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Old 05-26-2004, 01:06 AM   #1
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Default Novarossi 321p

Hi there,

Has anybody heard of Novarossi 321p. How is it compare to 421p and what is the diff in performance.
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Old 05-26-2004, 01:56 AM   #2
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Default Re: Novarossi 321p

Quote:
Originally posted by mrx
Hi there,

Has anybody heard of Novarossi 321p. How is it compare to 421p and what is the diff in performance.
Are you sure it is not a typo?
Any picture?
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Old 05-26-2004, 03:54 AM   #3
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Here in spain, only rex at the moment is offering the 321P version, is exactly the same architecture as 421P, the only difference is the material, ABC instead of AAC (421P).

Sold for those drivers who prefer a stronger and log lasting engine despite a bit less performance than 421P.
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Old 05-26-2004, 06:16 AM   #4
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had problems with aac 421P ended production and replaced existing inventory to abc standard and renamed 321p. Lousy product support from novarossi and sucks to have 421p.All support for 421p will be abc.
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Old 05-26-2004, 10:58 AM   #5
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Default Re Novarossi 321p

I haven't got this engine and never seen it before in the state, actually is one of my friend who told me about this from asia coz i'm going to get another engine for mrx3 but haven't try aac yet. will 321p show up in the state? heard some bad thing about aac guess i'll stick to the old abc type, any suggestion of engine to have? thanks in advance.
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Old 05-27-2004, 01:53 AM   #6
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I'm still using JPnovaWC, REx WC mario and NOVA WC mario's, excellent engines and very strong, they are well tested by good drivers worlwide in many events. Maybe less performance than new AAC engines, but far away much stronger. Depends on what you expect from an engine. the 2 latest nats here box tables plenty of destroyed novamax AAC, novas AAC and Jp FXs. all JP team drivers here switched to jp kangaroos.

They are much delicate to heat it up and very important not to overheat them,although the performance is a bit better at the bottom.

I had the same doubt as you last week and decided other mario modified kangaroo. I prefer to spend my money in something really well tested not only by factory drivers but by private drivers and friends who can give me objective impressions and DURABILITY.

BEST REGARDS
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Old 05-27-2004, 10:57 PM   #7
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Default Mario modified

Where can i get those engines you have mention like Mario modify, do you have their website or online hobby shop that carry those kind of high end engines? thanks in advance.
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Old 05-28-2004, 03:08 AM   #8
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mrx i dont know where do you live ( USA ??) Here in spain i buy them direclty to the importer coz i know them long time ago and get them directly. Not all de nova-rex-top importers sell mario modified versions, depends of each retailer. Here is very easy to pick a rex mario modified, but nort so easy with a nova only a few nova mario modified were imported in spain (more or less 10 units) i was able to get one and in the bottom are much more brilliant than the stocker, and at the top end only a bit better.

Your choice depends on your skill level with the radio, maybe a nova kangaroo stocker is enough or maybe not.

If you want the best stocker get an RB C5.

If you need a beast get a JP nova WC or the FX (ABC!!!!!)

If you want more than the stock WC , save some dollars and have good durability pick a nova mario.

regards
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Old 05-28-2004, 04:39 AM   #9
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Default 421p

I have the rex 421p m.rossi tune aac and the engine runs fine. I have about 15 tanks thur it. Since i drag race how long should i expect engine to last. What will be some of the signs of the engine wearing out. Also can i change p/s to abc? I feel like i just wasted my money. What would be an equal replacement?
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Old 05-28-2004, 07:24 AM   #10
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hi.

You didn┤t waste money at all, you have one of the fastest engine at the moment.

The thing is while an ABC accepts quite well overheating it or heat it quickly before a start, an AAc dont. The performance of AAC is higher.

You should n-e-v-e-r race it over 100║, 90║c is its recommended temp.

You should also heat it very slowly, take several laps runing it slow and not full throttle all the straight, do it in 2 o 3 acceleratoin, until it gets well saturated.

I always change conrod each gallon, if the engine is old you can use them much more verifying the play with the crankshaft.

Just change the 3 or 4 first conrod each gallon or gallon and a half.

And review the ball bearings after the first two gallons.

