hpi rs4

[Revorunner]

Hi I have an original rs4 with the .15 and a single speed tranny is it possable to make it a two speed and upgrade to the 3.0 engine?

 

[ohmygahitscoby]

Yes you can upgrade to the 3.0 engine. I wouldn't recommend upgrading to an HPI engine again though. I would say try out an OS engine. They make great engines for a great price.

I am not familiar with the original RS4 layout, but if it has a layout similar to the newer RS4's with two speeds, then chances are you can upgrade to it. It may take more than changing the spur gear though.

 

[Revorunner]

It's the same chassis as the new rs4 it's just a single speed

 

[ohmygahitscoby]

You may be able to by buying all the transmission parts for the 2-speed. Let us know how it goes.

 

[Revorunner]

I'll be sure to let you know and ill include pics

 

[zach_man19]

dude buy the 3.0 engine, it stays cool better and dont use that crappy os engine, god wish people give up on them

 

[monsterman]

Hpi 3.0 these little motors have balls!