So is that 528xr a pretty easy motor to tune or is it going to be finicky? What about a pipe? There isn't a limitation to the motor size in the unlimited monster truck class is there? I didn't think there is, "Unlimited", however I'm not 100% sure. Thanks for the help.
My RB TM928 is very easy to tune. It has tons of power. Way more than any .21 I have had in a buggy. Unlimited trucks were in mind when the 528x and RB 928 were created. And there is not engine limit on Unlimited truck as of right now. Jammin won the roar nat with a 528 and Matt Gosh was running a .32 last time I saw his truck.
A modded P5 would be plenty, but if you can be smooth with your throttle finger, a 528XR is real nice. The downside is that it is harder on your clutch, and is a gas hog. A have a EB 528XR and love it.
I'm running a JP2 on my 528XR. I would stay away from the Collari .30 and .32. That carb is a piece of crap. If you can afford it, I would stay with a high end engine. It is worth every penny for all the reasons.
Is 30% a must for this engine or is 20% ok? I run 20% now and keep up against all the others running 30%. I just wasn't sure whether this was necessary seeing as this is a pretty high end motor. Thanks for all the info, it has really been helpful.