PCV with Auto Tune
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Cruiser
Joined: Apr 2009
Posts: 226
Likes: 8
From: Creola, AL.
PCV with Auto Tune
Who has done this, and what are the benefits? It is pricey, and the oxygen sensors are big and bulky. So far I have not been able to justify this in my mind. I would be interested in any comments people have.
Road Warrior
Joined: Jul 2007
Posts: 1,462
Likes: 22
From: Delaware
Its not much more money for the Autotune. I like to have the piece of mind that the PCV is constantly keeping the front and rear cyl. at optimum levels independently of each other. I had it dynoed at the dealer after I installed it and they said its neat to watch the autotune work and keep the bike at optimum levels. It is also good if you add performance parts like big bore kits and cams. I havent paid much attention but they say it will optimize your fuel mileage.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
If you bought a PCV from Fuel Moto with one of their maps I wouldn't invest in AT unless the above conditions exist.
senior experienced all-knowing leader of the unwise
Joined: Apr 2008
Posts: 1,957
Likes: 351
From: USA
I was faced with dyno tuning mine because i had cams and 103". Not much difference in buying the auto-tune. Glad i did. You can have all your power and if you know how to set AFR you can get your mileage too.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
The good thing about the PCV is that you can also add a switch that will allow you to toggle between AT (closed-loop) mode and the base map (open-loop). I have Fuel Moto's richer base map with lean AFR's in the cruise range, so AT trims to those settings. Thus, if things get too hot like in summer traffic I can switch AT off and run on the richer base map to keep things cooler. The system works very well for me, but I think most people would be very happy with just the basic PCV with a good map.
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Cruiser
Joined: Apr 2009
Posts: 226
Likes: 8
From: Creola, AL.
I guess there is something I don't understand about AT. You talk about settings? I thought AT made the adjustments for you depending on your conditions. I can adjust my PCV already so why would I need AT.
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Cruiser
Joined: Jun 2008
Posts: 223
Likes: 0
From: NORCAL CENTRAL VALLEY
Auto Tune adjusts the AFR on the fly as you ride, to the AFR you set in the map. It "trims" the base map +or- to get the desired AFR in each cell then you can choose to save the trims to the base map or allow the AT to work as a "separate" map.
Thread Starter
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Cruiser
Joined: Apr 2009
Posts: 226
Likes: 8
From: Creola, AL.
From what's been said here I not convinced that extra money for AT is worth it for me. I'm running a stock 96 with stock cams. All I'm running is the equivalent of a Stage 1 upgrade. It doesn't sound like AT will do much for me.