Wilsons Sandbox
http://www.frenchandlogan.com/phpBB3/
http://www.frenchandlogan.com/phpBB3/viewtopic.php?f=52&t=242242
> A guy on another list is doing some dyno testing, starting with a > stock bike, then making changes to jetting, airbox, filter, and > exhaust. Not the last word, but his results are enlightening: > > http://www.patmanracing.com/klrdyno.htm
Plus miserable gas mileage and using a pipe that falls apart on long trips. For the $500+ this kind gent spent on the mods, he'd have better spent it trimming the pounds and upgrading the suspension. Yet again people claiming 40+HP on the KLR without major engine work are smokin' crack. Yes, I would agree that throttle response may be improved, but people, especially all the seat-of-my-pants "I modded the airbox, threw in a jet kit, put a new pipe on and switched to a K&N and that got me a couple extra horsepower" people, need to realize the following: (repeat after me!) improved throttle reponse != more horsepower And without the dyno runs to prove it, those folks are just wasting their money in the quest for more horsepower. But hey! That tax refund had to be spent some how! Z> i.e. tons of work and money, for mentioned, I'm sort of assuming a zippier throttle response out of it. > Not sure I'd go through the bother.
On Mon, 2004-01-12 at 10:50, Chris wrote: > i.e. tons of work and money, for mentioned, I'm sort of assuming a zippier throttle response out of it. > Not sure I'd go through the bother. Plus miserable gas mileage and using a pipe that falls apart on long trips. For the $500+ this kind gent spent on the mods, he'd have better spent it trimming the pounds and upgrading the suspension. Yet again people claiming 40+HP on the KLR without major engine work are smokin' crack. Yes, I would agree that throttle response may be improved, but people, especially all the seat-of-my-pants "I modded the airbox, threw in a jet kit, put a new pipe on and switched to a K&N and that got me a couple extra horsepower" people, need to realize the following: (repeat after me!) improved throttle reponse != more horsepower And without the dyno runs to prove it, those folks are just wasting their money in the quest for more horsepower. But hey! That tax refund had to be spent some how! Z
The miniscule boost in peak HP was expected but I do like the boost in low-end torque in the last run. Was it worth the money he spent? No chance in hell. RM>A guy on another list is doing some dyno testing, starting with a stock >bike, then making changes to jetting, airbox, filter, and exhaust. Not >the last word, but his results are enlightening:
Actually with a CV carb it does test more than WOT. The throttle opens as fast as the slide can rise. You're thinking of a Roundslide maybe?>The other thing about a dyno is that it is only measuring wide-open throttle which doesn't necessarily tell everything about how the engine performs under other throttle conditions, >
Very true.> which happens to be important. A dyno is only a baseline to how the engine performs, it doesn't tell you everything about how well the engine "works" under actual conditions. >
For a while I had a Mikuni roundslide on my A15. I might go back to it, for the instant throttle response. It actually dynoed with LESS power, but it was much better offroad. I took it off because I got annoyed with the heavy throttle action. I don't know how many coils I can safely cut out of the return spring. -- Devon Brooklyn, NY A15-Z '01 KLR650 '81 SR500 cafe racer "The truth's not too popular these days....." Arnold Schwarzenneger, in The Running Man> >I also agree that improved throttle response != more power, but if you don't think it is really important you probably don't do much off-road riding. >
----- Original Message ----- From: To: dsn_klr650@yahoogroups.com> Sent: Monday, January 12, 2004 7:25 PM Subject: Re: [DSN_klr650] More fuel for the fire. > > On Mon, 12 Jan 2004, Judson D. Jones wrote: > > >A guy on another list is doing some dyno testing, starting with a stock > >bike, then making changes to jetting, airbox, filter, and exhaust. Not > >the last word, but his results are enlightening: > > The miniscule boost in peak HP was expected but I do like the boost in > low-end torque in the last run. Was it worth the money he spent? No > chance in hell. Are you kidding? A ten percent gain in torque in the mid range and a bike thats a WHOLE lot nicer to ride. Mabey not worth it to you, worth every penny to me. And I'd bet that any of the guys out there riding well tuned KLR's that are on the list would agree. But thats ok, you can ride behind us any time. Dan Bittner Sacramento A16 03 YZF 600
stock> > On Mon, 12 Jan 2004, Judson D. Jones wrote: > > >A guy on another list is doing some dyno testing, starting with a
Not> >bike, then making changes to jetting, airbox, filter, and exhaust.
in> >the last word, but his results are enlightening: > > The miniscule boost in peak HP was expected but I do like the boost
No> low-end torque in the last run. Was it worth the money he spent?
FWIW I live in jacksonville fl . sea level I run a K&N, needle set 3rd from top,slide drilled, supertrapp EAR (4 discs) , airbox mod w/ 6 1" holes 4 of wich are plugged. valves set at the very end of loose. burn 8oz of oil every 1500 mi or so. Every winter I play with jetting. I find 2.5 turns of pilot idle. 40 pilot jet and 148 main jet (both stock) to be the best running and best looking plug. Also a lot less soot on my luggage rack. I have played with jets up to 42 pilot and 160 main and needle. Ass dyno said there was more power there with the airbox opened but fuel went down to 33mpg. 150 main is to rich at the top. The float fuel level seems to best set right at the bowl mating surface. Not above or below in spec. Supertrapp disks to effect tuning quite a bit. at least going from 8 down to 4. I may be only flowing as good as stock. My jetting seems to indicate that. Those dyno charts seemed to be about what I was feeling in the portable seat dyno and fuel mixture by the plug and even sound.> chance in hell. > > RM
Actually with a CV carb it does test more than WOT. The throttle opens as fast as the slide can rise. You're thinking of a Roundslide maybe?>The other thing about a dyno is that it is only measuring wide-open throttle which doesn't necessarily tell everything about how the engine performs under other throttle conditions, >
Very true.> which happens to be important. A dyno is only a baseline to how the engine performs, it doesn't tell you everything about how well the engine "works" under actual conditions. >
For a while I had a Mikuni roundslide on my A15. I might go back to it, for the instant throttle response. It actually dynoed with LESS power, but it was much better offroad. I took it off because I got annoyed with the heavy throttle action. I don't know how many coils I can safely cut out of the return spring. ----------------------------------------------------------------------------------------------------------------------- A friend of mine also put a cable slide Mikuni on his bike for better throttle response and he said it was an improvement. He thinking of converting it back since CV carbs, because of their design, have some built in altitude jetting compensation. He lives in Colorado so this is important. Have you tried drilling out the slide to 1/8", it made a significant difference in throttle response on my bike?> >I also agree that improved throttle response != more power, but if you don't think it is really important you probably don't do much off-road riding. >