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I m running 60mm Flowed Crank and 210 Mhr and full other stuff. I am planning to increase my Carb 30 mm to 35mm and time to add Fuel Pump but ı have no idea about Lt/h?
DELL`ORTO 55lt/h ıs ıt okey?
Or MIKUNI 20 liters/h?
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Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
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I use one like Ssteam177. I don't have a return line, I have a link/bypass between the in and out with a restrictor in the line. The restrictor I'm using is the little screw-on bit on the end of a spark plug... any smaller and it seems to flood too easily.
All of these pumps supply more than you need, which is why you have to deal with excess fuel with a return or bypass. |
Ossessionato
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
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I am thinking on putting a pump too, cause I am experiencing starvation when in reserve and a bit lower. I was thinking to use the new plastic Mikuni pump that Piaggio uses on all newer models. I have seen it on the 50cc Runner RST, being used directly from the tank to the carb, so I am assuming there's no flooding issues. The only question I have is to where I put the vacuum tube. On the Runner the vacuum is between the reed valve and crank. First of all, I don't want to drill my cases. Will it work directly on the carb or the manifold?? I am still using the "disc valve" system. Any experiences??
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Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
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I feed the carb from a tee at the top of the return line. that way:
1. you get gravity feed with a constant height from about the top of the tank 2. if you leave the fuel on it will only drain what's in the line, no risk of dumping the whole tank or flooding. on the down side it takes 5 kicks or so to prime it if it's not run in a while. |
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SaFiS wrote: I am thinking on putting a pump too, cause I am experiencing starvation when in reserve and a bit lower. I was thinking to use the new plastic Mikuni pump that Piaggio uses on all newer models. I have seen it on the 50cc Runner RST, being used directly from the tank to the carb, so I am assuming there's no flooding issues. The only question I have is to where I put the vacuum tube. On the Runner the vacuum is between the reed valve and crank. First of all, I don't want to drill my cases. Will it work directly on the carb or the manifold?? I am still using the "disc valve" system. Any experiences?? |
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I'm running an electric fuel pump on my '80 P200 w/Polini 208 and Polini 28mm PWK. It's been a great setup and runs strong even to the point of the tank being almost completely empty.
It's a Facet Posi Flo 60304 made for carbed ATV's. It only pushes 2 psi max so it doesn't overpower the PWK's float. It's wired via a relay and switch and I have a digital voltmeter to keep an eye on the (very small) 4ah battery. I was originally worried that the charging system wouldn't keep up with the fuel pump's draw but I've been running this setup for six months + now and many many miles and I've never needed to charge the battery. The voltmeter reads 14+ volts at mid to high RPM's and the system has been rock solid. |
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2007 Stella 225
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Resurrecting an old thread, anybody try one of these?
niz76 wrote: I'm running an electric fuel pump on my '80 P200 w/Polini 208 and Polini 28mm PWK. It's been a great setup and runs strong even to the point of the tank being almost completely empty. It's a Facet Posi Flo 60304 made for carbed ATV's. It only pushes 2 psi max so it doesn't overpower the PWK's float. It's wired via a relay and switch and I have a digital voltmeter to keep an eye on the (very small) 4ah battery. I was originally worried that the charging system wouldn't keep up with the fuel pump's draw but I've been running this setup for six months + now and many many miles and I've never needed to charge the battery. The voltmeter reads 14+ volts at mid to high RPM's and the system has been rock solid. |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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This thread kind've died off, but I installed a self-regulating Dellorto fuel pump on my FrankenSprint a few months ago now with no external regulator or return flow valve or anything and it's been rock solid. This is a motor that's currently putting out about 22 HP with a 34mm PWK, and it's fine from idle straight through to WOT.
If you haven't committed to anything yet, I strongly recommend it. |
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
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chandlerman wrote: This thread kind've died off, but I installed a self-regulating Dellorto fuel pump on my FrankenSprint a few months ago now with no external regulator or return flow valve or anything and it's been rock solid. This is a motor that's currently putting out about 22 HP with a 34mm PWK, and it's fine from idle straight through to WOT. If you haven't committed to anything yet, I strongly recommend it. |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
Joined: UTC
Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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Ginch wrote: chandlerman wrote: This thread kind've died off, but I installed a self-regulating Dellorto fuel pump on my FrankenSprint a few months ago now with no external regulator or return flow valve or anything and it's been rock solid. This is a motor that's currently putting out about 22 HP with a 34mm PWK, and it's fine from idle straight through to WOT. If you haven't committed to anything yet, I strongly recommend it. I was a little specious when I first ordered it, but am now completely sold on it. |
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8595 Location: Victoria, Australia |
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Ossessionato
2007 Stella 225
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Posts: 3547 Location: Rochester, Minnesota |
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chandlerman wrote: This thread kind've died off, but I installed a self-regulating Dellorto fuel pump on my FrankenSprint a few months ago now with no external regulator or return flow valve or anything and it's been rock solid. This is a motor that's currently putting out about 22 HP with a 34mm PWK, and it's fine from idle straight through to WOT. If you haven't committed to anything yet, I strongly recommend it. |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
Joined: UTC
Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Christopher_55934 wrote: That looks interesting, they also appear to have a bypass. https://www.accelerationkarting.com/RighettiFuelReservoir |
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2007 Stella 225
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chandlerman wrote: Christopher_55934 wrote: That looks interesting, they also appear to have a bypass. https://www.accelerationkarting.com/RighettiFuelReservoir |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
Joined: UTC
Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Just drill the cases and be done. You can tap it for the nipple and close it off with a bolt if you ever want to go back.
After all, there's no such thing as a Concourse Restoration Stella
Positive
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2007 Stella 225
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chandlerman wrote: Just drill the cases and be done. You can tap it for the nipple and close it off with a bolt if you ever want to go back. After all, there's no such thing as a Concourse Restoration Stella |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
Joined: UTC
Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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Oh, yeah! I forgot you got the P200 motor for it.
I'd probably do it anyway, just vacuum as I drilled, plus pull the cylinder to get something in there to catch what got through, but I also realize not everyone is as gonzo as I am about this stuff . |
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
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Christopher, is your pump going to run the whole time? And where/how are you going to add a return feed to the tank?
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2007 Stella 225
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Ginch wrote: Christopher, is your pump going to run the whole time? And where/how are you going to add a return feed to the tank? |
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8595 Location: Victoria, Australia |
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Christopher_55934 wrote: Ginch wrote: Christopher, is your pump going to run the whole time? And where/how are you going to add a return feed to the tank? |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
Joined: UTC
Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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You could certainly get a float switch that would cause the pump to activate only when the bowl was low. If the pump was noticeable at all while riding, though, I think the constant on-off clicking would drive you nuts after about five miles, though.
Of course, I say this from a position of complete ignorance, never having run an electric fuel pump myself |
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
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chandlerman wrote: ... the constant on-off clicking would drive you nuts... |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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LOL!
I knew I was going to get some crap for that and I know it sounds dumb, but Solenoids have a funny way of making themselves heard and felt, even when you wouldn't think it's possible. |
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
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My first car was a 1953 Morris Minor. It had an SU fuel pump with points. I always found the noise it made comforting... because when you couldn't hear it any more, you coasted to the side of the road, got out the hammer, slid under the back of the car and gave it a light tap. Then off you'd go. Until next time!
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
Joined: UTC
Posts: 9393 Location: Nashville 118 Days Since Last Explosion |
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Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate
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Hah!
My dad had an Austin-Healy in the early 60's when he was in the navy. The exhaust would constantly vibrate loose, so he'd take it onto the docks and get one of the machinist mates to weld it back on about every two weeks. They don't make cars like that any more...for good reason. |
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Ginch wrote: I use one like Ssteam177. I don't have a return line, I have a link/bypass between the in and out with a restrictor in the line. The restrictor I'm using is the little screw-on bit on the end of a spark plug... any smaller and it seems to flood too easily. All of these pumps supply more than you need, which is why you have to deal with excess fuel with a return or bypass. At high vacuum, wouldn't you want the fuel directed away from the carb to make sure it's not getting too much? Just trying to get my head around it... |
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2007 Stella 225
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108 wrote: Ginch wrote: I use one like Ssteam177. I don't have a return line, I have a link/bypass between the in and out with a restrictor in the line. The restrictor I'm using is the little screw-on bit on the end of a spark plug... any smaller and it seems to flood too easily. All of these pumps supply more than you need, which is why you have to deal with excess fuel with a return or bypass. At high vacuum, wouldn't you want the fuel directed away from the carb to make sure it's not getting too much? Just trying to get my head around it... My TMX30 carburetor has a separate needle and seat setup for gravity fed vs pump fed operation or pressure. |
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Christopher_55934 wrote: 108 wrote: Ginch wrote: I use one like Ssteam177. I don't have a return line, I have a link/bypass between the in and out with a restrictor in the line. The restrictor I'm using is the little screw-on bit on the end of a spark plug... any smaller and it seems to flood too easily. All of these pumps supply more than you need, which is why you have to deal with excess fuel with a return or bypass. At high vacuum, wouldn't you want the fuel directed away from the carb to make sure it's not getting too much? Just trying to get my head around it... My TMX30 carburetor has a separate needle and seat setup for gravity fed vs pump fed operation or pressure. I get that the float needle isn't suppose to take the pressures of a pump... But wouldn't all the pressures head to the needle regardless? And having a hose without the restrictor would make sense no? Maybe I'm being dense here... But didn't know the tmx had that... that's a pretty cool feature... |
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2007 Stella 225
