120" upgrade w/RevPerf EMS

[dennish]

I upgraded my 107" to H-D's 120" kit, kinda, I kept the R&R 615/585 gear drive cams, the HPI 51mm t/b and Supertrapp 2:1. Kept the CR at 10.5. I decided to give RevPerf EMS a try. The bike starts easy, idles okay and driveability is good, over all the bike runs fine. No complaints. So I did a couple of dyno runs at the dealership Saturday to see what the motor is doing numbers wise. I think it is a little lower that I expected at 116hp and 126tq. Horsepower stayed the same as the 107, torque bumped up 9. Again no complaints the bike pulls good. Just wondering how much a tuner could improve things, a little or significantly?

I'm on the fence of whether to have it tuned or leave it. Curiosity wants me to do it but dollarwise not sure.


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[dennish]

I forgot to add the tech said that he was impress withed Darkhorse.  You could set a glass of wine on the tank and at 6000rpm not spill a drop.

[hrdtail78]

I assume he didn't sample A/F?  What you are going to gain on a protune at WOT all depends on what things are set at now.  The gains might just be in tuning that pipe.

[dennish]

Your right he didn't have time to hook up the A/F since it was "Free Dyno Day" at the dealer plus I have the closed end cap which would have made it more difficult. 

[Hornhonker]

Throttle body might be a tad small at 51mm and you did up upgrade the injectors ? It just might be starving for more air and juice ?

[dennish]

The injectors are 4.9.  Thinking about having HPI bore out the t/b then probably go to 5.3 injectors.