Quote:
Originally Posted by Pig9r
|
I don't agree with the closed loop comments, since even with Tuneboy, you can disable the O2 sensor.
However, in one of Wayne's tutorials, he talks about the problem of removing the secondaries and then tuning with the PCIII. The problem is that DynoJet tunes are generally done in 4 th and the secondary settings in 4th can be different in the stock base tune than in the lower gears. So the trim you set in 4th may not be optimal in 2nd at a particular rpm.
I am at a point where I don't care about more power. My bike runs great, it's faster than any HD, which occasionally I blow away, except perhaps a V-Rod which I haven't dealt with. I don't even have the desire to change the intake. I look at a lot of the dyno charts from mods posted on these sites and even though the peak values may be higher than mine, they have a lot of weird dips and sh!t in them - mine is perfectly smooth - thanks to Wayne.
But I do find all this stuff interesting scientifically. I talked at length to Derek at moto-lab.com in Rewood Ciy, CA. He's a major performance engineer. They use an eddy-brake dyno (Factory Pro EC997a) not a DynoJet. He tunes for power and maximizes performance in rpm ranges and gears specified by the users needs.
As far as Dynojet goes, my Triumph mechanic (co-dealer) has been doing dyno tuning on HD's for a long time, before they became a Triumph dealership. Most of his business is squeezing more HP out of HD's from all over the country and Canada. They market custom exhausts, heads, valves, pistons and cams. He always likes to remind me that the stock Rocket is far more powerful than any of the HD enthusiasts can ever achieve with the big bucks they drop on their bikes.
After he dynoed my bike with Wayne's 20050_2, I asked him what I could expect for extra power if I put a PCIII in and he said forget it - it wasn't worth it - even though he would make the bucks.
Speaking of PCIII's, when they came out for the Rocket, I said I wanted one. He had tried tuning it on his bike and said the thing didn't work. He wouldn't install them in any Rocket even though a lot of people wanted one. He bitched to DynoJet about it. They ignored him for over a year but they finally admitted that the original O2 sensor bypass was fooked and this is why they came out with the revised part, which works.
This guy has done hundreds of Harely PCIII dyno tunes. He claims that Tuning Link doesn't work, at least up to his standards. Being a former Pro Stock mechanic on his own cars, he probably has pretty high standards. He does PCIII tunes manually, cell by cell and he repeats it until the results are stable. It takes a lot longer than a Tuning Link run. He gets more power and this is how he knows that Tuning Link isn't optimal. It takes him a few hours to crank out a manual tune. Wayne did a sh!tload more runs in his tutorials to optimize his tunes. Hombre spent big bucks and many hours getting his Tuneboy tuned.
This is why I suggested that someone can't assume that his "custom" PCIII map is any better than the stuff Wayne cranked out.
By the way, I heard my mechanic is putting a supercharger on a Rocket. He had not done this before until he decided what else needed to be done to the engine to handle the extra power. I can't wait to see what they come up with for power. I hope they take it to Fallon for 1/4 times.
On the other hand,I think what you did in fine tuning Wayne's tune with a PCIII overlay was a really good way to go. I wonder if anyone else has done it.
Linear Mode
