What is the best Rec Freestyle Carb Set up?

[SUPERTUNE]

Yes, Ed's carbs work very well! These are his new ones too!
We won the World Finals with a set of Full Spec's on our engine.

 

[masterblaster]

I had the bj jetted in perfect,Im not saying it sucked just that it didnt feel much better than a stock 46 but I had it dialed with god low end responce and good rpms up top.granted im trying these as single setups. I moved the same jets,needle,seat,popoff over into the riva,and tried jeting it a tad higher and lower,and still could not get past the running out of fuel at top end,But some of the cali boyz including serlin had the same issue with this carb. But rest assured it hit MUCH harder than the blackjack untill it ran out of fuel.
I have not had time to take the FS carbs to the water yet,but im runnin them back to back against the riva,so i will know soon. I was basing my judgment on full specs from riding another junkie ski,that changed nothing but the FS setup including their boyseen intake,it hit so freakin hard it was almost difficult to surf ride it.like nothing else ive seen from any other carb setup

 

[Matt_E]

I moved the same jets,needle,seat,popoff over into the riva,and tried jeting it a tad higher and lower,

You can't be serious.
You're taking jetting from one make of carb, transfer it to another, bigger, and completely different carb, and you expect that to work?
Or did I misunderstand what you did here?

 

[Kennay]

At this point I have to discredit anything else he has to say. It's obvious he doesn't know what is going on.

 

[masterblaster]

Listen captain know it all,I called Art at JW and Pete at riva,the jetting suggestions for both were almost identical,same needle and seat same pop off same main,slightly diff pilot

 

[Matt_E]

Out of curiosity, what were the jetting numbers?

(I haven't ran a single BJ, but I have used a single 48 Powerbomb)

 

[masterblaster]

2.5 needle and seat,80 gram spring,posibly 65gram for the riva,155 main 135 pilot.
I took both carbs up progressively to a 180 main 150 pilot,with 12psi popoff up to 19psi

 

[Matt_E]

I hope you get it figured out. Tuning instead of riding isn't much fun.

 

[masterblaster]

thankfully Its just a backup ski for now,until the motor setup proves itself reliable it will remain in that state.And Like I said I had the blackjack dialed,it seemed to do better jetted up higher than recommended for this motor setup.It felt good for a surf boat,very linear,but just not hard hitting.felt like a ported 701 instead of a 5 mill stroker.
I will know more once I get a chance to run these full specs,they are jetted up very high for duals,but came off a VERY well running 6 mil stroker racing setup. The pulsing fuel I spoted on the riva may have been fuel pump related.the fs setup has a remote fuel pump as well.we shall see how that works out with this single pulse line setup.

 

[Kennay]

I'd wager you would do much better using duals than any single for that motor. I still don't get the single carb fad for doing anything aside from riding surf where it would tame the engine down and make it smoother.

 

[masterblaster]

Im not married to any single carb setup,I just had them avail to me without having to own them all to try. Its no secrete duals make more power,but for me enough is enough somewhere.and being a surf rider having some degree of linear hit is important,I dont want a 5 mil stroker hitting like a truck and wearing me out in 30 min. Im looking for that perfect mix of linear power and pipe hit.Just want to know first hand what they feel like compared to duals.I put very little stock in consensus on setups spouted around on these sites,as it is largely one persons opinion mouthed off by the masses who in most cases never rode it at all. If I say something its going to be based on my personal exp or someones elses ski in our ride group that I got to personally ride.

 

[masterblaster]

this is what another rider sent me in a pm about this riva carb,so it appears it must not be all that easy to get this powerbomb to tune,I know of 2 others that had issues with it but were able to finally get it right.

hey
"I gave up on that thing. i had 3 seperate motor builders charge me way too much money to not make it work. I'm runnin a single 46 now and i got jetworks doin me up a set of taper bored 38's. well see what happens "

 

[Matt_E]

I have used a single Riva 48 Powerbomb on three different motors with great success. All were ported 760 motors with B-Pipes and some case porting. It hit about the same as a single 48 Full Spectrum that I tried on two of those three motors.
The jetting was about spot-on the way it came to me from Blowsion.
I think I ended up with something like 130 pilot/150 main (in the ballpark) and a 70 pilot in the return line. You are restricting the return, right?

 

[Big Kahuna]

I'd wager you would do much better using duals than any single for that motor. I still don't get the single carb fad for doing anything aside from riding surf where it would tame the engine down and make it smoother.

I guess it was a fluke that Rick Roy dominated for so many years. Guess his engine builder did not know squat.

 

[GIL]

I guess it was a fluke that Rick Roy dominated for so many years. Guess his engine builder did not know squat.

Are you saying RR ran a single? Yet give me crap for runnin a single? LOL
How are the girlz? Hey Bevis-the gas cap thingy goes ON the fuel tank, not resting on your exhaust hose! LMAO

 

[steveyz250fpilot]

I'd wager you would do much better using duals than any single for that motor. I still don't get the single carb fad for doing anything aside from riding surf where it would tame the engine down and make it smoother.

A single carb tames an engine down and makes it smoother huh?

 

[GIL]

A single carb tames an engine down and makes it smoother huh?

apparently so-I guess I need to quit smokin crack w/I ride. (my ski or yours) LOL

 

[Big Kahuna]

Are you saying RR ran a single? Yet give me crap for runnin a single? LOL
How are the girlz? Hey Bevis-the gas cap thingy goes ON the fuel tank, not resting on your exhaust hose! LMAO

Uh, yup, it was even a 44mm SBN.

I actually ran one of his old manifolds and adaptors for a while with the same carb setup from TLR.

My Take from personal experience. On a 701 ported setup, it works really well. Throttle response is really good. But, there are a few characteristics that some may like or not. The power is like a light switch, there is no in between. Also, Temperatures, humidity makes a huge difference in tuning, constant attention was always needed. Also, do not go WOT for long. It will stick a piston. Just a matter of time. Another thing, half throttle your are at MAX RPM's. Cruising the lake on this setup absolutely sucks. Keep in mind this is with the TLR Mod carb. Not a stock 44. Totally different animal.

 

[Kennay]

A single carb tames an engine down and makes it smoother huh?

I really stayed on the old ignore list long, eh?

 

[Kennay]

And I will bow out of the argument, I'd argue, but in all reality I don't know enough to really back up my opinion.

My motor man says use duals, it makes more power... I've never heard or seen it written where another builder disagreed. Single for simplicity, duals for most power.