waxhead
wannabe backflipper
- Location
- gold coast
Single Or Dual Carbs
- Thread starter hangtime
- Start date
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Rick Roy, every year he competed at WF. His motors were build by Todd Lechance at TLR Performance with his 48/44 modified Mikuni SBN, ported 650 manifolds (aftermarket - Westcoast, BCW, etc) With ADA Adapters. Keep in mind these were all sub 800cc motor setups at the time. This setup does work very well.
waxhead
wannabe backflipper
- Location
- gold coast
They also used to compete on 550s
they dont do that anymore ethier because they have found other things to be better
How long ago was it rick roy competed at the wf,s
How many people now that compete at the worlds have single carbs
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
More people run 701-753cc ported motors right now than they do 5+mm stroker Lameys. They single setup does work, and well. But it has its limitations. That was my point. I could throw back on a single carb set up, go compete and do the same tricks, maybe even better with that setup.....
GIL
Power In The Hands Of Few
- Location
- Cullman AL
Will the real supertune please stand up? please stand up?
please forgive me, 7 days and I did what I hoped to do.
I have done what I set out to do and I am sooo proud of myself right now. I feel like maybe, just maybe I am starting to get all this figured out. It did not go the way I thought it would, but the final result is what I was looking for. My ski is easier the cruise on than it ever has been before and will NOT load up at all at any time know matter what conditions I throw at it. It launches furhter/harder off of a set up wake than ever before and pulls harder thru the mid range harder than ever.
I think Crammits ski's or ski's he has had a hand in run better than any other twim carb ski's I have ever ridden and he is running 2 blackjacks.
My goal was to get a single Novi to run as good or better than my duel
Full Specs and I have it better/much better than my Full Specs ever were!
please forgive me, 7 days and I did what I hoped to do.
I have done what I set out to do and I am sooo proud of myself right now. I feel like maybe, just maybe I am starting to get all this figured out. It did not go the way I thought it would, but the final result is what I was looking for. My ski is easier the cruise on than it ever has been before and will NOT load up at all at any time know matter what conditions I throw at it. It launches furhter/harder off of a set up wake than ever before and pulls harder thru the mid range harder than ever.
I think Crammits ski's or ski's he has had a hand in run better than any other twim carb ski's I have ever ridden and he is running 2 blackjacks.
My goal was to get a single Novi to run as good or better than my duel
Full Specs and I have it better/much better than my Full Specs ever were!
waxhead
wannabe backflipper
- Location
- gold coast
im confused by your post gil
are you saying supertune is the only one that knows how to tune carbs
im happy that your single goes better than your twin carb setup
I have never found a correctly setup single to be better than a correctly setup set of twins
something is confusing about your setup anyway as it was unable to pull a pump cone so i dont believe that your twins were as well setup as they could have been
A single is easier to setup as there is only one set of screws to get wrong and sometimes this is why people think they go better than there duals ever did
are you saying supertune is the only one that knows how to tune carbs
im happy that your single goes better than your twin carb setup
I have never found a correctly setup single to be better than a correctly setup set of twins
something is confusing about your setup anyway as it was unable to pull a pump cone so i dont believe that your twins were as well setup as they could have been
A single is easier to setup as there is only one set of screws to get wrong and sometimes this is why people think they go better than there duals ever did
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D-Roc
I forgot!
- Location
- Dirty River Rider
AMEN! maybe some people think single work better because they can't dial in their dual. Kawi in 95 and Yamaha in 96 gave us twin carbs, i will stick with duals. Even if carbs are much better now and peeps can tune them better than back in 96, one is good but two is better. :smokin:
steveyz250fpilot
Banned
- Location
- Huntsville, Alabama
Well, if the more, the merrier, why hasn't someone done a triple into a dual manifold? Or heck, for that matter, 4 carbs into two cylinders???
- Location
- Down stream of Harrisburg, PA
I think you'd hit a point of diminishing returns, where you can have too much fuel/air
D-Roc
I forgot!
- Location
- Dirty River Rider
don't be silly everyone knows that you simply stack carbs ontop of eachother and rejet lean on the bottom two and a tad rich on the top two. :icon16:
steveyz250fpilot
Banned
- Location
- Huntsville, Alabama
Where is that at? Is it at duals? triples? quads?
GIL
Power In The Hands Of Few
- Location
- Cullman AL
waxhead
wannabe backflipper
- Location
- gold coast
The total loss is a huge gain over the msd and lightened flywheel
If you still have the tbm then i would try that again with the total loss
what ignition curve are you running
If you still have the tbm then i would try that again with the total loss
what ignition curve are you running
GIL
Power In The Hands Of Few
- Location
- Cullman AL
I sold the tbm(I would like to try one again now).
I am runnin a 4270 analog right now w/the 5000/3deg chip, 8750 rev chip, and a 3deg/1000 chip.
Crammit is setting me up a digital system now that I bought used.
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waxhead
wannabe backflipper
- Location
- gold coast
what was your static timing do you know
steveyz250fpilot
Banned
- Location
- Huntsville, Alabama
I'm running an enhancer and a stock-unlightened flywheel on mine. However, I do have powervalves on my Lamey. I've never ridden another with them, so I don't really know how big of a difference they make.
GIL
Power In The Hands Of Few
- Location
- Cullman AL
28, which has not been verified by me. Another words, I think it's 28.
waxhead
wannabe backflipper
- Location
- gold coast
They make a massive difference but so does cranking up the timing
I run 32 degrees static on my stroker engine
the more timing the sooner your power band comes in
to a certain point
I run 32 degrees static on my stroker engine
the more timing the sooner your power band comes in
to a certain point
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WFO Speedracer
A lifetime ban is like a lifetime warranty !
- Location
- Alabama
I just don't believe you have the same carb signal strength with a big single carb as you get with dual carbs,I ran into some big problem with carb signal trying to run a 46 on my X2 Rotax motor,believe me I know how to set up a carb by now,but no matter what jets ,needle and seat or popoff you tried it would not run correctly and start correctly,one or the other but not both.I finally put a 40mm Mikuni I series carb on it and a different flame arrestor and it runs great and cranks great now,I am going to try duals on it next,I believe they will be just as responsive and make a LOT more power over the single carb setup.My motor is lacking on bottom end somewhat so it has to get it into the rpm range where it pulls as quickly as possible.
Because it doesn't make a lick of sense.
The point of dual carbs isn't more fuel delivery or more air delivery.
The point is precise signal to a fuel delivery system without confusing it with overlapping vacuum pulses.
You don't put triple-pipes on a triple cylinder to "have more pipe", or to have it breathe easier. It's done to get accurate pulses that don't overlap.
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