REX Engines USA

Old 12-24-2014, 09:59 AM
  #1  
Tech Elite
Thread Starter
iTrader: (5)
 
Hoese37's Avatar
 
Join Date: Apr 2007
Location: Hutchinson, MN
Posts: 3,819
Trader Rating: 5 (100%+)
Default REX Engines USA

A familiar name has come back to the nitro engine game. REX/Novarossi car engines are back. 4 new .21 mills and a .28.

First up the Paloma .21: Looks like the Keep Off .21-7XL

TECH SPECS:

Displacement: 3,49 cc
R.P.M. (max power): 35.800 RPM
Practical range: 6.000-40.700 R.P.M.
Bore x stroke: 15,88x17,60 mm
Sleeve: 7 ports

R21 Plus5: Looks to be the same as the P5

TECH SPECS;

Displacement: 3,49 cc
R.P.M. (max power): 34.500 RPM
Practical range: 6.000-36.200 R.P.M.
Bore x stroke: 16,26x16,80 mm
Sleeve: 5 ports

R21 Plus8: Looks to be the 421SB/821SB

TECH SPECS:
Displacement: 3,49 cc
R.P.M. (max power): 36.200 RPM
Practical range: 6.000-40.200 R.P.M.
Bore x stroke: 16,26x16,80 mm
Sleeve: 8 ports
Hoese37 is offline  
Old 12-24-2014, 10:01 AM
  #2  
Tech Elite
Thread Starter
iTrader: (5)
 
Hoese37's Avatar
 
Join Date: Apr 2007
Location: Hutchinson, MN
Posts: 3,819
Trader Rating: 5 (100%+)
Default

R28-7M:

TECH SPECS:

Displacement: 4,66 cc
R.P.M. (max power): 33.500 RPM
Practical range: 6.000-38.200 R.P.M.
Bore x stroke: 18,35x17,60 mm
Sleeve: 7 ports
Hoese37 is offline  
Old 12-24-2014, 10:16 AM
  #3  
Tech Elite
iTrader: (67)
 
22Racer's Avatar
 
Join Date: Mar 2002
Location: Wanamingo Mn
Posts: 3,150
Trader Rating: 67 (100%+)
Default

Plus 5 is nothing like a P5, 14.5mm weighted crank, different sleeve etc.

Rex
22Racer is offline  
Old 12-24-2014, 11:32 AM
  #4  
Tech Elite
Thread Starter
iTrader: (5)
 
Hoese37's Avatar
 
Join Date: Apr 2007
Location: Hutchinson, MN
Posts: 3,819
Trader Rating: 5 (100%+)
Default

Im just comparing by part numbers at the moment. Im sure there are differences, as these seem to be some classic Nova mills, with updated internals to bring them up to spec with the current models.
Hoese37 is offline  
Old 12-24-2014, 02:59 PM
  #5  
Tech Regular
iTrader: (18)
 
GarrettMcKamie's Avatar
 
Join Date: Oct 2010
Location: Chattanooga Tennessee
Posts: 329
Trader Rating: 18 (100%+)
Default

Almost have a gallon on my Plus 5 and loving it! Getting around 10.5 mins on a tank and not fully broken in yet with killer power. 41021 header 9901ss pipe Vp Powermaster fuel on TLR 3.0
GarrettMcKamie is offline  
Old 12-24-2014, 11:15 PM
  #6  
Tech Initiate
 
Join Date: Sep 2009
Posts: 49
Default

The Plus 5 is very similar to the Novarossi BTT. With more power in the mid and top end. It has a very usable power band. We are getting great run times.
Dcracing2 is offline  
Old 12-25-2014, 01:09 PM
  #7  
Tech Addict
iTrader: (3)
 
mercfocus's Avatar
 
Join Date: Jan 2014
Location: Yuma, AZ
Posts: 572
Trader Rating: 3 (100%+)
Default

Got the Paloma 21 a couple months ago.

This one here:

http://rex-usa.com/R-PALOMA21-LIMITE...RPALOMA21L.htm

Awesome!

Running it with a JP4 and Sidewinder 30%. I think it's made the OFNA I put it in into possibly my fastest car.

Had to change the front bearing already at about 1 gallon but for $15, that was no big deal.

