Hopups
 

So what are the main hop ups to get if you want your ride race ready? And what changes have to be made in order to switch to a rear exhaust engine?

You might want to visit the forum over at HPI Europe

http://forum.hpi-europe.com/?lang=en

The old RS4-3 threads seem to have fallen off on this board.

The rs4-3ss is a very good car . Once it has been modded(lots of $$$), it can race with any car out there. One thing I have noticed with a lot of the "pro" car owners is that over half of them have no idea how to set them up properly. Ask them what roll center is and they have no clue. Once you have a good suspension set up properly, you can make ANY car much better round the track.
Nearly every driver at the track we are planning to race at next spring has bashed the rs4-3ss as crap and not good for racing. Next year I hope to prove them wrong and not because I think the rs4-3ss is a better car but that I know how to make my race car faster than anyone else on the track. Is this not the real essence of racing!!! Serpents,Mugen, NTC3, R40 are all great cars
but making my car faster than them is a world of difference.

even though the rs4 rtr 3 is based of a truck it has its benifits. many of the my hop ups will fit the rs4 3.

hop ups
 

the rear universal propeller shaft is the BEST upgrade you can ever invest. When you install a high end engine, the stock shafts break easily. I broke at least 9 pcs and had to install the part from hot bodies. (the front univ front shaft, by the way, is included on the package)

Re: Hopups
 

the only things needed to install the rear exhaust engine:
left side headers, non-pullstart engine mount, that's it.

mine's rear exhaust already with its 12XS engine 1.+ hp.

rd logics now has a one piece pipe for rear exhaust engines in rs4 3's

The people who knock this car need to get real.

The car is GREAT for getting into racing. here are some pics of mine:

http://clegg.procooling.com/rc/New/HPI6.jpg
http://clegg.procooling.com/rc/New/rc2.jpg
http://clegg.procooling.com/rc/align.jpg

Its a nicely modded car. The pics arent up to date. it also has the super shock set and the CF shock towers now. (because it runs the Proceed 1/8th scale springs they were so strong that they would warp the shock towers on compression before. I also replaced the rear hubs with the auminum ones from GPM because the plastic ones were the weak point on the car for breaking. Running 2 deg toe in on the rear.

Its sporting a full wolfpack radicals chasiss, steering, and 2 speed diff that is VERY similar to the one used in the NTC3 and the Kyosho FW-05R. The 2 speed is the BIGGEST improvement you can make. The finger type 2 speed is pointless crap, since it is very random with its engagement and as teh hub heats up in a run the engagement changes. The Wolfpack 2 speed is very tuneable and dead relaible.

I raced that car all last summer in that trim. Its fast, pretty durrable and can keep up with an NTC3. Infact the fiber brake disk is better at predictable and consistent braking than any of the small steel disk ones I have used on other cars.

Also replace the input shaft/bevel pinion into the diff cases with the hardened one made for the MT, it removes lots of lash and also makes the diff bevel gears last a full season.

I am actually pondering selling this car off now since I now have a Kyosho FW-05RR (R upgraded to an RR) to run next year since I am getting better at racing and want something a bit more bread for it.

But these HPI cars are FAST and can be very nimble of you set themup right, the biggest issue is finding configs for more than one person on one track.

Edit: Also my car was lighter than a TC3 with teh same engine. So for those who call teh car a tank or a truck, its also a very light truck ;)

if you want to see or get more info on my RS4 its posted here:

http://forums.procooling.com/vbb/showthread.php?t=9421 along with a bunch more pics.

is that the hpi engine?

Yeh, its the .12XS a Fine plant :) not really anything special but a very nice plant. I am looking at a new STS plant (STS makes the HPI plant) for my Kyosho next summer :)

i still need the wpr tranny so i think i may get the os 18 cv-rx so save some cash. i don't race but they just paved many new roads in my area( including the one i live on) so thats why i got this car. though i got it for 100 ad with many of the needed hop ups.

racing chassis
aluminum center transmition mount
hpi 2 speed
carbon fiber radio tray

i just put hd out drive, ring and pinion gears in the rear. i also filled the rear diff with solder to make it a posi. drives how i want it to. its easy to take off now and its not anymore uncontrolable from have it be a posi.

you wan the rear to diff, if you have too much lock up in the rear it will over steer VERY easily.

idk it felt fine when i was mobbing around my culdesac. i might put the old diff in once i get a set of new tires. though os 18 is first.

3rd place
 

got third place only last night. Was running strong on the first and the fail safe engaged (the bat was low). I forgot to charge the bat i used in teh qualifying rounds. Had to change bats within the race! Gosh.

In the third qualifying , the pin of the hot bodies rear propeller shaft loosened up and so i was running on front one way wheels only