waxhead
wannabe backflipper
- Location
- gold coast
Why only 150psi, ??
Freestyle ET1107cc Tuning Thread
- Thread starter SmittySX
- Start date
I'm looking for domes to increase compression. No luck yet.
- Location
- Glenmoore pa
I’m amazed you got 150 though. His pump domes make like 180. Has the motor been apart? Maybe it’s got a really thick base gasket? Maybe check your squish.
- Location
- Charlotte NC
7k elevation... that is the reason for 150 psi.
At 7k elevation you loose close to 30 psi compression.
No. Should I? If so what size should I drill them to.
waxhead
wannabe backflipper
- Location
- gold coast
Do you always ride there. you can go for smaller domes
I can't find smaller domes for ET. I always ride here. I tune my ski for elevation.
- Location
- Glenmoore pa
Gonna be tough considering Art passed away. Maybe contact Mark Erickson. He did a bunch of ET motors and MAYBE could make some domes?
Thanks @Jcary85 I'll try and track him down.
Further updates:
The ski won't rev out of water. It almost sounds like it's hitting a rev limiter around 4k rpm? I've checked the compression, fuel delivery, and reeds. I'm curious if something electrical is going on.
Here's a pic of the domes and pistons.
I've tested spark with the zeeltronic test button and when cranking with the plugs grounded to the head. All checks out. Is it normal for such a difference between the front a rear cylinders? The coil is OEM and probably 10 years old. Not sure if those go bad but still work below 4k rpm?
I've gone through every suggested jet and pop off combo and nothing changes this issue.
Edit: Wax sent me a new curve and I'll test that version out tomorrow.
Further updates:
The ski won't rev out of water. It almost sounds like it's hitting a rev limiter around 4k rpm? I've checked the compression, fuel delivery, and reeds. I'm curious if something electrical is going on.
Here's a pic of the domes and pistons.
I've tested spark with the zeeltronic test button and when cranking with the plugs grounded to the head. All checks out. Is it normal for such a difference between the front a rear cylinders? The coil is OEM and probably 10 years old. Not sure if those go bad but still work below 4k rpm?
I've gone through every suggested jet and pop off combo and nothing changes this issue.
Edit: Wax sent me a new curve and I'll test that version out tomorrow.
- Location
- Glenmoore pa
If it won’t rev out of the water it’s likely electrical. If you have a stock 760 cdi, slam that in and test real quick. Doesn’t hurt to grab another coil and try that. You can ohm test them to see if the windings are shorted. I’d make sure the flywheel key didn’t sheer and flywheel moved or something. Is your static angle correct (56) in zeel config? Could be failing pickup also.
I’d also just visually check you have fuel coming out of both carbs when u rev it up. Also, hover your hand over each carb while running and feel for pressure coming out of the carbs (bad reeds). Might be worth just looking at the reeds.
Inspected reeds, they are mint. Fuel dribbles out of both bomb sites in the carbs. Static angle is correct.
I'll order a new coil just to be safe.
I have an old cdi to test, but I'm non sure if it will work. I've ripped all the extra stuff out if the ebox. Only thing I'm running in there are the parts needed for total loss.
I've heard extra grounds from ebox to motor are sometimes needed. Is this the case for zeel as well?
Thanks for the tips @Jcary85 , I'll report back.
I'll order a new coil just to be safe.
I have an old cdi to test, but I'm non sure if it will work. I've ripped all the extra stuff out if the ebox. Only thing I'm running in there are the parts needed for total loss.
I've heard extra grounds from ebox to motor are sometimes needed. Is this the case for zeel as well?
Thanks for the tips @Jcary85 , I'll report back.
- Location
- Glenmoore pa
An extra ground can’t hurt but all you really need is the one that goes to the stator.
waxhead
wannabe backflipper
- Location
- gold coast
Damn dude. what jets are in that. look at the piston wash on it. Its like they are new but one piston has some build up on it. Its not a blown o-ring as it would then rev our of the water and not in it.
115 main 130 pilot at 17psi. Leaner than what Art recommended. :/
- Location
- Glenmoore pa
Have u dialed in the low screws until you hit the off idle lean bog? You basically need to do that then go out a 1/4 turn. Then see where the screws are at. If you are way in, go down on low speed jet. If you are way out, go up.
Fantastic advice. Thanks @Jcary85, your help is much appreciated.
Christian_83
Xscream
- Location
- Denmark
Hi dude, i dont wanna stress you out - but are you running a ET crank?
Could you please verify that your crank is true 180 degree phase, pics might be deciving - but it looks like both pistons has open exhaust port.
I bought a brand new ET engien from Art (RIP) for a freind, that that a ET crank in it, which twisted out of phase with initial start up - ski had not been in water yet, so no it could not have hydro locked.