f7ben Posted February 20, 2019 Share Posted February 20, 2019 Posted Today, 08:34 PM Let me share my experience with a setup that runs the same clutch calibration under different power levels. PS-3 is currently setup to run 30psi boost on trails using its auxiliary fuel system. Power output being largely a factor of boost pressure, PS-3 is typically running anywhere from 15psi up to 30psi. This is quite a wide range. Obviously, like others have noted, clutchcalibration needs to be set for the maximum anticipated power level. In this case it is 30psi, As you can imagine, this requires a fair amount of clutch weight to keep rpm at a reasonnable level. The problem with that is the sled may exhibit symptoms of being sluggish at lower boost setting -- and it will to some extent if nothing is done. The other factor to consider is that power level at the end of a wot pull can be 10% lower that at the beginning of a wot pull. As boost pressure increases in the 30psi range, the intake air temperature will increase sharply at the rate of nearly 8F degrees per second. This increase reduces air mass density and therefore the net air mass flow processed by the engine decreases, so is the overall fuel flow to maintain the same lambda target. Less air and less fuel means less power. This adds to the complexity of properly setting clutches for a fixed rpm target. By nature, it is nearly impossible to accomplish nor is it desirable because of fluctuating power output. Enough said. There is a way around that. It is actually simple but involves a certain compromize. The solution is to let the engine rev much higher on the high power setting and get it to rev still high enough at lower power settings that throttle response is still great or as good as with a normal calibration. In the case of PS-3 ,this means operating the engine at 9600rpm at 30psi and let it spin at around 8800rpm at typical pump gas boost pressure of around 19psi. The result is perfect and to be honnest, the sled is a blast to ride at wot at 9600rpm and 30psi boost -- it just screams. The above situation is the extreme of running a single clutch calibration on various power settings due to the wide boost difference between high and low. The short story here is that it can be done quite successfully. That being said, the engine has to be built and configured right to operate at higher rpm levels and a good rpm cut strategy is a must in case of a belt failure during a wot pull. Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 That's between 160-170hp difference on the same clutching Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 @jtssrx @HSR Hello? Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 I asked behn to ask d&d if they run Stock clutching in their race sleds and he freaked out and refused 1 Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 Obviously, like others have noted, clutchcalibration needs to be set for the maximum anticipated power level. In this case it is 30psi, As you can imagine, this requires a fairamount of clutch weight to keep rpm at a reasonnable level. Derp Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 1 minute ago, Rod Johnson said: I asked behn to ask d&d if they run Stock clutching in their race sleds and he freaked out and refused Why would I ask that......your have to be retarded to think that Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 Just now, Rod Johnson said: Obviously, like others have noted, clutchcalibration needs to be set for the maximum anticipated power level. In this case it is 30psi, As you can imagine, this requires a fairamount of clutch weight to keep rpm at a reasonnable level. Derp Right......because it's nearly 170hp difference you brain dead fuck Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 1 minute ago, f7ben said: Right......because it's nearly 170hp difference you brain dead fuck So you need to clutch when you add lots of power cool 1 Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 2 minutes ago, f7ben said: Why would I ask that......your have to be retarded to think that You seem to think they would Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 Just now, Rod Johnson said: So you need to clutch when you add lots of power cool I said stock clutching and a tune... You said impossible You got hard Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 Just now, f7ben said: I said stock clutching and a tune... You said impossible You got hard No of course you can drive it. It’ll just be Shitty and way slower than someone who knows what they’re doing no different than taking a clutch off a 600 and putting it on an 800 and saying it’s perfectly fine because it will drive Quote Link to comment Share on other sites More sharing options...
