Ignition Timing on 1000J

  • MJinCO
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Ignition Timing on 1000J

07 Jan 2026 09:08
#920399
I am never below 5000ft elevation.  For a car it typically helps to advance the ignition 1 degree for every 1000 ft mol.  Is there any way to advance the ignition 4 t or 5 degrees with the 1000J electronic ignition?

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  • Wookie58
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Re: Ignition Timing on 1000J

07 Jan 2026 09:32
#920402
I am never below 5000ft elevation.  For a car it typically helps to advance the ignition 1 degree for every 1000 ft mol.  Is there any way to advance the ignition 4 t or 5 degrees with the 1000J electronic ignition?
You could cut slots where the mounting screws are in the plate with the pick up coils ?

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Re: Ignition Timing on 1000J

07 Jan 2026 14:16
#920409
I suspected as much, I'll think bout it.

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  • SWest
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Re: Ignition Timing on 1000J

07 Jan 2026 20:36 - 07 Jan 2026 20:39
#920411
How about leaning out the fuel screws. 
Last edit: 07 Jan 2026 20:39 by SWest.

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Re: Ignition Timing on 1000J

08 Jan 2026 06:44
#920419
Given I'm using the cone filters and headers adjusting the fuel is already done.  I have bench balanced the carbs, but since I can get to everything when the motor is running I'm going to get a Unisyn  air flow checker to check it while running.  I contacted Dyna and they say their timing pate is adjustable.  It could be trial and errored into the best position by slightly changing the crank position then rotating the plate to get a spark, but I don't know of any way to put numbers to that.

I have noticed the carbs not being to happy in turns due to the fuel sloshing around due to the g load and the motor staying horizontal rather than leaning as on a bike..  The flat slide carbs would probably take care of that , but I'm not too interested in the expense and  a MOL 6'long push/pull throttle cable is a bit daunting as I couldn't find anyone to make me a standard one  using the Kawasaki turn fitting at the carbs and had to fab my own. splicing a stock cable into a custom made extension to the throttle pedal. Actually a lot easier done than it sounds.. A super heavy throttle return spring might do it but it could get to be an expensive experiment.  

I'm an old, slow driver and this is my toy car and I'm still trying to get the motor and oil cooled properly, more the engineering type than  driver.. One of my current projects is learning to weld aluminum as I have a new fuel cell and it has to be in either a .062 aluminum or .048 steel case and all the fuel cell folks seem to be forever booked as many airplanes use fuel cells.
 

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Re: Ignition Timing on 1000J

08 Jan 2026 07:52 - 08 Jan 2026 07:56
#920423
Given I'm using the cone filters and headers adjusting the fuel is already done.  I have bench balanced the carbs, but since I can get to everything when the motor is running I'm going to get a Unisyn  air flow checker to check it while running.  I contacted Dyna and they say their timing pate is adjustable.  It could be trial and errored into the best position by slightly changing the crank position then rotating the plate to get a spark, but I don't know of any way to put numbers to that. If you use an adjustable timing light you can dial in to the TDC mark and read your timing value from the display on the light

I have noticed the carbs not being to happy in turns due to the fuel sloshing around due to the g load and the motor staying horizontal rather than leaning as on a bike..  The flat slide carbs would probably take care of that  - Are you using a fuel pump ? carb cars don't generally suffer from this and have conventional float set ups - is it worth installing a "swirl chamber" in the supply line if the pump is not picking up ? I guess alternatively if you are creative you could run Webber DCOE carbs in your installation  (DCOE 40's with 34mm chokes should work)?, but I'm not too interested in the expense and  a MOL 6'long push/pull throttle cable is a bit daunting as I couldn't find anyone to make me a standard one  using the Kawasaki turn fitting at the carbs and had to fab my own. splicing a stock cable into a custom made extension to the throttle pedal. Actually a lot easier done than it sounds.. A super heavy throttle return spring might do it but it could get to be an expensive experiment.  

I'm an old, slow driver and this is my toy car and I'm still trying to get the motor and oil cooled properly, more the engineering type than  driver.. One of my current projects is learning to weld aluminum as I have a new fuel cell and it has to be in either a .062 aluminum or .048 steel case and all the fuel cell folks seem to be forever booked as many airplanes use fuel cells.


 
Last edit: 08 Jan 2026 07:56 by Wookie58.

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