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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #1  
Old 21st April 2010
joesquid joesquid is offline
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Default 883-1200 conversion ignition module?

Howdy All,
I recently performed a 883 to 1200 conversion on my 2002 Sportster. Here is what I used:

HD 1200 Cylinders 16463-04
Screaming Eagle Heads 16677-05
Screaming Eagle domed pistons
Screaming Eagle pushrods 18424-06 (specifically designed for the 16677-05)
Screaming Eagle cam set 25648-01

I'm still using the original 883 ignition module and have been having problems with pinging regardless of how I set the timing (using minimum of 91 octane fuel). A good friend told me I needed to upgrade the ignition module because the spark curve wouldn't be adequate for my conversion. He thought an 883 Race ignition module would work but they aren't made anymore as far as I can tell.

Does anyone have any ideas what kind of module I should go with? Would I also need to upgrade from the original ignition coil as well?

Thanks for the help!

Eric "JoeSquid" Johnson
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  #2  
Old 21st April 2010
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NC_REDNECK_1981 NC_REDNECK_1981 is offline
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i use the ultima programmable ignition, its made by daytona. http://www.ultimaproducts.com/programmableignition.html

i used my se dual fire coil instead of the one that comes with it,and i love it
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  #3  
Old 21st April 2010
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I'm in the middle of my conversion and had received mixed feedback on using the stock 883 ignition. I wanted to do the build on the cheep and didn't want to spend 150 on an ignition so I picked up a stock 1200 ignition instead. I don't have it all back together yet but I hope not to have the issue you're having. Definately can't go wrong with the above advice though.
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  #4  
Old 21st April 2010
joesquid joesquid is offline
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Redneck,
Thanks for the info. The kit you showed me is a programmable style and my Sporty is carbeurated. I don't think that one will work on my bike. I did look at the single fire set up which states it will work on the carbeurated Sporties. Would I be able to use an SE dual-fire ignition coil with that module?
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  #5  
Old 21st April 2010
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Quote:
Originally Posted by joesquid View Post
Redneck,
Thanks for the info. The kit you showed me is a programmable style and my Sporty is carbeurated. I don't think that one will work on my bike. I did look at the single fire set up which states it will work on the carbeurated Sporties. Would I be able to use an SE dual-fire ignition coil with that module?
it will work on your bike even if its programmable.

you can also go with the DAYTONA TWIN TEC ignition module #1005.. Very reliable and much better then stock.

You need to change the ignition when you convert. the stock 883 is set to 35 degrees advance, the 1200 is at 28 degrees.
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  #6  
Old 21st April 2010
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i put that kit on my 88 sporty and it has a carb. i have not had any problems with it at all. it has a dip switch that lets you switch between single and dual fire depending on what you prefer. i am going to use the same ignition on my ironhead when i finish putting it together.
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  #7  
Old 16th May 2010
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Hi everybody,
I'm having a very similar question -
883/1200 conversion on a 2001 XL, I bought the so-called "J-curve" ignition original P/N 32432-91A which should fit 88-90 sportsters (and up with the 7- to 8-pin adaptor, which I've also purchased). Buzz Buzzelli wrote this one would be preferred by a lot of engine techs because of its perfect advance for a 1200, but now a read this module is originally designed for a 4-speed engine, not 5. Can I still install it?
Any helpful statements appreciated!

I'll make this a thread of its own as it is becoming a major compatibility issue.
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  #8  
Old 17th May 2010
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just completed the 883 to 1250 conversion a few weeks ago. at the advice of the folks i bought it from and since all i did was just change out cylinders and pistons, no head work, i picked up a stock 1200 module for 30 bucks used. no pinging and all is running well.
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  #9  
Old 1st September 2010
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I am trying to fit the daytona 1005 in my 1988 converted to 1200.
Unfortunately, when I am trying to tune it with the red LED, the housing for the bolts are on the way (there are on a vertical line, one above the other) and so I cannot get the light to lit or stop when front piston is at TDC.
the 2 bolts should be in an horizontal line in order to tune properly.
Am I doing something wrong?
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