Rex P5 with an 053 pipe,,, for short-medium tracks or places where you need to clear technical, turn in then clear triples, or scoot over a corner burm and shoot a pipe , etc ,etc,....
also JP Mod M2K with 86 pipe,, wicked combo,, crazy powered long stroke motor ,, similiar charactoristics as the above combo,, but about 8-9 minutes on a tank between pits, on a 25-26 second track.....
Long tracks and arse- whooping oomph,,, Rex 421B , 4 head bolt version(new)..... if you go to any larger track 100' + straight with in tight techies,, this motor wont rev-out as you pump the middle to end of the straight-away.... plus it has a wicked scream to it.... Rex not Top , lines of these seems to last in my hands...???
I've run the Rb's ,, and they always impressed me, but lately, (any of the newer version within the last year for production dates), have had an off color to the cranks,, it looks like the metal was changed up on them,, and they wear crazy fast in the rod-pin area on the crank,,, really suck-ee as I smoked 2 of them real close to one another... which i dont understand,, I still have the same P-5 and 421 that I swap depending on the track.... ???
C-5 always good if you hang out in europe,,,,,,, 500' straights,, but not to fun to maintain the clutch if you use a traditional shoe style on it,, maybe an RMV or Werx might make this a more usable motor in the states....
actaully ,, if you think about it,, rb's have had the same porting and internal designs for years,, havent changed a thing,, where the nova lines, have changed since the intro of the ws711'z and other "old timers" motors .. *grin*...
-Wm-
actually ,, if you want a nice racing motor,, look for the old hand done,, and it has to state,, "hand modified" , JP Mod P-5 ..... worth it's weight in gold,, most of the mod motors you get now are machine modded,, which is good for tolerances and what not,, but if you can get a hand-er from one of the old bucks ,,,, worth it........
-Wm-
