REDS 721 Scuderia Gen 2 S Series .21 Off-Road Competition Nitro Engine Combo w/2143 X-ONE Torque Tuned Pipe (Black)

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REDS 721 Scuderia Gen 2 S Series .21 Off-Road Competition Nitro Engine Combo
Price: $589.99
Discontinued Online
This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
The REDS 721 Scuderia Gen 2 S Series .21 Off-Road Competition Nitro Engine Combo, with an included 2143 X-ONE Torque Tuned exhaust system and 6.0, 7.0 and 8.0mm carburetor venturis. The 721 Scuderia Gen 2 S Series builds on the successes of the 721 Scuderia GEN1 engine, with the primary features remaining unchanged. The Gen 2 features a redesigned carburetor with unique materials that increase reliability. The carb features a double grab screw joint link to facilitate positioning and fitting with the servo link. Combine this with the hand tuned DLC coated crankshaft, ceramic rear bearing, and final inspection personally completed by Mario and Marco Rossi, and you have a cutting edge, competition grade engine manufactured to the highest quality standards. 

Features: 
  • NEXT GENERATION ENGINE: The 721 S Scuderia features high reliability, tuning stability and great fuel mileage. Combined with specific technical changes in the porting and materials, this 7 port engine makes more power and offers better fuel efficiency than any previous REDS engine model.
  • CARBURETOR: The GEN2 engine features a redesigned carburetor with unique materials to increase reliability and tuning stability, in particular the insulator bushing has been improved with a higher strength material. Furthermore, it features an updated double grab screw joint link to facilitate positioning and fitting with the servo link.
  • INNOVATION: REDS is always striving to innovate. This means investment into new core technologies. Drawing from the rich experience gained through competing on the world’s best RC tracks with the best drivers in the world, REDS' goal is to deliver quality products that are built with passion. 
  • A DIAMOND IS FOREVER: 721 Scuderia Gen 2 S comes with a DLC Coated crankshaft and backplate for improved engine durability. The crankshaft can last approximately 3 times more than a conventional steel crankshaft thanks to the extreme hardness of the diamond coating. Even the conrod life is lengthened about 50%.
  • HANDMADE, TUNED AND ASSEMBLED: The 721 Scuderia Gen 2 S engine is hand-tuned with a silicone-filled, balanced and tuned crankshaft by M. Rossi. Every single engine is hand inspected and compression checked inside REDS Racing headquarters by Mario and Marco Rossi to achieve the highest quality standards. This is core to the values that makes Reds Racing engines different from any other brand on the market.
  • INCLUDES 2143 X-ONE TORQUE TUNED PIPE: The X-ONE tuned pipe is an innovative all-in-one pipe-manifold system. The pipe has been welded to the manifold to improve performance and fuel consumption. With X-ONE configuration there is no need for springs or gaskets, and the one piece design creates increased reliability and improved tuning stability.
Specifications:
Category: 1/8 Buggy and Truggy
Displacement: 3.5cc
Bore: 16.2mm
Stroke: 16.9mm
Inlet ports: 7
Outlet ports: 1
Front ball bearing dimension: 7x19x6mm, rubber seal made in Japan
Rear ball bearing dimension: 14x25.4x6mm, Swiss made ceramic
Carburetor venturi diameter: 6.0, 7.0 and 8.0mm included
Carburetor: VCX2-A Aluminum Short needle
Weight: 345g
Fuel consumption: > 9:00 min
Engine temperature: 230-266°F (110-130°C)
Recommended Glow plug: REDS TS3
Included tuned pipe: REDS 2143 XONE Torque
Recommended fuel: 25-30% nitro, 8-10% oil
Break-in fuel: 12% oil

This product was added to our catalog on March 2, 2020

JV
Verified Owner
Friday, Dec 31 2021 (about 2 years ago)
REDS 721 Scuderia Gen 2 S Series .21 Off-Road Competition Nitro Engine Combo
Pretty cool engine once you figure out what you're doing. Generally it's an engine that's out of my league and skill level, but it's a very good engine if you find a place to use it. Now that I had all of the gremlins sorted out, I'm confident enough to be able to give this a review.

Highlights: It packs a lot of bottom end torque with the combined exhaust system. It will get you through those big triples with no problem. It's great when powering out of tight corners that go into longer jump sections.

Areas of Improvement: Maybe I had a bad batch, but I discovered an air leak with my engines. I know that the batch I had from Q4 2019 and Q1 2020 had some air leaks. Air leaks were fixable with rebuilding with new o rings and RTV as an insurance plan. It wants to run off and idle a little high, but that was quickly fixed by adding a shim.

Overview:
This engine packs a lot of low end power (which is what I generally prefer). On the bigger, longer tracks, maybe something smoother will be better.

I liken and compare this engine to American trucks vs Japanese trucks. This REDS engine is more like the American trucks - pretty sexy and pack a lot of power, but requires a lot of attention to detail related to tuning and modifying (adding/experimenting with shims/venturis/etc). The OS-based engines might use softer materials and may not be as powerful as the Italian engines, but are super reliable out of the box and don't require as much attention to tuning as it does this REDS. Despite that, I can still recommend it because this experience has taken my tuning skill to the next level.

Product would score a 5/5 if I didn't have an air leak or require a shim, but otherwise, it's pretty awesome once you get it going.

I'm still interested in REDS, as it seems like they're looking to improve with the superveloce and the new engine with the 3-needle carb. I've also heard good things about their mid-priced engines, too. Looking forward to learning more about the hobby.
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