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Post by godlesscommie on Feb 17, 2013 21:12:14 GMT -5
I am installing a big bore kit on my BNGY6 150cc scooter. Here's the link to the kit I am in the process of installing: www.scooter-atvparts.com/Big-Bore-Kit-Complete-170cc-GY6-With-Exhaust.htmlMy question is, would an EFI set up be better than the 30mm carb this kit comes with? I am currently looking into the MBE kit, and it just happens to be on sale, with $100 off... Does the EFI kit offer appreciably better performance - and power - over a 30mm carb with this particular setup? Thanks! |
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Post by prodigit on Feb 17, 2013 21:26:59 GMT -5
If you program the right EFI system with the right parameters, it'll get a better fuel efficiency than a carb, and in some cases minor performance improvements have been noted.
The thing is, that on a Carb system, the cylinders suck the air and fuel in, while on a Fuel injection system, the fuel and air gets injected at a high pressure (usually 6BAR) in the cylinder, causing kinda the same effect as if you had a larger bore, or turbo or something, meaning more HP or performance out of your engine.
Plus, an EFI will regulate the optimal A/F ratio, depending on the environment (rain or dry? cold or warm?), and fuel type (87, 91, or 93 oct fuel?); something you can't do with a carburetor.
That being said, I've read that a carb set up in optimal conditions performs just about the same as an EFI system; however, what is an optimal setting today, may not be so a few hours from now; and an EFI can adjust it on the go!
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Post by skuttadawg on Feb 17, 2013 22:01:30 GMT -5
EFI is the way better option in everyway from MPG , instant starts , crisp throttle response as it never stalls or bogs and huge performance gain . My Echarm has a Ducatti EFI but its a closed system to where only authorized dealers can tune it and both in town did not wan to touch it . I have seen some aftermarket piggy back program modulators but I can not find an article on any one using it . Now with www.ecotrons.com ( same kits MBE sells ) you get software to to use on any pc in order to fine tune it and set or remove a RPM limit which is super sweet to me . Its not a simple bolt on as you will need to drill a bunghole in the header for and oxygen sensor or buy a pipe with it if you can find one , replace the fuel lines . Now there is more than option in throttle body and injector size so do as much research as you can to narrow it down which may be your best bet unless you can afford to buy the extra parts to test out . Everyday I read carb problems like clogged jets , bogging , too lean and sealed up to restrict tuning . With EFI the ECU controls the idle speed and rate of flow adjusting according to RPMs and temperature etc . I have yet to read about an EFI problem here , not saying there is not at least one . The only thing to ever worry about is the electric pump requires power so some may want to upgrade to an 11 pole stator and or larger battery . The pumps are not power hungry but the stators really only put out just enough power for the lights and charge the battery unlike a car which can easily power accessories . I am lucky my Echarm has a 12 pole stator and strong battery 12 amps I think but it must always have a charged battery as it did not come with a kick starter . I asked my scooter dealer why not and he said his truck does not have one ether . I only had one other two wheeler without a kickstart . Regardless if its below freezing ( very seldom is here ) or above 100 degrees starts up with a fraction of a second . Note When I turn the key I let the fuel pump pressure up the line prior to starting . I also have a trouble or dummy light should something like sensor detect a problem or go bad I can count the flashes and look up the code for it . It also has a computer lead for a diagnostic computer about the size of a tablet ( my dealer has one ) . Unsure if the Ecotrons kit has this feature . With EFI I have so much more power at any time which gives me an edge over a carbed GY6 150 . All of my friends who have a GY6 all said they were impressed how much faster my scooter is than theirs . So do lots of research and you may want a buddy to help you or some may opt to pay a pro to do it for them . This summer ( I hope ) I want to get the 2T EFI kit with dual injectors for my 2T project With EFI you NEVER want to run completley out of gas as the injector may require removing to prime it where a carb its no biggy to run out of gas and fire it up after a refill I have read some Gregs post on his EFI kit but it was on a 139QMB not the GY6 but it should be the same but larger sized If you get it please post your adventure with it |
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Post by godlesscommie on Feb 17, 2013 22:23:14 GMT -5
Thank you for such considerate responses. I am not worried about the installation or the tuning, at all. I have been very active in car engines for quite some time now, and my latest project is my current car, a '99 Miata which I have modified heavily. And, I do not mean park bench wings and neon running lights. I installed an MP62 supercharger with a TDR intercooler, an individual port water injection system, handmade COP conversion, a complete fuel system modification, custom coolant reroute, custom LCD gauge screen (8 gauges in a single din display), and wired in a standalone MS, plus larger brakes with handmade caliper adapters, and more... I also replaced the pistons with 84mm 9.00:1 forged JEs, installed forged 600hp rated rods, stainless valvetrain, etc as I "built" the engine. The only thing I did not "make" myself was the custom exhaust system. I even vacuformed new headlight housings for my bi-xenon conversion project. So, I consider myself capable of tackling an EFI conversion project..  I could also use my current tunerstudio setup to fine tune the system on the scooter. My only concern is whether or not a conversion will be worth the asking price... May I ask if you have done any mods for top speed on your setup? |
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Post by prodigit on Feb 17, 2013 23:31:54 GMT -5
not to mention that when an EFI system breaks down, it's considerably more difficult to fix, maintenance to it is virtually non-existent, and considerably more costly to replace too!
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Post by edfr on Feb 17, 2013 23:46:59 GMT -5
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Post by justbuggin on Feb 18, 2013 0:32:24 GMT -5
i am the one he is talking about and have very little problems with my system all that i have had to go wrong is a simple blow fuse i do suggest to upgrade the charging system to an 11 pole stator and getting a bigger battery
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Post by wilds on Feb 18, 2013 2:28:37 GMT -5
I have Ecotrons EFI on my scoot and it's perfect! www.ecotrons.com/Small_Engine_EFI_PNP_kit.htmlEasy install, great and fast support from Matt at Ecotrons. Engine starts within a second. It has a connector to the computer so you can log and send him the files so he can have a look at them if you have any problems. There are loads of settings in ProCAL you can play around with if you want. Mail him all questions you have about the EFI-kit and he will answer. The support from MBE is miles after ecotrons. |
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Post by edfr on Feb 18, 2013 3:01:37 GMT -5
Put up some pictures of your EFI so folks can see the installation on a scoot.
Lefty
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Post by wilds on Feb 18, 2013 3:39:27 GMT -5
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Post by sharks06lly on Feb 18, 2013 10:00:15 GMT -5
i would def get a efi kit i hate carbs they are a pain in the ass lol i mean they are easy to work on buy i feel they are outdated efi is just the sh!t right now
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Post by wangchicken on Feb 20, 2013 1:44:43 GMT -5
check out my build project sunkist www.youtube.com/watch?v=_X4a8QTqqgY. carb is just as good as efi just so happens efi is practically infinitly adjustable on the on its own car is not you must turn screws and swap jets etc , but one is no more better than the other if you can not set up, install and tune properly |
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