Another MAP question
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Road Warrior
Joined: Apr 2010
Posts: 1,542
Likes: 5
From: Cleveland, OH
Another MAP question
I apologize if this has been asked, but I'm not seeing it anywhere... I'm going to add a SE stage 1 AC to the SEII slip ons. I'm thinking about having my dealer just do a simple download for the ECM. I know that from the factory they tend to run on the leaner side. Can I expect it to still run kind of lean after the download? I don't plan on doing anything else to the engine on this bike so the SE tuner and dyno time is way too expensive to only use it once. And I would rather not have to try and stuff a Fuelpak into my bike. Thanks!
Outstanding HDF Member
Joined: Dec 2010
Posts: 2,036
Likes: 8
From: Temecula, CA
It will still run at the same AFR as it does now. From what I'm hearing the Stage 1 download really doesn't change this any as it still is EPA compliant. There is some debate as to whether or not you even need to do a Fuel Pack after a stage 1 ac and slip ons. However, if you don't the bike will run just as lean as it does now...just won't get any worse.
A dyno WOULD get you the most power out of your setup even with a stage 1 setup. However, most folks don't feel that it's worth the money to do a dyno tune on a stage 1 bike since the aftermarket tuning solutions get them close enough. I wouldn't waste your money on the Dealer stage 1 download as it gives you no real benefits that the stock ECM probably can't compensate for anyway. To get a bit more performance out of your bike, I'd go with a Fuelpak. I know you don't want to, but something like that (or a PCV, etc) would be a better use of funds than the dealer download.
A dyno WOULD get you the most power out of your setup even with a stage 1 setup. However, most folks don't feel that it's worth the money to do a dyno tune on a stage 1 bike since the aftermarket tuning solutions get them close enough. I wouldn't waste your money on the Dealer stage 1 download as it gives you no real benefits that the stock ECM probably can't compensate for anyway. To get a bit more performance out of your bike, I'd go with a Fuelpak. I know you don't want to, but something like that (or a PCV, etc) would be a better use of funds than the dealer download.
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Road Warrior
Joined: Apr 2010
Posts: 1,542
Likes: 5
From: Cleveland, OH
My understanding is that the ECM cannot compensate when you have both the SE slip ons and intake and so the MAP download would allow it to do so. I just didn't want to mess with installing a fuelpak which sounds like a real pain in the butt to cram into a sportster. My other concern is the warranty if something were to happen. If they do the download, and something happens, I would like to think Harley would be to blame. I know a race tuner with dyno time is probably the best in the end, but I'm just not interested in investing that kind of cash into a sporty. Maybe I'll have to consider just leaving it alone and learn to love the occasional hiccups and popping.
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