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.
Rotary engine 13B opening
Ouverture de mon 13B dans le but de le rebuilder. C'est mon premier rotatif, soyez indulgent avec les petites erreurs que j'ai pu faire. Opening my 13B rotary engine to rebuild it. It's my first rebuild, so please excuse the mistake I've made.
Part 4: My 76 Mazda RX-5 Cosmo Restoration - Engine Cleaning Continued
In part 4 of my Cosmo restoration, I continue cleaning the engine components, a task which was started in the last video. It is actually quite involved to clean and inspect the internal engine parts and it can easily take more time then it does to disassemble and build the engine. While I did clean all the parts from the 4 port Cosmo 13B, I will only be using the housings, oil pan and a few other components. The rest of the engine will be the irons and rotating assembly from a GSL-SE 13B.
13B PP Race Motor - Test start
Test starting my 13Bpp race motor built by Redline Rotary in Sydney. Highly recommended, thanks guys!