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Old 03-07-2004, 05:18 PM   #1
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Default Mario Rossi R1/PR21

anyone has any experience on the above mentioned engine?

I know there are 2 versions:

One is Nova Base which is R1 and the other one is Rex base PR21.

I want to get either one can anyone tell me the difference?

Thanks
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Old 03-08-2004, 06:11 PM   #2
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Default Re: Mario Rossi R1/PR21

Quote:
Originally posted by Ah10
anyone has any experience on the above mentioned engine?

I know there are 2 versions:

One is Nova Base which is R1 and the other one is Rex base PR21.

I want to get either one can anyone tell me the difference?

Thanks
Anyone have experience on the above engines?
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Old 03-08-2004, 06:27 PM   #3
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Default Re: Re: Mario Rossi R1/PR21

Quote:
Originally posted by Ah10
Anyone have experience on the above engines?
Check with JWF-RONNI, he got one Mario Rossi. He will tell you a lot of stuff about it.
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Old 03-08-2004, 07:06 PM   #4
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Default Re: Re: Mario Rossi R1/PR21

Quote:
Originally posted by Ah10
Anyone have experience on the above engines?
I run the M. Rossi...I really like it.
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Old 03-09-2004, 09:54 AM   #5
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Default Re: Re: Re: Mario Rossi R1/PR21

Quote:
Originally posted by C Verano
I run the M. Rossi...I really like it.
Hey Chris, how you doing?

how would you compare the M.Rossi R1 base vs JP R1? I remember you run the R1 base right?
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Old 03-09-2004, 10:33 AM   #6
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I had the privilege off tuning one of the factory sponsored engines last year. They are real fast engines. Pure power is all I can say about them plus some.

The JP doesnt get a look in compared to the Mario.

If im not mistaken the PR21 is a Paris Rex engine.
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Old 03-09-2004, 10:54 AM   #7
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Default

Quote:
Originally posted by modellor
I had the privilege off tuning one of the factory sponsored engines last year. They are real fast engines. Pure power is all I can say about them plus some.

The JP doesnt get a look in compared to the Mario.

If im not mistaken the PR21 is a Paris Rex engine.
To my best knowledge PR21 is Rex base engine but I dont think it is Paris Rex, I believe Paris only work on Top Line if I am not mistaken!

Thanks guys, and the reason I ask about this engine is I have an opportunity to get my hands on M. Rossi Nova Base R1 with a price that I can not refuse, so I really want to know the difference between the 2, R1 base and PR21 base.

I have seen how the PR21 base run, it is pretty damn fast, strong bottom and mid, and I would say it is pretty much about the same as Novamax 21 in terms of power band.

And I have also seen a lot of JP run, most of them are not that impressive to me, but a few of them are insanely fast I mean insanely, power everywhere, top end is silly fast, upward of 40k rpm.
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Old 03-09-2004, 11:05 AM   #8
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Quote:
Originally posted by Ah10
with a price that I can not refuse

hahaha it is an italian engine alright
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Old 03-09-2004, 11:22 AM   #9
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Quote:
Originally posted by Ah10
To my best knowledge PR21 is Rex base engine but I dont think it is Paris Rex, I believe Paris only work on Top Line if I am not mistaken!

Thanks guys, and the reason I ask about this engine is I have an opportunity to get my hands on M. Rossi Nova Base R1 with a price that I can not refuse, so I really want to know the difference between the 2, R1 base and PR21 base.

I have seen how the PR21 base run, it is pretty damn fast, strong bottom and mid, and I would say it is pretty much about the same as Novamax 21 in terms of power band.