Also check the wear in the crankshaf pin, and never rebuild with a new p/s an engine if the bearings and crankcase is worn out.

When rebuilding if you do so (i never do), You can use the ABC p/s from de 321P. Not sure if the RACEWC will fit, use the 321p better.
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Old 05-28-2004, 10:35 AM   #11
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Default Re: Re Novarossi 321p

Quote:
Originally posted by mrx
I haven't got this engine and never seen it before in the state, actually is one of my friend who told me about this from asia coz i'm going to get another engine for mrx3 but haven't try aac yet. will 321p show up in the state? heard some bad thing about aac guess i'll stick to the old abc type, any suggestion of engine to have? thanks in advance.
Hi mrx,

The 321P is actually out in the market already here is the U.S.
And as it was previously mentioned, it is the ABC format of the
421P.

I personally am using the M. Rossi REX 421P version at the
moment and I must say that I have never liked a motor more
than how much I like this one. The "feel" of the Bottom end is
tremendous and it pulls like a Bull on the straight ! Yet the
delivery of horse power thru its Power Band is nothing less than
Smooth !

I will agree though that it is much sensitive to heat temperature.
Four of us are using this motor and we have found that it runs its
optimum at 215 to 225. And I think because of this sensitivity,
people have had different results from this motor. But fortunately,
so far so good on this motor for me. I have had 1 gallon and a
half thru mine and it still runs like a charm.

Proper maintenance, break in and usage is a big key to
performance and longetivity of whatever motor. So I would
recommend either the 321P or the 421P as a new motor for you
to get for your MRX3.

If you cant find one of these motors anywhere, I would be more
than happy to refer a place to you.

Hope this helps...
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Old 05-28-2004, 10:51 AM   #12
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Default 321P

hi Roni,

where to get the 321p, as fas as i know the 421p AAC cost much higer than the 321p, right ? the M rossi in my country only have the kangaro but do not have the 321p....thxs
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Old 05-28-2004, 12:24 PM   #13
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Default Re: 321P

Quote:
Originally posted by speedy100
hi Roni,

where to get the 321p, as fas as i know the 421p AAC cost much higer than the 321p, right ? the M rossi in my country only have the kangaro but do not have the 321p....thxs
Hi speedy100,

I got this 421P thru RJV Racing Products. They are the U.S.
distributor for the Rex Line and you may contact them thru
their web :

www.rjvracingproducts.com

They should be able to tell you the nearest place for people
to get a hold of these motors depending on the preferred
location. I was told they should have the new 321Ps in and
available too.

I am not sure about the exact pricing difference but I would
anticipate the AAC Format Motor being a bit more than the ABC...
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Old 05-28-2004, 12:55 PM   #14
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Default Re: 421p

Quote:
Originally posted by kpierre
I have the rex 421p m.rossi tune aac and the engine runs fine. I have about 15 tanks thur it. Since i drag race how long should i expect engine to last. What will be some of the signs of the engine wearing out. Also can i change p/s to abc? I feel like i just wasted my money. What would be an equal replacement?
Hi kpierre,

Just like what A-Rass said, no worries about you wasting your
money on a 421P... It's a good motor.

On an ideal environment, signs of wearing down is when the
motor looses power. And the general reaction of people when
this happens is to keep leaning it out in order to keep up the
power. And ofcourse, by doing so, it reaches a point when it will
just blow up. Another sign is that the motor is getting harder to
tune and wont keep a good steady idle.

Another sign, which I do not believe applies to the AAC motors,
is the feel of loss of compression when turning the flywheel over
(even when its cold and has a glow plug on it). I say this about
the AAC because my 421P felt like it had almost no compression
since about the 8th or 9th tank of fuel. But it kept steady like that
until now (one gallon and a half).

Physically, rod play is one sign of wear too.

If you feel like you prefer to go with the ABC, yes you can just
drop in an ABC replacement Piston and Liner on your 421P and
it should be like having a 321P. But you may need to likewise
change the head button.

Hope this helps...
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Old 05-28-2004, 07:49 PM   #15
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Default 421p

Thank you guys so much. It is always nice to get another point of view. I feel much better about my purchase. I have yet to see what engine could do b/c i have it installed on a 235mm Impact. Is it common for the back end to swing out. i can't control it.
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