Looking to purchase a 4 port Nova & have narrowed it down to either the BTT4 or the Keep Off. By my uneducated eye the only difference I see is the Keep Off has the rear ceramic bearing to the BTT4 rear steel bearing. Is there any other differences? Is the low end power more controllable compared to a P5 or Elite 5?
Thank you for your responses.

I would get the new one Mantra it is a awesome engine fast lots of tourq low fuel consomtion

Novarossi Roma .25 in truggy is just incredible!!! Used the EBIS oil bath break in method and after 3 idle tanks engine was fully broke in, first race with it today and it was beautiful, idles like a dream.

Geared up one tooth on clutch bell to tame the torque and increase top end and it was pulling every other engine on the straights. Torque is tremendous too, it just pops a heavy truck over short run up jumps like it was nothing.

What up fellas, Quick question. Does anyone have time on a MANTRA? I ran a BTTA about a year ago, loved it......then I switched to SAMURAI V2, loved it but it was short lived 5 maybe 6 gallons vs my nova 10 gals.......just ordered a MANTRA , what should I expect? Hoping it's not a light switch motor on bottom end......

im not able to comment on the mantra as i dont have one yet, im sure it will be a cracking engine. are you able to say why your samurai only lasted 5-6 gallons? did it lose pinch or something else?

Maybe like a Bonito, perhaps Houston can chime in.

Lost pinch , yesterday would only stay running with the ignitor attached! Even at full throttle if I pull off the ignitor motor would still die! I put in a new P3 plug and still same symptoms ! Run good until ignitor was detached ........also had 2 ghost flameouts last week during warmup for my main

ahh what a bummer, i recently bought one when during the black friday sales. i run both OS and Novarossi motors and can honestly say ive never felt disadvantaged running a Nova, quite the opposite actually.

I think lots of people sleep on Novarossi because the prices are lower than OS and they think that means the quality or speed is also low, definitely not the case.

Can I get some feedback on the rolling?

Got me rethinking things now.... That Mito Moots ran was just as fast as the Samurai.

Be careful of the MITO tho, myself and a handful of others had major prob out of that engine, expensive rear bearing didn't last thru breakin!

I’d have to run the LS5 if I went back to Nova. It’s that or Samurai for me.

I have been running the Mantra for a little while and I love it. It has lasted longer than my Mitos. I have about 4 gallons on one, and if I can get back to getting 8-10 gallons on my Nova engines then the Mantra will be the best Nova engine I've ever used.

Great powerband and incredible mileage. Easy 10 minute pits and can get 11+ minutes even at tracks where you generally get bad mileage. Give it a try. I don't think you'll be disappointed.

This is just a re branded P5 correct? At this point it's my only Nova option due to sponsors. I loved my P5 but was down on power but 1evo RRR Driver and I drove one this weekend with great power. Maybe I just had a bad one or it wasn't tuned correctly. How are the Nova's to tune compared to OS engines?

What pipe/header is good with the Mantra? I have the 41021/9901 combination that I would like to use. Also, is anyone running the Mantra on 30% fuel? The website says 25%.