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-   -   NovaRossi .21 Plus 21-5 review (https://www.rctech.net/forum/nitro-off-road/110390-novarossi-21-plus-21-5-review.html)

rczonecentral 04-16-2006 08:27 PM

NovaRossi .21 Plus 21-5 review
I use to use the NovaRossi .21 P5 engines and moved to the newer .21 P5X engines. Honestly have to say i liked the longer life reliability of the P5 better then the new P5X. Anyway, I installed a newer NovaRossi .21 Plus 21-5 into my Truggy and have to say I am really impressed.
It seems the newer NovaRossi .21 Plus 21-5 motor has more low end and more top end. This engine starts up every single time and just purrs at idle and then screams when running. My usual temp is only around 210 too!! I installed this on my HPI Hellfire but I think I will also install one into my Mugen MBX-5 buggy since my P5X wore out recently.

Any other racers tried this NovaRossi .21 Plus 21-5 motor and have comments?

Ryu Goh 04-17-2006 01:40 AM

i owned one.
honestly, i dont think there is any great difference from P5.
In fact, i feel that P5T is more powerful.

just my opinion.

ProudSavageOwnr 04-17-2006 02:19 AM

kool man....how much are these things worth?

jtkc2001 04-17-2006 06:35 PM

You do realize the P5T is a turbo engine and the Plus 21-5 is standard, but you can get it in turbo setup too.

RCRacing.com.au 06-25-2006 05:48 AM

Novarossi Plus 21-5 & Plus 21-5T
Hi Guys,

I've just ordered the Plus 21-5T Turbo version with the reverse carby as i like the look of the specs on it.
Some guys have told me they heard of some people having trouble with the rear bearings but it's only speculation and i'd love to get more facts rather than fiction.
If anyone has had a first had experience with problems arrising with the rear bearing please let me know.
I can't imagine that Novarossi would release a motor that is likely to have problems as they still have the best reputation in the world.
I did have a Rex P5T and was very impressed with the powerband and torque of this motor but i hope the Plus 21-5T is better again.

1armed1 06-25-2006 07:04 AM

The Plus 5 is a very good motor, strong bottom with a linear pull all the way to the screaming top end.

On the rear bearing, just make sure you give it plenty of break in time and lots of lubrication(running rich)
The bearing issues are coming from guys revving the engine out to early in the break in process.

When I sold my complete scale set up due to $$$ issues my Plus 5 had 3 gallons on it, was still VERY tight and Started first time every time, idled nicely and ran extremely strong.
The guy I sold it to now has another 2 gallons through it and said it is as strong and reliable as the day he got it from me.

RCRacing.com.au 06-25-2006 01:43 PM

Plus21 5
Thanks Dayton,

That was what i thought.
Most guys that have problems usually cause them by themselves.
I know i have with other motors when i stuffed up and caused the motor to have problems.
Besides Novarossi have been building these things for how long now?
They are still the best by far.
How does the R5 Conrod hold out?
Did you replace it after Run In?
Some guys say you should and on the Axe Rossi site they say the same.
I have a friend with a FX21B5N and he reckons he has put nearly 60 litres of fuel through it and only changed the bearing recently but never worried about the Rod.

1armed1 06-26-2006 03:49 AM

If you properly break in the engine the rod should be good untill the 5 or 6 gallon mark.
Just check it regularly and replace when needed.
I have been told by many guys that they changed there connecting rod a 6 gallons and are up to 12 and 13 gallons and still running strong.


777man 06-26-2006 06:48 AM

promugenman on the Australian forum has two MBX-5 prospecs with the P5 in one and the P5 plus in the other. From what he has told me he seams very happy with both but the plus is a stronger engine. Might be worth a PM if you want some more detailed info.

RCRacing.com.au 07-17-2006 05:20 AM

Well guys i'm still waiting on my Plus 21-5T from Dinball.
They have totally stuffed me around as they listed an engine they didn't have in stock and wouldn't answer 6 emails in over 2 weeks.
I am now waiting to get a refund from paypal.
I can strongly recommend not to buy from Dinball or RC-Mart as they are useless and have done the same thing before and sold items they don't have in stock.
In the meantime i found a Plus 21-7BT which i bought but i'm not sure about it as i can't find any info.
Would anyone know anything about them?
I would guess the Plus 21-7BT would have a stronger top end for bigger tracks which won't suit me but i couldn't find a Plus 21-5T for the right price.
Sounds silly i know but i really wanted one of these Plus 21's :rolleyes: :blush:

Berkky 07-17-2006 05:38 AM

after reading the above post, i just went on rcmarts website and bought somthing hehe :D

NP-1 07-17-2006 01:30 PM

Thats odd...Dinball is usually reliable for some hard to find parts.

I purchase form Amainhobbies, they are quick, easy to use, and ship fast. They also have some nice discount codes on some items.

Back on topic, I have a Hot Mod PLus 21-5 in a MBX-5 and it hauls ass. Most people use them in a truggy, and in a buggy, it has insane bottom end nut. I ran at the track yesterday and beat every buggy/truggy out of turns in practice...its insane :sneaky:.

RCRacing.com.au 07-17-2006 03:06 PM

Plus 21
Hey guys i found this link to the Plus 21-7BT last night if you are interested:
It looks like a 5T on steroids.
What do they mean by a grinded thread on the crank?
NP-1 sounds great about your PLus 21-5T.
I can't wait to get mine and put it in my Buggy.
I have an LSK that i've just run in which i will probably put into my truggy.

Sure is strange for Dinball as i have bought stuff from them before and they were good but the last 2 times the stuffed me around in the same way.
AMain Hobbies however are the fastest and best service along with Carolinas RC.
I usually get my parcels within 7-9 days from these 2 guys but not Dinball.
Anyway lets stoke up the Plus 21's i can't wait :nod: :lol:

DRKWNG 07-17-2006 03:30 PM

I bought one of the first 21 Plus 5's Nitrohouse got in stock. I had a regular P5 with 9 gallons on it then I had two modded P5X's with around 8 on both of those. I got less than two gallons on my Plus 5 when you could hear the crome was flaking on the rear bearing. I quit running it and am currently waiting for TKO to come out with the ceramics that fit it. It still has plenty of pinch left because I noticed the problem right away and quit running it. I Break all my engine's in with the heat cycle method and it's worked great so far. I heard the problem was with a very small number of the first batch because the bearing manufacturer made a mistake. I bought a P5X at the same time I got the Plus 5 and had the exact same problem, swapped the bearings and it's fine. I know several people who have bought them recently and they scream with no problems.

NP-1 07-17-2006 03:31 PM

Never seen the Plus 21-7, but the grinded crank or whatever is the indentions towards the back of the crank.

I hope you get your mill soon, I love mine, and its great for racing on large and small track.

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