| Author | Message | ||
     Redtail69 |
Ok guys, For the benefit of the uninitiated, what exactly is dyno tuning? Took my 12R for its 1000 mile scheduled maintenance service and was told by the Buell tech that he recommends that I dyno tune it. He states "recommend dyno tuning, re-set t/p sensor & AFV (tuning on race module is for Buell race muffler only not for Jardine)" Translation anyone? Is he just trying to milk me for more cash? Help someone. | ||
| Izzinya |
Is he just trying to milk me for more cash? Help someone. we dont have a dino at my dealership and ive never had a problem with a 1k or setting the tps... with the buell race module (as far as i know) there is no need for a dyno milked for cash MABEY ???? Izzinya  | ||
| Indy_bueller |
I tried to get my dealer to dyno my bike at the 1000 mile service, he wouldnt do it saying "You dont need to do that yet, not until you make changes to the bike." | ||
| Redtail69 |
So what is this AFV he is talking about  | ||
| Craigster |
If your bike is bone stock you won't really benefit from any 'tuning', but you could at least do a quicky pulls to get a baseline. In the future, if you return to the same shop (and same dyno) for tuning and hot rod parts you will have something to compare your modifications against. I frequently see people post, "Hey I've got all these mods and made X-amount of power, what do you think it was stock?" If you test now, you won't have to ask that question. | ||
| Chainsaw |
So what is this AFV he is talking about Air Fuel Value, I believe. | ||
| Redtail69 |
Craigster, My bike is not stock. I've got a Jardine, K&N and race ecm. I wonder why the tech thinks that putting her on the dyno would be beneficial. | ||
| Thomas_lindemann |
I dissagree even if your bike is stock it will benefit from tuning.Only if the dyno has a A/F "sniffer" you would be suprised at what the A/F ratios are set at from the factory to meet emissions and provide some durability.The problem is adjusting the fuel map unless your bike has a powercommander or other means of altering the fuel map your wasting time. | ||
| M1combat |
Uhhh, welll.... Before you can do any tuning at all of any type you'll need a PCIII or TFI. Aside from that, many people seem to be happy with the race/stock ECM and the Jardine. My assumption is that he's covering his ••• so that later on if you grenade the engine he can say "I told you so". Re-setting the TPS is recommended for the 10K service as I recall. | ||
| Redtail69 |
M1, Grenade the engine? Whoa!! that sounds pretty serious  What do you mean by that? | ||
| M1combat |
Exactly what it sounds like  . Don't worry... It's not likely. These XB's seem pretty damn reliable so far . | ||
| Craigster |
Forgive me. I thought your machine was stock. If it was bone stock, it would make sense to get a baseline run. Also if it was bone stock you would have no real way to tune it. You would need a PCIII, TFI or Technoresearch software center and in the Techno sense would need to at least purchase a 'key' to allow mods to VDO EFI. With out the above there really is no dyno 'tuning' taking place since they can't tune anything. Resetting the AFV is not tunning as your bike is just going to re-adjust based on O2 readings during operation. I would ask them just what they are going to adjust while your bike is on the dyno. They might have a good answer...maybe not. | ||
| Raceghost |
If I understand correctly, the only thing you can do on the dyno with our bikes, is HP and Torque... THen again, the harley dealer here in town sucks...but the next closest is 180 miles away... | ||
| Craigster |
That's all you can measure with any bike. Some dynamometers have Air Fuel Ratio displays based on wideband oxygen sensors. Others have 4 or 5 gas analyzers. Some good ones can display real time torque on the screen. That way you can see the torque rise or fall as fueling is adjusted. The rest is up to the tuner and how much adjustability is allowed by your fueling system. | ||
| Wyckedflesh |
Unless you have a TFI or PCIII you can not dyno tune your bike Redtail, the ECM is NOT ADJUSTABLE. Which means, there is no adjustment he could make to your bike with a dyno. AFV is reset using the digital technician when he resets the TPS and then is done by YOU when you ride. Hold the RPM steady between 3500 and 4000 rpm for a couple of miles, easily done on the freeway. The only thing the dyno will tell you at this point is how well your engine is running. | ||
| Redtail69 |
Well then I guess this is another instance of Buell tech that does not appear to know what he is talking about since he knows that I do not have a TFI or PCIII. Why would he ask me to dyno tune then?  | ||
| M1combat |
He would probably expect you to get a fuel map changing device. A TFI or PCIII. | ||
| Reepicheep |
The timing is adjustable though, and a dyno is arguably the only way to know it is really dialed in correctly. The plot (including AFV) can also let you know if you are somewhat close to optimal, or if your particular setup on your particular bike is totally off the charts. | ||
| Surveyor |
Dyno tuning is the only way I know to establish the effect of modification on your bikes's performance. I ran a dyno check on my bike in stock mode and every time I made a modification there after. The last modification was fitting a Remus full race muffler and the dyno run established that there was increased top end power and a hole in the mid range. running the bike with an open pipe smoothed the power and torque curve and improved the a/f mixture....there is no way I know that you could tune to this level of accuracy without a dyno. | ||
| Fullpower |
the static timing can be set very accurately without running the engine. there is no part of the Buell Electronic Fuel Injection System that is "tunable", with or without a dyno. your dealer technician is quite full of crap. | ||
| Izzinya |
Fullpower SAID : the static timing can be set very accurately without running the engine. there is no part of the Buell Electronic Fuel Injection System that is "tunable", with or without a dyno. your dealer technician is quite full of crap. here here i static time top fuel harleys in my off time and i get them B@LLS on for timing the bike there is no NEED for the dyno if (as said before) you have a power commander, or a techlusion there nothing else to adjust on the buell fuel injection system Izzinya | ||
| Martin |
Is the '05 ecm not 'flashable, unlike the earlier ones? | ||
| Reepicheep |
I understand static timing... but isn't best performance not necessarily at a particular timing position, especially on a modified bike? What I mean is that when you should be at max HP based on the timing, you are actually into detonation, or something else, and costing power. I could be wrong though, I am not an expert, this was always just what I assumed based on common sense. | ||
| Craigster |
I often find more power after adjusting timing during dynotuning. Turbulent combustion chambers require less advance. Sometimes it makes a difference to advance and retard to see what is there. I had a GS1100 show up making 110 hp. Couldn't seem te get the jetting much better. Tweaked his pick-up (which had been timed according to the manual and BLAM - 119 hp. Admittedly we Played around with timing a bit to find the magical 119. Post timing adjustments - Rejetting netted 123 ponies. |
