when compressor kicks in, high current (ampere) is drawn from the electrical system, hence a drop in the voltage in that split second n you feel the power lose or jerk. a battery works like a spare tank to fill the gap. but a battery only fill in at 12.5v andbelow. our normal operating situation the voltage is 13~14v so from12.5v~13v the electrical system will depends only on the alternater n ecu voltage correcting system which have 1-2seconds delay.
a high capacitor or VS helps to fill i the 13-14v gap. so reduce the power loss/jerk.
those commercial selling VS had <100,000uf helps a little in this jerk.
I had DIYed a 60,000uf VS for my BLM, not much help.

for BLM- low power car with High power loading Air con.. what u expect?

for curious guys, test before u buy loh....

[quote=coolkwc,Oct 10 2010, 07:25 PM]
If you did measure the voltage fluctuation before, u will notice the voltage drop during compressor kickin is <0.5V by <0.5s, which is negligible compare to the huge breaking torque. Thats why i said there no noticeable improvement if install VS.
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that it.. the 0.5v 0.5sec dip causes the drag. if u fill up this, then u will feel smooth.. see, the higher the caps will fill up this gap, the smaller gap, less jerk. good grounding cable also helps.
another good point for VS is, it acts as a filter for most surge/transcient voltage, smoothen the spicky voltage hence reduce the failure of electrical/electronic items eg. bulb/radio/ecu/battery......it is still recommended to have one to protects. eg. when compressor on/off/on/off time, spicky/dirty voltage occurs n this would be transfer to all components connected, a VS will absorbs it. Try connect our BLM to a osciloscope to see the edgy spike voltage.
(a analog sanwa meter don't help.)

This post has been edited by goohtj: Oct 10 2010, 10:01 PM

clean the filter at the dashboard drawer.
spray frebreez in it, wetcarpet area.
start car, on blower with acon off for 10 minutes to dry the condensation.
put pandan leafs.
normally bad smell is caused by wet carpet.

better charge up the battery fully. less constrain to car alternator and car have more power.

send to battery shop.
for me. i invested a battery charger, charge my car every 3 months.. car less drag.

I bought it at pasar road <rm100. just clip it at battery terminal , let it charge overnight. easy. like u charge handphone..