fox222
Posts: 63
Joined: 3/21/2005
From: Woodstock,
GA, USA
Status: offline
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In a word it’s a missile. This motor is a .21 big block in disguise.
Now for the down side or sides. I bought a RD Logics pipe that was supposed to fit the RS4 and it doesn’t, unless you don’t mind running without the right rear tire. So I bought the HPI header for the rear exhaust motor and it just clears the tire. I was still using the stock black aluminum pipe at this time when the one way started to slip. So I ordered a O.W. from bearing from Boca and so far so good. Then I bought the new shiny HPI pipe and man what difference that made. It jumped through 1st & 2nd gear so fast I wasn’t sure it was shifting a first until I did a ¾ throttle run so I could here the shift. By the way I am running 41 & 45 spur gears with the 18 (purple) & 23 (red) pinions which is the highest 2nd gear you can run (to my knowledge) and a medium first gear. BTW you have to mill or dremel the chassis to get the gears to mesh.
Now I have broken dog bone after dog bone. So I have installed the HPI cvd’s on the axels and after about six hard runs so far they are holding up. BUT the center shafts are another story, in those six hard runs to test the cvd’s I broke 2 rear center shafts and 1 front. Right now I am running the motor rich until I find a fix for the center shafts. But as long as the shafts stay in, it flies.
One more thing, you must run foam tires. I tried some of the high traction rubbers and they just don’t work with this kind of power.
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> HPI Racing >> HPI On-Road >> Stronger drive shafts for RS4 3? 
Stronger drive shafts for RS4 3? - 
