Hi all,
Bit random I know, but my project thread is gradually evolving:
http://www.mazdarotaryclub.com/forums/showthread.php?t=71535&page=4
I have just got a kart chassis which hydro brakes all round, wonder if a kart could turn into a drift kart? Should be quite a bit of adjustment in all the settings and the engine is going to be pretty powerful, what do you guys think? Im planning to have the kart as a drag kart, but I guess setting could be changed to make it drift?
P.S. the wheels have epic dish :rolleyes:
(http://www.kartcomponents.com/images/popups/image084.jpg)
:Dooh, niice egg cups
1300cc busa drift kart:
http://automodified.co.za/untamed-drift-gokarts/
The two things I can see being a problem is the amount of steering lock and the driveline. You ought to be able to get more than enough wheel control to hold slides and it ought not to be too hard to rig up rear brakes for initiations. But karts have limited lock for their size so big angles might be difficult, also if you\'re using a centrifugal clutch then I don\'t think you\'re going to be able to get the power to the back wheels quickly enough to keep them spinning hard and maintain the slide. I may be wrong on that though!
It will be a bike engine, so its geared, will see about lock, will post up what the lock is like at the moment, there are many many settings for the steering on both the rack and the hubs. Its just an idea though :)
Just have an over powered engine in it, it will slide all over the shop easy. Steering on carts isn\'t much as theyre really responsive.
Yeah, I was looking at Gixxerkarts, but would mean that I would need to make the frame longer:
http://www.youtube.com/watch?v=_nQW0jsqv4Y
Seems you can fit a Honda CB600F in the OEM location though:
http://www.youtube.com/watch?v=f8JW1DJmJxk
Probably slightly more stable than this:
http://www.youtube.com/watch?v=tsGQbOzPwyM&feature=mfu_in_order&list=UL
I agree with Will66.
But i think Hayabusa engine is too big. I have seen those done with 600cc engine. And it is big enough. Itl go like grazy. :)
Nice project though ;)
Yeah, trying to keep the engine size down, I am looking at a CR250 dirt bike engine at the moment, those are around 50bhp and easy to mod and repair, although I have just found a cat B Honda CBR600 for about £350, I will need to check the cost of rebuilds etc plus how wide it is as I don\'t want to extend the frame at the moment.
Just drop it in and drift it!!!!
I would go with the 2stroke engine. You can up th HP quite easily with barrel kits, bigger carbs and exhaust.
I tuned my 50cc scooter up before I passed my driving licence so much that it would do 70mph on the flat and 80 down hill!! Had a gear kit in it to stop it pulling wheelie every time I set off and to raise the too speed. So imagine how fast a cart will be with a 250cc 2 stroke, which basically can equate to a 500cc 4stroke.
250 cc Go Kart (http://www.youtube.com/watch?v=Q4nWFJYdhRM)
13.3 1/4 mile at 100 mph. Not bad but with you backside that close to the ground I bet it feels a lot faster.
I used to have a mini and that felt like I was sat on the floor. 30mph felt like 60 and when I did 85mph it felt like warp speed so go knows what a cart will feel like
Just been thinking about the drift or drag cart. Basically you would have to have different sized final gear and different length chains, bigger rear gear will give you higher top end, slower acceleration, smaller will be the opposite.
Big for drag ,small for spinning the wheels up
Quote from: Will66;806277250 cc Go Kart (http://www.youtube.com/watch?v=Q4nWFJYdhRM)
Thats an F1 kart, their 250cc engine is around about 90bhp vs a 50ish bhp 250cc dirtbike engine, the F1 kart engine gets rebuild every race @ around £400 a time.
I think I will stay 2 stroke as its easier and also more compact, the issue being is that a large single cylinder 2 stroke is around about 250cc, multi cylinder engines are usually 4 stroke, I have seen some nice Honda V twins though, that might be compact enough.
As for the final sprocket, yeah I can change them for whatever I want, so I can just change the rear sprocket depending on if I want top end of acceleration, much easier than getting a gearup kit on a scooter engine! What cc was that scooter engine? I know that the record currently for a racing scooter is around 108mph terminal with a 125cc engine with the largest bore up kit to 178bhp, the CVT system is usually the limiting factor though.
50cc with a 70cc kit on it. Big carb. Racing exhaust. Had a racing crank in it too as managed to snap the crank after putting the gear kit in. Never put an air filter on it, just kept the standard air box with foam filter and drilled holes in the side and worked fine.
Installed a tachometer on it to see how high of was revving and I had it off the scale which went to 12,000 rpm!!! Hahahahahahahahahahahahahahahahaha. Just realised that why I love rotaries so much!! The rpms, it\'s all about the rpms!!
RPMs ftw!
It might be a bit large but this gnarly little sucker would do the job! (http://www.youtube.com/watch?v=nOjk9RCzg9Y)
Quote from: Will66;806341RPMs ftw!
