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Is ROSSI an equal to JETT? and Rossi .45 vs .53?

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Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Old 11-01-2003, 07:42 AM
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Default Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Will I get similar speed with a Rossi .45 an a Jett .46?

Are the Rossi .53's really that much more powerful than the .45? I know it's BS, but the .45 is rated at 2.1hp at 16K, and the .53 is 2.2hp at 18K. Not a tremendous difference for more than $50.

Does anyone have any RPM figures on the Rossi's?

I want to get a high speed engine, but cringe at the prices of the Jett's. I'd be happy with a close second to them if I could get a Rossi and save $130.

Thanks,
--Rick
Old 11-01-2003, 11:03 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

This thread will probably get "squirrely" with folks saying:

1. That the Rossi is hard to tune (which is not the case-)
2. Someone will tell you their GMS, Magnum, or OS-46FX is just as good [X(]
3. That Nelson or MVVS GRRT motors are faster-(not sport engines anyway-)

What plane we talking bout? The Rossi's supposedly rev well when propped down 9x8/ 9x9 dunno if they can compete with the Jett-46

Most people run the Jett-50 (myself included-) so I am not sure about the 46- I have the Rossi-45 also, but my tach. is a piece of crap so I can never show RPM's-

If I had $150 to throw at a sport/speed engine I would get the Rossi-45, and Webra-50 would be a close 2nd-

I love engine decisions!
Old 11-01-2003, 11:10 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Rick,
I've modified and tested lots of Rossi's and Jetts. There is nothing "magic" about a Jett, but it is a well designed and made engine that comes set up for high RPM and tuned pipe use. The Rossi Aero (Not Ducted Fan) Engines come with 148 to 154 Degree Exhaust Timing, 11 to 15 Degree Blowdown angle, and compression ratio appropriate for 0 to 5% Nitro. What all this means is that unmodified out of the box a Jett 46 will outurn a Rossi 45 by a good margin.

BUT:

If you adjust the Timing and Compression Ratio on the Rossi, IT WILL TURN EVERY BIT AS FAST AS THE JETT!!!![X(]
Old 11-01-2003, 11:52 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

ORIGINAL: rsieminski

Will I get similar speed with a Rossi .45 an a Jett .46?

I want to get a high speed engine, but cringe at the prices of the Jett's. I'd be happy with a close second to them if I could get a Rossi and save $130.

Thanks,
--Rick
Close, if you purchase one of Nelson or Jett tuned muffler (approx $60). Even though with upgraded tuned muffler, it's still not in the same speed range.

Speed cost, period. If you want the best investment, you need to buy a Jett. It may cost you a little more now, but for the long haul it will be cheaper. Plus, the Jett have the best carburetor system in the industry, bar none. So reliable idle and transition is big thing to some people (not me, top-end speed only baby!).

On the other hand, the Rossi is a good engine, but will not hold up like a Jett under the same high RPM, high stress in high speed application for long term use. But it's your call...

Remember... Jett quality comes from racing stock, not your everyday Sport engines!
Old 11-14-2003, 03:21 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

ORIGINAL: ewspears

Rick,
I've modified and tested lots of Rossi's and Jetts. What all this means is that
unmodified out of the box a Jett 46 will outurn a Rossi 45 by a good margin.
Esten....I don't doubt your word....but what will the the stock Jett .46 turn ?
I don't know if my .45 Rossi is a Freak or not....but it turns 18,100 on the
ground, and over 20 in the air, on the pipe....[X(]

Dave.
Old 11-14-2003, 02:44 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Dave,
What prop is your Rossi 45 turning 18.1K on the ground?? If it is a stock (unaltered) Rossi 45 Aero Engine, the peak power is about 16.5K although it will turn much higher than that with a too small prop. As for the comparison to the Jett; The Jett 46 comes with a longer Exhaust Duration and "Blowdown" Angle. which means it is set up to produce max power at a higher RPM (about 18K). The Rossi can be modified to turn a same prop just as fast as the Jett by changing to longer exhaust timing and blowdown angle so that it is the same as the Jett timing. Also to turn as hard as the Jett the Rossi would need a head shim so it could use the same nitro content as the Jett.

