Another dual 44's tuning question

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
I would guess it's a combination of motor setup, carbs, total weight, and riding style.
 

Mile9c1

X-H2O.com
Location
Grand Rapids, MI
You're probably way too rich if you go through gas that fast.

On adjusting the idle... turn them in 1/8 turn increments until you know where it idles the best, then adjust them more precisely. It's best to ride it inbetween tunings, it takes the carbs a bit to adjust.
 
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Freestyleriverrat

Guest
I took mine down to the river today. It ran OK, but I did not get over 1/4 throttle, maybe hit 1/2 on short blips. Nice and responsive but the cylinder was running hot. Plugs look like they are rich b/c of the carbon deposits but since it was not really run hard that is not a very reliable indicator. Seemed to run best with 1.5 out on the low and 1 out on the high. I need to think it over again before putting it back in the water, I did not like how hot it was running......sounds to dangerouly lean to me. It also does not want to start w/o a couple blips of the throttle.



Current Set up: 110M, 117.5 P and 2.0 w/ 95g spring

Magoo ported 701
Enhancer
light flywheel
dual OEM 44's
v-force gen 1's
ported cases
ADA head making 190 psi
b-pipe w/ mod chamber
flow control valve
 

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Freestyleriverrat

Guest
I think you are right, I will get an assortment of jets for tuning. I think I am close, maybe even bumping it up to a 112.5 or 115 main jet will help. That 110 just sounds a little small for the motor set up.
 

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
That's exactly the situation I ran into. I ran a 110 main (115 pilot) and it just wouldn't go past 1/2 throttle.
I swapped in a 125 main - perfect.
 

waxhead

wannabe backflipper
Location
gold coast
if you cant get over 1/4 throttle then you are in the low speed side of your carb
reduce your pop off
the low speed jet is not the very bottom
its your midrange
in fact i dont know why they dont call it the everything jet
becaus eit effects so much of your jetting
when you start to get down and towards the back on your ski thats your high speed jet

your problem to me sounds like to small a polit
or to high a pop off pressure making the low speed come on to late
 
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Freestyleriverrat

Guest
I am getting ready to order some jets. What do you think get everything from 115-125 for the main and 115-125 for the pilot as well? That should cover me range wise. I definatly think that main jet is to low, not to sure on the pilot yet. I just hate tuning on a new motor, in this situtation I would rather be fat and let the motor break in over being lean when the motor needs lubrication and air the most. It is just tricky b/c it would definatly hit.
 
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Freestyleriverrat

Guest
Matt_E said:
That's exactly the situation I ran into. I ran a 110 main (115 pilot) and it just wouldn't go past 1/2 throttle.
I swapped in a 125 main - perfect.

What are the specs on that motor?
 

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
Yes, I would order those jets. That'll give you plenty to choose from.
My cylinder porting is somewhat similar to what Paul does, so the jetting is at least close.
 

crammit442

makin' legs
Location
here
Freestyleriverrat said:
I am getting ready to order some jets. What do you think get everything from 115-125 for the main and 115-125 for the pilot as well? That should cover me range wise. I definatly think that main jet is to low, not to sure on the pilot yet. I just hate tuning on a new motor, in this situtation I would rather be fat and let the motor break in over being lean when the motor needs lubrication and air the most. It is just tricky b/c it would definatly hit.

Whoever built your motor and recommended the rest of your setup should be able to tell you this. Whoever did your port work and figured out the rest of your package should be able to get you within a jet size. He really should be able to get you within screw range. I'm sure you paid good money for expertise and that's what you should be getting. You'll never get it tuned over the internet with help from people(many of whom are here asking the same questions about their own motors) who've never even seen your motor. If you can't get the info you need from your builder, the bottom line is you need to give the carbs what they tell you they need by patiently tuning through the various circuits. Good luck!:smile:

Charles
 

Matt_E

steals hub caps from cars
Site Supporter
Location
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If you can't get the info you need from your builder, the bottom line is you need to give the carbs what they tell you they need by patiently tuning through the various circuits.

Hence he needs an assortment of jets. ;)
 

crammit442

makin' legs
Location
here
Matt_E said:
Hence he needs an assortment of jets. ;)

Much less so if he has the correct jetting specs from the start. When I get my stuff back from Jetworks, even on wierd stroker stuff I'm usually within a jet size or two. If it's a combination he's built many times, it's normally within screw range. If I have a problem, I call Art and since he knows EXACTLY what my setup is in every detail he can almost always get me squared away quickly. That's why he's the man!!!:biggthumpup:

Charles
 

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
crammit442 said:
Much less so if he has the correct jetting specs from the start. When I get my stuff back from Jetworks, even on wierd stroker stuff I'm usually within a jet size or two. If it's a combination he's built many times, it's normally within screw range. If I have a problem, I call Art and since he knows EXACTLY what my setup is in every detail he can almost always get me squared away quickly. That's why he's the man!!!:biggthumpup:

Charles


Yep. I agree Charles.However, it seems his recommended jetting isn't quite where it needs to be.
 
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Freestyleriverrat

Guest
Matt_E said:
Yep. I agree Charles.However, it seems his recommended jetting isn't quite where it needs to be.

Charles has some good points, however, I rode the ski and am not guestimating. Other people experiences are nice to back up my inital feeling of the ski is to lean on the main jet. I made adjustments at the river but, from my experience, the leanness is caused by a jetting problem and not an adjustment issue. Since I am still kind of putting around on the new motor I would rather jet it rich and work my way down than score the cylinders from an excessive lean condition.
 
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