BIG homemade gasoline buggy (1:4) with 100cc kart engine
04-09-2009, 03:29 AM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
ARGH! I had it in another tab while it was loading but I had my volume full blast! Lol I'm still recovering.
That Buggy ROARS!!!!
That Buggy ROARS!!!!
04-09-2009, 03:58 AM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
The initial engine break-in was quite fun and the first video was about that.
2-stroke engines (as most of you know) require severe amont of extra oil in gasoline for the break-in period. Full-blooded racing engines like this one require even more and you need to run it obscenely rich and try to keep it alive with variable low rpms as I did, the over-rich mixture keeps trying to kill the plug constantly. I had a tachometer attached to the engine and max rpm recorded was 6150. So 10.000rpms to add up
When a 2-stroke engine is leaned out for max performance vs. durability then and only then will they REALLY start screaming. I'm used to these engines and can assure you that YOU HAVENT HEARD NOTHIN' YET
2-stroke engines (as most of you know) require severe amont of extra oil in gasoline for the break-in period. Full-blooded racing engines like this one require even more and you need to run it obscenely rich and try to keep it alive with variable low rpms as I did, the over-rich mixture keeps trying to kill the plug constantly. I had a tachometer attached to the engine and max rpm recorded was 6150. So 10.000rpms to add up
When a 2-stroke engine is leaned out for max performance vs. durability then and only then will they REALLY start screaming. I'm used to these engines and can assure you that YOU HAVENT HEARD NOTHIN' YET
04-09-2009, 02:24 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
JariV, as everyone has stated, that is excellent ingenuity. I can only hope that you break the engine in quick and finish up the car so we can see it go for a spin. Amazing...
04-09-2009, 08:02 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
Jari, have you built any other big RC cars like this or is this the first one?
Can't remember if this was mentioned in the other thread.
Thanks
Can't remember if this was mentioned in the other thread.
Thanks
04-10-2009, 02:35 AM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
I haven't done anything like this size before.
I've played around with 1/8 scale buggies and truggies and naturally 1:1 real cars a lot. Hotrods, road racing cars, drag cars and so on.
One special rc build that I did before this Baja was a Hobao (in the States the brand is OFNA) Hyper ST 1/8 truggy. I modified it and fitted a rare O.S. originally supercharged 20cc (1,2 cu.in.) fourstroke engine. Made custom engine mounts and a clutch myself. That was a fun car but a collector bought it from me.
Here's something about that one:
Driving the Hobao, turn the volume up
http://s5.photobucket.com/albums/y17...t=23092007.flv
I've played around with 1/8 scale buggies and truggies and naturally 1:1 real cars a lot. Hotrods, road racing cars, drag cars and so on.
One special rc build that I did before this Baja was a Hobao (in the States the brand is OFNA) Hyper ST 1/8 truggy. I modified it and fitted a rare O.S. originally supercharged 20cc (1,2 cu.in.) fourstroke engine. Made custom engine mounts and a clutch myself. That was a fun car but a collector bought it from me.
Here's something about that one:
Driving the Hobao, turn the volume up
http://s5.photobucket.com/albums/y17...t=23092007.flv
04-10-2009, 06:35 AM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
Wow, it sound so deep - gotta love the four-srokers. That project must have required so much careful planning for weight distribution...any idea the power the OS engine was putting out?
04-11-2009, 01:31 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
Thanks guys.
Wan6176; it uses a separate portable electric 12V starter.
Da mad maori; No secluded oil in 4-stroke glowfuel engine. Those engines have a feedline from intake to crankcase and utilize glowfuel lubrication.
Wan6176; it uses a separate portable electric 12V starter.
Da mad maori; No secluded oil in 4-stroke glowfuel engine. Those engines have a feedline from intake to crankcase and utilize glowfuel lubrication.
04-11-2009, 04:08 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
hey
damm that is one sweet one off machine cant wait to see the video??
would you be intrested in building me one sometime?? how much would you charge me if you could??
or is that one for sale when ready?
that hobao four stroke is lovely also,four strokes are rare in rc monsters,how come so much smoke?
damm that is one sweet one off machine cant wait to see the video??
would you be intrested in building me one sometime?? how much would you charge me if you could??
or is that one for sale when ready?
that hobao four stroke is lovely also,four strokes are rare in rc monsters,how come so much smoke?
04-11-2009, 10:45 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
Now I'm a little surprised. You are like the tenth person to ask me to make a copy of it.
A word of warning here; only the material that needs to be bought for such buildup will be in the range of 5500 Eur. Plus it takes about 3 months to build. So we would be talking about over 10k. And if one would want for instance real live telemetry or some other extra things in then all that would be additional. So we are talking about prices that would be horrendous for an rc.
A word of warning here; only the material that needs to be bought for such buildup will be in the range of 5500 Eur. Plus it takes about 3 months to build. So we would be talking about over 10k. And if one would want for instance real live telemetry or some other extra things in then all that would be additional. So we are talking about prices that would be horrendous for an rc.
04-13-2009, 09:55 AM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
Awesome projekt......... You are a true craftsman. Do you have pics of the build process?? Is it runing on gocart wheels??
04-13-2009, 12:26 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
Jariv in singapore i got hold on to the tomegawa servo ss050,but didnt ask the price yet told the shop owner reserve for me hehehhe i'll be back for it 
why do you need 2 servo for steering?isnt 1 of the tonegawa servo is powerful enuff to steer the monster tyre?
btw are u using dunlop kt11 or kt 10 on the tyre size? it looks ur using kt10,bt bigand easy got kt11.
i'll be back for it why do you need 2 servo for steering?isnt 1 of the tonegawa servo is powerful enuff to steer the monster tyre?
btw are u using dunlop kt11 or kt 10 on the tyre size? it looks ur using kt10,bt bigand easy got kt11.
04-13-2009, 02:27 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
KT10s are the ones I'm using.
Trust me; even if the PS050 is powerful then when you have a proper geometry in place then one is not enough. For instance the front hub has a lot of things to take into consideration so that bump steer does not happen. Study steering geometries and designs carefully. Normal size car car geometry is way too tame for these. 1/8 buggies are a good starting point. 2WD if you are making a 2WD and 4WD equivalently.
Final engine break in with over-rich mixture.
Trust me; even if the PS050 is powerful then when you have a proper geometry in place then one is not enough. For instance the front hub has a lot of things to take into consideration so that bump steer does not happen. Study steering geometries and designs carefully. Normal size car car geometry is way too tame for these. 1/8 buggies are a good starting point. 2WD if you are making a 2WD and 4WD equivalently.
Final engine break in with over-rich mixture.
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04-13-2009, 07:35 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
[link=http://s5.photobucket.com/albums/y176/JariV/?action=view¤t=Baja009.flv]Final engine break in with over-rich mixture.[/link]
04-13-2009, 09:23 PM
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RE: BIG homemade gasoline buggy (1:4) with 100cc kart engine
Ah! Beautiful! And the sound, even though only a vid, is awesome!
Boy, I cant wait to see that actually running! That thing will totally stomp all other gasser RCs in front of it!
Boy, I cant wait to see that actually running! That thing will totally stomp all other gasser RCs in front of it!
