As stated in introductions I must say I’m a little disappointed in the FI induction system. I’ve always been a carb man looking for raw power... not fuel efficiency or longer lasting spark plugs. Haha. My dumbass originally thought it’s great that the Swing is FI’d and would self tune. No more jetting multiple times to get right until the weather or conditions change like my small scooters. Wrong? Even the Swings with an 02 sensor is not self correcting at WOT.
After installing the exhaust and eliminating the stock air box I quickly realized how lean the factory tune is and that I would certainly be creating a even more dangerous lean condition. So I haven’t even run the engine and instead of faking out any temp sensor that I would try to do the right thing and invested in a new “discontinued” DynoTune PC’r III at the anal ease tune of $370. Called today at nearest dyno tuning center and they quoted me $500. Seriously?? Then when I change the bikes configuration..... right back out the ballpark again. All for throttle bodies that are most likely too small, potential loss of program during a ride, electrical failure, etc etc.
My first impression is screw the $500 dyno tune and just try a generic tune to download close to my application. I mean really how much more benefit am I gonna gain? Couple HP, possibly a few? Not sure if it’s worth it at this stage. I always like running my engines a tad on the rich side to have a safety factor and a little better cooling. Totally worth a fraction less power with more frequent oil changes.
I guess what I’m asking to all the veteran Swing hot-rodders is:
- Has any of you changed to carbs?
- Has your experience shown dyno tuning the FI worth the cost?
- Has anyone swapped to larger throttle bodies/Injectors?
- Is faking out the IAT sensor the better solution at this level with a mostly stock engine vs. the PC?
-Does anyone have a program that I could download that would put me in the ballpark for now?
-Or..... just download the European map and call it a day and start ditching more weight?? Lol.