Thanks for the info going to try this when I get my new rush pipes !!
Printable View
....bugger. I twisted the throttle.....
I guess we'll try again tomorrow.
A mate of mine yesterday while checking out the bike also asked the same questions about exhausts
He races V8 Sprint cars and did a tour in the states with a premier Nascar team as they needed a bit of a hand????
Says that aftermarket exhausts on bikes are a waste of time and basically cut horsepower.
He's been an Australian Motorcycle champion in his days maybe 6 times before he got into cars.
Says that basically the Major motorcycle manufacturers spend maybe 100's of millions of dollars on exhausts trying to get the maximum horsepower out of the machine while still complying with Californian Pollution laws, maybe the toughest in the world. And nothing gets into America on the road without doing this???
Says that maybe an aftermarket exhaust may work if yah get the chip with it but most likely the chip will only stop the backfiring and hiccups.
Says the way to do it that works is to do the 3 things that work to get the bike to go.
Firstly get the bike to breath
Second get the bike to go bang when it should (Aftermarket) ignition system
Then do the exhausts, something like Vance and Hinze that guarantees performance
With the help of a wiz kid on a dino maybe a 30% increase in horsepower.
Says that everything else is a wank
And he should know he's got more Australian Motorcycle and Car Australian champion ships on the wall than I've had????????:icon_cool:
Basically all correct Terry.
Mostly all stock systems are California (CARB) Compliant.
Many aftermarket pipes are not and will fail a California inspection.
But if one doesn't live in California......one can do some pretty neat stuff.
Now, living in Pennsylvania, the bike's are inspected yearly, but my '95 HD has been "grandfathered" into the older category of not requiring an emissions test.
For those guys living in Florida, there is no emissions test and I don't even think there is an annual inspection, so you can pretty much do what you want.
Everything varies by state.
The Thunderheader exhaust on my HD is not CARB compliant.
The air system has been reworked.
The carb has been replaced and has been re-jetted.
She's been dyno'd & tweaked repeatedly until her 80 cu inch (1310 cc) Evo motor produced 80 hp and that was in 2009. Not bad for a '95 HD.
Without adding a blower, that's the best she's gonna do.
I'm sure that the F6B could be tweaked for more horsepower with an aftermarket exhaust, but I do not know what can be done to the air intake, again, short of adding a blower (turbo or supercharger).
The intake maybe "open" enough to lend to some tweaking of the exhaust system and chip, but with most F6Bs still under warranty, I don't think anyone has gone to a "total performance" upgrade - yet.
Will be VERY cool when it happens though.....
No; completely unnecessary. If your bike runs good, then call it a day and enjoy it.
If you were a pro racer and you had access to ignition, fuel, and other tables... and you needed to get the last 5% of performance... then sure, a dyno session with a qualified tuner writing a custom tune may make more power with just breather mods... but resetting an ECM does nothing.
The GL1800 actually uses a couple of "3D" maps, one for low-load low-throttle and one for high-load high throttle. These maps are hard-coded and no reset, restart, or re-anything else is gonna change them. The ECM reads a set of basic inputs, checks the correction and control input sensors, and then generates a set of outputs to control ignition and fueling.
Whether your ECM is reset or not, it will still use the same set of sensors, in the same way, and it will still use the same tables to operate your engine.
https://lh6.googleusercontent.com/-q.../PFI%25202.jpg
https://lh3.googleusercontent.com/-N...M/s800/PFI.jpg
Our ECM uses sensor input to adjust ignition and fueling, not adapt; that's something different. An adaptive ECM "learns" a particular driving style to help predict the engine control outputs.
Bob, the procedure above doesn't recallibrate. Recalibrating an ECM means that the map profiles in the pics I posted above have been re-written (re-shaped)... and that doesn't happen with a reset. It better not!
Back to factory? If you're not running a Guhl tune, you ARE at factory.
Reseting the ECM is vastly different from recalibrating it; Guhl is the only person I know of who is doing commercial recalibrations for the average Joe.
The calibration in this bike, or for that matter, in any production vehicle on the road, is not cal'd at sea level, nor is it cal'd at any other single altitude. OEM tuners go to GREAT lengths to create a single tune that is the best combination to work in ALL environmental conditions worldwide; high, low, hot, cold, dry, and humid.
Guhl could create a tune optimized for elevation, if he were so inclined $, but reseting the factory tune means that you are still running the factory tune (i.e. nothing is different).
Exactly how does the above procedure help a bike at elevation? And how does it recalibrate the ECM?
I'm open to the idea that I may be missing something... but I don't believe that procedure will do anything to help with elevation; how could it?
Valid concerns... but I'd be godsmacked if you can show me a filter and exhaust mod that will throw an OEM tune out of range. Maybe on a newer platform, but not on a platform that has been on the road for 15 years.
Tail pipe sniffers are for folks who are not serious about tuning engines. The AFR sensor needs to be pre-cat, not after. Even if you're running cat-less it needs to be much closer to the exhaust port. If you're not at stoich at idle, you'll know by the smell. If you ARE at stoich at high throttle, you'll know by having your engine blown.
Honda won't tune your bike but Guhl will. Try checking some of the Guhl threads or maybe Guhl's website for before and after a/f ratios on some dyno sheets that have been shared.
Mate I ran a stroker for maybe 20 years. A 74 FL stripped and full of S&S with a Barnett and out to 93.
No how important it is to do the three things together and topped off with a Dyno
No idea about the modern stuff
But I do know if yah fool with it and it can smoke the rear wheel like my old shovel in second on standard and not on Av Gas then your on a winner
And in Australia we have a decibel limit of 93
your off the road if its louder:icon_cool:
SRT-8,
I understand your post below - got it, no sweat. Thanks!
So.....what does the ECM "reset" function do?
And why/when would I do it?
Mate normally 45 degree angle maybe 10 metres away and a drive/ride by
Also Exhausts have to be stamped with the Aussie approval stamp
No stamp and bike is off the road, like cant be ridden, trailered home??
But unlike Calafornia we still have 2 stroke lawnmowers:icon_cool:
Copy. That sounds like the testing for the stamp of approval....
What happens here in my portion of PA, New Hope to be specific, is the nice policeman will pull you over at a "Motorcycle Only Checkpoint" and ask to see your license, registration and proof of insurance. Meanwhile, you haven't been told what the matter is. He will then take his "calibrated" dB meter, put it at a "standard distance" (which varies from one badge to another) and take the loudest reading he can get and then cite you.
My specific story:
I had North Carolina plates (legally - out of state military) on the FLSTN and I got the "Boy, you pretty far from home, ain'cha?"
I responded, "No, sir, about 7 miles or so from my home."
He comes back with "What are these NC plates doing here?"
I then informed him that I am military, currently residing out-of-state, and produced my Military ID. The military ID sticker on the windshield 'escaped' him.
He then asked if I was a Reservist, and I pointed to where it said Active Duty on the ID in his hand.
He then said "Oh, a Lieutenant Colonel? Marines? You must think you're something special, doncha? Well up here, we have noise regulations and your pipes are too loud."
I asked him for the dB reading and what the statute limits were for this area. I asked him if the dB meter was to be set to Flat, A or C weights. (all industry standards)
He couldn't answer any of those questions - he just "knew" that my pipes were too loud.
I told him I would look up the regs & standards for measuring and that I would ensure future compliance.
I asked for my papers back and told him to have a nice day, and rode off, quietly.....
Didn't want him to ask about my Texas Driver's license or my PA CC permit.
So if someone "tweaks" their "Aussie approved" pipes, and the constabulary think it needs re-testing, what happens?
You get pulled over?
Then what?