ASP 1.60 twin flooding, fuel regulator?
10-07-2013, 08:02 PM
#1
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ASP 1.60 twin flooding, fuel regulator?
I have an ASP 1.60 twin four stroke glow engine on myHangar 9 1/4 scale Super Cub. The tank is much higher than the carb, which is on the bottom of the block. Flooding is an issue. With the high speed needle set right, and a good reliable idle, it tends to load up rich and transition becomes sluggish, or idle gets too wet even with onboard glow on and it will stall out slowly on quick transition. Is there any easy way to regulate this fuel issue? I don't think a Perry Pump will help- I need some kind of regulator. Help me, please! 
Lowering the tank is not possible.
Lowering the tank is not possible.
10-08-2013, 06:22 AM
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With carb much lower than the tank if you disconnect the fuel line from the engine won't it gravity drain the tank? That would be the issue worse when the engine is running because of head pressure
10-08-2013, 07:01 AM
#4
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There is no head pressure. The twin uses the carb venturi to suck the fuel to the engine. There is no pressure line to the tank. With the throttle closed, fuel flow is blocked also, I believe. I've never had fuel drain out the carb with the throttle closed and engine not running.
10-09-2013, 06:09 PM
#7
Check a couple of things that made my 160 run less than good.
The O ring where the carb slips onto the manifold was loose letting air in.
The needle valve/seat was a very poor fit, the needle would rock up & down
upsetting the mixture, an OS unit fixed that. - John.
The O ring where the carb slips onto the manifold was loose letting air in.
The needle valve/seat was a very poor fit, the needle would rock up & down
upsetting the mixture, an OS unit fixed that. - John.
10-09-2013, 08:03 PM
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I also had an air leak at that same o-ring. Needle valve seems great, though, but now I'll keep an eye on it. Thanks!
10-10-2013, 08:26 AM
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Hi!
You will never have the engine run good with a tank placed that high! The tank must be placed according to the "tank mounting rule". If not the fuel hight will make havoc on the setting.
A fuel regulator will fix it but I have never used such a thing. I would lower the tank instead!
You will never have the engine run good with a tank placed that high! The tank must be placed according to the "tank mounting rule". If not the fuel hight will make havoc on the setting.
A fuel regulator will fix it but I have never used such a thing. I would lower the tank instead!
10-10-2013, 11:52 AM
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I have it tuned and running extremely well now that the low speed needle is set better. To mount the tank below the spray bar would require mounting the tank mostly outside of the fuselage.
10-10-2013, 12:27 PM
#11
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Hi!
You will never have the engine run good with a tank placed that high! The tank must be placed according to the "tank mounting rule". If not the fuel hight will make havoc on the setting.
A fuel regulator will fix it but I have never used such a thing. I would lower the tank instead!
You will never have the engine run good with a tank placed that high! The tank must be placed according to the "tank mounting rule". If not the fuel hight will make havoc on the setting.
A fuel regulator will fix it but I have never used such a thing. I would lower the tank instead!
10-10-2013, 04:04 PM
#12
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Yes, and with the current high- and low speed needle settings there is almost no syphoning if fuel when the throttle is closed and the engine is not running.
10-11-2013, 10:27 AM
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Hi!
You will never have the engine run good with a tank placed that high! The tank must be placed according to the "tank mounting rule". If not the fuel hight will make havoc on the setting.
A fuel regulator will fix it but I have never used such a thing. I would lower the tank instead!
You will never have the engine run good with a tank placed that high! The tank must be placed according to the "tank mounting rule". If not the fuel hight will make havoc on the setting.
A fuel regulator will fix it but I have never used such a thing. I would lower the tank instead!
It's running so well now. I'll post a video soon, next few days...
