Ok Tuning geeks...Yer opinion..?
#22
05-23-2011, 07:37 PM
I give up all I know is the thing runs like a raped ape...with hiccups.
#24
05-23-2011, 09:10 PM
Guest
Posts: n/a
So it seems it has been established that the stock ecm IS capable of compensating for the added air flow of a high flow intake and aftermarket exhaust. Meaning that any programmers benefit is to add just a little more fuel to squeeze out a little more power. Is this correct?
#25
05-23-2011, 09:13 PM
Road Captain
I have a PCV because I didn't know better when I bought the bike. Having done the research since, I would not do it again (btw, it's for sale if you want it). The O2 sensors would adjust, but the PCV takes them out of the loop. Yes, I've seen the a/f ratio of a stock bike with pipes and Stage 1 a/c with no tuner. Stock bikes are lean (but not dangerously so) from the factory. People add the tuner for many reasons, not many of which are actually problems. The ECM will adjust to add enough fuel to maintain the factory programmed AFR regardless of a/c and pipes added. You add a tuner to get more performance than you can get from just a/c and pipes. Some run it rich to keep the engine cooler, although this can also cause problems. You also add it to alleviate cold stumble.
Do some actual research, don't just argue on a forum. Go to Nightrider.com, and talk to Stephen Mullens. This is what he does for a living.
Run what you want, it's not my money, and won't hurt my bike at all.
Do some actual research, don't just argue on a forum. Go to Nightrider.com, and talk to Stephen Mullens. This is what he does for a living.
Run what you want, it's not my money, and won't hurt my bike at all.
#26
05-24-2011, 02:18 AM
http://tuneyourharley.com/biketech/c...l-map-revealed
http://tuneyourharley.com/biketech/c...losed-loop-efi
http://tuneyourharley.com/biketech/c...p-fuel-mixture
http://www.harley-performance.com/stage-1.html
To OP, I found these to be pretty useful in understanding the "debate." Especially this quote:
"EFI models are another story. Fuel injected models use a preprogrammed map to instruct how much fuel is to be delivered. Since you have changed the way the engine breaths, those instructions may not supply the proper stable fuel mixture under all conditions. Granted your bike will still run, but the only way you are going to get the most out of your EFI bike is to have it remapped..." (www. harley-performance.com).
Some seem to be biased to a particular programmer, but give the same basic message.
http://tuneyourharley.com/biketech/c...losed-loop-efi
http://tuneyourharley.com/biketech/c...p-fuel-mixture
http://www.harley-performance.com/stage-1.html
To OP, I found these to be pretty useful in understanding the "debate." Especially this quote:
"EFI models are another story. Fuel injected models use a preprogrammed map to instruct how much fuel is to be delivered. Since you have changed the way the engine breaths, those instructions may not supply the proper stable fuel mixture under all conditions. Granted your bike will still run, but the only way you are going to get the most out of your EFI bike is to have it remapped..." (www. harley-performance.com).
Some seem to be biased to a particular programmer, but give the same basic message.
Last edited by jimmy85; 05-24-2011 at 02:20 AM.
#27
05-24-2011, 02:40 AM
Cruiser
Join Date: Oct 2010
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#28
05-24-2011, 03:18 AM
Interesting thread,,
My Useless 2 cents,,,,
Are you reading the plugs ? not a chalky white,,but a copper or coffie color.
No flat spots along the power curve ?
You say the bike runs liked a raped ape .
I'd just ride the damn thang.
btw that stock air filter,,not paper,,same as mine.
I felt a difference after I cleaned It In hot soapy water,,
dishwasher works good to XD
My Useless 2 cents,,,,
Are you reading the plugs ? not a chalky white,,but a copper or coffie color.
No flat spots along the power curve ?
You say the bike runs liked a raped ape .
I'd just ride the damn thang.
btw that stock air filter,,not paper,,same as mine.
I felt a difference after I cleaned It In hot soapy water,,
dishwasher works good to XD
#30
05-24-2011, 10:28 AM
Tourer
I'm not 100% sure but I think it will just revert to open loop operation.