| Author | Message | ||
     Puzzled |
Has anyone wired one into an 1125 yet? I did some searching and calling around today. My first call was to Randy at Pingel. He has no first hand knowledge of the 1125 so he could not recommend anything. He referred me to Dynatek. I called them and they couldn't tell me if the Dyna DRL-400 would work with our ignition or not. He did state that they do use them on the Destroyer V-Rod. Ok moving on, MSD has their version called a Launch Master. It will not work with a CDI ignition. I truthfuly don't know what a CDI ignition is let alone what our 1125 ignition is! MSD, •Easily set an rpm limit to use for the launch. •Matching connectors for easy installation. •Delivers firm, consistent holeshots. The MSD Powersports Launch Master is a universal low RPM limiter. It will provide consistent launches and quicker 60-foot times by setting an rpm limit to stage with. Once the green light comes on, release the clutch and take off - but be sure to hold on! The rpm is adjusted with two built-in rotary dials ranging from 1,800 - 9,900 rpm in 100 rpm increments. A handy LED shows when the launch rev limit is active. Dyna DYNA DRL-400 Two Stage Rev Limiter The Dyna DRL-400 Two Stage Rev Limiter has been specifically designed to maximize launch performance and over-rev protection in drag racing. The DRL-400 allows a precisely controlled launch rpm limit to be set, while also guaranteeing against over-rev damage due to missed shifts or drive train breakage. Selection between the launch limit and the upper over-rev limit is usually made through the use of a clutch lever switch. Both rpm limits are adjustable via two knobs on the DRL-400. The DRL-400 constantly monitors the engine rpm with great precision and randomly deletes ignition pulses to hold the engine exactly at the desired rpm. The DRL-400 can hold a 270 horsepower engine to a steady launch rpm with less then +/- 50 rpm wavier. Other launch rpm limiters typically make the engine rpm waive through a pounding oscillation. This can be very hard on expensive racing components. The DRL-400 works with all inductive electronic ignitions on 2 and 4 cylinder engines. It is housed in a 3 3/4" x 2 3/8" x 1" plastic case with integral mounting flanges. DRL-400 Features: •Accurate launch limiting with 32 different settings Smooth, non destructive launch limiting •Adjustable high limit between 16 different settings } | ||
| Bott |
can't help with your question-but remember this: once that clutch lever is out,you are at wot in first gear! Running bars I know you will be fine, but for anyone running swb-it's gonna get REALLY stood up.... | ||
| Puzzled |
I called Dyna and they stated they don't have anything for the coil on plug 1125. There are V-Twin units however they don't have the high RPM limit that is needed. MSD said they had a unit that they tested but did not see the response that they thought they would so the product did not go to market. Hearing this I started looking at single stage units as the bike has its own limiter. I need to make some calls to find coil on plug units. Ford Mustangs use this set up however I'm not sure if I can only use two of the eight legs. So I need to start calling tech lines. | ||
| Fast1075 |
Another possible option would be a throttle stop...not nearly as good an option as a 2 step...but it would be workable if you can get the switching in time...(the throttle stop must be opening before the clutch engages or it will fall on it's face if the clutch engages at part throttle...if the throttle come in too soon, it will bounce the rev limiter before the clutch engages)... | ||
| Alex |
Call Erik Buell Racing. The full race ECUs have a "pit lane limiter". One could probably use it as a stage limiter. You could even use the clutch switch as activator for the limiter. But be aware: using the pit lane limiter under full throttle really sounds insane. Sometimes our driver Harald uses it for fun taking me close to a heart attack as it sounds like the engine will explode right now. Regards Alex M-TeK Engineering/Pegasusraceteam | ||
| Bott |
Alex: thanks for joining in the Drag racing area! Now that you are here, I have a question along the same lines. Wondering if you have any type of launch/wheelie control programmed into your bikes? I know your roadrace launches are critical as ours are, So I would assume something is programmed in....yes? Thanks! | ||
| Alex |
No, Harald launches without any electronic help. We do not have a wheelie bar (as You know of course) so he has to let the clutch go while opening the throttle carefully as snapping the clutch would result in a huge wheelie. There is no launch or wheelie control on board of the bikes. There´s only the pit lane limiter (which we normally don´t use), an up shift ignition interrupt and a mechanical slipper clutch to make Harald´s life easier. Otherwise it is traditional racing a bike. Regards Alex | ||
| Fast1075 |
In drag racing, any control that operates on feedback to alter the throttle position or directly control wheelspin is illegal. Some time ago, some ingenious fellows were running such a system in Pro level ET car racing... The system monitored time to distance, speed and wheelspin by using front wheel speed sensors, crank rpm sensors and rear wheel speed sensors. They also tied in the trans brake so they staged in the exact same spot every pass...the system used throttle stops and nitrous so the car would slow or speed up as needed as it reach the comparator points in the programming... One fellow took it further by finding the wavelenght of the amber bulbs at his local track and built a system that sensed the amber lights on a Pro tree... I saw tech inspectors using magnets to check the wheels for magnets that were installed and power coated over to hide them...the sensors were embedded in the brake calipers...the wiring was cleverly hidden in fake brake line coverings... At the last Pro Star race I ran at, I had to unbundle the wiring to my legal linelock to prove it was not tied to a control other than my 2 step button. They looked for sensor magnets in my sprockets. | ||
| Puzzled |
Alex you were right on with the E B R adjustable ecm. Speaking with Michael at E B R confirmed this. According to UPS my adjustable ecm will be here Tuesday. This will help with my launches. I should be able to get my 60' times in the 1.4's now. The ability to hold the throttle Wide Open right at launch will definitely help all the way across the board. I need to find 6MPH at the 1/8th as that is what I seem to be giving up to Mike (9.6's) and Joe (9.5's). |
