ignition table
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- MS/Extra Newbie
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ignition table
Hi,
So i started with tuning the ignition table of the GX31, How should i proceed to increase the power and torque of the engine? Basically it seems like the more the advance the more torque, almost in the limit of detonation. But i also know that its not always that limit that is the most optimized point. So this engine as a standard ignition advance of 27 degrees, and i was generating a initial spark advance table on the web and it gives me values way bellow the 27 degrees. Does it make sense to use them? or it doesnt make sense to put values on the table bellow 27 degrees?
Regards
So i started with tuning the ignition table of the GX31, How should i proceed to increase the power and torque of the engine? Basically it seems like the more the advance the more torque, almost in the limit of detonation. But i also know that its not always that limit that is the most optimized point. So this engine as a standard ignition advance of 27 degrees, and i was generating a initial spark advance table on the web and it gives me values way bellow the 27 degrees. Does it make sense to use them? or it doesnt make sense to put values on the table bellow 27 degrees?
Regards
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- Super MS/Extra'er
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Re: ignition table
Empirically.
Put it on an engine dyno and see where it makes the most torque.
Put it on an engine dyno and see where it makes the most torque.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
Re: ignition table
Is it a Honda GX31 engine?
1985 Dodge Omni GLH Turbo MicroSquirted 367whp http://www.msextra.com/forums/viewtopic ... 04&t=67324
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- MS/Extra Newbie
- Posts: 15
- Joined: Mon Sep 18, 2017 3:51 am
Re: ignition table
Yes it is. Before with the magnet ignition it went until 5800 rpm, with full throttle. Now with the electronic ignition doesnt even exceed the 4200 rpm.tryingbe wrote:Is it a Honda GX31 engine?
Re: ignition table
27 degrees fixed timing does look like a lot to me for such a small engine.
I would check the timing with the magneto at various rpms.
Use those timings to make a base table.
If that's not possible I would use the ignition timing generator values.
I would check the timing with the magneto at various rpms.
Use those timings to make a base table.
If that's not possible I would use the ignition timing generator values.
Re: ignition table
1985 Dodge Omni GLH Turbo MicroSquirted 367whp http://www.msextra.com/forums/viewtopic ... 04&t=67324
Re: ignition table
Considering idle speed is 3,100 +/- 200 rpm, not really. This engine only puts out 1hp.spitnl wrote:27 degrees fixed timing does look like a lot to me for such a small engine.
http://cdn.powerequipment.honda.com/eng ... zm3613.pdf
Last edited by tryingbe on Thu Oct 26, 2017 7:30 am, edited 1 time in total.
1985 Dodge Omni GLH Turbo MicroSquirted 367whp http://www.msextra.com/forums/viewtopic ... 04&t=67324
Re: ignition table
What did you use to generate the table? URL?joaocaleira wrote:i was generating a initial spark advance table on the web and it gives me values way bellow the 27 degrees. Does it make sense to use them? or it doesnt make sense to put values on the table bellow 27 degrees?
This give at least 10 degree more than 27 degree for spark. http://www.useasydocs.com/theory/spktable.htm but it is mainly used for engines with much bigger displacement.
How is the a/f ratio monitored?
How is the knock monitored?
1985 Dodge Omni GLH Turbo MicroSquirted 367whp http://www.msextra.com/forums/viewtopic ... 04&t=67324