synchronizing carbs
Senior Member
1st Gear Member
Joined: Jul 2007
Posts: 5,655
From: Coastal NC
RE: synchronizing carbs
ORIGINAL: mmi86
they also have a new Digital sync gauges and the box is only a little bit bigger than a blackberry, they only bad part is you have to cut off your arm to pay for it
they also have a new Digital sync gauges and the box is only a little bit bigger than a blackberry, they only bad part is you have to cut off your arm to pay for it
you can wire up the map sensors and leave them in the bike somewhere hidden and out of the way and just leave wires to each sensor at a connector under the rear seat. with 5 volts going to the sensors they will have an output voltage relative to the vacuum and you can read the voltage output on the multimeters.
total cost about 30$
there is even a refference chart for how many inches of mercury each voltage reading indicates.
(DISCLAMER) i've never done this on a bike. I'm new to bikes, but i've been a gear head for a long time and sold my 400whp mid engine 2 seater to get the wife to let me get a bike.
Super Moderator
Joined: Jun 2005
Posts: 7,044
From: So Cal
RE: synchronizing carbs
ORIGINAL: Kohburn
you can make your own digital version for cheap if you don't mind scrounging for parts. you can go to a "u-pull-it" yard and get the map sensor out of GM FWD cars (get one per carb) - then a cheap digital voltmeter for about $5 each.
you can wire up the map sensors and leave them in the bike somewhere hidden and out of the way and just leave wires to each sensor at a connector under the rear seat. with 5 volts going to the sensors they will have an output voltage relative to the vacuum and you can read the voltage output on the multimeters.
total cost about 30$
there is even a refference chart for how many inches of mercury each voltage reading indicates.
(DISCLAMER) i've never done this on a bike. I'm new to bikes, but i've been a gear head for a long time and sold my 400whp mid engine 2 seater to get the wife to let me get a bike.
ORIGINAL: mmi86
they also have a new Digital sync gauges and the box is only a little bit bigger than a blackberry, they only bad part is you have to cut off your arm to pay for it
they also have a new Digital sync gauges and the box is only a little bit bigger than a blackberry, they only bad part is you have to cut off your arm to pay for it
you can wire up the map sensors and leave them in the bike somewhere hidden and out of the way and just leave wires to each sensor at a connector under the rear seat. with 5 volts going to the sensors they will have an output voltage relative to the vacuum and you can read the voltage output on the multimeters.
total cost about 30$
there is even a refference chart for how many inches of mercury each voltage reading indicates.
(DISCLAMER) i've never done this on a bike. I'm new to bikes, but i've been a gear head for a long time and sold my 400whp mid engine 2 seater to get the wife to let me get a bike.
RE: synchronizing carbs
ORIGINAL: Kohburn
you can make your own digital version for cheap if you don't mind scrounging for parts. you can go to a "u-pull-it" yard and get the map sensor out of GM FWD cars (get one per carb) - then a cheap digital voltmeter for about $5 each.
you can wire up the map sensors and leave them in the bike somewhere hidden and out of the way and just leave wires to each sensor at a connector under the rear seat. with 5 volts going to the sensors they will have an output voltage relative to the vacuum and you can read the voltage output on the multimeters.
total cost about 30$
there is even a refference chart for how many inches of mercury each voltage reading indicates.
(DISCLAMER) i've never done this on a bike. I'm new to bikes, but i've been a gear head for a long time and sold my 400whp mid engine 2 seater to get the wife to let me get a bike.
ORIGINAL: mmi86
they also have a new Digital sync gauges and the box is only a little bit bigger than a blackberry, they only bad part is you have to cut off your arm to pay for it
they also have a new Digital sync gauges and the box is only a little bit bigger than a blackberry, they only bad part is you have to cut off your arm to pay for it
you can wire up the map sensors and leave them in the bike somewhere hidden and out of the way and just leave wires to each sensor at a connector under the rear seat. with 5 volts going to the sensors they will have an output voltage relative to the vacuum and you can read the voltage output on the multimeters.
total cost about 30$
there is even a refference chart for how many inches of mercury each voltage reading indicates.
(DISCLAMER) i've never done this on a bike. I'm new to bikes, but i've been a gear head for a long time and sold my 400whp mid engine 2 seater to get the wife to let me get a bike.
Senior Member
1st Gear Member
Joined: Jul 2007
Posts: 5,655
From: Coastal NC
RE: synchronizing carbs
the tolerance is pretty darn good if you go the extra step of putting a very fine trim pot (potentiometer) inline on each sensor. then use a couple T fittings and feed all 4 from the same source. then adjust the trim pots untill the millivolt reading from each is the same. From there the range of the reading is :
if you use a manual hand vacuum pump with a gauge on it like you would get at autozone then you can find out the exact voltage to 1/1000 of a volt for a particular vacuum setting.
once its setup its really quite accurate.
if you use a manual hand vacuum pump with a gauge on it like you would get at autozone then you can find out the exact voltage to 1/1000 of a volt for a particular vacuum setting.
once its setup its really quite accurate.
Senior Member
1st Gear Member
Joined: Jul 2007
Posts: 5,655
From: Coastal NC
RE: synchronizing carbs
ORIGINAL: zzrick
Kohburn = mcguyver
Kohburn = mcguyver
yeah i've got it still as a suvenier
Senior Member
1st Gear Member
Joined: Jun 2007
Posts: 8,820
From: Liberty Twnshp, OH
RE: synchronizing carbs
ORIGINAL: Kohburn
lol - thats actually a nickname of mine - you should have seen me on the side of the road at 1am int he middle of nowhere virginia cutting the side out of a dumpster with a pair of tin snips, using a hatchet and a screw driver to pound holes in it and bend it to shape to hold the two halves of my broken (snapped in half) clutch bracket together so i could finish my 7 hour drive home from college.
yeah i've got it still as a suvenier
ORIGINAL: zzrick
Kohburn = mcguyver
Kohburn = mcguyver
yeah i've got it still as a suvenier
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