So why is it that.....
12-02-2010 | 07:51 PM
#1
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From: Salinas,
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So why is it that.....
On twins almost everyone blocks off the intake ports and installs a single reed block? It would seem to me that simply putting plates over the intake ports would not be a great idea flow wise. It also seems to me that dual carbs is not a big deal to set up. Maybe 2-strokes are different but my old VW was very easy to set up with dual Webbers. Making linkage on a one-of basis might be challenging but for a semi production engine it would not be a problem. Hmmmm?
12-02-2010 | 10:10 PM
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From: Salem,
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RE: So why is it that.....
they generally use one large carb because of weight savings, everyone in the rc airplane world wants to save any weight they can lately
12-03-2010 | 05:55 AM
#3
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RE: So why is it that.....
It is a difference if you are talking about Boxer or In-line engine.
Boxer (Flat twin) 2-Stroke engines uses the same Crankhousing room. So it makes no sense to use 2 carbs. One is enough.
In-Line 2-Stroke engines have single crank house space. Both chambers are seperated by the middle bearing with seal ring.
Here you can use 2 carbs. But mainly the manufacturers uses Y- intake header. Cheaper, but there is space for some tuning.
Boxer (Flat twin) 2-Stroke engines uses the same Crankhousing room. So it makes no sense to use 2 carbs. One is enough.
In-Line 2-Stroke engines have single crank house space. Both chambers are seperated by the middle bearing with seal ring.
Here you can use 2 carbs. But mainly the manufacturers uses Y- intake header. Cheaper, but there is space for some tuning.
12-03-2010 | 06:45 AM
#4
RE: So why is it that.....
ORIGINAL: Scota4570
On twins almost everyone blocks off the intake ports and installs a single reed block? It would seem to me that simply putting plates over the intake ports would not be a great idea flow wise. It also seems to me that dual carbs is not a big deal to set up. Maybe 2-strokes are different but my old VW was very easy to set up with dual Webbers. Making linkage on a one-of basis might be challenging but for a semi production engine it would not be a problem. Hmmmm?
On twins almost everyone blocks off the intake ports and installs a single reed block? It would seem to me that simply putting plates over the intake ports would not be a great idea flow wise. It also seems to me that dual carbs is not a big deal to set up. Maybe 2-strokes are different but my old VW was very easy to set up with dual Webbers. Making linkage on a one-of basis might be challenging but for a semi production engine it would not be a problem. Hmmmm?
Sincerely, Richard
