one carb or two
#1
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one carb or two
if a wally 663 will support a 23cc single, would it support a 45cc twin? i am trying to avoid tuning issues with two carbs, or am i blowing it out of proportion?.....
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RE: one carb or two
Yea,just get a WT 201, 13.!@#$MM venturi,its a DA 50 carb,a proper 25cc carb wont work on 45 correctly,you can run it though,just loose to end, as a matter of fact i happen to have used excellent wt 201 i can sell you.
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RE: one carb or two
ORIGINAL: savagecommander
if a wally 663 will support a 23cc single, would it support a 45cc twin? i am trying to avoid tuning issues with two carbs, or am i blowing it out of proportion?.....
if a wally 663 will support a 23cc single, would it support a 45cc twin? i am trying to avoid tuning issues with two carbs, or am i blowing it out of proportion?.....
Two carbs side by side on the crankcase may be a very good idea, if the second carb is set up to open above 3/4 throttle. This will provide much better mixture control at half throttle, and better throttle linearity. (not tuning for best power here are we?)
First tune the low throttle carb all by itself with only the low carb active, then the high throttle carb all by itself with only the high carb active. Finally, adjust the high throttle carb H-needle for best power, with both carbs active.
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RE: one carb or two
id like to keep it to one carb if possible, but all my math points to two. the motor would be split case (and unfortunatly heavy) two coils, two carbs, two cases. i was hoping to just plumb the carb to both intake ports. i dont think the 201 would help much, as the 663 is 12.7mm
#9
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RE: one carb or two
""Ask any owner of a British motorcycle""
sorry for changing the subject,, but there is a big difference between a 4st Jett & Slide Needle carb and a Walbro carb,,
actually if you have lived and rode threw the 60s 70s and 80s a Jett & Slide Needle carb is not at all hard to tune, even twins..
Jim
sorry for changing the subject,, but there is a big difference between a 4st Jett & Slide Needle carb and a Walbro carb,,
actually if you have lived and rode threw the 60s 70s and 80s a Jett & Slide Needle carb is not at all hard to tune, even twins..
Jim
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RE: one carb or two
ORIGINAL: savagecommander
this is what the crank will look like. split case, two stroke.
this is what the crank will look like. split case, two stroke.
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RE: one carb or two
ok. now if the pistons were moving in unison, the motor would be "larger" to the carb, right? now, do you think a 12.7mm carb would hold against a 45cc twin? they perform well with 30.5cc but thats about as big as ive seen
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RE: one carb or two
ORIGINAL: savagecommander
ok. now if the pistons were moving in unison, the motor would be "larger" to the carb, right? now, do you think a 12.7mm carb would hold against a 45cc twin? they perform well with 30.5cc but thats about as big as ive seen
ok. now if the pistons were moving in unison, the motor would be "larger" to the carb, right? now, do you think a 12.7mm carb would hold against a 45cc twin? they perform well with 30.5cc but thats about as big as ive seen
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RE: one carb or two
9mm? wow. my .32 used a 9mm carb... im HOPING to fit the motor into a car, and i'll consider myself lucky if i can get 15k out of the motor( i cant imagine id need much more than that) then again, if i got creative with some fiberglass and made up a plane id be set for a motor. thnx for the help guys