Yes sir, one dyno sheet from one bike that starts the trace at 2600 RPMs clearly proves that the low end power gained from the scavenging effect of the 2:1 type exhaust is a myth.

 

also what dyno is it? a 100, 150, 200, 250, 250i the STD will drop the numbers a little. If this is on a calibrated 250I it is very nice. if it is on a dyno jet 100 or 150 about average. It wouldbe nice to see if they have the afr chart. regardless I think it is a cool way to monitor your upgrades.

 

no sniffer yet. Going to do complete base again with pipes and add a fuel-moto air cleaner and PV with maps from Jamie 2 maps economy and hot weather will then determine if i want to go with cams. I dot think what the number are mean as much as what happens on each stage.

 

take a deep breath buddy. I think you might need a ride.

Not sure how in the world you got a 2-1 exhaust into a dyno sheet that only compares a stock system with TDs, but whatever.......

 

I think his post must have went over your head. I got what he meant, but then again it is winter and I need a ride too.

 

I completely understood what he was saying.

The comparison dyno was a stock system and a Rinehart TD. There is a forum myth that changing out your stock system to a TD will cost you low rpm torque. That's not always the case, as this dyno shows. That's the only point I was trying to make, and one that has apparantly gone over both of your heads. You're right, you might need a ride, too.

Bringing in a 2-1 exhaust into the discussion has as much relevance as if someone said, "why are you trying to make a Harley fast, why not just buy a Hayabusa, they're so much faster." It might be true, but it's not relevant to the discussion, which in this case was a comparison of a stock system against a TD.
But then, some guys just like to argue.

I'm out, you can have the last word.

 

I'm good I rode a couple days ago. My mistake, my fault for assuming the true dual myth you were refering to was in comparrison to a stock system, guess that myth must of passed me by. All I can say is honest mistake, first time I've ever encountered a true dual comment that wasn't being compared to a 2:1. I will maintain that a trace that starts at 2600 RPM really doesn't show low end power so its still a baseless claim, but whatever.

 

the final numbers are in

 

run #2 stock 103
run #8 True dual classic Reinhardt
run ##11 above plus fuel moto AC
Run #14 above plus PV mapped by Jamie
last three runs all ran same day so all variables the same final curves are smooth fuel ratio little rich at 12.5 but for new bike will run a little rich then might lean out.