2 into 1

[Snopczynski]

Just because yours didnt make power doesnt mean someone elses combo wont. Dyno sheets don't prove individual parts. I went from the 2 26mm carbs what have been gone through dozens of times. I then installed 33mm carbs and it ran like crap. So I decided on the 2 into 1 with a 38mm and it runs like it has never ran before.

 

No matter how much you swear it does or doesn't it is all opinions!!!!

 

 

Now you say "yours" but I clearly listed my bike and two others that have had good results converting from the single to twin carbs. We also had a 7mm 460cc resleeved cheetah motor on the dyno (one of those bikes). Setup 1 was a 38mm single lectron with pt mids (base jetted run 87hp). Swapped the pt mids out for pro circuits and got an additional 5 hp and a broader torque curve with the pc's (92 hp run). Then we swapped the single 38mm lectron to a set of mikuni 28mm tm flatslides bored to 30mm and los .5hp at 6,500 rpm or so and gained 2 more hp through the midrange and topend (94hp run). The gain from the single setup is minimal and unoticeable at best compared to a good set of duals. The redline on this motor was around only 8,700 rpm as well. The other thing you have to watch is the torque curve. Midrange wise the torque curve was better on the duals than the single because of where final hp numbers end up. A .5 hp loss at 6,500 rpm is barely just wicking onto the throttle, and the gain to be had by a single then falls under the twin carb curve very soon after because of the broad torque curve that proper intake velocity helps to build.

 

I also saw a comment on here a few days ago that the single carb makes it easier to jet for twin cylinders because sometimes one cylinder may demand more fuel than the other. This is false. If a cylinder demands more fuel on one side than the other, than your either going to end up with a lean cylinder or rich cylinder on a single carb. You will never have both cylinders recieving the perfect amount of fuel if one is demanding more fuel than the other.

 

So no, unlike some on here I do not make unjustified or un-researched claims or product feedback posts based on what I am considered to be biased to. I use to be a 2 into 1 advocate, obviously now I am not. Thats because I did the testing and research to justify the claims I have made on the setup. Its a waste of money and time to run a single carb setup fore those thinking about the switch. For those with singles, its up to you if its worth converting back to a proper set of duals to gain 2-5 mid-top hp, and not notice a low end power loss.

 

For those who got a single carb for an easier thumb throttle, grow a set and get a twist throttle. :biggrin: JK!