August 1, 2023

Spower Japan R7GT Factory Modified .21 Race Engine

Reigning 1:8 GT World Champion manufacturer Sworkz has release a new GT specific engine under its new Spower engine line of hand modified engines with it is calling SOUL (魂).  The first GT engine is the R7GT factory hand modified racing engine based on the world famous O.S Speed R21GT II.  Spower made some modification work and took it to another level.  Based on IFMAR regulations it comes standard with 5 scavenging and 3 exhaust ports.  The stronger DLC coating on new crankshaft has also 2 tungsten counterweights contributing to consistent idling and quicker RPM response according to the throttle movements.  It also comes standard with Spower’s Boost rear cover plate which helps this high RPM engine work more stable from the top speeds to the lower range.  The new printing technology not only makes the cooling head colourful but also makes it blend in with your car.  The factory combo setup with Conical Exhaust Manifold + EFRA 2165 or 2115 pipes, R7GT will provide a lot of power for your GT racing needs with the best fuel mileage.


Hand Modified 1/8 GT Racing Engine.

Pre-Break-In for Cylinder/Piston System.

Spower Boost rear cover plate is included.

IFMAR regulations standard with 5 scavenging and 3 exhaust ports.

DLC coating on the new crankshaft has 2 tungsten counterweights.

The new printing technology cooling head color design.

Spower Japan R7GT Factory Hand-Made Modified .21 Racing Engine (Pre-Break-in) Specifications

Displacement: 3.49cc (0.213

Power Output: 2.66ps/2.62 hp / 34,000 r.p.m.

Bore: 16.08mm (0.633 in.)

Stroke: 17.2mm (0.677in)

Practical R.P.M: 4,000~43,000 r.p.m

Weight: 362g (12.77oz.)(Engine only)

Source: Sworkz []


If you republish any elements from this page on another website, including text, original pictures or results please be sure to add a link back to this page as the source: