Electric VS Vacuum Fuel Pump on Maddog 50 GY6 139QMB
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- Опубліковано 5 вер 2024
- Icebear Maddog 50cc electric fuel pump test just for fun. Don’t really need the electric pump yet. I had to make a really long run to start noticing the difference. I like the electric pump mainly so tuning the carb is not a hassle and the bowl fills immediately after jetting changes. Once I get more mods and a cam and fuel demand goes up the pump will be more useful.
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I think you put it best when you said they were designed and work perfectly for an engine that is governed at a specific rpm.
You explain things very well. I'm not good at explaining but I do know I've seen several scooters with more issues with those vacuum pumps. If it's not gravity fed then it's always having fuel delivery issues.
So true
Awsome intro. I’ve been saying this for years thank goodness you made a video that has true facts. Awsome. Thank you
Great video..
My old honda helix used a electric pump..what some people forget to understand is where the gas tank location plays a part as well trying to pull fuel from under the engine is hard.. I believe even the honda ruckus runs a electric pump as well because of the location. Great info 👍
Thanks. Ya I have the honda ruckus pump on another bike.
😂😂 That intro
You couldn’t be more right. I have seen this with my own eyes. However, I did one better after having my electric fuel pump leave me stranded. I installed a Y and a second line which I can switch at the fuel filter that goes to a vacuum pump. Hopefully I will not have another electric fuel pump failure but if I do I’m ready.
Whoa..... LOVE that idea!
Would love to see your take on it. I just used a brass valve and a Y at the tank. Then I used a valve on the vacuum line so the pump doesn’t actuate all the time. I simply swap over the line going to the inlet of the filter unplug the electric and valve in the vacuum.
@@wesmadebuilds681 is the valve just like an inline fuel on Off valve?
@@GhettoWrench the valve is right after the tank, but that is just so I don’t make a mess if I want to work on something later on. The other valve is on the pulse line so the fuel pump is working all the time and all worn out. I just go into a Y right after the tank. One side goes to electric and other pulse. The discharge is what I swap around as needed. You could get fancy with valves but I already had a lot in the system.
Dude your bike look good an probably run good. Mine doesn't
I'm suspecting the same issue with my 72cc build. After jetting it and taking it for a ride, I manage to get it up to 50 mph (Probably more around 45 but didn't have my gps speedo app on) then it started dropping back down to 40. When I turn off and got back on the throttle the acceleration was slower than when I first took off. But then when I stopped for a moment then proceeded, I was back to normal acceleration. Considering finding a electric pump solution or just go full gravity feed with a shut off valve.
Sounds like it for sure
I'm legitimate planning to set up a high pressure boost regulated fuel system on one of these because they're such a cheap engine test platform. I can go get a trash moped for like $100.
Someone set up electric boost with an EGO leaf blower or an AMR300 already...
I really want to do that too. Was looking at some goofy ones on Ali Express. Would be fun to compare a few different ones
Not sure if it exactly applies, but I picked up a cheap electric fuel pump and have been trying to apply it to my 150(the pump is just on when the key is on). It feeds fast enough for sure, but this carb sat a season so I've been having problems idling it. It runs at a so high rpm that the rear wheel engages at all times. 😵💫 The pump seems to be working choice tho.
@Hackxcore If you don't have one already, you will probably need a regulator of some kind to regulate the pressure down to a few PSI. There are regulators that you simply set with a dial, or there are boost reference regulators that adjust the pressure based on how much boost pressure is entering the intake/carb.
This is the way to set up a blow thru carburetor with a turbo or whatever so that the carb gets a few more PSI of fuel than the overall air pressure entering the intake.
@tedowen409 I'd love to see you do a video on regulators. Show you overkill
I've got a $45 amazon one in mind currently, but I haven't investigated if it would work yet.
"Adjustable Fuel Pressure Regulator 8AN Gauge EFI Bypass Kit Boost Reference - 1:1 4-65 PSI Silver+Black"
@Hackxcore when it sits with gas in the carb the pilot jet gums up. You just need to clean that. You must see daylight through the hole when holding it up to the sky or it is not clean enough. Have to have a pretty small needle to clean them out usually
Way to shut up those keyboard warriors with facts.👏👏👏 Great explanation on how vacuum works.
LOL. Thanks
Solid explanation. 🤙
Question if you us a vacuum pump and put a small gravity tank would that work? Like a split and have the small tank keep pressure in the cab?
Exactly what did in this video. Works great
ua-cam.com/video/qid8pSHsVcA/v-deo.htmlsi=NMajv28CLdrNi87p
What type of electric setup do you have on your bike? I'm getting ready to get something.
@@seanmayo206 cheapo Amazon 2 to 4 psi pump. Carbole brand I think
I have the GenV same one you have. Just put 100 miles on it. Today I took it for a couple miles at 55mph n it started slowing down then I slowed down n it was fine. 🤔 I'm putting uni filter on next week and ordered jets too. Should I increase a jet by 2? Also di you recommend A china electric fuel pump for genV from Amazon as an upgrade? Or is vacuum fine? Looks like you lean electric but you spoke highly of vacuum I'm 😕confused😮.
@xDragonHawk 55mph... guessing that is a 150? On a long high speed run you are making zero vacuum and will run out of gas. The bike bogs down and start dying until you close the throttle some and make vacuum. Vacuum is fine for the city but you live in rural area and hold the throttle open long periods or have a 50 and always hold the throttle you need an electric pump to keep up. Or you can just understand the vacuum weakness and just close the throttle to fill the carb again then go again.
@@GhettoWrench Thank you my dude! I like the throttle down tip to recover!!!
I got a simple question lol. I have a maddog 150cc gen 5. I'm planning to upgrade to better fuel lines. Not sure of it's 1/4 or 3/16. I'm new to this.
I have a whole drawer full of wrong size fuel lines. LOL. The one from the gas tank and the one on the fuel pump are bigger than the one on the Carburetor. I just got 5mm line from China so no idea what size it is in inches, but it seem to fit everything good. I think it is between 1/4 and 3/16... but closer to 3/16 (4.7mm)
@@GhettoWrench thx for the reply 👍
Im getting ready to do start and stop standalone switch's is it simple to wire them up?
Easy to wire. If you have a Gen 1 or 4 you may need to bring the 12v DC wire to the back where pump is from the front. But put your switch inline on that wire. If you have Gen 5 you will have a 12v DC wire in back already. I have a video showing wiring the Gen 4 and a Gen 5. The Gen 5 I use a rolling wrench pump, but same wires will work.
@@GhettoWrench I have a gen 5 with no rolling wrench pump as of yet
@tedowen409 is it just 4 wires? 2 for the kill switch and 2 for start button
@michaelhatala no. Wore the pump. 2 wires.. a ground and 12v hot. The on Off switch is ONLY part of that hot 12v wire. Imaging just cutting the 12v wire and putting the switch on the 2 cut ends you made. You will have to run that wire from the source to where you want the switch then back to where you mount the pump.
Would it be easier to watch the video. I'm kinda confused
I'm with nature an gravity
Gravity is by far the best
Bike been down for weeks. Money. Is tight. I got 64mm rockers cam an head for 51mm piston from rolling wrench in Denver on top of a 47mm piston an cylinder from gy6 store in NC. My carb is definitely no good now an probably the head situation. I need a carb. I can spend a lil. What's that nibbi setup u was working on?
@seanmayo206 19mm nibbi. If u get the plain aluminum one and not black and red they are pretty cheap. $36. But you can get cheaper on aliexpress
@@GhettoWrench I got one last night . 175$ pwk carb with cable an uni filter an adapter an jets Did I over pay u t
@seanmayo206 WTH my last PWK was like $26
If u have a vacuum port before the butterfly I will have high vacuum at high speed.and after the butterfly high vacuum at low speed.If u want and can set ur float right eliminate both pumps.even electric and let the scooter run.
Oh man.. never even thought of that. Good stuff. Thanks
I tried to argue with him but you can't argue with stupid lol
IKR... I just bit my tongue. Figured next time I would reply with some proof so I made the video. Too funny
@@GhettoWrench when I told him if I WOT for a couple miles or 5 minutes I would have fuel cut. Installed the electric fuel pump from Amazon and haven't had a problem since. The response was why are you WOT that long?! Lol I live in Iowa out roads out straight and long and speed limit is usually 55 so I have to. He came back with your bike isn't tuned right or there's a problem with it. Um nope lol carbs good and clean, fuel is new, valves been adjusted, no vacuum leaks. But it's my bike. Yea ok.
@churchhalfling ya that dude is a smart ass online. I would like to see if he talked to me that way in real life.
Do these people not know how engine vacuum works? WOT= no vacuum. No vacuum = no fuel.
@@markdavis29 they don't. LOL. That's why I keep telling them. They teach them gender studies in school now.
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