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Easy-X |
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Easy-X Super Spammer
Joined: 08 Mar 2019 Karma :
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Posted: 01:48 - 06 Nov 2021 Post subject: Carbs vs EFI - FIGHT! |
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Following on from the FortNine video Ryan's central argument is motorcycles only do port injection therefore the ECU is effectively running a carb emulation.
These vids have form for being... contentious but I think he's missing a few key points. Emulating a carb means you can emulate changing a jet up or down, swapping a fuel map out for temperature or altitude changes. TBF it's an easy job to swap out a jet on a single carb bike but you do have to stop to do it! Okay, so there's Lectron and SmartCarb missed off the video but they're more a "money to burn" item rather than a viable solution.
Anyhoo, correct me if I'm wrong but surely the elephant in the room is closed-loop. Cruising along in a deliberately lean condition to save all those asthmatic kittens while the water cooling of a modern bike compensates for the extra heat doesn't seem like something you could do with simple carbs
Don't get me wrong though, there's a beautiful simplicity in an old skool, points driven, no battery, AC lights, kick'n'go bike. A condensor and a coil is all the electronics one should need
<addendum> and I'm not sure I buy his rant against ethanol. ____________________ Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter |
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Bhud |
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Bhud World Chat Champion
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Mysteriass |
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Mysteriass Nova Slayer
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temeluchus |
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temeluchus World Chat Champion
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xX-Alex-Xx |
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xX-Alex-Xx World Chat Champion
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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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Posted: 08:34 - 06 Nov 2021 Post subject: |
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Carbs - often neglected and not properly cleaned during recommissions, plus they can easily be fuhked with by the mustgofaster brigade. Thus they get 'carbs is crap 'rep.
vs
EFI - rely on sensors 'n' stuff which are difficult to test also high pressure fuel pump microprocessor board etc.. = too much stuff to go wrong (for the amateur)
six of one ... ____________________ Now: A100, GT250A, XJ598, FZ750
Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600 |
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MarJay |
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MarJay But it's British!
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Robby |
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Robby Dirty Old Man
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Polarbear |
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Polarbear Super Spammer
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Blah blah |
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Blah blah Scooby Slapper
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Kawasaki Jimbo |
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Kawasaki Jimbo World Chat Champion
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pepperami |
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pepperami Super Spammer
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Posted: 13:52 - 06 Nov 2021 Post subject: |
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Of the bikes I’ve owned and ridden in my biking life, most have been carbed.
I’m not of the “must go faster” brigade.
Only two bikes with carbs have been fuelling problematic.
A nasty BSA Bantam and a hateful Yamaha XS 400.
Even my CZ 125 with it’s Jikov carb never gave me any real fuelling problems.
Any problems with any of the other carbed bikes was relatively straightforward. (Keeping it standard).
Any fuelling problems with any of my fuel injected bikes have always had to go to the shop at a big cost and much inconvenience.
Give me slide carbs any day.
My ____________________ I am the sum total of my own existence, what went before makes me who I am now! |
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kolu |
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kolu Nova Slayer
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Ayrton |
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Ayrton World Chat Champion
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Easy-X |
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Easy-X Super Spammer
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WD Forte |
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WD Forte World Chat Champion
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Easy-X |
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Easy-X Super Spammer
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WD Forte |
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WD Forte World Chat Champion
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xX-Alex-Xx |
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xX-Alex-Xx World Chat Champion
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Bhud |
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Bhud World Chat Champion
Joined: 11 Oct 2018 Karma :
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Posted: 20:03 - 06 Nov 2021 Post subject: |
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Multiple carbs can be difficult to set up correctly.
On the old Kawasaki 4-cylinder bikes, removing the bank of carbs is a pain in the neck. A lot of swearing and getting cuts all over your hands (and possibly breaking the tab that aligns your clutch cable with your clutch pivot) is on the cards when you try to remove them. Then, of course, once removed, you have to clean them and (by now) renew seals as required, between them. This means taking them all apart and splitting them. You may find that a couple of the steel pins that hold the float have seized solid. You can't head them up or you'll melt the plastic floats. You try knocking them out by bracing their supports, but you fail, and you break the carb body. You search for a new carb body, and you find they're REALLY expensive. You have no choice so you buy it anyway. You put your carbs back together. A diaphragm has a hole, you find. You can't find one so you fix it with a latex glove and vulcanising rubber. You roughly bench synchronise your carb bank. You put it back on the bike. Your carb holding rubbers are too hard. You get some evergreen oil and try to soften them. It works for 3 out of 4. You search online for a new rubber. You find they're still being made, but they're slightly different - they no longer have the brass spigot used for balancing the carbs. You cut your hands up again putting the carbs back on the bike. You start the bike and it races. You discover a very tiny vacuum leak. You solve this with some Threebond. You haven't properly balanced your carbs, and you cannot, because you don't have that carb rubber with the spigot. You ride around for a bit and the Threebond degrades at over 150 degrees. The vacuum leak returns and now you have to fix it again.
If your main purpose in buying that bike had been to enjoy riding an old beast of a sportsbike like an early GSXR, or simply to have a capable long-distance bike for commuting or touring, you hate carbs by now... |
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Easy-X |
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Easy-X Super Spammer
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Bhud |
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Bhud World Chat Champion
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Easy-X |
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Easy-X Super Spammer
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Posted: 23:30 - 06 Nov 2021 Post subject: |
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We do still get overenthusiastic youngsters on the forums trying to squeeze some extra horses out of their 50cc scooter, a year seemingly like an eternity at 16. But the "carb aware" are generally the older generation ____________________ Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter |
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trevor saxe-coburg-gotha |
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trevor saxe-coburg-gotha World Chat Champion
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chickenstrip |
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chickenstrip Super Spammer
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Posted: 00:08 - 07 Nov 2021 Post subject: |
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Never had a problem with carb bikes. Never had a problem with the two FI bikes I've owned, including one back in 1985. ____________________ Chickenystripgeezer's Biking Life (Latest update 19/10/18) Belgium, France, Italy, Austria tour 2016 Picos de Europa, Pyrenees and French Alps tour 2017 Scotland Trip 1, now with BONUS FEATURE edit, 5/10/19, on page 2 Scotland Trip 2 Luxembourg, Black Forest, Switzerland, Vosges Trip 2017
THERE'S MILLIONS OF CHICKENSTRIPS OUT THERE! |
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Old Thread Alert!
The last post was made 2 years, 171 days ago. Instead of replying here, would creating a new thread be more useful? |
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