When is an ignition module necessary?
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Intermediate
Joined: Jun 2016
Posts: 35
Likes: 1
From: Seattle WA
When is an ignition module necessary?
I’ve got a 2000 carbureted bagger that I’m getting ready to do a 95 upgrades. I’m curious as to when is an ignition module needed? Like above what compression etc?
Thanks!
Thanks!
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,071
Likes: 1,006
shouldn't need to. you might get into an ign issue if the compression is wild or you have issues with chamber design that causes weird turbulence. as far as cu/in, never seen an issue, we had engines where you could stand in the bore and yet running really out dated systems.
now if you want to control each cyl, then they have that available but for a street machine, over-kill.
now if you want to control each cyl, then they have that available but for a street machine, over-kill.
Grand HDF Member
Joined: May 2014
Posts: 3,844
Likes: 1,174
From: florida
if you are going to go 10-1 or more, you should get a programmable ignition module, especially if the fuel quality in the area you plan to ride in or around is questionable.9.5-10-1 i would still say to do it,,,,but base it on your target goals for the build,,,if you are going to stay in the 9-9.5 and not anything crazy cam wise, you could probably be ok, but I like to have the necessary control available to me if it ever becomes needed,,,,so if you think you might improve it later, go ahead and get it now. The Daytona Twin Tech products or Dyna 2000 work very well.
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Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
I go with anytime any ignition curve besides stock is needed. I don't care too much about static compression. Corrected and dynamic concerns me more.
The stock cam closes at 38 and has no overlap. A low compression bolt in like a Andrews 26 closes at 35 and has 20 degrees of overlap. Both will require different timing curves.
The stock cam closes at 38 and has no overlap. A low compression bolt in like a Andrews 26 closes at 35 and has 20 degrees of overlap. Both will require different timing curves.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
What you will find is that a stock ignition module has an EPA friendly timing curve, rather than an optimum one. So my reply is that if you are making any mods to your bike, to improve performance, regardless of CR, then an aftermarket module is a good idea. Your bike will run with either, but an aftermarket one will give better results.
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Jox818
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