The voltage regulator keeps 5 V on pump with battery voltage from 7 to 26 Volt. I do not you run flow meter if battery lower 11 Volt to save battery from deep discharge. BorisOut of habit from years of RC car racing, I have been charging mine every time I go running. I guess its not really necessary being the air pump voltage is regulated. I will say I have nothing but good things to say about my Boris meter. Needle settings are very consistent from heat to heat.
Hi, Tony! You are right. BorisHi from the UK, I have seen mention flow meters before on the forum, please elaborate on there use, at present I am guessing they are for setting the main needle in a measured fassion ?
I knew it is possible, but nobody use it. May be low speed needle not critical?I guess you can set the low speed needle also, do you use the throttle stop as a reference point ?
boaters do not use low speed needle,in most cases it is removed.carb is opened fully and flow checked with the boris meter,and main or remote needle is adjustedI guess you can set the low speed needle also, do you use the throttle stop as a reference point ?
Don't even try to get proper reading of HSN with not full open throttle! The LSN is different animal. BorisI would think it would be hard to get an accurate reading on the low speed needle because of the varying bore opening at 1/2 throttle and under? I suppose if you knew of a guy who had a good running scale who could troll up to the line, you could make a feeler type of guage or plug that allowed the carb to close down on it and have the same carb opening for all OS 9B carbs and then take the reading and adjust to the guy with the good setting, as long as all other variables were constant. Might get you close but thats it.
This is exactly I mention in earlier manual. BorisI Have used the Boris meter to set the LSN. On boats I have only used the LSN on OS9b and Aquacraft Vegas carb. I set it to just raise the number slightly when the throttle is at idle. Then as Boris said, you must make sure the throttle is open to measure the HSN.
On .12 car motors, the Boris meter is great!!! You can see the transition from from LSN to HSN. Once I found the best LSN I could adjust the HSN and then correct the LSN back to the baseline.
I run a 9b on my seducer 40,with a purple head cmb 45,sans low speed needle. I know that there are a lot of scale boaters that use the low needle,because they come to the line slow,unlike rigger and mono drivers,who come to the line wfo. even so,none of our boats bog without the low needleSteve, many of us in the NW run the OS 9B carb with a LSN on our .67s. I know all four of mine have the LSN still in use
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