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108 wrote: Christopher_55934 wrote: 108 wrote: Ginch wrote: I use one like Ssteam177. I don't have a return line, I have a link/bypass between the in and out with a restrictor in the line. The restrictor I'm using is the little screw-on bit on the end of a spark plug... any smaller and it seems to flood too easily. All of these pumps supply more than you need, which is why you have to deal with excess fuel with a return or bypass. At high vacuum, wouldn't you want the fuel directed away from the carb to make sure it's not getting too much? Just trying to get my head around it... My TMX30 carburetor has a separate needle and seat setup for gravity fed vs pump fed operation or pressure. I get that the float needle isn't suppose to take the pressures of a pump... But wouldn't all the pressures head to the needle regardless? And having a hose without the restrictor would make sense no? Maybe I'm being dense here... (Not sure if this will help or not haven't had a cup of coffee yet this morning. If you have a garden hose with good pressure and try stopping the flow with your thumb you can't, water will get passed your thumb and leak out that is what happens with a needle and seat in your carburetor connected directly to most fuel pumps and causes flooding. Now, you add a "Y" to the hose to allow some water to flow one direction and some to flow the other, the side of the "Y" that connects to the carburetor has more restriction than the other hose on the "Y" with no restriction. Now most of the fuel is going out of the hose with no restriction, or bypass and you aren't getting enough fuel to the carburetor. So you add a restriction to the hose not connected to the carburetor so some pressure still builds up and you get pressure in both directions. The fuel injection system in my older sports car 2007, doesn't have a variable speed fuel pump, the fuel pump is always running at the same speed. It has a pressure regulator on the return side and bleeds off excess pressure and fuel to the gas tank to maintain 68 psi of pressure on the rail that houses the fuel injectors. This is what people are trying to accomplish with the fuel pump at a much lower pressure. My 2015 car has fuel injection with a variable speed fuel pump, it monitors the pressure at the fuel rail that holds the fuel injectors, the pump speed is varied to regulate fuel pressure and has no return line. This results in less pump wear and no need for a return line. But didn't know the tmx had that... that's a pretty cool feature... |
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Christopher_55934 wrote: 108 wrote: Christopher_55934 wrote: 108 wrote: Ginch wrote: I use one like Ssteam177. I don't have a return line, I have a link/bypass between the in and out with a restrictor in the line. The restrictor I'm using is the little screw-on bit on the end of a spark plug... any smaller and it seems to flood too easily. All of these pumps supply more than you need, which is why you have to deal with excess fuel with a return or bypass. At high vacuum, wouldn't you want the fuel directed away from the carb to make sure it's not getting too much? Just trying to get my head around it... My TMX30 carburetor has a separate needle and seat setup for gravity fed vs pump fed operation or pressure. I get that the float needle isn't suppose to take the pressures of a pump... But wouldn't all the pressures head to the needle regardless? And having a hose without the restrictor would make sense no? Maybe I'm being dense here... (Not sure if this will help or not haven't had a cup of coffee yet this morning. If you have a garden hose with good pressure and try stopping the flow with your thumb you can't, water will get passed your thumb and leak out that is what happens with a needle and seat in your carburetor connected directly to most fuel pumps and causes flooding. Now, you add a "Y" to the hose to allow some water to flow one direction and some to flow the other, the side of the "Y" that connects to the carburetor has more restriction than the other hose on the "Y" with no restriction. Now most of the fuel is going out of the hose with no restriction, or bypass and you aren't getting enough fuel to the carburetor. So you add a restriction to the hose not connected to the carburetor so some pressure still builds up and you get pressure in both directions. The fuel injection system in my older sports car 2007, doesn't have a variable speed fuel pump, the fuel pump is always running at the same speed. It has a pressure regulator on the return side and bleeds off excess pressure and fuel to the gas tank to maintain 68 psi of pressure on the rail that houses the fuel injectors. This is what people are trying to accomplish with the fuel pump at a much lower pressure. My 2015 car has fuel injection with a variable speed fuel pump, it monitors the pressure at the fuel rail that holds the fuel injectors, the pump speed is varied to regulate fuel pressure and has no return line. This results in less pump wear and no need for a return line. But didn't know the tmx had that... that's a pretty cool feature... So the restrictor in the bypass side needs to be similar size to the carb float needle hole... if not all the pressure will go to the carb...? |
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8595 Location: Victoria, Australia |
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108, not exactly sure of the physics involved but in reality the bypass lowers the pressure. Prior to the fitting of the restrictor, after a bit of a longer run at mid to higher speeds, you'd pull up to a stop and the thing would flood every time. Ideally you want the pressure to be just a little above what you'd get with a full tank... and continue to get that pressure down to empty.
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Ginch wrote: 108, not exactly sure of the physics involved but in reality the bypass lowers the pressure. Prior to the fitting of the restrictor, after a bit of a longer run at mid to higher speeds, you'd pull up to a stop and the thing would flood every time. Ideally you want the pressure to be just a little above what you'd get with a full tank... and continue to get that pressure down to empty. But now it seems to have spooge coming out of the exhaust... not sure if theres too much pressure still going to the carb... I'll try adding the spark plug end restrictor on the bypass side and see if it evens out the pressure... I would have thought it would make the pressure higher in the carb, but seems like I'd be wrong... |
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