Mile9c1
X-H2O.com
- Location
- Grand Rapids, MI
I don't see why flat tops would affect the basic function of the water screws. But every setup is different; too many variables to copy someone else's jetting.
Magoos 85mm + Single Carb. Anyone?
- Thread starter Yamah0
- Start date
freestylegeek said:
Thanx geek:wink:
freestylegeek said:
Hmm... garden hose!!
Iv heard a mechanic here in my speck of the woods talk about that, but his engrish was velly hald to undelstan.... so i was just nodding my head yes yes, and what i gathered from him blabbering was how he used to like spraying his neighbors dog with a garden hose, or summin like dat:banghead:
Can u please explain the procedure, or is there a site or thread where i can read/learn about it?
superramjet said:
How do i find that out?
The return is the top outlet closer to the filter... right?
Anyways what does this have to do with the tuning? Can u plz explain?
In three hours ill be back at my ski and swap out the low jet and needle to 2.3, hopefully all goes well.... ill let u guys know:woot:
Thanx
Zane...
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freestylegeek
waiting...
- Location
- Grand Rapids, MI
Yamah0 said:
Well, what I've always done is hooked up a garden hose to the bottom barb fitting on the headpipe. If you have an old end of a hose, you can just cut it and clamp it on. I also hook up the waterline to the top fitting as well as the bypass fitting (just to insure I have something close to my opperating restriction). I turn the water on to a point wher e my bypass fitting is squirting a distance that's about the same as when the engine is reving up. Then I'll start cracking open the bottom screw untill it's right on the edge of a dribble and a 1" tall 'fountain'. You can also tell if your other screws are completely closed or not because the'll be letting out water if they aren't.
You can also turn your other screws and see what kind of effect it has on the injection stream. Some pipes have 4-6 turns of adjustment, and others only have about 2 turns.
It's a good couple of hours of wholesome Saturday evening fun! :Banane01:
dirtriderx99
veins pulse with gas
- Location
- San Jose & San Luis Obispo, CA
Could you also adjust the pipe screws with the jetski running on the trailer in the water?
Mile9c1
X-H2O.com
- Location
- Grand Rapids, MI
You can adjust the pipe screws anytime you want, but you won't know how much water is coming out of them until you use the method that geek described above.
It's not an exact science, but you'll be able to see the difference in flow between say 1/4 turn out, and 1/2 turn out.
It's not an exact science, but you'll be able to see the difference in flow between say 1/4 turn out, and 1/2 turn out.
Well i did what i had to do but no luck.
Question... Does compression affect the jetting?
My compression now is 225 but today im gonna swap out the domes and that should bring my comp down to around 185psi..
So do u think the jetting setup (135, 125, 2.3, 115) didnt work right cuz of the higher compression?
Does the engine run leaner with higher compression?
Also...If on my flat top setup the 28cc domes gave me 150psi and the 24cc gave me 225.. Is theres a way to calculate what exact size domes i need to get around 185 to 190psi ?
What compression are you guys running on ur flat top setup ?
Sorry for the gazillion questions.
I hate this:frown:
Zane...
Question... Does compression affect the jetting?
My compression now is 225 but today im gonna swap out the domes and that should bring my comp down to around 185psi..
So do u think the jetting setup (135, 125, 2.3, 115) didnt work right cuz of the higher compression?
Does the engine run leaner with higher compression?
Also...If on my flat top setup the 28cc domes gave me 150psi and the 24cc gave me 225.. Is theres a way to calculate what exact size domes i need to get around 185 to 190psi ?
What compression are you guys running on ur flat top setup ?
Sorry for the gazillion questions.
I hate this:frown:
Zane...
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Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
well, I would guess that 26cc would be about 187.5 lbs compression +/-
Yamah0 said:
Zane, I think you need to go all the way back to square one & start over.
There are way too many idems that simply don't add up.
here is my case in point......... Domes.... 28cc = 150# & 24cc = 225#
Thats a 75# differance in 4cc.......... in comparison, on the normal ada chart there should only be a 35# differance ?
when the motor was assmbled, did you do a leak down test?
Did you do a squish test?
Exactly where is your timing & did you set it with a degree wheel.
rember, you are now using a flat-top & the piston timing Dimension is a little differant, you will need to compensate at the stator
The water injection/ head pipe has been handled pretty well by the folks here, Thank you!!
Your jetting numbers are all over the place.
I'm waiting to get with Ed on your Full spec jetting. I will have that for you shortly.
Hang tough, I'll get you thru this & going in no time
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Mile9c1
X-H2O.com
- Location
- Grand Rapids, MI
Yamah0 said:
It doesn't in theory, because it's the same volume of air. But with higher compression your engine can tolerate richer jetting specs (more compression = runs hotter = burns more completely).
You should always aim for correct jetting though.
freestylegeek
waiting...
- Location
- Grand Rapids, MI
Yamah0 said:
I'm running an ADA head with 24cc domes and my compression is 185psi.
I am, however; running a ported Lamey cylinder...
When Paul says he'll get you through this, he will!
Trust in the master! :biggrin:
- Location
- atlanta ga
freestylegeek said:
must be nice to have that lamey.
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
What? freestylegeek has a lamey? I couldn't tell. :wink:2nd nature said:
freestylegeek
waiting...
- Location
- Grand Rapids, MI
2nd nature said:
Took me a while to save for it, but it's worth EVERY penny!
I'm officially addicted now, and I'll never be able to go back to stock. :woot:
Jr. Magoo's said:
Well.. no leak down test was done cuz i think non of the mechanics i know here do it or know about it. :banghead:
Squish test? Hell.. If i tell a mechanic here to do a squish test he'll prolly think im askin to date his daughter or talking bout some vegetable.:chairshot:
My timing is set at 0 but was not done with a degree wheel... same scenario as above.
I spoke with Ed yesterday and got all the correct jetting and tips for my FS.. so im gonna try it out today and recheck my compression with the 28cc i put back in. So we'll see.
Paul... what if i put the 24cc back in (225psi) and run two base gaskets?
Thanx for the support and all the help fellaz.
Zane
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Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Zane, something is wrong for you to be getting 75 lbs compression jump from 4cc dome size difference........... Paul mentioned this also............ not sure what is going on there buddy...........
orange flattop freestyler
The Carlsberg ski
- Location
- Essex UK
Zane if you run 2 base gaskets your port timing will change, you will lose bottom end.
Get a propper set of domes machined :biggrin:
Get a propper set of domes machined :biggrin:
Don 79 TA
Still Fat....
- Location
- Madision/Huntsville AL
Yamah0 said:
are you also using a good quality compression gauge? is the battery at a healthy cranking state?
Snap On is the only one i trust
i learned that the hard way
that is a huge difference for a two sized dome change
make usre you also don't pinch an oring too
done that as well
guiness92
▓▓▒▒▒▓▓▓▒▒▒▒▓▓▓▓▓▓
- Location
- South Jersey Shore
I wouldnt double the base gasket, that seems it would be a good way to cause an air leak. Maybe just get a thicker one.