And I have also seen a lot of JP run, most of them are not that impressive to me, but a few of them are insanely fast I mean insanely, power everywhere, top end is silly fast, upward of 40k rpm.
Quite possible. I havent been keeping up with the .21 engines lately until now. I agree about the JP, you will get one good engine out of a batch of 10. I have a real good JP Rex from '93. It was one off the real fast ones. But you really wont go wrong with the Mario. Its just amazing from one end of the power band to the other. If your getting a good price quoted go break his arm before he changes his mind.
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Old 03-09-2004, 11:53 AM   #10
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Default

Quote:
Originally posted by modellor
Quite possible. I havent been keeping up with the .21 engines lately until now. I agree about the JP, you will get one good engine out of a batch of 10. I have a real good JP Rex from '93. It was one off the real fast ones. But you really wont go wrong with the Mario. Its just amazing from one end of the power band to the other. If your getting a good price quoted go break his arm before he changes his mind.
All right thanks man! really appreciate your input!

by the way do you know the difference between the M.Rossi R1 VS M. Rossi PR21? besides the case, is the timing different? one thing that I know is all the piston and sleeve they are pretty much the same, Max, JP, MS and such.
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Old 03-24-2004, 03:33 PM   #11
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Quote:
Originally posted by Ah10
All right thanks man! really appreciate your input!

by the way do you know the difference between the M.Rossi R1 VS M. Rossi PR21? besides the case, is the timing different? one thing that I know is all the piston and sleeve they are pretty much the same, Max, JP, MS and such.
Ah10,

They should be the same (timing and porting), except for the AAC Versions.
But for some reason the PR21 (blue head) give guys the psychological effect that its quicker.

I was once told that REX means KING and so the Rex Versions have a bit more quality of work on them. I am not sure how true that is though.

Anyway, how is your JP Kangaroo Motor going along?
I may now have a Piston to give for you to use.
Let me know.
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Old 03-26-2004, 11:08 PM   #12
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Default M. Rossi .12

hey guys!

I see you are discussing M.Rossi .21 engines. maybe you can help me out on this one;

I just bought on ebay an M.Rossi - RS-12 S3 . It came in its box, sealed factory bag, it says M.Rossi on the head, stickers that say "Novarossi Factory Development" . Batch No.320/03CE. All looking good and original... It has a Great pinch!! even more than my NS12S5 or the RBV12. I'm going to have to break in this one on bench for sure

But I can't find ANY info on this engine in the whole web...

Anyone know this engine? Specs? any info?

Thanks
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Old 03-27-2004, 12:37 AM   #13
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Default Re: M. Rossi .12

Quote:
Originally posted by cox049
hey guys!

I see you are discussing M.Rossi .21 engines. maybe you can help me out on this one;

I just bought on ebay an M.Rossi - RS-12 S3 . It came in its box, sealed factory bag, it says M.Rossi on the head, stickers that say "Novarossi Factory Development" . Batch No.320/03CE. All looking good and original... It has a Great pinch!! even more than my NS12S5 or the RBV12. I'm going to have to break in this one on bench for sure

But I can't find ANY info on this engine in the whole web...

Anyone know this engine? Specs? any info?

Thanks
Hi Cox049,

The motor you have has the same specs as the standard
Novarossi RS-12 S3 which can be found in the novarossi
website: www.novarossi.it

Ofcourse what you have is a modified motor (mainly in the
timing not much in the porting). I was able to use one of
those and I find that they have a strong husky power band.
I find that both in the Mario Rossi .12s and the .21s.

I have also checked and asked if Mario Rossi has a specific
Website but the only info that was given was :

http://www.modelsport.nl/motoren/nov...informatie.htm

Hope this helps.
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Old 03-27-2004, 07:49 AM   #14
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Default Re: Re: M. Rossi .12

Quote:
Originally posted by jwf-ronni
Hi Cox049,

The motor you have has the same specs as the standard
Novarossi RS-12 S3 which can be found in the novarossi
website: www.novarossi.it

Ofcourse what you have is a modified motor (mainly in the
timing not much in the porting). I was able to use one of
those and I find that they have a strong husky power band.
I find that both in the Mario Rossi .12s and the .21s.

I have also checked and asked if Mario Rossi has a specific
Website but the only info that was given was :

http://www.modelsport.nl/motoren/nov...informatie.htm

Hope this helps.
It helps indeed! I checked NR website and all google and only found a .21 modified at mushroom.com. (and no specs on it either)
The thing is that I believe these engines are somewhat rare.
Now if the modification is in the timing and not in the porting I may be able to fit a turbo plug head (or chamber or whatever its called)

Do you think these engines got to USA through Trinity?
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Old 03-27-2004, 09:54 AM   #15
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hey jwf-ronni,
do you think this engine can keep up with other 3 port racing engines out there?
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