Killer Ducky Yamaha / update: kart render 4.12.07

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lmracer

lmracer

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i am totally having a good time with my product development class at my school. the program is mechanical design and the project is called "killer ducky" its a 600cc yamaha powered go-kart. six speed sequential and forced induction. should be a blast when its done

i will keep the public updated as the project progreses: ​


February 24 2007

the engine was donated to our group by a classmate. it has been fabricated to the point of near completion. the frame has been contracted out to a fabricator due to time constraints. (has to be done in two months)

so far:

the steel box on the end of the carburators is the intake manifold. yet-to-be fabricated is the tube connecting the exit of the intercooler (that big square radiator) to the manifold. we had the flange that holds the turbo to the exhaust CNC'd out of steel. The intake manifold was cut and welded by us. the exhaust itself is made out of the stock pipes. we bent, cut and spliced them to the flange. the spacers between the carbs and the head were fab'd out of steel conduit. the rubber couplers were all purchased from Farm and Fleet. the turbo was a freebie from Diesel Specialists LC. the frame design has been contracted out to be built by a friend of our Product Development instructor. within about a week, we fired it up! stand by. we very well have made a time bomb. and it may not work at all :scared:

please ask me any questions you may have! i love talking about this thing! :D









<<thats my team hard at work>>​



<<thats me hard at work>>​



these are some older pics reaching as far as a month ago​

​
 
Make sure you put some good rubber on it. With the weight and power being like that, traction is bound to be an issue.

Are you guys going to build a chassis from scratch or buy one? (seeing the time restraints)


150hp from a 600cc is not to bad, I would have gone with a 2 stroke motor though...
 
Make sure you can make it street legal! :D Man that would be freakin sweet...
 
opendriver19a
Make sure you put some good rubber on it. With the weight and power being like that, traction is bound to be an issue.

Are you guys going to build a chassis from scratch or buy one? (seeing the time restraints)


150hp from a 600cc is not to bad, I would have gone with a 2 stroke motor though...
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well, its getting trailor tires ang wheels. i know, i know. but we cant afford a set of MT's. unfortunally that means it wont perform that well. thats too bad.

we designed the chassis. i will post pics of the technical drawing. it is being contracted out to a fabricator though. we dont have the time to build it. it needs to be done in one month :indiff:

no way would i go with a 2 stroke. its going to loud enough as it is.

Matthew Keller
Make sure you can make it street legal! :D Man that would be freakin sweet...
Click to expand...

not a chance. while that would be cool, we want to conform as closly as fiscally possible to the FSAE contract. we are trying to go legit.

again though we dont have the time to make it a competitive or entirly legal machine yet. it will have to evolve in future years. we could be competing by 2010 or so. that is why trailor tire are going to have to suffice right now. 👎

but what we will get is a rubber melting banshee screaming devil machine :crazy:
 
HOLY fricking... that motor is going to be a beast, and not completely in a good way. my first thoughts were that thats a huge turbo for a 600 cc engine but i assume it's a motorbike engine right? considering it should rev like crazy i hope the poor turbo dosnt run out of breath at high rpm. nice touch on the intercooler. are you planning on feeding it with a scoop of some kind? At any rate, 150 hp from 600 cc is verry nice.

Man, ticking time bomb indeed, with that turbo, the more i think about it the more i fear what will happen when you finaly get to open her up. :scared:

But this is an awsome project, something i'd love to do myself. huge thumbs up. 👍
 
Did you use stock carbs? How are you fueling it? Are the carb's boost referenced since they are blow through and not enclosed?

I thought putting both sides of the carb at boost pressure is the easier way to design these things, I am curious why you chose a blow through design.
 
inferno
HOLY fricking... that motor is going to be a beast, and not completely in a good way. my first thoughts were that thats a huge turbo for a 600 cc engine but i assume it's a motorbike engine right? considering it should rev like crazy i hope the poor turbo dosnt run out of breath at high rpm. nice touch on the intercooler. are you planning on feeding it with a scoop of some kind? At any rate, 150 hp from 600 cc is verry nice.

Man, ticking time bomb indeed, with that turbo, the more i think about it the more i fear what will happen when you finaly get to open her up. :scared:

But this is an awsome project, something i'd love to do myself. huge thumbs up. 👍
Click to expand...

the turbo is a TO4B with a T5-T6 compressor wheel. it has a small compressor wheel, so mid range tourque is what we will most likely see. the intercooler will be fed by a cowl scoop that we are making out of ABS plastic. we are using a thermoformer to make it. we plan of using the intercooler as an ice tray for some dry ice. im not sure if its worth it though.


skip0110
Did you use stock carbs? How are you fueling it? Are the carb's boost referenced since they are blow through and not enclosed?

