A little confused now . . .

Tom · Post by **Tom** » Thu Jul 26, 2007 4:48 pm

Hi guys, well i've been out for a few runs in my XE powered mk2 escort and am very impressed with the mjlj. I now want start mapping it myself but am not quite sure where to start.

What do the load and rpm bins do and what benefits would i get (and why) if i changed them?

with the ignition map, is it just a case of suck it and see? what works, what doesn't etc?

Thanks in advance
Tom

david jenkins · Post by **david jenkins** » Thu Jul 26, 2007 6:32 pm

Tom,

You might find the first section on http://www.enginelogics.com/embasics.html useful - the bit called "What is a map". After that section it goes into injectors, so don't worry about that! The bit about the ignition map is very well written, if brief.

The whole process of developing a map isn't very well described anywhere - I started with a safe 2-dimensional map for my engine type (Ford Crossflow) and slowly modified values to get a decent range, based on a 3D map developed for an engine similar to mine.

Perhaps some kind soul would write a "how to create a map" guide!

HTH,
David[/url]

Tom · Post by **Tom** » Thu Jul 26, 2007 9:18 pm

or in my case 'how to create a map guide for dummies'

thanks for that i'll have a read

MartinM · Post by **MartinM** » Thu Jul 26, 2007 10:13 pm

I guess if you have an XE-powered Escort then:
a) That's very nice

(got any pics?)
b) I guess you are into maximising power

If it's non-standard and expensive then I recommend a reputable Rolling Road and a good operator. They'll do it quickly and safely.

For a competition engine you need to maximise the advance at any (non-idling) point in the map so that you get maximum power. A RR guy will keep increasing the advance at each (constant) rpm until the power stops increasing and will then back off a couple of degrees. Then he/she will do some magic to determine how to vary the advance with TPS/MAP for an accelerating/decelerating engine and program that into the map

DIY is OK, but:
a) you'll find it very hard to detect maximum power so won't know how close or far you are from it
b) people say that you should increase the advance until you hear pinking and then back it off - but if its a competition XE, you'll never hear it....
c) ...and you risk overheating at best/blowing holes in pistons at worse
d) you probably don't know the black magic that the RR operator knows for the non-constant rpm cases, so you won't get the best map you can

Tom · Post by **Tom** » Fri Jul 27, 2007 4:54 pm

oh yes some pics

she's not a competition car, just a toy that'll take me up the strip, round the track or even to tesco's for the weekly shop

I want it performing at its best but keep it driveable you know.

I need to know how to use the mjlj because i'm one of those peeps that took my toys apart as a kid just to see how it works

i'll have a play and see how it goes

fragged8 · Post by **fragged8** » Mon Jul 30, 2007 9:54 pm

hi
I never been into fords but she looks sweeeeeeet

your own work ?

fragged

Tom · Post by **Tom** » Tue Jul 31, 2007 8:59 pm

Yes mate i don't think i'll ever pay someone to do anything that i can take a crack at. She came off the road 7 months ago for the engine change and ended up having a completley new front end

a friend of mine designed the meXEco decals for me, i think he did a to job

capri_turbo · Post by **capri_turbo** » Wed Aug 01, 2007 7:55 am

stunning.

Love the meXEco badging. There's a red MK2 not far from me with "RS3500" badging.

Tom · Post by **Tom** » Sat Nov 10, 2007 6:10 pm

Hi, back to my original post - i was watching the screen whilst driving the other day and noticed the red box in the config map only moves around the in the first 2 lines of my map. surely it should do more than this?

Regarding the load bins - do i need to change these or does the TPS calibration sort all that out for you?

Thanks, Tom

MartinM · Post by **MartinM** » Sat Nov 10, 2007 7:25 pm

Yes, it should do more if you are driving between zero and full throttle, and you are properly calibrated.

Have you done a 'calibrate TPS' and do your load bins go from 0 to 100?

