mtx3racer

Anybody know when this is coming out? The Novarossi RX 421 P

Ron C.

iTrader: (2)

Its should be out already.
In fact, I, along with a friend was using this motor in the
Speedline Race at Vegas this past weekend. If you would
be interested in one and cannot find it in your area, feel
free to PM me. Maybe I can help you out.

smitty

That engine Rocks!!!!
Got me in to the "B" main, and that's good for this old fart!
Smitty

Nitropimp

How much is it??

Ron C.

iTrader: (2)

You can call RJV Racing Products for a price quote inquiry.
They are carriers of the REX Line 421P Motor and I know
they have some of them readily available.

Their numbers are : (775) 782-6070 & (775) 782-4562
Ask for Richard and he should take care of you.

YBSLOW

iTrader: (9)

Not only did I hear they do not last long. I also heard novaRossi has allready scrapped the aluminum sleeve and that they were braking lots of pistons (something about the new micro casting). Do not know how true it is , but I heard it from a reliable source.
FWIW!

EdwardN

iTrader: (1)

I heard that too, from very reliable source-no surprize

C Verano

iTrader: (1)

My motor ran pretty well in Vegas...

EdwardN

iTrader: (1)

I heard about that. What we are talking about isn't perfrmance-it is that rumors ( from even very relible sources) that many problems accured on those engines.
From my expiince can tell you AAc set up is the best, but too many issues related to Al case and Al sleeve, so benefits from AAC performance are much smaller then issues following by that.
This is the reason why I don't make AAC for conventional design and this is the reason why my engine is AAC ( no sleeve, no cranckcase-one piece).
But again, I saw our engine on Airtronics and it was good ( i am not sure if it was AAC), but was good.

stefan

Uuuuuhhh

I'm not sure if I like that statement.

Should I be concerned about the engine I just broke in?

EdwardN

iTrader: (1)

No, we knew about issues for years and we made some drastic changes which will help prevent some of it. I wouldn't concern at all.

Ron C.

iTrader: (2)

I think there should be no worries.
The Rex 421P motor I ran at the Speedline Race was, in my opinion, pretty awesome! It surely had PULL and to some people who saw it, they said it was "Nasty Fast" on the straight. It was temping between 220 to 240, and for Vegas conditions, I think that it was pretty good.

And last Sunday, another driver was running the same motor at Rev (Southern California) and it was likewise ballistic! And the best part was that the motor was temping between 196 to 217 only.

slooookomo

iTrader: (4)

I have 2 hours on the Max AAC version with 1 rod change. The motor seems to hold up so far. There are signs of wear on the outside of the liner from vibration rubbing on crank case.

They do rev harder and power range has shifted upward as well. Hince you have to tighten up clutch spring and gear it lower. Don't be alarm if there are no nib left... They are like that after runin...

I still think they are the motor to have at this stage... Then of course time will tell if they last.