and that's about 155mph in 5th....
I'm using the Ve analyser in TS. Found it a bit more user friendly than MT.
I'll give the 2nd WOT a go, still canny fast once the vvt kicks in
1972 V8 Jago
1980 Z750
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sebastiaan
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| posted on 29/3/10 at 12:23 PM |
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2nd WOT and use the brakes to keep a steady speed.
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mark chandler
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| posted on 29/3/10 at 05:30 PM |
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Track day £150 rolling road £175- £500 just get an open pit lane, get a WB lambda, datalog and megatunix or play around with the config and use
autotune (my favorite).
Job done and a good day is had.
Regards Mark
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Jenko
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| posted on 30/3/10 at 07:59 AM |
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Use 3rd or 2nd gear to do some WOT runs - Then log them and see what the AFR is doing.........I managed to do a pretty good map from just doing
this......
I found the motorway (between two junctions) to be a useful area to be able to map.
MY BLOG - http://westfieldv8.blogspot.co.uk/
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coozer
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| posted on 30/3/10 at 08:04 AM |
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I have wideband, I don't understand how to study the logs in Megatune.
I did some logging and ran the corrector in MLV and the thing was worse!
I've used the Tunerstudio autotune feature to get the bottom end close.
I'll give the motorway 2nd and 3rd bit a go.
1972 V8 Jago
1980 Z750
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flak monkey
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| posted on 30/3/10 at 08:35 AM |
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Make sure your target AFR tables are correct.
Also remember if your VE table is so far out you get rich misfires, a WB lambda will read it as lean and just make things worse. Hence the need for
looking at logs in MLV when you can.
Autotune is good for the cruising areas but not so great at WOT.
David
Sera
http://www.motosera.com
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paulf
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| posted on 30/3/10 at 08:50 PM |
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I use the local bypass for mapping, it has some long and fairly steep hills that can be used to get a steady load in each gear sometimes with the help
of the brake pedal as well as trailing throttle when going down hill.I usually do a couple of slow runs and then build up speed a bit when I have seen
theres no camera vans about etc.
As said its best to use mega log viewer for low and moderate speed running and then manually adjust the top end of the map after studying the
results.
Paul
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paulf
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| posted on 30/3/10 at 09:00 PM |
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I have often wondered about the VVT system on Zetecs, it seems that on the Focus it is modulated by the solenoid valve being driven at a variable mark
space ratio,
rather than just on or off as with an after market ECU.It may be possible to design a unit that pulses the valve based
on the engine revs and load , ive heard of other people finding it is an on off effect with the throttle when it switches in which is not what you
want when cornering fast in a Seven.
Paul
quote:
Originally posted by coozer
So, cruising around is good, pick up is OK, although it lacks any real torque when pushing the pedal in 5th and takes off when the vvt kicks in...
Is a rolling road session the only realistic way to get the thing running properly and with a bit of economy on board as well?
Was thinking of a track day but no time at present with 2 jobs etc...
Or is a step back to bike carbs the next step??
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matt_gsxr
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| posted on 1/4/10 at 06:39 PM |
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As above 2nd and 3rd gear a for WOT.
When using MLV to autotune you do need to have things set up properly.
Correct inc. files in mlv
Lambda scaling in MLV (various different options)
Y-scale in MLV maps (as you are alpha-N)
Correct AFR map
TPS values in the AFR map (I had some problems with this with some tunerstudio versions)
Once MLV auto tune is working you will get there in no time for the fueling. Ignition is more difficult, but if you have someone elses proven map
(Flak Monkeys) and your trigger angle is correct then you should be close enough.
Matt
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coozer
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| posted on 1/4/10 at 08:04 PM |
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quote:
Originally posted by paulf
I have often wondered about the VVT system on Zetecs, it seems that on the Focus it is modulated by the solenoid valve being driven at a variable mark
space ratio, rather than just on or off as with an after market ECU.It may be possible to design a unit that pulses the valve based on the engine
revs and load , ive heard of other people finding it is an on off effect with the throttle when it switches in which is not what you want when
cornering fast in a Seven.
Paul
Paul, forget all the crap you've heard about the VVT. Its a mechanical system that uses oil pressure to vary the timing.
The solenoid is sitting on a 20amp fuse in the Focus and has switch wires going to it, not signal wires like ecu's use, if I give it 9v it
doesnt work, and, although I've no doubt its timed to switch at variuos points when the ecu decides I'm sure it doesn't pulse. The
solenoid switches the direction of the oil in the helical gear at the front of the cam depending if it has 12v or not.
Its an emmisions tool for the very lumpy cam but in our world can be switched to give us an on off type of thing. It switches in the Focus after
all.
Once the cam is in the advancing stage with oil at the front of the cam pushing on the helical gear it can vary by oil pressure.
Theres no point in pulsing the thing as its very slow anyway and too crude.
No doubt some smart arse will be along to shoot me down... again
1972 V8 Jago
1980 Z750
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