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Old 06-17-2009, 07:28 AM   #1
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Default mugen mrx4x 3 speed

hello all , i have modify mugen mrx4x 2 speed to 3 speed
gear 1 : 48t - 17t
gear 2 : 45t - 20t
gear 3 : 42t - 23t
very fast

engine mega sx 21 evo 5 have modify caburator 9mm to 11 mm, use with pipe skyline
Attached Thumbnails
mugen mrx4x 3 speed-picture-001.jpg   mugen mrx4x 3 speed-picture-002.jpg   mugen mrx4x 3 speed-picture-007.jpg   mugen mrx4x 3 speed-picture-009.jpg   mugen mrx4x 3 speed-picture-010.jpg  

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Old 06-17-2009, 07:37 AM   #2
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Originally Posted by cuongmobilphone View Post
hello all , i have modify mugen mrx4x 2 speed to 3 speed
gear 1 : 48t - 17t
gear 2 : 45t - 20t
gear 3 : 42t - 23t
very fast

engine mega sx 21 evo 5 have modify caburator 9mm to 11 mm, use with pipe skyline
.............I bet the car is really fast on the topend. The 3 speed should give you the advantage on a large track. Are you going to sell this setup as a conversion kit?? I would be interested in buying one.
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Old 06-17-2009, 07:59 AM   #3
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yes i sell converkit inclued :
shaft 3-speed (cnc) ; 3 speed gear 48-45 and 43 ; 3 gear pinon metal 17-20 and 23;clutch bell alu LC ; adaptor 3 speed Lc;drive -flange alu wuth OWB LC, oneway bearing

pls let me know your model onroad you want modify to 3 speed i will caculator price and cnc same with model you want upgard to 3 speed thanks.

http://www.clbmodify.com/showthread.php?tid=694
this link buggy ocm 2 engine and cen 7.7 two engine
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Old 06-17-2009, 08:46 AM   #4
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I would recommend a 16 tooth first gear. Should give a lot more snap.
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Old 06-17-2009, 09:58 AM   #5
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hi thanks sir reply , i have choose 17 with frist gear because engine have snap good, orginal for mugen is 49-17 , serpent 48-16,if need i can resize
16-19-22, i think not fast because my engine snap very cool
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Old 06-17-2009, 04:39 PM   #6
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Originally Posted by cuongmobilphone View Post
yes i sell converkit inclued :
shaft 3-speed (cnc) ; 3 speed gear 48-45 and 43 ; 3 gear pinon metal 17-20 and 23;clutch bell alu LC ; adaptor 3 speed Lc;drive -flange alu wuth OWB LC, oneway bearing

pls let me know your model onroad you want modify to 3 speed i will caculator price and cnc same with model you want upgard to 3 speed thanks.

http://www.clbmodify.com/showthread.php?tid=694
this link buggy ocm 2 engine and cen 7.7 two engine
.......The first car I would like to put the conversion kit on is my HPI R-40. And my V1RRR.They are both 1/10 scale can you make this conversion for a 1/10 scale car??
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Old 06-17-2009, 04:42 PM   #7
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interesting, I don't have a 1/8th car but that does look interesting.

Have you done any stress tests on the centax or engine?
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Old 06-17-2009, 06:37 PM   #8
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Originally Posted by cuongmobilphone View Post
hi thanks sir reply , i have choose 17 with frist gear because engine have snap good, orginal for mugen is 49-17 , serpent 48-16,if need i can resize
16-19-22, i think not fast because my engine snap very cool
16-19-22 sounds dead on for the kind of tracks I have in mind that this might work well on. A 16-50 is pretty much my standard first gear on a Mugen.
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Old 06-17-2009, 06:59 PM   #9
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Hi, I race an MRX4X and am going to the worlds in Lostello. Being that it is such a big track I might be interested in just buying the 23t 2nd gear. Do you sell them separately to the 3 speed. And is it the same diameter as the current gears. Thanks
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Old 06-17-2009, 07:54 PM   #10
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hi wingracer , thanks reply i will test with 16 tooth first gear , today i will post video clip, i will test with 16-19-22 vs 47-44, i have change 17-18-20 vs 48-46-44

hi nitrohead5300 : i can help you upgard hpi-r40 and v-onerrr to 3 speeh but let me now tooth gear for vone and hpi 1m or 0.8m ?

hi mugen NZ : you want upgard gear on clutch to 23 t ? if you want i can , your clutch is centax ? i have use clutch centax
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Old 06-17-2009, 08:32 PM   #11
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Very nice setup you have there. Is this conversion IFMAR and ROAR legal?
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Old 06-18-2009, 11:38 AM   #12
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Originally Posted by cuongmobilphone View Post
hi wingracer , thanks reply i will test with 16 tooth first gear , today i will post video clip, i will test with 16-19-22 vs 47-44, i have change 17-18-20 vs 48-46-44

hi nitrohead5300 : i can help you upgard hpi-r40 and v-onerrr to 3 speeh but let me now tooth gear for vone and hpi 1m or 0.8m ?

hi mugen NZ : you want upgard gear on clutch to 23 t ? if you want i can , your clutch is centax ? i have use clutch centax
.............On the HPI R-40 it is the stock gearing not the optional 0.8 and I was thinking maybe 48,45and 42 tooth for the spurs and 15, 18, 21 for the pinions. looks like the V1RRR uses the 0.8 gears so let me know what kind of ratios you can come up with for the V1rrr.
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Old 06-18-2009, 12:10 PM   #13
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Quote:
Originally Posted by Wanabrc View Post
Very nice setup you have there. Is this conversion IFMAR and ROAR legal?
Back in the 90's BMT had a 3 speed gearbox and by then it was for sure legal. If you take a search on ebay I think you will find the parts or else Mantua models still seems to support the older BMT models. Basicly the 3rd speed is just a 2nd speed with other gearing, the setup of the gearbox is the same as the current HPI RS4-3 uses.

An 42/23 in 3rd gear is not you wanna use on a track, it is to heavy.

Other models 3-spped with a direct fit is the from a Shumacher fusion, even the ratio's are more close to the mugen ratio's.
And another one which can work is from a Kyosho Giga Cruizer.
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Old 06-18-2009, 12:16 PM   #14
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Will it work on 1/10 Touring!
thank you
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Old 06-18-2009, 12:33 PM   #15
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Have there been any issues with centrifical forces causing the extra long 3spd assembly to wobble?
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