USA S10 Stock Dyno Results

[~TABASCO~]

I'm also thankful for the runs everyone has done. There is a lot of good info there. What I'm looking for in the stock bike run with ECU flash, is the AFR to see how they have changed the fueling and then the power and torque curves. That will be very interesting..

Thats what Ive been asking too.... no answer as of yet.... Is this "butterflies".. timing...fuel pulse..Etc... Looking forward to KEES DYNO... Should tell us a lot of info.. .

 

[jajpko]

Thats what Ive been asking too.... no answer as of yet.... Is this "butterflies".. timing...fuel pulse..Etc... Looking forward to KEES DYNO... Should tell us a lot of info.. .

Have you looked at maybert's dyno charts and the AFR? And then at his PCV fuel and AFR numbers? Also compare this to X5's charts and he is stock except for can. pretty interesting numbers.

 

[fredz43]

Tremor, I don't consider myself a "detractor", just trying to usnderstand what we have here with our USA bikes. The two dyno runs we have seen for them have some interesting differences and if I recall, the Euro dyno runs have looked different also.

Not trying to belittle anyone's choice for a reflash, especially on a Euro bike, but so far I am interested, but confused as to what we have seen with the CA bike and the FL bike runs. I also would like to know more of what the CA tuner said about anomalies with lower gear dyno runs.

Best wishes with your reflash and "more power to you."

 

[sportrider]

My bike is stock except for Wasp's can. I don't know of any dyno's near me, but I will be in Alaska in July and can compare with other S10s. I will let you guys know what I think of the reflash when my ecu comes back.

 

[Tremor38]

Tremor, I don't consider myself a "detractor", just trying to usnderstand what we have here with our USA bikes. The two dyno runs we have seen for them have some interesting differences and if I recall, the Euro dyno runs have looked different also.

Not trying to belittle anyone's choice for a reflash, especially on a Euro bike, but so far I am interested, but confused as to what we have seen with the CA bike and the FL bike runs. I also would like to know more of what the CA tuner said about anomalies with lower gear dyno runs.

Best wishes with your reflash and "more power to you."

Haha! Yeah, it's probably just best to chill out for awhile and await more data. I will say that I'm firmly convinced a power restriction exists on the stateside machines after seeing California results.

I can understand a cam proflie affecting the power split in the mid to upper RPM range because of the drum being accelerated more quickly in the lower gears, and that's reflected on the California graph (power split increases from 10 to 18hp as revs climb), but not being able to take advantage of the cams doesn't explain the 10 HP split that starts in the lower RPM range and continues throughout the entire range; that's all TB position IMO. The 'dip' in the lower range that we see on some bikes looks to be a fueling issue rather than TB manipulation. The HP splits across the entire RPM range, which are most prominent in 1st and second gear, most likely are because of the 'limit on TB opening' as stated at the Diapason website. In the two highest gears on the run in this thread (which is not really 'U.S. stock' because it has an aftermarket can), there actually is a gradual depression of the curve centered around 4300RPM in the 4th and 5th gear runs. It's not the sharp dip we've seen on bikes with the stock pipe.

Anyway, we seem to have people approaching this with certain mindsets. One of those mindsets probably started with somebody saying something akin to they would almost be willing to bet no restriction exists. Maybe that's why there are people who would rather focus on what agrees with their premise...like giving the most creedence to a dyno run that did pulls in the least limited gears (3rd and 4th)...on what looks to be an inertia drum dyno...or choosing to only focus on a 4hp gain in peak power at an RPM they will seldomely spend any time at, when there's almost a 20hp gain available in 1st gear and about 10hp gain in second. These gains in the lower gears are all coming in a very usable range. Nevermind that the California runs were done on an eddy current dyno and did pulls in all gears. No reason to believe a dip would be in the CA machine's curve either because he has a full aftermarket exhaust, PC and AT. This feels like OJ's missing glove all over again

Perhaps the guy who did the California run can see how his tuner weighs in on the subject.

 

[Tremor38]

The magazines have done dyno tests of about 95 on stock bikes. That is stock without the addition of Chinese cans. Back in the old days guys would change exhaust and cut 10lbs but loose a few HP, now we can cut zero lbs and loose a few HP but get that better look and sound. I'll sty stock. ) You notice the more fooled with to gain HP, the more loss? Talk about the power restriction in the first 3 gears, big deal. Leave alone.

That is the most uninformed load of doodoo I've ever heard.