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-   -   traxxas vs hpi engines (http://www.rcuniverse.com/forum/rc-monster-trucks-160/3596562-traxxas-vs-hpi-engines.html)

merlinx76 11-28-2005 04:48 PM

traxxas vs hpi engines
 
I'm trying to decide between a Savage SS4.6 , a T-Maxx and a Revo. What I'd like to know is how do the engines compare? I would imagine the Savage has more power. Are all 3 engines ball-bearing? Also, whats the difference between the TRX 2.5 and the TRX 2.5R?

mayhem272 11-28-2005 05:12 PM

RE: traxxas vs hpi engines
 
um dude every engine is ball bearing they kinda have to be
well i have a jato (wich has a 2.5) and in my opinion i dont like it. it stalls alot (might just be me)
im gettin it rebuilt soon though
i have no expierence with hpi or savages
id say they are good though
if u were to get a revo/tmaxx when the engine is done for get a rb tm 323 (a .23 motor with a motor mount specialy or a tmaxx or revo) i hear those motors are great and crazy fast
im lookin into the Cen Nemesis 7.7 or the Team Losi LST2

ScMc 11-28-2005 05:15 PM

RE: traxxas vs hpi engines
 
As far as engines go, the savage engine will have the most power and be the most reliable out of those three trucks.

DaveG55 11-28-2005 05:31 PM

RE: traxxas vs hpi engines
 
Let's see, the HPI 4.6 is a big block motor (.28 I think) and the 2.5(r) is a small block motor (.15).
By all reports the 4.6 is a good motor.
The 2.5(r) is a good motor with somewhat of a bad rep. It can be a bit of a bear to tune but when tuned properly it really is a good running, very powerful .15 engine. Unfortunatly it is often compared to big block motors and that's not really a fair compasison. Of course if you put a big block in a truck designed for a small block the performance difference will be dramatic.
I believe that the only difference in the newest versions of the 2.5 and the 2.5r is the head. The 2.5 is a cast alum head and the 2.5r has a machined head. The machined head should provide a slight improvement in cooling.


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