Carb talk
Whats the preffered way to set up a marine carb as far as secondary opening. 40% left, 60% left or 1:1?
Also is there a point to powervalve in a boat. Boost referenced .. dumping 8-10 jet sizes of fuel because I hit 1# of boost (pretty sure thats how it works) seems unnecessary. It`s not a car where you hit the gas every other stop light and need that fuel enrichment. To me (carb newb but fresh eyes) I`d set up a marine application carb with 1:1 primary/secondary and block off the powervalves. Tune it that way. |
dan,the power valve stops it from being to rich in no boost running,when you start making boost you need to ritchen it up.the boost ref blower carbs[quick fuel]come with a 4.5 power valve and on my engines i did not need to change from that.with your a/f gage you will see a steady line almost the same from 2500 all the way up at wot.
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I boost reference both primary & secondary, and have progressive linkage opening of the secondary butterfly's. Why would you not want the motor to tell the carbs what it needs??? I have a great fuel cure from idle all the way to WOT. There are times that my secondaries are just a little open and I m still pulling vacuum. To me blocking off power valves is going back to the stone age
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Rookie boost referencing question . Do I run vac line from these ports on the carbs to ports under the blower in the intake and can I T them or do they have to be separate ?
http://i1243.photobucket.com/albums/...000_0118-1.jpg |
i can see a drag car with no power valve and 8-10 jet sizes larger because it is either ideling or wide open but in a blown boat deal forget it.most of the time the boat engine will be in vacuum or low boost.
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Originally Posted by the deep
(Post 4233199)
Rookie boost referencing question . Do I run vac line from these ports on the carbs to ports under the blower in the intake and can I T them or do they have to be separate ?
http://i1243.photobucket.com/albums/...000_0118-1.jpg |
Originally Posted by mike tkach
(Post 4233200)
i can see a drag car with no power valve and 8-10 jet sizes larger because it is either ideling or wide open but in a blown boat deal forget it.most of the time the boat engine will be in vacuum or low boost.
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Originally Posted by the deep
(Post 4233199)
Rookie boost referencing question . Do I run vac line from these ports on the carbs to ports under the blower in the intake and can I T them or do they have to be separate ?
http://i1243.photobucket.com/albums/...000_0118-1.jpg |
Originally Posted by Bawana
(Post 4233202)
Mike I totally agree with you on that
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Thanks B wan .
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