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Old 03-04-2003, 07:14 PM   #2581
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Default Strange understeer problem

I was running my car today(both diffs are very tight--turn any wheel & the other 3 turn the same direction)and it would spin out at high speed(1/2 throttle to full throttle) This is on a fairly dusty surface with radials. I'm only running a 13 turn, so it's not 'that' powerful. It's almost as if the diffs work at low speed, then the front loosens at high speed, as if it suddenly turns RWD with torque bias to one side.
I'm running the same tires all around andgreen front/orange rear on the springs. The understeer is so bad it's pretty much undrivable.


1.Should I just lock out both the diffs completely? Or just lock the front and loosen the rear?

I may try mmoving more weight to the front, but understeer is pronounced that I doubt it's anything that simple
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Old 03-04-2003, 08:58 PM   #2582
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Try Tighting your diff all the way let 1/4 to 1/2 out. it sounds like something rubbing. check your bearing one might be froozen. and i think your gearing is wrong your getting to much accel so try a diffrent gearing go 1-2 tooth up .hopefully that helps
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Old 03-04-2003, 11:36 PM   #2583
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Default gearing

I'm running 23/78 so it should be good. The ball bearing's sound like a probable cause, since it is more pronounced at high speed. I just need to find bearing info(can I buy a full set anywhere?) If not, What are the wheel and diff bearing sizes(I got thecar used)
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Old 03-05-2003, 01:54 AM   #2584
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Default bearing sizes

the diff bearings are 10mm internal X 15mm external X 4mm wide

axle bearings are 6mm internal X 10mm external X 3mm wide

and the layshaft and steering arm bearings are 4mm internal X 8mm external X 3mm wide
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Old 03-05-2003, 12:24 PM   #2585
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Default thanks!

just got all the axle and diff bearings for $35 from tower. Hopefullt that will fix my problem. I'll also disassemble my diffs and relube them. I was planning on getting a direct drive Delphi Indy and running it with a 13T, but after I played around with loosening the front diff and running RWD in my Yoke, I couldn't imagine running something that much lighter on anything other than the best prepared of surfaces.
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Old 03-05-2003, 01:09 PM   #2586
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Hi everybody the MRTC-SD will cost about 39,000 yen or whatevre
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Old 03-05-2003, 06:10 PM   #2587
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Default MR-4TC SSG Conversion Kit and Chassis

Anyone interested in the SSG Conversion kit and Chassis? I'm willing to sell them for $150 shipped (in the US). They're brand new in the package. I bought them in anticipation I would buy an MR-4TC SP2. I ended up with a Losi XXX-S G+, but still wanted a MR-4 and they've been sitting here and now I'm in need of money. Can anyone help me out?

Sorry the picture isn't crisp as I'd like. I only have a 1 megapixel fossil of a digital camera.

-Leon
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Old 03-05-2003, 06:22 PM   #2588
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I've not long aquired a SP and was after a basic setup for Asphelt on foams or rubbers. Basically something that I can work on from there.

Also can anyone point me to a Setup guide for the SP. I know there is the XXX Main guide but I'm after something more specific to the Yokomo.
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Old 03-05-2003, 07:59 PM   #2589
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Check out my website for many setups for asphalt and carpet.
www.mo-net.ws
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Old 03-06-2003, 12:55 PM   #2590
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I am picking up a used MR4 and plan on a weekend wrench session. The previous owner could not keep the front end from chattering coming out of turns and has given up. Im not sure what to look for or what his set-up was like, probably real close to stock. Has anyone else had this kind of problem? Any recommendations as to what parts to upgrade?
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Old 03-06-2003, 02:06 PM   #2591
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Just pust some thick grease, like associated black grease, on the drive pins in the outdrive cups. That should pretty much take care of the problem.
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Old 03-07-2003, 08:58 PM   #2592
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Chris Toso's car..Sweet..
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Old 03-07-2003, 09:36 PM   #2593
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I thought he ran for Orion? that looks an awful lot like a Ti motor in his car
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Old 03-08-2003, 02:57 PM   #2594
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Tosolini runs Fantom/SMC if I'm not mistaken
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Old 03-08-2003, 04:50 PM   #2595
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He ran fantom/SMC about a year ago and this year he signed with Orion. If that is indeed his car with the Ti can maybe he switched back. but that still doesn't explain the Peak battery!
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