Purplexing dyno results
Stellar HDF Member
Joined: Sep 2007
Posts: 2,434
Likes: 658
From: Vancouver Island B.C.
Were the SERT falls short is pretty much having to rely on an HD dealer to install the maps. I simply want some freedom. The trade off might be worth it if I can get enough torque at cruising speeds out of my system. If not, I'll need to find a Harely dealer with a better performance person than my local shop has to properly set up my SERT and I'll simply sell the PCV. I decided the experiment is worth it.
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Cruiser
Joined: Aug 2010
Posts: 163
Likes: 0
From: Bismarck, ND
I have to agree, but the shortfall is not the SERT but the shortage of people that know how to use it. Like harley tuner says the "canned" PC maps will not work so well with the SERT map that is installed. The autotune would help. Is there not an indy close that is proficient with a dyno? Anyone that can use a tuning a SESPT, TTS or Directlink should be able to tune the SERT. The recipe is the same, it's just the tool that is a little different. Looking at your original post if your bike is an '09 I would bet that your tuning device is actually a SESPT. Does it have a red button in it? If so you also have the option of running a smartune on it yourself, which might help.
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Cruiser
Joined: Aug 2010
Posts: 163
Likes: 0
From: Bismarck, ND
Make sure its a SERT and not the SESPT (Screamin' Eagle Street Performance Tuner) http://www.harley-davidson.com/gma/g...bmLocale=en_US
When a buddy of mine bought his bike he was told it had the race tuner and he showed me the orange case from his saddle bag. It said right on the case "Street Performance Tuner ", not the same as the race tuner.
When a buddy of mine bought his bike he was told it had the race tuner and he showed me the orange case from his saddle bag. It said right on the case "Street Performance Tuner ", not the same as the race tuner.
Banned
Joined: Sep 2009
Posts: 7,580
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From: The Internet (& Dyer, Indiana)
The guy doing my big bore kit has said that he can write a map for the SERT but I would need the Harley dealer to install that map. I don't really understand that stuff enough yet to know why. We have access to a dyno. Anyway, my SERT or SESPT does not have a red button on it. In fact, it says screaming eagle on it and nothing else. The little box it came in has a number on it that does not google well. I don't have it in my hands at the moment. I did talk to the dealer in Rice Lake, MN that originally installed it. He called it a race tuner. I'm pretty new to this stuff. Never messed with that on my gold wing. There is torque and hp out the a** on those as is. So now I don't know if I have the SERT or the SESPT. Interesting.
The problem is, it needs to be fine tuned with a dyno and exhaust sniffer to get any decent results. What you are suggesting is no better than getting a "canned map" from somebody on the internet.
In your shoes (after the build is complete), I would be putting effort into searching out a good tuner with some feedback to back his rep. Even if I had to travel a few hours. It is so worth the effort.
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Cruiser
Joined: Aug 2010
Posts: 163
Likes: 0
From: Bismarck, ND
The SERT isn't removable, since it is never "installed". The SERT is just a communication interface that allows the user to make adjustment to the ECM. Once a user writes a MAP with the SERT it is stored in the ECM on the bike and the SERT is unplugged. So even if you install a PCV the MAP on the bike is still going to be the tuned MAP from the SERT. You could take your bike to a dealer and have them re-flash your ECM to stock, or you could leave it the way it is. As long as you have your PCV dyno tuned or run the autotune you would be fine to leave it. Since you already have the SERT and you can't sell it (it's married to the ECM on your bike) why not have the SERT tuned to your build? You caould still use the PCV with autotune, the PCV has the ability to run 2 MAPS via a switch. You could have one MAP run on autotune and the other set to all zeros and run the SERT MAP, maybe have that MAP tuned lean and run it when your in traffic and the bike is hot.
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Cruiser
Joined: Aug 2010
Posts: 163
Likes: 0
From: Bismarck, ND
How exactly would I access a SERT with my computer? I don't believe I can. The Power Commander yes, the SERT, no. Cause if I can install a map myself on the SERT, then I've been mislead.
Banned
Joined: Sep 2009
Posts: 7,580
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From: The Internet (& Dyer, Indiana)
Do you have cables with your sert? If not, you'll need to buy some.
I've done it at home several times, when playing with minor changes.
The only thing different with a SERT, is that you can not upload the map from your bike to the computer (like you can with Power Commander).
You have to have a copy of your original map before doing anything, give it a new name when you make changes to the map (so you can revert to the original map).
If you get serious about playing with it, and can't find software on the net, shoot me a PM and I'll mail you a copy. I'm pretty sure it can be found on the net though.
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Thread Starter
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Cruiser
Joined: Aug 2010
Posts: 163
Likes: 0
From: Bismarck, ND
All you need is the software and a serial port.
Do you have cables with your sert? If not, you'll need to buy some.
I've done it at home several times, when playing with minor changes.
The only thing different with a SERT, is that you can not upload the map from your bike to the computer (like you can with Power Commander).
You have to have a copy of your original map before doing anything, give it a new name when you make changes to the map (so you can revert to the original map).
If you get serious about playing with it, and can't find software on the net, shoot me a PM and I'll mail you a copy. I'm pretty sure it can be found on the net though.
Do you have cables with your sert? If not, you'll need to buy some.
I've done it at home several times, when playing with minor changes.
The only thing different with a SERT, is that you can not upload the map from your bike to the computer (like you can with Power Commander).
You have to have a copy of your original map before doing anything, give it a new name when you make changes to the map (so you can revert to the original map).
If you get serious about playing with it, and can't find software on the net, shoot me a PM and I'll mail you a copy. I'm pretty sure it can be found on the net though.
Banned
Joined: Sep 2009
Posts: 7,580
Likes: 7
From: The Internet (& Dyer, Indiana)
Personally, I always get that question in before allowing someone to tune. I know that wasn't an option for you.