Tom · Post by **Tom** » Sun Nov 11, 2007 11:01 am

Yeah i've calibrated it and the TPS gauge works from 0-100%. The map i'm using is one i pinched from here, slightly modified, and the load bins go from 48 to 230. Shall i change that to 0 - 100?

Just realised do the load bins go up as a percentage? i.e first bin 10% up to the last bin at 100%

Just looking at the base map that was originally on the MJ the load bins go from 20 - 230 what is this measurment?

oh my brain hurts

MartinM · Post by **MartinM** » Sun Nov 11, 2007 12:48 pm

Yes - the load bins should go from 0 to 100 for a 'calibated TPS' installation - either every 10% or whatever you want to get maximum accuracy.

But be careful of taking 'any old map' and setting the load bins to every 10% - overall, you need to end up with the right map for your engine

Other maps that go from say 20 to 230 could be:
- 'old style' TPS maps where throttle calibration wasn't possible and you had to work on a 0 to 255 scale
- MAP maps for turbo engines

Tom · Post by **Tom** » Sun Nov 11, 2007 1:40 pm

gotcha.

i'm using this map

userOutType1=1
revLimit=77
userOutType0=1
rpmBins=5,10,15,20,30,40,50,60,70,75
advance9=11,12,15,16,20,21,25,28,29,29
advance8=15,15,16,17,18,20,24,28,31,30
advance7=15,15,16,17,19,21,25,28,31,31
advance6=15,15,16,17,20,22,26,28,31,31
advance5=15,15,16,17,21,22,25,28,32,32
advance4=15,15,16,17,22,23,27,30,34,34
advance3=15,15,16,17,22,25,28,31,35,35
mapBins=48,70,90,110,130,150,170,190,210,230
advance2=16,15,16,17,22,26,29,32,38,38
advance1=16,14,15,17,22,26,30,32,40,40
advance0=16,13,15,20,22,26,31,32,40,43
cylinders=4
userOutMode3=1
userOutMode2=0
userOutMode1=0
userOutMode0=0
shiftLight=70
userOutValue3=5
userOutValue2=60
userOutValue1=50
userOutType3=1
userOutValue0=40
userOutType2=1

but i've changed the rpm bins to start at 1000 and knocked a bit of advance off as the exhaust manifold was running really hot.
This one was 48-248 on the load bins and i've changed it to 10-100%, have i done the right thing in this or should i just reload the base map that i got from Brent that was already set 10-100% on the load side?

Sorry i keep asking it just makes me worry that i'll kill the engine on a long run

Cheers mate i appreciate the help

Just noticed the attachment bit - here's my map but now i've changed the load sites

MartinM · Post by **MartinM** » Sun Nov 11, 2007 2:06 pm

I can't really advise from my keyboard, or be responsible, for the best map for your engine

...

..but I do have a map from a RR for a highly tuned 2.0XE on twin 45s in a Mk II Escort. But it's 2D only, so all the rows in the map are the same:

Code: Select all

rpm  advance
1000    10
1700    14
2500    19
3000    23
3500    27
4000    31
4500    33
5000    33
5500    33
8500    33

..and it's quite a bit different to yours - much less advance at idling and quite a bit more at mid-rpm - which doesn't mean much of course...

The best suggestions are:
a) be careful, especially if you are not sure what you are doing (changing advance based on exhaust manifold temp is a bit hit'n'miss I would say)
b) get on a rolling road asap - you've got a great car and engine and it deserves setting up properly.

Cheers
Martin

Tom · Post by **Tom** » Sun Nov 11, 2007 4:55 pm

Yeah i'm gonna get down to the RR as soon as i can afford it. I wasn't going by the exhaust temp it's just the exhaust (wrapped) was blistering the paint on the inner wing and i checked everything, Lambda, carb balance, cam timing etc and then opted to knock off some timing and that helped it a lot.

Now i've changed the load bins and have full use of the whole map i think it should run better - I've set up my Lambda reader and limited the timing to 36 at any point as a safeguard and will keep a close eye on it all tomorrow whilst i'm driving