It might be a bit large but this gnarly little sucker would do the job! (http://www.youtube.com/watch?v=nOjk9RCzg9Y)
I wish I coudl afford a rotary kart engine, but they are around £3500 used
http://www.youtube.com/watch?v=tKayagHUCw8
My minibike engines rev up to around 12k :)
Im glad you kept the OEM airbox, on a 2 stroke the intake is also tuned due to the reads opening and closing, if you had an open air filter you would lose some of the fuel from the intake charge and it would be forced out back through the carb when the reeds close, which is why those \'boost bottles\' work to smooth out the intake.
i race rotax max karts which are pretty quick ( do average speed of 60 ) round the track but can be geared to do 120. you can get a bore kit for this as well as they are a 125 2 stroke but can bore them to 175 i think <
The rotax max engines are very expensive and cost a lot to rebuild, plus they are direct drive, im going to go with a bike engine as parts a cheaper and im not restricted in what I can do.
With regards to grip, I will be getting the 210mm rears and some decent Dunlop rubber used for the higher power karts. The superkarts get plenty of grip and they are around 90bhp. So I think thats my max power I can go for as any more power it might be an issue with traction.
I was looking at single cylinder engines, but now I have been told I won\'t be allowed on kart tracks I am thinking of upgrading that idea. The inline 4 engines are too wide to fit on the kart in the OEM engine position - well they do fit, but they are unstable and so they have to be mounted behind the driver.
I then got thinking about what other engines might fit and I then came across a possible answer - V twin engines - I don\'t need to worry about how long the engine is, just the width.
I have found the VFR400, VFR600 and VFR1000 engines, need to get specs on the width etc, but I found a complete VFR400 project bike for £250! the engine has around about 60bhp as stock, I will have a look around closer to the time though, still getting ideas, but I think a v twin engine might work. The issue I am coming up with regarding 2 strokes is there aren;t many large capacity single cylinder engines anymore, so it might be easy to go multi cylinder.
Quote from: m1tch;806365I wish I coudl afford a rotary kart engine, but they are around £3500 used
http://www.youtube.com/watch?v=tKayagHUCw8
My minibike engines rev up to around 12k :)
Im glad you kept the OEM airbox, on a 2 stroke the intake is also tuned due to the reads opening and closing, if you had an open air filter you would lose some of the fuel from the intake charge and it would be forced out back through the carb when the reeds close, which is why those \'boost bottles\' work to smooth out the intake.
if i had used a K&N filter i would have just re jetted the carb to compensate for the increased air. i was using a 102 mian jet, which was spot on and very big for a poxy 50cc scooter!
not all 2 strokes have reed valves, aka power valve, the reeds are after the carbs so you wouldnt lose any fuel whatsoever as the fuel wouldnt go backwards through the carb because of the suction the engine is producing from the reflective wave inside the exhaust.
in the moto GP 125cc 2 strokes once the bikes have set of and are full throttle, basically for the whole race, a servo actually holds open the Carbon reeds so that maximum air and fuel gets into the engine for more power, higher speeds.
Im still tempted by a V twin engine like a VTR400, 4 strokes are easier to turbo :D
I have seen youtube video, cart has old Fiat engine,from Fiat127. Dont remember what was it 900cc or 1100cc. I was wondering about their choice. But that thing was fast. :)
Im planning not to mod the OEM frame, I don\'t have any welding skills and need to keep the chassis as OEM as thats how it was designed to be with the correct strength and support etc
Ive been offered a Suzuki SV650 engine - its a 650cc v twin engine.....someone has already mounted it into a kart, sounds epic and seems to drift well!
http://www.youtube.com/watch?v=7JVn13eNDD4
Ya, i think that it would do the job. ;) What i have heard, its a good engine. (in a bike anyways...) :)
Quote from: re japi;807032Ya, i think that it would do the job. ;) What i have heard, its a good engine. (in a bike anyways...) :)
Yeah I have been asking around on a bike forum, its the most common V twin engine so there is a lot of support and parts for it, need to angle the seat slightly though to offset the weight and let it fit lol
Looks like a cool toy, 65 bhp on carbs or 74 bhp on fuel injectors, designed to haul the kind of weight you\'re talking about, dealing with. Plenty of torque and since I\'m guessing you\'ll be running a shorter final drive than the bike would then you\'ll have lots of spin whenever you want. You ought to be able to feint it into drifts nicely or clutch kick it too!
Quote from: Will66;807044Looks like a cool toy, 65 bhp on carbs or 74 bhp on fuel injectors, designed to haul the kind of weight you\'re talking about, dealing with. Plenty of torque and since I\'m guessing you\'ll be running a shorter final drive than the bike would then you\'ll have lots of spin whenever you want. You ought to be able to feint it into drifts nicely or clutch kick it too!
Its the carbed model, but thats 65 as stock with a stock exhaust and restricted airbox :) common mod is to change the cams from the later model into the carb model to give higher lift, apparently the carb model is smoother and the injector model is a bit jerky on the power delivery.
Plan to run a race header and velocity stacks on the carbs so should make a good noise!
I need to sort out the sprockets, using the OEM drive on a bike ie OEM front and rear sprockets on the tiny kart wheels the top speed will be 55mph :rollin
I think the chain pitch is also slightly different, so I am planning on changing the front sprocket to a kart sprocket and then just run a standard larger rear kart sprocket to allow for the correct ratio for the wheel size.
The standard bike apparently runs 12 second 1/4 miles :rolleyes: im glad I have front brakes on this kart chassis lol :2eek
I will probably get the uber cheap kart tyres for drifting, will need some decent tyres for drag racing, the \'normal\' kart tyres are rated to about 100mph before they blow out, will need to get a decent set so might have a drift set and a drag set :)