Ez ryder Posted February 20, 2019 Share Posted February 20, 2019 4 minutes ago, Rod Johnson said: I asked behn to ask d&d if they run Stock clutching in their race sleds and he freaked out and refused I would bet big money D&D has zero idea what Glen is running for clutching . I know bmp has no idea what Kelly is running . they pay the bills give them parts give them access to the shop . before the racers turn those sleds in to the shop or sell they are not set up like they were for the race season Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 Just now, Ez ryder said: I would bet big money D&D has zero idea what Glen is running for clutching . I know bmp has no idea what Kelly is running . they pay the bills give them parts give them access to the shop . before the racers turn those sleds in to the shop or sell they are not set up like they were for the race season Yeah someone here bought one of D&D’s older procross 800 stocker... I beat it pretty good. It’s not fast. Can’t imagine d&d raced it like that Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 1 minute ago, Rod Johnson said: No of course you can drive it. It’ll just be Shitty and way slower than someone who knows what they’re doing no different than taking a clutch off a 600 and putting it on an 800 and saying it’s perfectly fine because it will drive It's nothing like that you dumb motherfucker......because turbo sleds dont have a powerband. Get back to goat fucking junk lsx fag shit and leave it NA because you arent bright enough to do anything but turn a screw on a carb or let hp tuners load a cam tune on your fancy obd2 port Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 Just now, Rod Johnson said: Yeah someone here bought one of D&D’s older procross 800 stocker... I beat it pretty good. It’s not fast. Can’t imagine d&d raced it like that Somebody was probably you.....and everyone beats you like a rented bitch Quote Link to comment Share on other sites More sharing options...
Ez ryder Posted February 20, 2019 Share Posted February 20, 2019 Just now, Rod Johnson said: Yeah someone here bought one of D&D’s older procross 800 stocker... I beat it pretty good. It’s not fast. Can’t imagine d&d raced it like that I know for sure the bmp race sleds are not the same set up they were for the season . he'll the racers won't even let them work on the sleds or let them know what they are running . they only let them pay the bills Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 2 minutes ago, f7ben said: It's nothing like that you dumb motherfucker......because turbo sleds dont have a powerband. Get back to goat fucking junk lsx fag shit and leave it NA because you arent bright enough to do anything but turn a screw on a carb or let hp tuners load a cam tune on your fancy obd2 port Did you seriously just say that turbo sleds don’t have a powerband holy fuck 1 Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 (edited) @HSR @jtssrx Edited February 20, 2019 by f7ben Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 Just now, Rod Johnson said: Did you seriously just say that turbo sleds don’t have a powerband holy fuck Not as it relates to a 2 stroke engine you dumb fuck Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 1 minute ago, f7ben said: Somebody was probably you.....and everyone beats you like a rented bitch Well it wouldn’t be something you would do since you freak out if it doesn’t have Stock clutching Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 1 minute ago, Ez ryder said: I know for sure the bmp race sleds are not the same set up they were for the season . he'll the racers won't even let them work on the sleds or let them know what they are running . they only let them pay the bills I don’t blame them tbh Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 Just now, f7ben said: Not as it relates to a 2 stroke engine you dumb fuck Turbo sleds don’t have power bands!!!111!!2 1 Quote Link to comment Share on other sites More sharing options...
f7ben Posted February 20, 2019 Author Share Posted February 20, 2019 (edited) 1 minute ago, Rod Johnson said: Turbo sleds don’t have power bands!!!111!!2 Exactly....the more boost you run the more power they make. I guess you could say the tiny knob you turn is a powerband. Dumb motherfucker Edited February 20, 2019 by f7ben Quote Link to comment Share on other sites More sharing options...
Rod Posted February 20, 2019 Share Posted February 20, 2019 1 minute ago, f7ben said: Exactly....the more boost you run the more power they make. I guess you could say the tiny knob you turn is a powerband. Dumb motherfucker How can it make more power if it doesn’t have a powerband derp Quote Link to comment Share on other sites More sharing options...
Ez ryder Posted February 20, 2019 Share Posted February 20, 2019 Just now, Rod Johnson said: I don’t blame them tbh fuck no . they have yrs in to making these things winners . you don't give those secrets away so some ass hat can make a kit to sell to every ass hole with deep pockets Quote Link to comment Share on other sites More sharing options...
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