Part 7: My 76 Mazda RX-5 Cosmo Restoration - Intake and Exhaust Porting
Has it been nearly a month since my last episode? Wow, time does indeed fly. I've been quite busy preparing to build the engine. So in part 7, I cover the intake and Exhaust porting. The engine is being built with GSL-SE 6 port plates and the Cosmo rotor housings as the basis for a 6 port turbo setup. This port job is fairly conservative, only opening up the primary ports a little and bringing the Exhaust ports close to 2nd gen RX-7 specs. The goal is to maintain fuel economy, low and midrange torque, and idle quality. This episode covers everything involved in porting including: marking out the new ports, grinding the port shape, smoothing the bowls, smoothing port to runner transitions, smoothing the runners, grinding and blending the Exhaust ports.
Disassembling RE-Amemiya's GT 300 3-Rotor Race Engine
One of RE-Amemiya's mechanics gives the 101 on how to break the infamous Aspara Drink GT300 FD's motor down. Courtesy of RE4life.com.
"Mr. Imai, the mechanic at RE Amemiya shows how to disassemble 3-Rotor Engine, which was used for their GT 300 machine!"
Building a 13B-REW
This is how a 13B engine is brought to life from the Mazda factory. Courtesy of RE4life.com
"Mazda Factory's veteran Engineer, Mr. Uchitani shows how Rotary Engines are assembled. Amazing that each RE has been built by hand until 2003!"
MAZDA RX7 Rotary Engine Failures
MAZDA RX7 Rotary Engine Failures
MAZDA RX7 rotary engines are strong and displace a lot of power for their size. Traditionally, carbon deposits and heat are their biggest enemies. Rotary engines run with a huge temperature differential, meaning that one side of the engine runs cooler that the combustion side (side with the park plugs). As a rule, cooling system damage should be avoided at all costs.
Learn how these issues affect rotary engines and what kind of damage is done to them when they really fail.
Presented using advanced software CG animation technology to help you understand. Part of our Automotive Technology Rotary Wankel engines and MAZDA RX7-RX8 series shown here on this channel. Enjoy...
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Handbuilt 4-Rotor Engine
This was a project that took about five years of weekends to put together. There was a lot of trial and error as jury-rigged parts were improvised and revised, leaks were identified and plugged, and byzantine electrical diagrams were decoded. It still does not run smoothly, as there likely is a problem with the intake system that has prevented smooth timing at idle. But she runs!
lots of people wanted to know where the E-shaft came from: it was custom ordered from a shop in New Zealand.
The Mazda Rotary Engine Part 1
Educational film by Toyo Kogyo about the Mazda Rotary Engine. Shows how the Rotary engine works with comparisons to the Piston Engine. Also shows the Mazda RX500 test vehicle on a banked circuit and the Mazda Cosmo Sport (or 110S). Originates from the late 60's.
Rotary-Works Mazda Rx7 20B Drift Cars Idling.
2 Mazda Rx7's with 20B engines (3 rotors) with turbos. Built and tuned by Rene @ Rene's Motors Sports.
Both FD and FC Feature Rotary-Works V-Mounts, throttle body, intake pipes, hoses, and all other components available through our website.
FD runs a street port 20B with CXRacing turbo.
FC runs a Semi-peripheral-Street-port combination (note the radical idle) with a Comp turbo.
more info: www.Rotary-works.com
Rotary Wankel Motorcycle modified km3 p port
This is a motorcycle I am currently working on this is its first start, it is a honda MB100 with a sachs km3 wankel rotary engine which has been periphial ported, So it is yet to be tuned etc, The mower in the front is also a km3 powered unit, I will post more vids when its tuned and running