Part 12: 13B Rotary Engine Rebuild - My 76 Mazda RX-5 Cosmo Restoration
Just as I promised last episode, it is finally time to build the engine!
Part 12 of my RX-5 Cosmo restoration covers the entire process of building
the 6 port 13B Mazda rotary engine. While this engine is a hybrid of GSL-SE
RX-7 and Cosmo parts, the process is the same for any rotary from a 12A to
a 13B NA, 13B turbo, 13B-REW or any
other variant of the 13B. This video shows the whole process of the engine
build, starting from measuring the rotors and covering everything else
including clearancing the side seals, assembling the rotors, complete
assembly the short block, setting the eccentric shaft end play and
installing the front cover and everything underneath it. It's probably the
most complete engine build video outside of what you can buy from the
vendors, and as such, is an hour long. After this one, I'm going back to
videos under 20 minutes. But for now, grab a beverage of your choice, sit
back, and enjoy.
Mini 1380 Turbo
Test drive after oil leak repairs and actuator pre-load adjustment.
At 16psi peak, holding around 14psi:
165bhp with 19bhp lost to transmission giving 146bhp at the wheels.
217ft lbs torque @ 3500rpm which is the turbo kicking in full Boost
176ft lbs torque @ 4900rpm where the bhp graph starts to level out
Heathcote Park - July 10
From last weeks Heathcote Park test and tune are a 9-second Mazda RX-7,
11-second Ford XR6, HSV VE GTS and more.
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!"