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Hi, Which SUV vehicle is this ? Can I guess Landcruiser ?

Hi, Sorry, been away a while. Greg correctly explains the FIA's "logic", but I believe the change is more driven to close up the field - as FRIC has been around for quite a while without objection. The real issue is that some teams really understood what could be done, and took advantage of it...

Simon, I have Tuneboy, and yes I can change ignition too, but I haven't changed it at all. I've talked to the local dyno guys, and they had suggested I build a few maps that run well and then make a run with each of the maps to see which is best. ( They don't want to use Tuneboy to tune...

Brian, Thanks for the comment - it seems very logical to me and in line with my own thinking. At the bottom end, the bike stock (with CAT and closed loop control)ran OK but was always notchy/digital/jumpy at small throttle, and the extra fuel it has now has certainly smoothed that out...

Update : The weather has improved and it is riding time. The bike is running great with a map I downloaded from Tuneboy, but my datalogging shows I'm down at 12:1 AFR at idle, 12.5 at cruise and 13.7 at higher throttle/RPM. To me that's a bit backwards - I'd expect to want to be lean at cruise...

Thanks for the posts - it appears that my suspicion was correct and there's math being done on top of the Alpha-N map. Now looking forward to a chance to run the bike and see how she performs with the changes...

Update : Based upon the comments I purchased the Tuneboy system, which has allowed me to flash new TP/RPM/Fuel maps direct to the ECU. Each cylinder has it's own map. I also purchased a wide band O2 sensor, from which I can collect TP/RPM/AFR data, and I can then use the Tuneboy software to...

Good informationn from TC3000. Just to stress one point - as TC3000 mentions - make sure you instrument to look at what the damper is really achieving in terms of velocity. Motor RPM and stroke are not at all adequate to predict it.

Thanks guys, I've dropped a mail to Tuneboy to see what they have for my bike.

Yes, I've seen Tuneboy, and there's also Bazazz. Each seems to have supporters and detracters - my belief is that they all work well, but some users are more skilled at implementation. Cost is a consideration, but it's more the efficiency of the execution that I'm looking for. Your posting does...

dgallup, no such luck with my Italian machinery. I can pay for a reflash, or buy the Power Commander (which then gives me the ability to map it myself). Cost is similar, but of course with the latter route I can then make future updates as I please. The second step is how to deduce the new map -...

Brian, Wanting to have a clean solution I had asked DynoJet about this and they replied : "If using Auto-tune, you need to make sure that Auto-tune is disabled in the stock closed loop range to keep the Auto-tune O2 sensors from fighting with the stock O2 sensors. You do this by entering a...

Thanks for the replies. I agree that a pull of the plugs is useful to check for appropriate mix. The posted replies suggest to me that the stock system likely has different high end maps for the two cylinders, and also that the Power Commander makes its change as a delta from the base map...

Hi, I'm about to purchase a fuel map device for my Hypermotard. As background, the stock system has a single O2 sensor located after the two header pipes come together which provides a signal for closed loop feedback at low throttle and rpm. (<20%throttle, <5,500rpm). Above this range the stock...

I suspect it is due to the compressibility of the air. Normally there is no flow until full pressure is reached and the regulator cracks, by which time the bubbles have become roughly 1/4 of their original size. ( 3 bar gauge pressure system, neglecting T ). By allowing the bypass, the bleed...

Hi Golfpin, I think your observations have merit. The Austin suspension was coupled front to rear in an in/out coupling, meaning that if the front suspension was compressed, the rear would extend and vice versa. This coupling was good for single axle bumps (speed bump...

Bluly, MR does not lend itself well to your idea. The characteristic of the MR fluid is not velocity sensitive - such that the damper output under a constant control input looks more like friction than it does damping. This paper shows the characteristics...

Murpia, There is no step in the bore and the piston can move freely dependent simply upon the pressure differential experienced. A operational travel limit isn't needed as the fluid volume is calculated such that the piston will not escape the desired the operational position range even at full...

Hi, For some "sales" work I need to attach a shell to an ADAMS view model to make some pretty animations. The shell I have to use is an OBJ file, which has an associated MTL file. ( The MTL file includes the surface properties such as color.) When we import the OBJ file file to ADAMS, it...

Greg, Thanks for the idea - a quick experiment might be the best approach. I was hoping someone might have experience with these tires already - but it appears no luck..