Fuel Pump Questions v2.0
10-14-2011, 03:44 PM
#26
RE: Fuel Pump Questions v2.0
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10-14-2011, 08:29 PM
#28
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RE: Fuel Pump Questions v2.0
ORIGINAL: Hobbsy
The regulators come with a check valve that pressurizes the tank using muffler pressure on a fourstroke and crankcase pressure on a two stroke and when you see the tank bulge, even one of those stiff walled Sullivans you'll see that there is plenty of pressure to regulate. Since the check valve traps the peak of the pressure pulses in the crankcase or muffler the pressure is considerable.
PS, it would not have been, ''hi jacking'' since it is the same topic.[8D]
The regulators come with a check valve that pressurizes the tank using muffler pressure on a fourstroke and crankcase pressure on a two stroke and when you see the tank bulge, even one of those stiff walled Sullivans you'll see that there is plenty of pressure to regulate. Since the check valve traps the peak of the pressure pulses in the crankcase or muffler the pressure is considerable.
PS, it would not have been, ''hi jacking'' since it is the same topic.[8D]
Just not with a pumping action?
Oh, and Hobbsy, don't you have that backwards? Muffler pressure on a two stroke, and crankcase pressure on a four stroke?
Thanks, for all the replys, everyone,
EJ
10-14-2011, 10:39 PM
#29
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RE: Fuel Pump Questions v2.0
umm im new to the hobby and thinking about buying a nitro r/c car of him but it wont start, dont want to buy it if i cant fix it. what could i try?
10-14-2011, 10:48 PM
#30
RE: Fuel Pump Questions v2.0
ORIGINAL: r/c-beginner
umm im new to the hobby and thinking about buying a nitro r/c car of him but it wont start, dont want to buy it if i cant fix it. what could i try?
umm im new to the hobby and thinking about buying a nitro r/c car of him but it wont start, dont want to buy it if i cant fix it. what could i try?
10-15-2011, 03:28 AM
#31
RE: Fuel Pump Questions v2.0
ORIGINAL: N429EM
OK, so, the regulators do help to increase the flow of fuel from a tank located further back than normal. Right?
Just not with a pumping action?
Oh, and Hobbsy, don't you have that backwards? Muffler pressure on a two stroke, and crankcase pressure on a four stroke?
Thanks, for all the replys, everyone,
EJ
ORIGINAL: Hobbsy
The regulators come with a check valve that pressurizes the tank using muffler pressure on a fourstroke and crankcase pressure on a two stroke and when you see the tank bulge, even one of those stiff walled Sullivans you'll see that there is plenty of pressure to regulate. Since the check valve traps the peak of the pressure pulses in the crankcase or muffler the pressure is considerable.
PS, it would not have been, ''hi jacking'' since it is the same topic.[8D]
The regulators come with a check valve that pressurizes the tank using muffler pressure on a fourstroke and crankcase pressure on a two stroke and when you see the tank bulge, even one of those stiff walled Sullivans you'll see that there is plenty of pressure to regulate. Since the check valve traps the peak of the pressure pulses in the crankcase or muffler the pressure is considerable.
PS, it would not have been, ''hi jacking'' since it is the same topic.[8D]
Just not with a pumping action?
Oh, and Hobbsy, don't you have that backwards? Muffler pressure on a two stroke, and crankcase pressure on a four stroke?
Thanks, for all the replys, everyone,
EJ
10-15-2011, 04:09 AM
#32
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RE: Fuel Pump Questions v2.0
No sir, I have it exactly correct, crankcase pressure from a tap on the backplate of a two stroke and muffler pressure from the stock pressure tap on a fourstroke. The tap on a fourstroke crankcase is strictly for a vent and should not be used for any other purpose. Actually I have a couple of older two stroke engines where the pressure tap is in the left mounting lug, I plugged them and put them in the back plate. There are two things of import to keep in mind when setting up a Cline or IronBay regulator, keep the check valve as close to pressure tap as you can get it and the same goes for the regulator body. The closer the regulator body is to the spraybar the more accurate it can read the demand. Having said that I have used a Cline on a Saito 1.30 twin with two 3" pieces of fuel tube on a Y and it worked perfectly. Don't buy into folks saying that the demand regulators won't work on an airbleed carb, the regulator doesn't know the difference.
10-15-2011, 05:57 AM
#34
RE: Fuel Pump Questions v2.0
Based on my experience with a VP-30 and having it not work real well for my intended purpose, Would you guys say it would be better to use a regulator alone if I needed to have the tank 9" away from the carb's spraybar and have good reliability?
Those regulators are pricey, do they ever really wear out?
Those regulators are pricey, do they ever really wear out?
10-15-2011, 11:36 AM
#35
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RE: Fuel Pump Questions v2.0
Glow fuel is kinda hard on them but they still last two or three years. It was the policy at IronBay to provide at least one free replacement diaphragm.
10-15-2011, 12:39 PM
#36
RE: Fuel Pump Questions v2.0
ORIGINAL: Hobbsy
Glow fuel is kinda hard on them but they still last two or three years. It was the policy at IronBay to provide at least one free replacement diaphragm.
Glow fuel is kinda hard on them but they still last two or three years. It was the policy at IronBay to provide at least one free replacement diaphragm.
On my original question - Will a regulator allow me to put the tank 9-10" away from the spraybar and not need a pump too? I've got an airboat that needs to have the tank below and behind the engine (6" below and 3" behind). The pump I have does work, but the idle and midrange end up being too rich with the pump set where the top rpm doesnt suffer.
10-15-2011, 12:49 PM
#37
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RE: Fuel Pump Questions v2.0
10" would be nothing. Mr. Cline recommended that a piece of fuel tubing be run from the inlet to the outlet to store the Cline regulator, same for the IronBay. Flushing it with Foggin Oil from NAPA would be a great preservative and easy to do.
10-15-2011, 12:54 PM
#38
RE: Fuel Pump Questions v2.0
ORIGINAL: Hobbsy
10'' would be nothing. Mr. Cline recommended that a piece of fuel tubing be run from the inlet to the outlet to store the Cline regulator, same for the IronBay. Flushing it with Foggin Oil from NAPA would be a great preservative and easy to do.
10'' would be nothing. Mr. Cline recommended that a piece of fuel tubing be run from the inlet to the outlet to store the Cline regulator, same for the IronBay. Flushing it with Foggin Oil from NAPA would be a great preservative and easy to do.
Thanks for the info. I appreciate it.
