Second Opinion Please

[rmaddock]

I have been trying to work out an advance map for my LandRover - I haven't actually got MJLJ installed yet but I like to think in advance.

The figures I've come up with seem high compared with other maps given here so I thought I'd submit my numbers for a second opinion (or two).

Okay, the facts are as follows:

I have a basic, static timing of:
<b>3 deg BTDC.</b>

My workshop manual tells me that:
<b>vacuum advance starts at 102mm HG</b>
<b>vacuum advance max is 12 deg at 457mm HG</b>

Then, centrifugal advance is given as follows:
<b>38 to 42 deg at 4500 rpm
30 to 34 deg at 3500 rpm
22 to 26 deg at 2500 rpm
12 to 16 deg at 1200 rpm
4 to 12 deg at 900 rpm
0 to 4 deg at 600 rpm
no advance below 450 rpm</b>

Idle speed is:
<b>500 rpm (always feels horribly slow to me)</b>

Rev limit is:
<b>4500 rpm</b>

I have assumed that the figure required by MJLJ at a given rpm is static timing + vacuum advance + centrifugal advance.

Here's the MJLJ config:

#Ignition Configuration for MegaJoltLite Jr.
#Fri Jan 13 14:31:42 GMT 2006
userOutType1=1
revLimit=50
userOutType0=1
rpmBins=5,9,10,15,20,25,30,35,40,45
advance9=18,26,30,34,38,42,46,50,54,58
advance8=17,25,29,33,37,41,45,49,53,57
advance7=16,24,28,32,36,40,44,48,52,56
advance6=15,23,27,31,35,39,43,47,51,55
advance5=13,21,25,29,33,37,41,45,49,53
advance4=11,19,23,27,31,35,39,43,47,51
advance3=9,17,21,25,29,33,37,41,45,49
mapBins=0,13,19,25,31,37,43,49,55,61
advance2=8,16,20,24,28,32,36,40,44,48
advance1=7,15,19,23,27,31,35,39,43,47
advance0=3,11,15,19,23,27,31,35,39,43
cylinders=4
userOutMode3=0
userOutMode2=0
userOutMode1=0
userOutMode0=0
shiftLight=50
userOutValue3=50
userOutValue2=50
userOutValue1=50
userOutType3=1
userOutValue0=50
userOutType2=1


.....I'd be gratefull for any pointers.

Cheers!