I wounder how good this carb is?

[swheels]

I stumble upon this carb.I would love to get my hands on this.I think it will open up alot of room and make way for a R.A.S.(ram air system) for our little bikes.I'm gonna look more into this.If the price is right this will be worth it sticky with the 4 bangers for me.thumbsup

[The Nutty Professor]

Dude what search engine do you use? I'm starting to get jealous:) you find these gems and I keep finding pigs earsdunno. Any way that is a smokin carb and you're right about the potential.

[swheels]

Nah you come up with the great stuff.I find the stuff that i can't afford LOL.I seen the price it cost more than my whole bike!LOLHere's the link.
http://www.mmbikes.co.uk/show.php?id=89

[The Nutty Professor]

Yeah I did a money conversion!!!!! DUDE $860! I'm going to see if I can find one that comes on a 1:1 bike then find it on Sleazebay. If we're lucky it will be a four carb bike! Split that up and you have a hell of a findrock

[swheels]

That's a brand new bike with some upgrades.That carb must be only for the sponsered teams.LOL

[The Nutty Professor]

You spark the hunt hunter1 and I fall for it everytime, but that's OK I love it. I got to thinking about what I said about replacement carbs. I looked up a few things and found the Fiat 128. It had a downdraft motorcycle carb on it but I have yet to find a picture or specs on it. Because it's a early 1970's car that might be a problem so I branched out looking again. Don't have anymore leads but I just started. I wonder how hard it would be to adapt a small car carb to one of these motors? I'm also looking at fuel injection. I know the computer is the problem, but if I can work that out screw the carbs. The hunt continues.

[The Nutty Professor]

Here's a cheaper possibility but it's to big. I think the largest we can hope to use is 28-32? I can't remember but I figured it out by the largest motor I could find which was a 180 something. I'll have to go back and find it.

http://cgi.ebay.com/ebaymotors/Mikuni-TM36-68-flat-slide-36mm-Pump-carburetor-Pumper_W0QQitemZ260154125461QQihZ016QQcategoryZ355 97QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[redryderaus]

For the price of that Keihin downdraft carby you'd be better off looking into EFI. I'm trying to think of the Aussie mob who do aftermarket EFI suitable for bikes. If I come up with it I'll post.

Cheers,

red

[The Nutty Professor]

Are you talkign about the Megasquirt?

http://www.bgsoflex.com/megasquirt.html

I thought about it but everytime I read the webpage it makes my head hurtPoke.

[Blitz$M.Inc.$]

thats a crazy lookin carb
i think ill stay basic
tho efi is yummy to think about

[swheels]

Iv'e been trying to locate efi's from like the 150cc's scooters.

[redryderaus]

Are you talkign about the Megasquirt?

http://www.bgsoflex.com/megasquirt.html

I thought about it but everytime I read the webpage it makes my head hurtPoke.

Also keep in mind with any programmable EFI you really need hours on a dyno to set up fuel&ignition mapping. Butt-dynos just won't work here guys. Years ago a mate fitted a Motec (the mob I was hunting for) to a 680CC Honda powered Supermono. He spent over 4 hours on a dyno just tuning it. But it went bloody fast in the end.

I found that mob I was hunting for. Motec. And you don't want to know pricing.

Cheers,

red

[The Nutty Professor]

Swheels good idea using an existing EFI. Anything Motec is bloody expensive!!! I was talking with Swheels about finding existing parts from other applications and using them. I was googling downdraft carbs when the Fiat 128 came up. They had motorcycle carbs in that car. I wonder how many other gems are out there that we have to find? I think we have mentally boxed ourselves in we have to think outside that box.twocents

[redryderaus]

I like the Megasquirt both for features and ECU price. I'm reading up in their forum at the moment. Assembling the ECU kit wouldn't worry me. In a previous career I was a qualified electronics tech. Currently I'm a welder/fabricator qualified in both steel and aluminium. Hence my total lack of fear when it comes to modifying things our even manufacturing from scratch.

A challenge with EFI on our small motors will be finding injectors small enough to work. My understanding is you want your injector running close to 100% at WOT/max rpm. This will give best performance at lower throttle/rpm.

I think the box we are at risk of placing ourselves in is trying to find bolt-on parts that will work with no effort on our part. That is a box we want to stay out of as it will limit us to someone else's thinking.

Cheers,

red

[The Nutty Professor]

I think the box we are at risk of placing ourselves in is trying to find bolt-on parts that will work with no effort on our part. That is a box we want to stay out of as it will limit us to someone else's thinking.

Cheers,

red

Couldn't have said it better myself. I know it takes alot of effort to win and I don't like to lose.

[swheels]

Here's a simple system.
www.arb.ca.gov/research/icat/projects/bkmbrochure.pdf

I'm gonna look into it more.

[schofell84]

Are you talkign about the Megasquirt?

http://www.bgsoflex.com/megasquirt.html

I thought about it but everytime I read the webpage it makes my head hurtPoke.


can you use any injector with megasquirt?


oh, the bkm system would be an unreal pain in the a$$. its a direct injection system like whats used on diesels and some of the new lexus's. you have to design an engine around it

[The Nutty Professor]

With my limited understanding of EFI Megasquirt says you can use any injector and it controls from 1 to 16 injectors so you could have a high low injector system like Ducati has on the 998. Meaning 2 injectors for 11 cylinder. One that handles low speed demands and one that handles high speed. Way complicated but great mental exercise in how-would-it-work.

[schofell84]

that would be killer, but where in the world would you find a low-end specific injector for our application?! ha

a fuel injector from a f4i would probably work very well by itself with a high flow head (read: extensive porting). mmmm id love to see the results of that one.hangloose

ok heres the plan nuttay. ya buy a flat .25" piece of aluminum for the intake base. by a long intake trumpet. cut it to the second intake resonance and drill and tap the hole for the injector. buy your megasquirt and rent some dyno time! WOOOO. sell the set up to midbikers and pitbike motard racers for a small ;) ;) profit. tee hee

[schofell84]

oops i kinda forgot a small thing called a throttle plate but thats just in the details right?