New Cams do i need ECU remapped?
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Intermediate
Joined: Aug 2010
Posts: 33
Likes: 0
From: NW Montana
New Cams do i need ECU remapped?
Down at the local Harley dealer today setting up an appointment to have some Andrews 37g cams put in my 05 Ultra. My bike has S/E pipes and high flow air filter with the stage one download. I would think that the ECU would need to be remapped with the new cams but the guy at the Harley dealer said no it didn't. So I ask all you fine folks that know more than me. Is the guy at the Harley dealer full of $hit or am I?
Thanks
Charlie
Thanks
Charlie
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
NO I wouldn't even only remap either, I'd get her dyno tuned to make her run at her peak.
Why spend all that money on a cam job and not finish it off with a good tune. IMO Ur just wasting $$$ if U don't.
The cams will change most timing events and amount of air going in/out. That needs a good F/M system and a dyno to bring out the best in her.
I'd even think about going somewhere else where they know what the chit they doing to get the work done.
Thinking,,, Is it because they can't dyno tune it.???
Why spend all that money on a cam job and not finish it off with a good tune. IMO Ur just wasting $$$ if U don't.
The cams will change most timing events and amount of air going in/out. That needs a good F/M system and a dyno to bring out the best in her.
I'd even think about going somewhere else where they know what the chit they doing to get the work done.
Thinking,,, Is it because they can't dyno tune it.???
Last edited by oct1949; Jan 22, 2011 at 05:35 AM. Reason: added
Road Master
Joined: May 2005
Posts: 1,121
Likes: 3
From: Mass.
The whole point of changing cams is to get more air into the cylinders. More air is useless without more fuel. So, yea, you need a remap. In the good old days you would add a larger jet to the carb so that the extra air rushing through would draw more fuel.
You might want to consider having someone with a clue working on your bike.
You might want to consider having someone with a clue working on your bike.
Outstanding HDF Member
Joined: Oct 2006
Posts: 2,263
Likes: 36
From: Georgia Mountains
The difference between a 21G and 37G is substantial. I doubt the bike would run properly without a tuner and believe you're getting bad advice from the dealer.
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Road Warrior
Joined: Jan 2008
Posts: 1,446
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From: greenwood, mo
The bike is running lean even with the dealer download put a FM on it and it will not run lean will run alot cooler and better,I have good luck with the PCV
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Intermediate
Joined: Aug 2010
Posts: 33
Likes: 0
From: NW Montana
Thanks guys! I considered getting a PC from fuelmoto, and guess I will just bite the bullet and do it. I kind of figured that, was just looking for some second opinions. The closest Harley shop dyno is 2 hours away. There is a dyno here in town but it is at the yamaha shop, however I do believe they are a PC authorized tuner. Hopefully fuelmoto's map will get me really close and if it needs some tweakin then I will take it in.
Thanks again!
Charlie
Thanks again!
Charlie
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