Originally Posted by
TXRC8racer
I ran a RB S7 converted to Turbo head and ceramic bearings. This motor had great top end with the JP3 pipe and good run time around 8-8:30 min mark with a 7.5 carb restrictor. And with the B5 I have not got any good exact run times yet but in this last race i was pitting at 7-7:30 to be on the safe side and with the fuel I had left it will go 8:30-9 I believe. The only complaint I had with the RB motor is a little lack of low end power. Which with the new B5 I have tons of low end and to be honest this motor has never seen a WOT the straight aways at the track I run at is only around 60-70ft. So the B5 has never really got to open up at this track. So this motor is a perfect fit for this kind of track. I already told Mike B. to get me another!!
Thanks for the info! Sounds like you are running on a really, really small track! Once get outside to some of the larger ones start playing around with pipes a little bit. I'm still not convinced that the JP3 is a really good fit for the power band on this engine so I think that changing this might help you quite a bit! Either way though for right now on the type of tracks that you are running on it sounds like it works just fine, so you might as well keep running it lol!
Regards,
Ron