Is it ok to run Ness Stage II sucker without tuner or reflash - Road Glide Forums
Intake and Exhaust Intake and Exhaust Systems for Road Glides

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 18 (permalink) Old 08-03-2010, 11:30 AM Thread Starter
Life Member
 
DED HD's Avatar
 
Join Date: Jun 2010
Location: Iowa City
Posts: 4,022
Is it ok to run Ness Stage II sucker without tuner or reflash

until i can afford a full exhaust system and Power Commander, can I install my Ness Sucker Stage II Derby Cover Air Cleaner and run stock?
I bought the Derby Sucker Air Cleaner and am wanting to put it on just for looks right now. Will the bike run just like stock even with an open air cleaner and no other mods?

'10 Red Custom:
check out my build thread for pix and mods
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DED HD is offline  
Sponsored Links
Advertisement
 
post #2 of 18 (permalink) Old 08-03-2010, 11:34 AM
Hangaround
 
Join Date: Apr 2010
Posts: 177
What do they say about it? The manufacturer will usually tell you whether or not it needs a tune. You can always mount it and try it out. All the Stage one kits i've seen recommend a tune.
rc74racer is offline  
post #3 of 18 (permalink) Old 08-03-2010, 12:13 PM
Grey beard
 
Join Date: May 2010
Posts: 1,480
Just got this info

You can have your HD guy do a simple stage I tune
Frodoe is offline  
 
post #4 of 18 (permalink) Old 08-03-2010, 01:16 PM Thread Starter
Life Member
 
DED HD's Avatar
 
Join Date: Jun 2010
Location: Iowa City
Posts: 4,022
I understand HD can do a reflash, but i figure with the stock ECU it sort of tunes itself to run at the stock AFR. Basically even though the air cleaner will allow more air, the ECU will not allow it to take in any more until you teach the ECU to do differently. Same with exhaust, you can run a freer flowing exhaust, but without the reflash it will only adjust to run at stock AFR. So no performance will be gained. I figure I would save the money until I can get the exhaust and Power Commander.
Currently i have a nightstick slip on exhaust, but didnt do the HD reflash.

'10 Red Custom:
check out my build thread for pix and mods
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DED HD is offline  
post #5 of 18 (permalink) Old 08-03-2010, 01:50 PM Thread Starter
Life Member
 
DED HD's Avatar
 
Join Date: Jun 2010
Location: Iowa City
Posts: 4,022
Sorry about the picture page here, but i wanted to show the Dyno Chart AN has on the website.
I called them to ask about this chart specifically and it was done with stock exhaust and no reflash of any kind. Simply putting on the Air Cleaner.
They say the bike will run a bit lean, but if you get the Harley recommended reflash after this, you will have to do anther reflash if you put on a full exhaust and Power Commander.
So I got my question answered. Yes you can add the Air Cleaner with no other mods. The bike will run lean, but will gain some added power.



'10 Red Custom:
check out my build thread for pix and mods
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by DED HD; 08-03-2010 at 01:55 PM.
DED HD is offline  
post #6 of 18 (permalink) Old 08-03-2010, 02:45 PM
Hangaround
 
Join Date: Apr 2010
Posts: 177
Your ECU cannot do anything to prevent the intake or exhaust of air. You need more fuel when you add more air this is why you need a tune. Now will it hurt your bike to run an exhaust and intake without this who knows but you should be able to get the dealer to download the stage 1 map to your ECU without it costing too much. Your ecu won't need a flash after you get a power commander that's what the unit does it's a piggy back to the ecu and has it's own maps/tuning that override the ECU. They are right your bike will run lean it runs lean from the factory the add ons will only make it worse.
rc74racer is offline  
post #7 of 18 (permalink) Old 08-03-2010, 03:28 PM Thread Starter
Life Member
 
DED HD's Avatar
 
Join Date: Jun 2010
Location: Iowa City
Posts: 4,022
Thanks for helping me understand this.
So basically I will be allowing more air in than probably the ECU can handle, but i also understand that the 2010s ECU will adjust for proper 14.6/1 AFR (within its limits, Im sure) So perhaps I am allowing more air than the ECU can deal with, so it will not adjust the right amount of fuel, there for the bike will run a little lean.
Am I understanding it correctly now?

'10 Red Custom:
check out my build thread for pix and mods
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DED HD is offline  
post #8 of 18 (permalink) Old 08-03-2010, 04:22 PM
Hangaround
 
Join Date: Apr 2010
Posts: 177
I don't want to misspeak on what the harley ECU does or doesn't do but I didn't think they were self adjusting. If so I don't know why you would need a flash or PC if you were not going need to exceed the limits of your stock o2 sensors. I just know that most bikes base maps are set to run lean in order to meet EPA standards. When you add more air to an already lean running motor that's not good. I know plenty of people running an exhaust on the stock map but no one who is running a stage one kit plus exhaust without the stage one map. I have it on mine and the bike runs really well.
rc74racer is offline  
post #9 of 18 (permalink) Old 08-03-2010, 04:37 PM Thread Starter
Life Member
 
DED HD's Avatar
 
Join Date: Jun 2010
Location: Iowa City
Posts: 4,022
Its a lot to understand... and I have a long long way to go.
I may just have to pony up and get the flash.
But to some extent I believe the bike runs 95% of the time in the Closed loop system which adjusts for proper AFR. Similar to how it will adjust for altitude etc.
I need to sit down and talk with someone to help me explain it.

'10 Red Custom:
check out my build thread for pix and mods
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by DED HD; 08-03-2010 at 05:07 PM.
DED HD is offline  
post #10 of 18 (permalink) Old 08-03-2010, 06:08 PM
Life Member
 
Shrug's Avatar
 
Join Date: Mar 2010
Location: Wills Point, Texas
Posts: 2,202
Garage
Send a message via Yahoo to Shrug
If you're not changing the exhaust, you should be alright with just the Big Sucker. It can try to suck all the air it wants, but if the exhaust is as restrictive as stock, there won't be any increase in the volume of air flow or performance gain.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Shrug - Scott Wilson
2010 FLTRX "Hester 2.0" -
Blue Knights Texas Chapter XLVI
Shrug is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Road Glide Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Arlen Ness Stage II Air Filter Kit VikingRider Do-IT-Yourself 1 04-14-2017 05:25 PM
Screamin Eagle Pro Tuner reflash question RootBeerFXS ECM/Fuel Management systems 6 03-20-2015 07:00 PM
Arlen Ness Stage 2 Big Sucker Air Cleaner Kit For Harley Touring redbaron Parts for Sale 6 04-19-2014 07:33 AM
Difference between Arlen Ness Stage I/II danhubbardsr Intake and Exhaust 0 04-05-2013 04:31 PM
Arlen Ness Big Sucker RoadGlideRider Intake and Exhaust 13 10-16-2011 07:29 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome