New in frame 4 stroke kit in development!

GoldenMotor.com
tyrslider

tyrslider

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Good stuff, man. Still shootin for spring. We just want to do a reasonable amt of testing/experimenting to be sure we have ruled out common sources of trouble. I should say that there are several little things that need be sorted for the motor to work well for our application e.g. gov, throttle linkage, the choke lever is long and easy to bend w/ right leg. So there's a lot of tightening up loose ends too. We're definately excited to bring this product to market, but it must be simple, elegant, and trouble free!

I just test road Dans prototype last night w/ the new pulley and bearing arangement. Having just redone my throttle linkage to recover another 1/4 turn of throttle (originally only had 1/4 turn now more like a 1/2) I was pleased w/ better throttle control and more power. This set up really is smooth and the new pipe is a nice balance between stock an totally free flowin' straight.

The other upside is that on flat ground it will start from a stop and still tops out in the mid thirties. I'm still an advocate for pedal start for a # of reasons e.g clutch wear, excersize, keeping up appearances w/ the fuzz, smoother faster starts (of course Ime & Imho) etc.

Anyway, good work! Keep Doin' Good Things, Evan FBC
 
Creative Engineering

Creative Engineering

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Dan said:
Awesome Jim. Honestly I had thought the gov was for longevity, not purpose. Very, very cool and thank you. Could solve a whole bunch of "huh?"s (stuff I didn't get)
Click to expand...
Dan,

You're welcome!

I've been watching the 4-cycle threads. Good stuff from all involved!

In 92' I bought my boys a go-cart with a 5 H.P. Briggs & Stratton engine...the governor was in-place just like any other small stationary application engine.

I called the engineering department at Briggs, and they told me why they are governor set to run, 3,600 rpm's: continuos duty generators. It was just a number that stuck over the years!

Manufacturers of other products that use these small engines base their designs around these 3,600 rpm engines. It's what's available.

No manufacturer is going to go to the trouble of modifying an engine in production...not even the go-cart builder.

I removed the governor and the engine would turn about 5,500 rpm. Don't quote me on this, it's from memory and speed calcs. It was just the typical flat head 5 horse Briggs that has been in production forever. My boys played with it for years, and the engine never did blow up!

Not to bore everyone to tears, but just as another example...the diesel engine manufacturers have tier levels for the application of their marine engines.

The 3208 CAT comes in three different configurations depending on the type of vessel.

Continous duty, Medium duty, and a turbocharged, aftercooled, version for race boats.

The small engine manufacturers could have done the same thing...there wasn't an application, so it never happened.

This little OHV HF engine is far superior and should turn up the revs pretty good! We'll see what happens.

Jim
 
Creative Engineering

Creative Engineering

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ocscully,

Certainly no offense...but that description on that web page was a cobblers approach to removing the governor...for any engine! The method of removing the governor in the HF engine, that I provided, is accurate...I did it myself, and posted the "how to" based on actual experience.

Jim

P.S. I think I'll go away for awhile...from 4-stroke stuff...you guys have fun!
 
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F

Felton

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NOOOOOOOOOOO don't go a any where.

Oh yeah thanks for the help. I can't wait to see what you come up with.
 
glacknoid

glacknoid

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Jim is right, don't pay attention to the way other gov's are removed this engine is made different than other larger clones in some ways. The way Jim removed this one is surely the best way unless you think you can manage to get some tool down in that tight area and put enough force on it to pull the gear up off the shaft, or pry it up but you may put more effort in that way.


Like he said there is no clip holding the gear onto the shaft it's molded around it.
 
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MaxPower

MaxPower

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you don't even need the video. Just record the sound. I know you could make a cd... you know like the sounds of rain and ocean waves. I could sleep to the sound the that motor. I can't wait to get mine going.
 
Dan

Dan

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May 25, 2008
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Max not to ramble on TS's thread but working on making that a free down load ring tone thing. Is really cool. Instead of bRining, bring.. it would be "broom broom" lol
 
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tyrslider

tyrslider

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Rambling is just one of the things that makes this thread Great!

Glack, it's 9.69:1

It's interesting to note that most everyone who talks about this motor refers to the torque. Many of them still don't understand this motor's power/torque curve. As this motor and many of the other generator motors develop more torque at the top of their powerband i.e the torque curve keeps going up past the max recommended operating speed, whereas the Honda drops off just before it's redline. This motor shines at top speed. To make a true hill climber out of this motor you'd need to gear it quite low which would make for a very slow top speed. I think some of the original pioneers of the use of this motor in a bicycle didn't quite find it's sweet spot. It is possible too that some wanted most of the grunt off the line. Don't get me wrong, it would be nice, but everything has it's compromises.

I think most folks are gonna want very similar o/a gearing to what I have as we now have the range broadened to 0-35ish mph and We've bearly scratched the surface of minor to major mods that can greatly improve this motor's "I think I can" factor.

Because this is where it gets fun. As I have stated many times before: the Honda 50 etc are great motors, tried and true, pretty dialed in. Th HF is a diamond in the rough. We've got it now to where, even w/ our rpm limitations we're pretty closely matched w/ the Honda. It has plenty of torque through almost all it's range but loses a bit at the top. The Hf lacks a little low end but has lots up top all the way past redline.

Yes, yes I'm getting to the point remember how I started this post.

So the beauty is every rpm we recover up top helps those who want low end torque and those who want more speed e.g. If we can make it run faster then we can gear lower to recover low end w/o sacrificing top speed or if we like top speed we simply leave the gearing alone and gain top speed.

Jim examining this motor and offering some expertese has really helped progress the possibilities of this "little engine that could" faster than we could have hoped. W/ all the work that goes into this it has been hard for me to give the motor it's own R&D time in. Let alone the fact that Jim brings unique experience to the table (thanks again Jim).

And so ends my Ramble! Truly Fun and Exciting!
 
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tyrslider

tyrslider

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Forgot an important emphisis on the fact that this motor properly geared outtadabox has a higher top speed potential (+hp=+speed) than the Honda etc motor. W/ a 1 spd you'll have to pedal start to exploit it but it does have more power.

Just realized that this may have sounded direspectful to Honda owners. Please understand that I don't think of one as better than the other (I own both and love'em) they are different. The Honda is a well rounded motor. Because the Honda is the most common it is a comparison that means something to the most people. They are meant to be fair comparisons of both's strengths and weaknesses by me in my experience. Thanks, Evan.
 
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glacknoid

glacknoid

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I'd like to hear how the HF does with a shift kit. You would eliminate the need for the freeewheel sprocket on the jackshaft and you could have a wider range of lows and highs, coasting and peddleing solo would be easier It's not that I want to go super fast, I mean I have a Honda Valkyrie that goes 135mph but I don't go that fast, ok maybe a couple times, but knowing that your not at your limit at 35 is nice so your engine isn't maxed out most of the time.
 
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