| Author | Message | ||
     Point_doc |
Has anyone used ECMspy and adjusted there REV limiter? What did you set your REV limiter to? Have you taken your bike past the 6800? Any problems? Thanks | ||
| Hexangler |
You asked the question that I was researching yesterday. I remembered that someone said it was possible. Here is one thing that I found (looks important): http://www.ecmspy.com/eeprom_directory.shtml I have already reset my TPS using ECMspy. I would be interested in the rev limiter mod for another 500rpm out of my 07XB12R Hex | ||
| Dobr24 |
With the new ecmspy changing the rev limits is very easy. Under the other maps tab is the current settings. You can change them to whatever you want, just dont do anything stupid. I would think 500 rpm would be okay, maybe Gunther could chime in? | ||
| Zpyro |
aren't RPM limiters to protect you from destroying/damaging the engine? I'd be very cautious about adjusting it, especially with stock internals/valvetrain. | ||
| Indy_bueller |
I just wouldn't do it at all. They set it where it is for a reason. But, it's your motor...... | ||
| M1combat |
You'll need a fuel map for the higher RPM yes? I think a higher redline is useless for street use. Just MHO. | ||
| Tommy5144 |
I had mine changed. It is 300 RPM's higher. Xopti did it for me when he sent me the new tune w/ the new fuel maps and stuff. | ||
| Point_doc |
Well Tommy, what is your findings after it was done? | ||
| Punkid8888 |
Dobr24 is the new ECMSpy on the ECMspy web page? I have the old version but can't remember what the numbers were. | ||
| Turk |
Playing with fire... | ||
| Tommy5144 |
Paint_doo.....as far as my findings were..the Xopti tune is amazing and made a nice difference in my performance on my 9, things are a lot smoother. I havne't really noticed any change when taking it up to the new redline, but overall the tune itself was great. | ||
| Tommy5144 |
I feel like i wasn't really clear on the previous post.....as far as "things being smoother" it feels like the power is a lot smoother, kicks harder, earlier, and is faster in the top-end. | ||
| Dobr24 |
Yes the new version is 1.11.1. | ||
| Ulendo |
nope - theres a 1.11.2 out already ( running it myself, just opened it to check) incidentally, there are a number of settings that need adjusting to reset the rev limiter - hard and soft limiter, hard and soft kill, and there are timed limits, as well - still figuring those out myself. I've played with a lot more than +300 rpm on the 9Sx...carefully, on the dyno, with a gas analyzer, checking everything!!! I dont recommend playing with the limiters if you dont have access to a full tuing shop. as for 'why a rev limit' - no ones mentioned that it might have to do with emissions, especially euro, or california. if you want to figure the relative redlines/internal speeds of engines, figure it as the # feet per second ( minute, whatever) the piston will be moving at any given rpm. eg: a '12' at 6900 rpm is moving the piston about 73 ft per second. a '9' at 7400 rpm is only moving it at approx 64 ft per second.....reverse engineer that, and you'll find that a '9'at 8400 has the same piston speed as a 12 at 6900........give or take things like valve float, bent rods, or whatever may fail first. (Message edited by ulendo on April 29, 2008) | ||
| Xbswede |
I bumped mine 200 rpm. No issues other then am not constantly hitting the rev limiter between 1st and 2nd. | ||
| Zpyro |
ulendo that doesn't really tell you what the redline is. for all we know our engines will blow up at 8k rpm. or they may go at 10k rpm. point is, it's dangerous to play with, especially with a stock engine/valvetrain | ||
| Turk |
and bottom end. Gas analyzers do nothing to evaluate part fatigue. And it's about more than just piston speed and valvetrain. | ||
| Treadmarks |
Mine has been bumped up by xopti as well. Since I have forged pistons, I figured WTF...I have not bumped into it yet, but since the engine is still pulling so hard up top....we will see. | ||
| Bombardier |
Gotta be a reason why Buell went to a bigger crank journal BEFORE raising the redline a smidge. Conrod failures have been reported with the standard redline so I would not be keen to raise it without improving the bottom end if I was after reliability. My 2 cents. | ||
| Turk |
I wonder how much durability testing with a focus specifically on rev limit Xopti or any other tuning shop have done. "I haven't seen a problem yet" doesn't really qualify as testing. | ||
| Hexangler |
Don't the race ecm's have a higher rev limit? Many people install them without stronger than stock motors. I put a screaming eagle ecm on my 99XL12S which raised the stock revs 300rpm. No problem for the first 60K miles. Hex | ||
| Xbswede |
No. The Race ECM is set the same as the Stock ECM as far as Rev limits. | ||
| Hexangler |
Thanks. | ||
| Slaughter |
If you have not balanced/lightened the flywheel/crank/rods/pistons and built up your bottom end, setting up a higher rev limit is just begging for trouble. Higher RPMs and hitting the rev limit is EXTREMELY hard on these engines bottom ends. (Message edited by slaughter on April 30, 2008) | ||
| Reepicheep |
Shoulda bought a nine!  I thought my 05 XB9SX race ecm (since pulled and sold) had a slightly higher redline then stock? Not a lot, a few hundred, but enough to eek out another 5 HP or so. Maybe the 9 race ECMS can afford to over rev because of the lighter internals, and the 12's couldn't. Or maybe I am remembering wrong. They also improved the oil pump before they bumped up the RPM limits on the newer XB12's. | ||
| Slaughter |
I DO have a 9 and the full race module. It's bored out to 3.8125 (1169cc) - so with the lighter pistons and bottom end, it revs QUICK. The 3.125 stroke of the 9 is perfect. I have a fully balanced and lightened system. I also bumped the redline to 8000 but put a soft rev limit at 7800. For longer races, I set the rev limit back down to 7500 with a hard limit at 7800. (Message edited by slaughter on April 30, 2008) | ||
| Id073897 |
They also improved the oil pump before they bumped up the RPM limits on the newer XB12's. They improved the crankpin before they bumped up the RPM limits. Regards, Gunter | ||
| Blake |
Race ECM doesn't increase the hard limit, but I think it gets rid of the soft limit(s). | ||
| Ulendo |
should have explained more - I work in a bike shop, with our own dyno. The runs involve watching a lot more than just the gas analyzer: it actually took 3 people to watch all the crap I had hooked up the other weekend - everything from aux oil temp, and pressure sensors, to making sure the mixture & timing werent going to cook a piston. I was mostly trying to stress that its not an area for the average user to experiment, and is best done in a proper tuning shop, with full gear. as for the token naysayers - worry about your own wheels, and quit boo hoo ing guys who push the limits. I think theres a guy on here named Erik who didnt just toe the line, and accept 'common (non)sense as gospel... | ||
| Bombardier |
Thanks for the feedback. You can look at data till your eyes drop out of your head but I defy you to be able to tell exactly at what point the conrod will deform and bash the shit out of your engine internals. Yes you can raise the rev limit with ecmspy. It is not wise to do so as has been made apparent by people who have a great depth of knowledge about this particular bike. My 2 cents worth.(which is incidentally a lot less than what it will cost to find out if raising the rev limit was the wrong thing to do) |
