Thread: Timing Advance Processor

Originally Posted by Utemad

Hi Peter,

The vapouriser is a Landi LSE98.

The advance set by the distributor is 10d BTDC. The TDC mark is spot on as I have checked it before.

The ignition advance unit when set at 12d (to give a total of 22d). I have dropped this back to give a total of 16d and it still gives grief. The only way I can get it to idle without doing the revs dropping out and being unsettled is to disconnect the unit and short the coil wires together (using the supplied dummy plug).

The unit has 6 switches. 1 & 2 set the advance to set in either all the time or only above 1100g/m. Switches 3 to 6 set the advance amount. For a 4 cylinder it is 3, 6, 12, 24 (these can be added together). So should be 1/2 those amounts for an 8 cylinder.

I am assuming that total advance is not affected. Just initial advance. This is just a guess though as I cannot find any information on this or any other unit like it.

As I've said it runs fairly well above idle but just will not idle properly.

G`day Justin , as i say i know little and can`t be any real help .

I`d agree with 10 and 12 making 22 which is giving 22 initial then the mech advance figure should be added i would think because the unit has no control over it .
So i would expect it has 12 on top of what is normal which will be higher again at times when the vac advance works .

The reason i think this is because units i am aware of will give a figure for initial advance or lower revs and/or their total advance but never give a figure for higher revs which need to be lower or retarded for lpg and never a mention of either mech or vac adv .

My understanding of how the unit works may well be wrong .

It may be that the unit limits the amount of degrees of advance and takes into account the other 2 advances but i`m yet to find a clear understanding of how the units actually work .

This is probably no help as it`s a later model .

ABE 256N Wolf , 6 micros , 4 sections .

.............................
1+2 On = 8 cyls
........................

3+4 On = 15 deg

3+4 Off = 12 deg

3 On 4 Off = 6 deg

3 Off 4 On = 9 deg
.............................

5 Off = Adv always
5 On = No idle Adv
...........................

6 Off = Adv in deceleration
6 On = No Adv in decel from 2100 to 1000 rpm .
.....................................

Cheers

Thanks PLR. That is for the newer model as you say. Different to this one.

I have a mate in Italy and he is going to look for info on the Landi LSE98 for me. That will help me understand the mixture side of things. Then I will see what he can find out on this Wolf 526.