Finally finished tuning/dyno run

[doc]

After tuning my TLR the best I could I finally broke down and took her to be dyno'd. The guys at DPE did some further tuning to a couple of rough areas and here is the result:






126 hp at the rear wheel with 74 ft-lbs of torque. Respectable results, me thinks.

[Steve TLS]

Very nice.

[Guest]

what's that in Steve Powers?

looks like a good curve though little rough down low, but not much about that a PC can do

-

[tl1000lasse]

In steve powers it´s about a 621 hp I guess

[doc]

I think the low end difficulties arise because of the SRAD flappers are removed and the intakes opened up (JoeV's airbox mod). I was reading the article on fuel injection in the July issue of Motorcyclist, and I wonder if the flapper valves on our bikes might have been a crude/early version of the secondary buttyfly valves on the new SDTV fuel injection systems. The flappers would limit sudden rushes of leaning air followed by a gush of riching fuel during low rpm throttle changes. Just a thought.

After the long weekend (Canada Day), I plan to get out and open her up. Way too many cops on the roads this weekend in a blitz they are calling "The fast and the foolish". The provencial police just love to nail sportbikes during these events and I hate speeding tickets.

It is going to rain today, so I think I am going to install my 16t counter sprocket and Yellow Box. Pics to follow.

[Steve TLS]

One thing to remember is, what gear was the run done in? 4th? How often on the road do you go WOT in 4th from as low as 2K rpm? Not often I'd say?

Concentrate on the part of the graph where you're most likely to be WOT in 4th. Once you're past ~4K, no problems!

There's no real flat spots, A slight one at 6.5K, you may or may not notice it in the lower gears, but I doubt if you'll notice it much in the higher ones, another one around 8K.

Did they hit the limiter during the run? If so, notice your run ends at 9.8K. So these flat spots may appear higher up on your tacho, say 7-7.5K and 9-10K.

[sKeryTLs]

Originally posted by crashtd
what's that in Steve Powers?

looks like a good curve though little rough down low, but not much about that a PC can do

-

I'd hazard a guess at about 116-120 SP (Steve powers) Looking at the mods to the bike it's very similar to both TonesTLR and FastTLR's bikes.

[horkn]

no in steve powers it is probably 160 or so. hp, yeah, 116-120

[doc]

Hi Steve,
I wasn't there for the runs, but they must have not hit the rev limiter as the rpms are accurate (you can see that hp and torque curves meet at 5252 rpm). Maybe they run it up until the hp tails off. It was done on a dynojet eddy current dyno, so I don't know if this is standard practice with this type of dyno related to loading and holding a given rpm. I was a bit dissapointed that more data was not given to me (ie. fuel/air curve, and full printout of hp at rpm and % throttle opening). The guys at DPE used to tune Taylor, Crevier (yes the Stevemeister), and Szokes here in Canada, so I semi-trust they did it right.

Once I get it out on the road, I will get a feel for any adjustments that may be needed. The guys at DPE said they expect me to test it out and bring it back for any adjustments. I will take your excellent advice and concentrate on the rev range that I will use the most often for WOT runs. Overall the bike is night and day different the minute I plugged the PCII in with a M38 map.

[Steve TLS]

Doc,

What I was saying is that the graph will be accurate and the dyno calced your revs from the spark pulses, but the tacho on the bike might be out, I think most are, so in the real world the bike reved to 9.8K, but on your tacho it might have been showing redline, which means the dips, while they really happen at 6 or so etc, your tacho might be reading higher.

[doug]

You can bump the rev limit 500 rpm if you want to I have on mine and it will pull all the way to the rev limit of 10,300

[doc]

Hi Steve,
Ahh, now I understand what you meant by the tach.

I finished putting the 16 tooth sprocket and Yellow box on Saturday, and waited 24hrs for the Locktite to cure. Pretty straight forward job.



I got out on the bike yesterday for some testing. The 16t counter sprocket does not add a huge difference (6.25% change) in the gearing, but the bike seems much livelier pulling away from stops and going through the gears. I think the bike is reving about 400 - 500rpm higher on the highway (4k rpm at 100 Klm/hr) which is better for quick roll ons than 3500.

I don't notice the couple of dips at 6.6k and 8k rpm, but the bike pulls like a b#stard all the way through the power band. I think there is still a slight over-rich stumble just before 4k rpm, but once you go WOT from 4k rpm upwards, the motor howls through to redline.

Here is how the map plots out:



The PCII is the best mod that I have done to date (or more accurately is the one mod that helps gets the most out from all of the other mods). The bike performs the way it should have from the factory (if not for the EPA regulations et al. ). Now, I just have to find a few RC51s to humiliate (yea, I know my ass will be handed to me by a better rider in the twisties).

One more gratuitous pic of the bike freshly washed and waxed:



PS. Am I a picture whore yet Doug?

[GXRKLR]

Is that one of the faster Yellow ones?

[horkn]

yeah doc, the pc2 allows you to take full advantage of the other mods. like my full system. but alas, i am broke, so that wont happen this year. unless i start making more money. looks like i need another job.

[GXRKLR]

Have you thought about pimping out your pooch?