Fuelpak essential or not?
Road Captain
Joined: Dec 2009
Posts: 646
Likes: 1
From: Rockford, IL
Look at it like an old wood stove. U load it up with burning wood. What happens when you open the vents (high flow air filter), then open the flue all the way (exhaust). More air in and out equals MUCH higher heat in the stove (cylinders). Adding more fresh wood (fuel) cools it down for a bit. If that extra fuel is constant, it stays cooler.
+1 on A/F ratio
14.2- 14.5 stock, once engine gets hot it richens up to about 13.6- 13.8. Still a little bit lean, but better. Fuel management can bring that down to 12.7- 12.9 on a cold start and 11.9- 12.3 at temp. My indie says 12.0 to 12.2 is about as good as it gets (Beach atmosphere though).
+1 on A/F ratio
14.2- 14.5 stock, once engine gets hot it richens up to about 13.6- 13.8. Still a little bit lean, but better. Fuel management can bring that down to 12.7- 12.9 on a cold start and 11.9- 12.3 at temp. My indie says 12.0 to 12.2 is about as good as it gets (Beach atmosphere though).
Cruiser
Joined: Nov 2009
Posts: 206
Likes: 0
I bought my bike from dealer with a stage 1 screaming eagle kit and vh short shots and asked about this... they said they had remapped the FI system and it was good to go as is... so if you have a newer bike with Fuel ignition then maybe a remapping is all you need... and it's still under warranty so if the engine does blow up... they're replacing it...
Cruiser
Joined: Nov 2009
Posts: 157
Likes: 0
From: Amarillo, TX
Whats a retro fit cost???
This may be a tad off topic, but....
Gotta 07 883, and some how resent spending $500 - 1000 heavy bucks to do what a $25 in jets and a timing light can do - the curse of being an old tuner or
is this desecrating some holy grail
I do understand that these ECM's update for everything but a lack of musturd on the Big Mac, and do it a jillion times a second - but why is this necessary if there is an alternative? Makes me wonder how we ever developed decent HP before.
For the same money as a ThunderMAx or PC-V and Dyno couldn’t a person put on a carb, retro up a timing/ spark set up and forever then bypass $200 dyno trips, burned out $600 ECM replacements etc????? Any one tried this???
Gotta 07 883, and some how resent spending $500 - 1000 heavy bucks to do what a $25 in jets and a timing light can do - the curse of being an old tuner or
is this desecrating some holy grailI do understand that these ECM's update for everything but a lack of musturd on the Big Mac, and do it a jillion times a second - but why is this necessary if there is an alternative? Makes me wonder how we ever developed decent HP before.
For the same money as a ThunderMAx or PC-V and Dyno couldn’t a person put on a carb, retro up a timing/ spark set up and forever then bypass $200 dyno trips, burned out $600 ECM replacements etc????? Any one tried this???
Last edited by Snarvol; Jan 7, 2010 at 08:23 PM.
Stage IV
Joined: Nov 2009
Posts: 4
Likes: 0
From: Esbjerg Denmark
Hi !!! I don't think any of the guys here are off, BUT...let's get things into perspective; If you do 55 mph crusing along at max 4000 RPM, or you do (like me, living close to Germany with no speed limits) rev up for long distances, then you have to worry about fuel management, and use a decent oil grade. If you never (rarely) get above 4000 RPM for longer times, in very hot climate, then I would consider not spending money on expensive counter measures, and not worry too much about neighter fuel management nor oil grade.
Drive safe...
Drive safe...
Road Captain
Joined: Dec 2009
Posts: 646
Likes: 1
From: Rockford, IL
Hi !!! I don't think any of the guys here are off, BUT...let's get things into perspective; If you do 55 mph crusing along at max 4000 RPM, or you do (like me, living close to Germany with no speed limits) rev up for long distances, then you have to worry about fuel management, and use a decent oil grade. If you never (rarely) get above 4000 RPM for longer times, in very hot climate, then I would consider not spending money on expensive counter measures, and not worry too much about neighter fuel management nor oil grade.
Drive safe...
Drive safe...
Cruiser
Joined: Nov 2009
Posts: 157
Likes: 0
From: Amarillo, TX
The question was - has anyone retrofit an ECM bike with carb and ign?? It would be pretty practical and sensible - IF THIS WERE FEASIBLE MECHANICALLY.
Road Captain
Joined: Dec 2009
Posts: 646
Likes: 1
From: Rockford, IL
Guess the point I was trying to make is: a carb and conventional ignition system is real inexpensive to tune ($20 worth of jets) and can yield about the same results as a good $500+ fuel management system. Custom ignition systems can get curved and timed close to an ideal advance for your riding conditions, and again for free as opposed to a $200 dyno session. We raced like this for 70+ years.
The question was - has anyone retrofit an ECM bike with carb and ign?? It would be pretty practical and sensible - IF THIS WERE FEASIBLE MECHANICALLY.
The question was - has anyone retrofit an ECM bike with carb and ign?? It would be pretty practical and sensible - IF THIS WERE FEASIBLE MECHANICALLY.
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Road Warrior
Joined: May 2009
Posts: 1,755
Likes: 1
From: dual citizen nomad
This may be a tad off topic, but....
Gotta 07 883, and some how resent spending $500 - 1000 heavy bucks to do what a $25 in jets and a timing light can do - the curse of being an old tuner oris this desecrating some holy grail
I do understand that these ECM's update for everything but a lack of musturd on the Big Mac, and do it a jillion times a second - but why is this necessary if there is an alternative? Makes me wonder how we ever developed decent HP before.
For the same money as a ThunderMAx or PC-V and Dyno couldn’t a person put on a carb, retro up a timing/ spark set up and forever then bypass $200 dyno trips, burned out $600 ECM replacements etc????? Any one tried this???
Gotta 07 883, and some how resent spending $500 - 1000 heavy bucks to do what a $25 in jets and a timing light can do - the curse of being an old tuner or
is this desecrating some holy grailI do understand that these ECM's update for everything but a lack of musturd on the Big Mac, and do it a jillion times a second - but why is this necessary if there is an alternative? Makes me wonder how we ever developed decent HP before.
For the same money as a ThunderMAx or PC-V and Dyno couldn’t a person put on a carb, retro up a timing/ spark set up and forever then bypass $200 dyno trips, burned out $600 ECM replacements etc????? Any one tried this???
forget the easy sportser mikuni jus go ahead and buy the complete ultima air cleaner kit for bigtwins cuz it fits sportster with the sportster/buell friendly manifold (just ebay off the BT mabifold that comes with it) you'll save money and get an awesome intake as an added bonus. the ultima kits are 42mm,45mm and 48mm, i think they also make some kits for monster inch harleys too.
Last edited by ernofsteel007; Jan 13, 2010 at 09:54 AM.
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