X Flow Timing with Aldon ignitor

[Paul Ash]

sorry Tony the one thing that is not on my spec sheet is the info you require. Just what is posted above. I guess you will need to speek to Aldon Automotive 01384 572553

[Tony sei]

Hi Guys,

Tried 16 deg BTDC today and seems a lot better.

Quite tempted to go up to 18 deg and see what

it's like. Until I can get some definite data on the

dizzy max advance.

Suppose I could take it thro' the rev range, checking

timing at each stage and stop if it goes over 36 deg?

(Understand this is the safe max??)

Also found the 103FXYS dizy is similar to the

100FXY. anybody any data (Max Advance) on this

unit.

Cheers

[Buzzer]

the way I sort out the timing on my X-flow (with the Aldon unit) is to set it at max advance, then you know that's right. the way I do it.

1)mark on the flywheel the 36 deg BTDC with a bit of white paint or a file groove in the flywheel and fill with paint. To measure use a crank dial gauge, can be a bit fiddly but worth it. use the current TDC mark as reference (may be worth checking this with a dial gauge while you are at it).

2) then set the timing with the stobe, but instead of 900rpm and 10deg  (or whatever), 4000 rpm and 36 degrees. This should be safe for max advance, but I would check by reving up to 6 to see if it advances further, note this rpm and then set at 36 degrees BTDC.

hope this helps

Dave

[worzel]

Update....

Yesterday I spent some time fiddling with my dizzy and setting it up as previously posted ie 20 BTDC @ idle and 36 BTDC full advance.  I have read and been advised that the maximum advance (36 deg BTDC) should be acheived at around 3500 RPM, and I've set mine to this.

Wow what a difference

Before modifying the distributor, the engine had a bad misfire and was running rich below 3000 RPM.  Throttle response was very poor too.  Lets just say it was no fun to drive below 3000 RPM.  

Since the above mods to the dizzy, the engine sounds crisper (if YKWIM?), runs very sweetly at idle and at all RPMs.  My misfire has gone and CO is slightly reduced.  It's a joy to drive

My only concern is that it may be a pig to start from cold due to 20 deg BTDC advance.  If it is I'll reduce it to say 16 or 18 and I'll then have to modify the dizzy again to retain a maximum advance of 36 Deg BTDC.  We shall see

Whatever you do, make sure that 36 deg BTDC full advance is not exceeded as the engine will soon expire

Steve

[davef]

Hi Tony just to add to my previous message, you must make sure you reduce the advance curve in the dizzy before going upto 20 degrees btdc, i did this by having metal added to the bob weights to reduce the throw out which in turn reduces the amount of advance movement, it,s a bit fiddley but worth it. if it stuggles to start buy a bigger amp hour battery.cheers davef.