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Originally Posted by preludesh01201
I always thought i had a version 2 because it has a map limiter, but i just pulled the unit from the car (stored for winter) and i relized i only have 5 switches w/map limiter. When i dyno'd last year i had a horrible drop in power around 6300- to redline. The J&S was pulling some serious timing about 4 to 5 led's on the dual monitor. So now with this new news i wonder if i can solve my problem cause my car too has a bit of hesitation down low. Well i wonder if this new info applys to me but heres my settings. Sensitivity around 1 o clock ( to high??) Switches-1 up, 2 down, 3 & 4 up, and 5 down. Boost start- all the way clockwise and retard rate- all the way couinter clockwise( so the function is disabled?). Last i have the map adj. all the way down off so 7 oclock. Does this sound correct and should 3&4 be down? Also my unit is identicle to the second pic on J&S's site! Thanks guys
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You've said quite a bit in only a few words, let me try to address each issue you brought up. 'Version 2' units include the MAP limiter. Some have come with 5 DIP switches, some 6.
If the J&S was pulling timing in the high end, and you know this because the knock LEDs were lit, then the J&S is doing its job, pulling timing for something that it hears. What I am addressing in this thread--the RPM retard function associated with switches 3 and 4 and their impact on timing between 2500-4000 RPM--does not apply to what you have described.
However, if you are having 'hesitation' in the low end, it
could be related to how you have switches 3 and 4 set. It could also be related to your tuning. Do note taht if you have both these switches up, the unit is pulling
up to 8 degrees of timing above 5 psi between 2500-4000 rpm.
Sensitivity at 1 o'clock
could be too high. With it set that high, it
may be causing the J&S to pull timing in the high end as you described. But, it could also be that you were indeed experiencing detonation. What I can tell you is that most people, including me, set the sensitivity around 10 o'clock. I leave it up to you to choose where to set it.
Do you have the MAP limiter wired up, and do you want to use its function? If yes and yes, then you need to calibrate it properly. There are instructions on the J&S site on how to do that.