Single Or Dual Carbs

[WaveDemon]

I think I'll have a good test for set up comparison. I have a ported set up with a single carb (61x case). Wahoo has a ported set up with dual 44's from Magoo (62t case). I guarantee I win a race to wave jumping speed (I've ridden both already).

 

[Matt_E]

There's other factors, though. The duals could be tuned worse than your single, for example.

 

[ski4]

this is all so confusing:17:

 

[WaveDemon]

I take back my race idea, it's not a fair race. I have much more displacement.

 

[Matt_E]

That would be a factor, yes. :wink: :arms:

 

[WaHoo_1]

bottom line...not saying one or the other is better....both have their attributes depending on what set-up you're running with. But I will say when you run a single- you're in effect giving up free horsepower no?

 

[WaveDemon]

bottom line...not saying one or the other is better....both have their attributes depending on what set-up you're running with. But I will say when you run a single- you're in effect giving up free horsepower no?

not free. my point is that with a second carb you are giving up a little down low to gain up top. I want down low. I could be wrong. I havn't proven what I'm saying, it's just my understanding about how motors work. everything I'm stating definatly work in other motorsports.

 

[unclehulka13]

low is better than high, most of the time.....

 

[Matt_E]

not free. my point is that with a second carb you are giving up a little down low to gain up top. I want down low. I could be wrong. I havn't proven what I'm saying, it's just my understanding about how motors work that definatly work in other motorsports.

I think there may be some merit to this. Perhaps, in some dual applications, the air speed through the carbs is pretty low, especially at bottom end. This in turn can lead to a weak signal. Depending on the carbs, that may contribute to poor response. A single wouldn't have this problem, as the air speed would be higher.
However, with properly set up duals that can safely operate in the low air speed environment, results should be nearly the same.







Wow. Did I say that? :Banane01:

 

[WaveDemon]

I think there may be some merit to this. Perhaps, in some dual applications, the air speed through the carbs is pretty low, especially at bottom end. This in turn can lead to a weak signal. Depending on the carbs, that may contribute to poor response. A single wouldn't have this problem, as the air speed would be higher.
However, with properly set up duals that can safely operate in the low air speed environment, results should be nearly the same.







Wow. Did I say that? :Banane01:

you are nailing the issue. :arms:

 

[Matt_E]

I think the problem would be most pronounced with BIGASS dual carbs (ie dual 50mm carbs on a 650 or some such nonsense)

Or with racing carbs, i.e., buckshot.

I'd venture a guess that popoff and jet size need to be more carefully adjusted than on single.

 

[WaveDemon]

The original question still needs to be answered single or dual.

If not for performance single still has one less entrance for water to enter, easier to tune, cheaper, and probably more reliable.

 

[Matt_E]

Yeah, I agree with all that. If I didn't already have duals on my boat, I'd have a single, for sure.

However, money aside: I think that properly adjusted duals will be better throughout the range.

(On 62T cases!)


I have a beef on the reliability issue. Sure, "theoretically" a single is more reliable. But how is a carb unreliable in the first place?

 

[WaveDemon]

Yeah, I agree with all that. If I didn't already have duals on my boat, I'd have a single, for sure.

However, money aside: I think that properly adjusted duals will be better throughout the range.

(On 62T cases!)


I have a beef on the reliability issue. Sure, "theoretically" a single is more reliable. But how is a carb unreliable in the first place?

they clog and the rubber parts go bad.

On the lighter side if one carb clogs on a dual you only roast one piston. :biggrin:

 

[Matt_E]

Clogging and bad rubber parts can be circumvented by some maintenance every three years or so. :biggrin:

 

[yamaslut]

dual 44's on a JR. Magoo ported motor.... I love it!!!!!!!!!

 

[WaveDemon]

dual 44's on a JR. Magoo ported motor.... I love it!!!!!!!!!

I'd like to compair our motors nick. Your hull is much smaller than mine though.

 

[yamaslut]

I'd like to compair our motors nick. Your hull is much smaller than mine though.

I'll have to get on your ski in Feb and give it a ride

 

[WaveDemon]

I'll have to get on your ski in Feb and give it a ride

sure.

 

[jetskier79]

In time, I'll have more or less the same setup as Nick. Ill let you you know how it works out .