I have an 03 dyna low rider with a 95" big bore, Andrews 37G gear cams, slip on and air breather. I have no idea what the po has done other than this. Took it out and it ran REALLY HARD. It pulled exceptionally hard. Then the check engine light came on. took in to dealer and the ignition module was fried. found out it was a 7,000 rpm screamin eagle race module. they replaced it with a stock. now I'm wondering how it will run?? I'll get the part number. i can't find a new or used one anywhere like it. I'm not sure where the power band is. not sure of compression or any head mods . Any suggestions please. Had on dyna forum 3 days wit 0 response.

 

32720-99 is the Screamin Eagle ignition module that went bad.

 

The screaming Eagle ignition module just controls the rev limit. These are usually installed on high performance motors and are often paired with high intensity coils. It is also smart to have a tachometer on bikes with high-performance rev limiters to monitor your RPM's. Your fried module raised the rev limit to 7000 RPM. The stock module is probably half that. The thing to consider is what RPM you ride and shift at. If you shift or ride around 2500 - 3500 RPM more than 50% of the time then I would not worry about the stock ignition module. If you race the bike or operate at higher RPM's then you should look into getting a new module. If you want what you had before EBAY is a good place to look.

 

Does the module change the ignition curve also? I thought I read that somewhere. I looked on Ebay. none of that model. didn't know what other module would work. Anyone know the stock rpm limit? 5600?

 

Better of getting something like this especially if you don't know what pistons are in there as cast pistons should not be spun up to 7000 RPM. 6200 RPM is high enough for cast unless you know that you have forged.
http://www.ebay.com/itm/2000-Harley-...50b90c&vxp=mtr

Or go aftermarket
http://www.daytona-twintec.com/TC88.html

 

Ok, here's what you do.... Take a compression test and see what you have for cold cranking pressure, ccp, The cam that you have is a mediocre cam that likes 9.5:1 compression so if your in the 180 -190 ccp range you wont have to worry about any specific ignition. I'm sure the stock one is all you need. It will work just fine. don't worry about it and ride sensibly....

 

I took it for a ride today. It was nice enough to put a few miles on. (43 degrees). It ran great!....up to about 5500. then it was done. Last time I drove it, it pulled well past 6000. I don't want to Rev past 6000 really. But I was disappointed when it went flat all the sudden at 55. I think I will do the comp check just for the heck of it and order a higher rev.

 

As in hit the rev limiter?

 

Yes, as in hit the rev limiter. sorry for being unclear. I was almost ready to shift but not quite.... 6000 rpm would be great!

 

A stock ignition does indeed use a modest advance curve, to help the bike meet EPA regulations. The SE module provides an optimum advance curve, which should give improved performance, as well as a higher rev limit. There are aftermarket ignition modules available that will be better than the stock one and give you back your bike's mojo.