Ducted Fan Engines, Raceboat Engines, Racing Car/Buggy, and Nelson Race Engines, all Have even more; exhaust duration, blowdown angle, and horsepower per cubic inch. They have max power RPM's of 20 to 35K.
For Modelers that want to go fast but don't have the experience or tools to modify the sport aero engines; I recommend they use Ducted Fan Engines. The DF Engines can be purchased used at very reasonable prices and in most cases will outurn a more expensive Jett!

Oh, By the way, Do you want that Header for your Rossi 90?
Old 11-14-2003, 04:36 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Esten....I'm using a 9 1/2-6 Mas on it with 5% Powermaster, and an extra
touch of bean in it. I started out with an APC 10-6 on it....and it would only
turn a miserable 14K. I stuck the MAS on it, cause it was the only small prop
I had....and it screams, plus it goes about 20 mph faster. Been on there
ever since. I got a bunch of props since then, but I'll run that one till it breaks,
or the engine blows.

Yes I still want the header....Morris said the would send the right one, if they
had one, but it never came.....so I guess they don't have it.
The angle on your header is wrong....do you have a 1" tubing bender ? I'll get
that check off to you soon....I've been really busy....doing a "Pro-Street" number
on my Model A sedan....[8D]

Dave.
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Old 11-14-2003, 05:13 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

One thing to keep i mind is one of my methods. I also look for good service and Rossi does not have it, Just try and get that thing fixed.
Old 11-15-2003, 09:56 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Dave,

COOL PROJECT!!

I too have a project that uses a lot of my time.
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Old 11-15-2003, 11:42 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Esten,
that does not look like the Phoenix 8 i sold you last december
Bob
Old 11-19-2003, 08:59 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

I will say this and I ain't no expert. I've got the MVVS 49 with tuned thingy and it's a HOSS or so I thought till I broke down and bought a Jet 50 due to the coaxing of AirGar and Razor..
Find some way to fork out the bread for a Jet..
I can promise you..YOU WON'T BE DISAPPOINTED!!!!

This thing was scary,just on the test stand with a 9X9.And it's pretty too.

My 2 cents
Walt
Old 11-19-2003, 11:35 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Gotta love that peer pressure! You got a plane for that thing yet?

Take care,
james
Old 11-19-2003, 11:57 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

ORIGINAL: ewspears

Dave,

COOL PROJECT!!

I too have a project that uses a lot of my time.
Well, I've seen the instrument panel and the horizontal stab/elevator. What's the "rest of the story (plane)"?
Old 11-19-2003, 12:53 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

DONT DO THE ROSSI

Stick with the JETT...You wont be sorry. You may be very sorry for purchasing the Rossi if you have any, I mean any problems. JETT you wont have to worry about ****ty customer service and jacked up carbs as you may with Rossi's....Not to mention the problems with the needle valve.......Stick with JETT if you want performance, customer service, and minimul hastles.....IF not, stick with ROSSI...


my .02
Old 11-19-2003, 02:33 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Q-Ball is right. If you have never seen a Jett 50 run up close and personal, your first experience can best be described as scary. Just the sound will make you think this thing is going to eat my fingers, and spit out the bones. Dubb should be giving us all a Christmas special for all this good pub!

Paul
Old 11-25-2003, 10:53 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

And I thought my 46 jett was going to eat the table I broke it in on. Impresive little powerhouse... now I want the 50.........and the 90
Old 11-25-2003, 11:20 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Its a sickness! I want a F.I.R.E. for my next Whip Have to settle for a K&B 7.5 DF engine...

Best $175- I have spent in the hobby was my "slightly used" Jett-50!

Happy turkey day folks!
james
Old 11-26-2003, 08:16 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

James,

Whaddya know 'bout the Jett .60 or .65? I thought about buying one for the DC F-20, and using the 50 for sumtin' else. Someone was saying they switched from the 50 to one of these and saw a noticeable speed difference. I kind of find that hard to believe unless his plane was on the heavy side.