I was going to order the 9901 SuperStrong to see what difference it will make but xmas sorta made me wait til the payday.
Attached Thumbnails REX Engines USA-dsc00024.jpg   REX Engines USA-dsc00244.jpg   REX Engines USA-dsc00512.jpg   REX Engines USA-dsc01301.jpg   REX Engines USA-dsc09863.jpg  

mercfocus is offline  
Old 12-25-2014, 01:32 PM
  #8  
Tech Addict
iTrader: (3)
 
mercfocus's Avatar
 
Join Date: Jan 2014
Location: Yuma, AZ
Posts: 572
Trader Rating: 3 (100%+)
Default

Oh ya, and what I forgot to mention:

When I changed the bearing, I saw a lot of the same Nova parts in there. The R7 rod and the piston & sleeve looked pretty much exactly like my Beat 5.

The carbs are for sure the same. That's obvious but the Rex didn't have that extra tight head button and O-ring like my Beat 5.

And I finally just found one of my pics of my Rex out of the car.
Attached Thumbnails REX Engines USA-dsc08264.jpg  
mercfocus is offline  
Old 12-25-2014, 01:36 PM
  #9  
Tech Fanatic
iTrader: (11)
 
croracer's Avatar
 
Join Date: Jan 2009
Location: So. California
Posts: 897
Trader Rating: 11 (100%+)
Default

whats the difference in the limited paloma vs the blue paloma, besides the orange head?
croracer is offline  
Old 12-25-2014, 02:33 PM
  #10  
Tech Addict
iTrader: (3)
 
mercfocus's Avatar
 
Join Date: Jan 2014
Location: Yuma, AZ
Posts: 572
Trader Rating: 3 (100%+)
Default

Originally Posted by croracer View Post
whats the difference in the limited paloma vs the blue paloma, besides the orange head?
From what I understand, the blue head is a 5 port and the orange head is a 7 port.

There's also something I read in RC Driver magazine about the size difference in the crank and one other thing but I don't remember what it was.
mercfocus is offline  
Old 12-25-2014, 02:41 PM
  #11  
Tech Addict
iTrader: (3)
 
mercfocus's Avatar
 
Join Date: Jan 2014
Location: Yuma, AZ
Posts: 572
Trader Rating: 3 (100%+)
Default

Upon further inspection, I see I might have had it confused with the 5 port.

The blue head Paloma is probably also a 7 port.

Tring to find what I did with that mag issue that talks about this.
mercfocus is offline  
Old 12-25-2014, 07:53 PM
  #12  
Tech Elite
iTrader: (67)
 
22Racer's Avatar
 
Join Date: Mar 2002
Location: Wanamingo Mn
Posts: 3,150
Trader Rating: 67 (100%+)
Default

Originally Posted by croracer View Post
whats the difference in the limited paloma vs the blue paloma, besides the orange head?
The Paloma and the Paloma limited are quite different. The Limited is a standard long stroke 7 port, I thought it looked similar to a Fusion X7. The Blue head Paloma is basically a Nova Bonito, 7 port extra long stroke.

Rex
22Racer is offline  
Old 12-25-2014, 08:50 PM
  #13  
Tech Elite
iTrader: (1)
 
hambone's Avatar
 
Join Date: Aug 2008
Location: Bloomsburg, Pa.
Posts: 2,436
Trader Rating: 1 (100%+)
Default

Originally Posted by 22Racer View Post
The Paloma and the Paloma limited are quite different. The Limited is a standard long stroke 7 port, I thought it looked similar to a Fusion X7. The Blue head Paloma is basically a Nova Bonito, 7 port extra long stroke.

Rex
Rex, how does the 5 port sleeve differ from P5?
hambone is offline  
Old 12-26-2014, 07:58 AM
  #14  
Tech Prophet
iTrader: (96)
 
houston's Avatar
 
Join Date: Sep 2004
Location: Sherwood,OR
Posts: 15,841
Trader Rating: 96 (100%+)
Default

Originally Posted by 22Racer View Post
The Paloma and the Paloma limited are quite different. The Limited is a standard long stroke 7 port, I thought it looked similar to a Fusion X7. The Blue head Paloma is basically a Nova Bonito, 7 port extra long stroke.

Rex
You mean an older plus 2 367?

These are old spare parts engines so nova can recoop some money from dead inventory

Not saying its a bad thing just dfrnt
houston is offline  
Old 12-26-2014, 08:03 AM
  #15  
am
Tech Master
 
Join Date: Jul 2004
Location: Norway
Posts: 1,840
Default

Like Rb limited series engines :-)
am is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.