If I came across as bashing HL I DID NOT MEAN TOO ...I stated that we are lucky to have them, BUT again, When they contantly state their module is the greatest thing since sliced bread....Well.....see my point, It may in fact be the most refined or most powerful module out now, but It cannot add any timing only keep the timing at 28 degree's which is what i think it does and better than the rest..... I think it somehow keeps the timing at 28 all the way to redline.....but for them to start telling p633 that the module will make more power than the CDI down low and we may blow or motor going to 9200 rpm, when if he knew we would never be able to reach that high rpm anyway just reinforces my other post.......They are a business and will push THEIR product come hell or high water........and any business will do that....I'm not bashing HL.... I AM glad they are around, but I know these module's been there, done that, and they simply will not compare to the remapped CDI that is coming out and HL should not claim their module will outperform the CDI when we all no better.......anyone see my point now???[img]i/expressions/face-icon-small-shocked.gif[/img]

 

But we have to wait until the CDI comes out to see if its worth the extra $$$. I do love the idea of plug and play. It makes it much simplier to switch out the new CDI if you have to take your ATV in for repairs. Then you can be assurred your mechanic won't try to void your warrenty.

 

Amen, I'll have my HL mod probably tuesday! we'll see what happens!

 

kawi engineer, sorry so late

 

Kawieman700

Get that 700 ready to pull!!!!

 

Prairie 633
Any results on the module tests? I talked to Don/Dan at H/L and voiced concern that the rumor was that their module did not work on the 02 prairrie and was going to cancel my order. He asked me to give his product a chance, he was unaware of anybody that had an 02 had returned their H/L module. And, If I was not satisfied with his product he would give me a full refund. My view is that some will prefer the module and some will want the CDI. I think if the H/L Module gives me power like my DG above 10-15 MPH I'll be happy. With the mods I already have to choose when when I can give it full power, its hard to steer with your front end in the air[img]i/expressions/face-icon-small-happy.gif[/img]

 

TuffEnuff, I have spoken to Don and the engineer at DG, but I can only talk to Dan at HL, no engineer. DG said they would help me with the tests, and HL said they were not interested in any tests? I have mapped all of the timing curves for your igniter as well as the Prairie 700 version, and V-Force (no module). The only difference I have found in the modules is the output frequencies. DG is under 1kHz and HL is over 10kHz. Both outputs are 0-5 volt clocked signals. My 2002 igniter will never advance past 10 degrees for any frequency over about 5.4kHz, so the HL module isn't "seen" by the igniter. The symptom will be a lack of mid range and top end power. The later version igniter can "see" up to about 11kHz, although the timing effect doesn't indicate any advantage over the "trigger" frequency. I have consulted with some of the more experienced people on the subject of frequency, (thanks Red650), and they agree that a higher frequency up to a point, will help the mid range power. They said they are not aware of a way to see the effect from the timing measurements, but that it is easy to "feel" it. Until I have the opportunity to conduct the accelerometer tests on a stock Prairie 700, I will not make any conclusions. The calculated frequency for the HL module is within 5% of the measured frequency, based on the part values they used in the timing circuit, so I think my device is operating properly. For a matter of reference, every 100Hz is about 5 MPH of speed with 25" tires, so 1kHz is about 50 MPH, and 10kHz would represent about 500MPH. I will have both modules, and one with an adjustable frequency for the acceleration runs. I will use these tests to compare with the new cdi's when I get one. If I had the mods that is in your listing, I would go with the new cdi. That way you get the double benefit of true timing over 28 degs and increased rev limiter. While some people say 8500 RPM is enough, I am investigating a claim and something I have witnessed that seems to point to some sort of "pre-limit", or "soft limit" around the 7500-7700RPM range that may be cutting one or both sparks at some interval, like 1 out every 5 firings. The "hard" limit at 8500 RPM cuts both sparks completely. If this is true, and again, I have not confirmed this yet, than going with the new cdi will probably eliminate this completely. I will conduct the runs as soon as possible. I have to coordinate the borrowing of someone's P700 with the weather. This weekend was a washout.

 

I think you're right about the lower 'soft' limiter on the stock CDI. There seems to be more to the drop off at 6,500 rpm than just timing retard. My P650 get's 'magically' rich at the top end with the stock CDI. I never thought about the spark not firing every time, but that may explain it. Your result will definately be helpful to all of us.

Peace,
Sgt_Rock