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  #61  
Old 20th January 2006
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Damn, my dealer charges only $39 for the dyno run, and $189 for a full dyno tuning (if you go for the tune after a dyno run, you only pay the additional $150).

Anytime I make a change to either of my bikes' basic engine/fuel setup I spring for a dyno tune because I want to make sure I'm getting the best performance I can out of my bike and that my air/fuel ratio is not f*$%ed up by the change. (My Heritage is FI and has a Power Commander on it, so they charge less to dyno tune that bike.) Being at high altitude and having the ability to change altitude by as much as 7000-8000 feet in one day makes it really important to have my carb'ed Sporty dialed in.
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  #62  
Old 20th January 2006
Phil R Phil R is offline
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I find some of this stuff a little hard to believe. My '05 1200R showed 72.15 HP and 71.44 Torque when tuned last fall on the Dynojet with Supertrapp 2:1, NHRS Hurricane Flow and appropriate jetting for the setup. My bike goes like a bat outa hell with the torque peak down at 3,500 rpms without losing anything at the top end. I could probably push the HP up by adding discs and raising the torque peak, but 80HP, I gotta see that one.
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  #63  
Old 20th January 2006
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Phil ....

Your Stage 1 made just about the same as mine when I had a Stage 1.

Mine made 71 rwhp SAE corrected (don't remember the torque)

Bone stock, these 04-06 make 60 rwhp
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  #64  
Old 20th January 2006
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I found another place that will do a dyno for $85.00 not including any tuning...

Sheeeet is expensive...

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  #65  
Old 20th January 2006
CBAS5 CBAS5 is offline
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Hmm.... This is interesting stuff. Both you guys were running 2-1 systems and made around 71-72 hp. While if you look at the dyno's from other's people's bikes they are running slip-ons and and a/c to get 75-80. It seems like cycle shack's and the big ness sucker are a good combination. This is just a quick observation. I would like to see other dyno sheets and what people are running to see if there's a correlation.
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  #66  
Old 20th January 2006
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Quote:
Originally Posted by CBAS5
Hmm.... This is interesting stuff. Both you guys were running 2-1 systems and made around 71-72 hp. While if you look at the dyno's from other's people's bikes they are running slip-ons and and a/c to get 75-80. It seems like cycle shack's and the big ness sucker are a good combination. This is just a quick observation. I would like to see other dyno sheets and what people are running to see if there's a correlation.
I'd have to say no to that..... I just switched from SEII slip-ons to a Bassani Road Rage 2-1, and noticed a dramatic increase in power.

I'd say it depends more on the individual scoot as to the actual power gains.
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  #67  
Old 20th January 2006
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Quote:
Hmm.... This is interesting stuff. Both you guys were running 2-1 systems and made around 71-72 hp. While if you look at the dyno's from other's people's bikes they are running slip-ons and and a/c to get 75-80. It seems like cycle shack's and the big ness sucker are a good combination. This is just a quick observation. I would like to see other dyno sheets and what people are running to see if there's a correlation.
This all depends on tuning, and variances in the dyno. My first dyno run was with a SE A/C, SEII slip-ons and Yosh carb kit and I made 72hp. When I added a Supertrapp 2:1 (same as Phil R's) it jumped to 76 hp. Like Phil said, I could probably push the HP up by adding discs, and a 7000rpm ICM would give me 80hp as well. I'm just wondering if this 80hp standard Stage 1 stuff is a combination of dyno variances and a little rounding. If my bike was making 78hp, I might be inclined to tell people (especially ones who I was trying to impress) that it makes 80 - not really a lie, but it's pushing the truth. I just have a hard believeing that there's an 8hp difference between two dyno readings with SAE corrected numbers with optimal tuning.
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  #68  
Old 20th January 2006
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Quote:
Originally Posted by CBAS5
Hmm.... This is interesting stuff. Both you guys were running 2-1 systems and made around 71-72 hp.
I made 71 rwhp on my 04 1200R with a set of SE Pro II slip-on muffs, an SE air cleaner and a re-jetted stock carb running a near perfect 13.0 to 1 AFR.
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  #69  
Old 20th January 2006
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Quote:
Originally Posted by xl1200r
This all depends on tuning, and variances in the dyno. My first dyno run was with a SE A/C, SEII slip-ons and Yosh carb kit and I made 72hp. When I added a Supertrapp 2:1 (same as Phil R's) it jumped to 76 hp. Like Phil said, I could probably push the HP up by adding discs, and a 7000rpm ICM would give me 80hp as well. I'm just wondering if this 80hp standard Stage 1 stuff is a combination of dyno variances and a little rounding. If my bike was making 78hp, I might be inclined to tell people (especially ones who I was trying to impress) that it makes 80 - not really a lie, but it's pushing the truth. I just have a hard believeing that there's an 8hp difference between two dyno readings with SAE corrected numbers with optimal tuning.
I believe that it is not only normal, but also expected to see a difference in the power numbers for identical bikes.

Read Aaron's post in the NRHS section on straightness and roundness of cylinders. The numbers on factory parts are all over the place.

If you get a bike that ended up with 2 straight, round cylinders from the factory, it'll probably produce some surprising horsepower numbers.

One that has good specs on one jug, but loose specs on the other might fall in the "normal" or "expected" power range.

The poor bastard who ends up with a bike with two cylinders on the loose side of the spec is gonna be down on power.

We're talking mass-produced assembly line engines here, folks.... When the rings aren't sealing up the bore all the way through the stroke of the piston, you are gonna lose power. It's just going to vary from bike to bike as to how much we are talking about.
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  #70  
Old 20th January 2006
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I think the only way I'm going to be convinced of this is to see a bike get dyno'd with the exact same setup on two different dyno's.

And if the factory is putting out a product with specs as all over the place to make a 12% difference in power from one bike to the next, then they may have a lawsuit on thier hands if anyone starts engine dynoing stock bikes to see if they make is in the line with the factory's claims. Ford was dumb enough to get caught with the Mustangs, I think everyone learned from thier mistake.
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