MEMPHIS wrote:i dont know how to convert from cc to hp, but i dont think that the engine you were talking of using could put out 50hp???
and no you wouldnt win. First off half way down the track you would shake the kart into little peices cause a 50hp engine on the back is going to do that at high rev.
What a clueless repsonse, on 2 counts. 1st, I could control my engine speed by my gears, so It wouldnt have to rev realy high. 2nd, 1 and 2 cylinder ATV and Cycle engines are balanced and most run a full circle crank, and some even have a syncro balancer...the engine speed has no effect on vibrations. You show your lack on knowledge on this subject when you say things like this.
second you wouldnt because you are going to be changing gears every 5 seconds until you reach a gear your power house of an an is going to rev out.
Ok smart guy...lets say my engine has a peak torque of 75ft/lbs and occurs at 5000 rpms.
Start in 1st gear, drop the clutch and accelerate to 6000, shift to 2nd, rpms drop to 3800, rev to 6000, shift to 3rd, pull past 6500, shift to 4th, and rpms drop to 3500, pull up to peak torque and hold it there.
I can keep my engine at peak torque through the gears...I can control how well it pulsl through the next gear by how far I take it through the current gear.
Lets say your engine makes 30 ft/lbs or tq @ 4400 rpms.
You start at idle...hit the gas and hold it..the TC engages at 3500 and the engine bogs when it hits..it quickly revs up and past the peak TQ level and you hold it steady at the 6000 rpm redline...thats it, it's as fast as you can go..no more engine speed and you are already in overdrive as far as the TC in concerned.
Im shifting gears, taking advantage of my power curve, finding more speed with higher gears, and the power isnt dropping off.
You go through your power band one time, and rev past it...and thats it.
in my case i have infinite ratio of gears. and even though you have more power. i would guess i have more power per lb of kart. therefore i would still kick your butt.
Like I said..not infinite, not infinitely variable. Like in Jr. dragsters, they use a snowmobile TC because those little 5hp briggs are cranking out over 50hp, and rev past 10,000 revs. The floor it, and the TC hits and goes into overdrive quickly, and they let the tire growth and engine redline make the speed. It's not like it's revving to the redline and the TC is adjusting as they go down the track...
Power to weight...eh, 200lbs kart, 85lbs engine, wheels/tires, fuel, etc..350lbs
50hp divided by 350 lbs = 7lb per hp
But in a totally different veiw i like this idea. I have always wanted a kart with a motorcycle engine on the back of it.
Didnt you say a while back you'd already done this a few times and it didnt work?
so i have come up with this little idea.
I called don jackson at comet, and he seems to think that the 90 TAV could handle the power for a 300cc engine. Like i said before i dont know how to convert cc to hp. so 50 hp maybe to much??
but if this unit could handle the power. it would adjust to any rpm, or torque, or hp you add to it.
now in the end you may eat 5 or so hp.... but i think the infinite ratio would kick some butt on track or off road.
So what do you think all high and mighty red?
CC's dont convert to Horsepower genious...
CC's are Cubic Centimeters...it's a measure of engine displacement.
12.5 ci = 206cc's
20ci = 305cc's
So you would have the same displacement as an 8hp Briggs OHV...
But we all know that a motorcycle desgined engine makes power better by leaps and bounds that a utility engine. Id wager that 30-50hp wouldnt be unheard of from a performance 300cc engine. I mean a 150howhit makes like 9hp, and it's very inefficient. a 300 SYM engine makes about 25, and it's also not built with power in mind. So I feel confident in my 30-50hp range...4 or 2 cycle.
And the infinte speeds of a TC are misleading. you get VARIABLE ratios, until you get to the max travel of the driver pulley.
Now...up to your reply to pick it apart...c ya!
!!! i aint seen you round here in a while!! sorry i cant get video on dail-up. :'( but i beleive ya anyway.