I thought putting both sides of the carb at boost pressure is the easier way to design these things, I am curious why you chose a blow through design.
Click to expand...

the carbs that came stock with the bike were missing their foat bowls. we were forced to pick up some used ones off ebay. the new ones came off the same make bike, yamaha. but our bike is a YZ 600 and the new ones are off a YZR of the same displacment. they are up in intake millimeters from 28 to 30, and we gained 70 cfm.

we have a good speculation of how they will react to boost pressure. after speaking with our school's small engines expert, we are pretty sure the pressure on the manifold will also pressurize the floats focing more fuel out of them and into the cylinders. which is essentially what we want. we considered a boxing in the carbs, but the problem facing us then would be hooking up the vacuum lines and idle pressure. we are only going to run a small amount of boost with this set-up. maybe only 2 pounds at first. if things work well, we will set the wastegate to allow more. we dont want to blow it up on the first run though so we are going to play it safe.

these are some early frame models. the finalized file will be up later.

note: that is not where the fire extinguisher will be going ;)







 
That is so awesome, I love the top mount intercooler taken from a Turbo II FC. You're gonna call it the Killer Ducky? I'd call it the Scooty Puff Junior. You should try and fabricate a functioning Formula 1 style nose cone on the beast.
 
ND4SPD
That is so awesome, I love the top mount intercooler taken from a Turbo II FC. You're gonna call it the Killer Ducky? I'd call it the Scooty Puff Junior. You should try and fabricate a functioning Formula 1 style nose cone on the beast.
Click to expand...

we may be able to do that. im not sure how efficient we could make it though. a quick flow analysis may help us make adjustments.

Mach&#7886;ne;2584818
I showed this thread to a friend.

They said: "Needs moar Yamaha R1 motor."

:lol:
Click to expand...

:lol: i agree with him.
 
lmracer
the carbs that came stock with the bike were missing their foat bowls. we were forced to pick up some used ones off ebay. the new ones came off the same make bike, yamaha. but our bike is a YZ 600 and the new ones are off a YZR of the same displacment. they are up in intake millimeters from 28 to 30, and we gained 70 cfm.

we have a good speculation of how they will react to boost pressure. after speaking with our school's small engines expert, we are pretty sure the pressure on the manifold will also pressurize the floats focing more fuel out of them and into the cylinders. which is essentially what we want. we considered a boxing in the carbs, but the problem facing us then would be hooking up the vacuum lines and idle pressure. we are only going to run a small amount of boost with this set-up. maybe only 2 pounds at first. if things work well, we will set the wastegate to allow more. we dont want to blow it up on the first run though so we are going to play it safe.
Click to expand...

Thanks for the detailed reply 👍 Sounds very good.

At 2 psi the stock carbs probably ought to have no problems, but at anything more than 6 psi you'll at the very least need the fuel pressure to increase as the boost comes on :)

I'm sure you'll have a lot of fun with this
 
skip0110
Thanks for the detailed reply 👍 Sounds very good.

At 2 psi the stock carbs probably ought to have no problems, but at anything more than 6 psi you'll at the very least need the fuel pressure to increase as the boost comes on :)

I'm sure you'll have a lot of fun with this
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we shouldnt be boost higher than that, so we should be okay. 👍

thanks! i already am!
 
inferno
Considering the compression ratio of that engine, most definately. or have you done work to the internals?
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no internal work by us, however the engine was completely tuned up by the school program. major head work including honing the exhaust ports as well as reseating the valves. and all seals are replaced.
 
GTRacer4
Put a wheelie bar back there then! :D
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traction is not in the game plan. do to budget and time constraints, a rigid suspension will be our only option. :p


it probably wont perform well on a track, but it will be blazingly fast and thrilling :D

due to low grade rubber, (unless we get a donation) there wont be enough traction to wheelie
 
I can understand handling not being a priority, it's a hard thing to do, you will have no steering when you're flooring that thing.

What if little Timmy runs infront of you?
 
lmracer
traction is not in the game plan. do to budget and time constraints, a rigid suspension will be our only option. :p


it probably wont perform well on a track, but it will be blazingly fast and thrilling :D

due to low grade rubber, (unless we get a donation) there wont be enough traction to wheelie
Click to expand...

If you can find an old motorcycle, snatch the rear shocks and mounts off of it. That should take some of the load off
 
lmracer
well, its getting trailor tires ang wheels. i know, i know. but we cant afford a set of MT's. unfortunally that means it wont perform that well. thats too bad.
Click to expand...

Yikes. For a vehicle of that HP/weight, you're are going to have virtually no traction with trailer wheels. :scared:
 
ExigeExcel
I can understand handling not being a priority, it's a hard thing to do, you will have no steering when you're flooring that thing.

What if little Timmy runs infront of you?
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timmy's in trouble. on top of that, we are only using the donor bikes dual rear brakes mounted to the rear axel. we will have to be careful not to lock them up.

again. the only good performance we are going to see out of this project is straight line acceleration. the next generation of design students are going to have to make it handle
 

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