Numbers don't lie, and it hard not to like the numbers for the 50, eh?

Thoughts?

Gary
Old 11-26-2003, 11:13 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

I have never seen the 60 perform but I remember reading wherea guy with the DC F-20 went from a Jett-50 to a 60 and I think he was the one saying the difference was noticeable (?)

Can't remember how heavy it was though...
Old 11-26-2003, 12:51 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Gary,
I've owned and modified a Jett BSE 65L and talked to Dub about the 60 and 65L's. They are in the same case as the 50 and 46. This means they have the same size flowpath as the 46 & 50. They also have port timing with less exhaust duration than the 46 or 50. They were designed for 3-D application to turn in the 15 to 16K range. They can be modified but due to the small light case limitations, even after modification they will not pull as hard as a well set up full size case 60 - 65 Engine (YS, Rossi, & etc.)

For a light weight high performance engine the Jett 50 is hard to beat. The next step up in power and weight would be a 60 to 81 DF engine.
Old 11-26-2003, 04:33 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Wow Esten, thanks for the info!! Hmmmmm......maybe I'll just have to pick me up anudder 50......hmmmmmm.

I checked Dub's site, and didn't really see anything about them 2 that impressed me, when compared to the 50, of course!

The 46 didn't look to bad though!

Gary
Old 12-04-2007, 01:03 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?


ORIGINAL: ewspears

Dave,
What prop is your Rossi 45 turning 18.1K on the ground?? If it is a stock (unaltered) Rossi 45 Aero Engine, the peak power is about 16.5K although it will turn much higher than that with a too small prop. As for the comparison to the Jett; The Jett 46 comes with a longer Exhaust Duration and "Blowdown" Angle. which means it is set up to produce max power at a higher RPM (about 18K). The Rossi can be modified to turn a same prop just as fast as the Jett by changing to longer exhaust timing and blowdown angle so that it is the same as the Jett timing. Also to turn as hard as the Jett the Rossi would need a head shim so it could use the same nitro content as the Jett.

Ducted Fan Engines, Raceboat Engines, Racing Car/Buggy, and Nelson Race Engines, all Have even more; exhaust duration, blowdown angle, and horsepower per cubic inch. They have max power RPM's of 20 to 35K.
For Modelers that want to go fast but don't have the experience or tools to modify the sport aero engines; I recommend they use Ducted Fan Engines. The DF Engines can be purchased used at very reasonable prices and in most cases will outurn a more expensive Jett!

Oh, By the way, Do you want that Header for your Rossi 90?

Hi Esten,

I have a Rossi 53 that I have increased the exhaust duration by 10 degrees to 170. This mod along with some fangs on the sleeve have helped a bit, but I am really curious about mods that you have done to your Rossi 45. If you don't mind sharing some info, what is the Exhaust timing on the Jett 46? Also, do you know what the timing for the intake is and what the compression ratio is?

Thanks,

Rick
Old 04-23-2009, 10:58 PM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

I know this is a little off topic. I have a rossi .45 that needs new bearings and high speed needle. Anyone know where i can get it serviced?
Old 04-24-2009, 07:38 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

Get new bearings from Boca Bearing, they are a forum sponsor. Inexpensive and very fast shipping, they have a few different qualities of bearings from steel to ceramic for every type of engine. Replacing them is easy and Boca sends instructions with the bearings.
Old 04-24-2009, 08:16 AM
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Default RE: Is ROSSI an equal to JETT? and Rossi .45 vs .53?

BEST OF BOTH WORLDS[sm=thumbup.gif]

Now here's a combination......Rossi 45....Jett Carb....Jettstream Muffler.....Jett remote needle.....YeeeeeHaaaa Going to the field to test it in the Kaos today[8D] Then it is going on one of ANGEL's RIFLES[X(] Can't Wait!
I'm going to tach several different props so I will post the results.
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