650/X-2 Dual 44mm SBN
- Thread starter Snivilous
- Start date
- Location
- Loveland, Colorado
I have been doing alot of talking to full spectrum, novi, jet works Because of my x2 build (you will see it out at boyd next season hopefully!). I was told dual 40's are about as much as you want on a 650 no matter how rediculous. I don't know what you have done to yours but dual 38's would be a great set up from what I hear. To tell you the truth I have only ran a single 44 sbn so I'm guessing what the guys from the major companies told me is true. All of them told me the same thing about the dual 40's and I also asked them about dual 44 sence I had a set up laying around and they told me that was just to much. Except fullspectrum told me a single 49 would out preform them, but I think he was just trying to sell me his floor demo. This is just what I heard but I guess you cant hirt anything giving them a try.
Ok good to know. I want to stick with the single 44 but was curious. I also plan on attempting a nitrous oxide injection system (because it'd be awesome, because it'd help a lot if it works in my attempt to a backflip a 650sx, and because you can brag about it), and the single 44 works better since then you don't need to worry about messed proportions into each cylinder or having twice the fuel/N2O lines running around. Aside from increased fuel flow, do you think dual 38s versus single 44 has a huge performance difference?
- Location
- Loveland, Colorado
Honestly I have not tryed dual carbs on a 650. My original plan this fall I was going to stick with single44 on the 650. I was going to have it modified by jet works to make it a black jack. I tryed one on my ski for a day and it was alot more responsive. Gained a tiny bit on the top end too. They bore your carb to a 46 then change it to a annular discharge. I would say it would be a good add on to your ski!
- Location
- lake house
I saw this on the other forum if ur planning to run dual 44
http://www.pwctoday.com/f149/jetsport-dual-44-intake-manifold-650-w-linkage-setup-351967.html
http://www.pwctoday.com/f149/jetsport-dual-44-intake-manifold-650-w-linkage-setup-351967.html
What do you mean by tuned for the engine?
And I want torque and bottom end punch, I don't care so much for the high rpms.
Vumad
Super Hero, with a cape!
- Location
- St. Pete, FL
I don't know for sure, but my guess is that the dual 44s will have improved top end with minimal improvement on the bottom, with greatly increased fuel consumption. I'd run the single 44 and run the gas tank with 1-1.5 less ga of fuel. I would assume the weight savings on fuel would equal the bottom end gains of the dual set up.
My vote is run it both ways and see which you like better. You already have the carbs.
My vote is run it both ways and see which you like better. You already have the carbs.
That's what I was thinking.
All large carbs must be set overly rich at part throttle in order to give best response. This is where the excessive fuel burn occurs on a standup. Every time I cleaned up part throttle, fuel consumption decreased and throttle response became lazy. If you are still talking about carbs Im sure many other performance aspects have been missed.
