Manually cranking a freshly built 12A peripheral port engine. The engine is built with 3 window bearings, is doweled and has a shimmed oil pressure regulator. Ultimately it will run EFI and be turbocharged. Plugs are installed (listen to those pops!)
Part 36: Fuel System and Fuel Lines - My 76 Mazda RX-5 Cosmo Restoration
With any rotary, a robust fuel system is a critical component in
reliability. This is what will be covered in part 36 of my '76 Mazda Cosmo
restoration. In this episode I set up the engine bay section of the fuel
system. This includes the regulator, fuel Y block, and all the fuel hoses
using braided line and AN fittings. I also bend up a set of stainless fuel
lines for underneath the car. The fuel tank also needed some attention so I
begin the process of getting it cleaned out and ready for modification to
handle an in-tank EFI pump.
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.
SCREAMING 20B rotary engine dyno ~ JPC
Centreline Suspension's 20B PP rotary engine from their Mazda RX-7 Sports
Sedan circuit racer on the Dyno at JPC.
How to rebuild a Rotary Bridge Port engine ~ fullBOOST tech files
FullBoost Tech Files, Ep 1 ~ Rebuild
and Bridgeport of a 13B rotary engine @ Mr Parts.
We have started with a stripped down 1984 Mazda RX7 13BT engine, and will
run through the steps involved in bridge porting the engine, then assembly,
to the start up in its new home, a 1972 Mazda 808 (RX3). [
Get your track gear!
Follow us on social media @
Part 34: Water To Air Intercooler Installation, Part 1 - My 76 Mazda RX-5 Cosmo Restoration
It's time for part 34 of my '76 Mazda RX-5 Cosmo restoration. This time,
I'm installing the water to air Intercooler. I've installed and
fabricated plenty of air to air Intercoolers in my time but never a
water to air unit. I chose to use water to air on the Cosmo because it
meant that I could keep the piping as short as possible for the best Boost response and because of the
limited amount of room to run charge piping out to the front of the car due
to the large rad and A/C condenser. It was definitely a learning experience
for me as I underestimated the amount of time needed to fabricate all of
the components. Thus, I have split the episode into two parts. In part 1 of
the installation, I fabricate a throttle inlet adapter to fit the FD
throttle body, position and mount the Intercooler, build charge piping, weld
on a BOV flange and IAT bung, fabricate an aluminium water tank with
inlet/outlet/fill bungs and mount the heat front heat exchanger.
Mazda RX-7 Spitting Huge Flames from Exhaust!
When I was driving back from an event, this turbocharged Mazda RX-7 FD3S passed me in a
tunnel. As you can see this tuned Mazda RX-7 FD3S was spitting some huge
flames from the Exhaust! Hate it or
love it, I really enjoyed it! :)
1st Channel: http://www.YouTube.com/GUMBAL
2nd Channel: http://www.YouTube.com/GUMBALTV
3rd Channel: http://www.YouTube.com/CarChannelClassic
Thanks you for watching my videos. All feedback on my videos are
appreciated! Don't forget to like the video and subscribe to my channel.
More videos coming up!
Part 35: Water To Air Intercooler Installation, Part 2 - My 76 Mazda RX-5 Cosmo Restoration
In the last episode of my '76 Mazda Cosmo restoration, the basic components
of the water to air Intercooler system were laid out along
with the considerable amount of fabrication needed to build the throttle
body inlet, Intercooler
piping and water tank. As well as mount the heat exchanger and BOV. In part
35, we finish up the water to air Intercooler installation by taking care
of mounting the pump, plumbing all the water lines and wiring up the
system. Additionally support brackets are built to support the piping. Lack
of space meant I had to get creative with pump position after accidentally
creating a clearance issue with the water fittings. However once mounted I
was very happy with pump position and the plumbing was straightforward.
Included in this episode: Cutting/grinding/drilling aluminium, making
aluminium brackets, assembling AN house and fittings, wiring relay to spare
Megasquirt output, adding temperature sensor to Megasquirt analog input,
plumbing air to water Intercooler with tank and pump, TIG
Nitrous LSx Mazda RX-7 vs E85 Big Turbo EVO on slicks!
EVO HAD CLUTCH ISSUES REMATCH COMING SOON!!
OutOfOrder EVO vs DNR Performance LSx RX-7
Shoutout to 3HeadedElephantS for the GoPro Footage! Checkout his channel
and subscribe, also watch his badass edit of this same race here:
20B rotary RX-7 Spirit R: The Ultimate Street Mazda
Built by Promaz Automotive, we think it's hard to go past Steve's wicked
Series 8 FD RX-7 if rotaries are your game. Limited to around 1500 unit's,
the Spirit R was the last of the RX-7's and featured a lot of upgraded
factory parts as well as a low 1100kg weight.
Now powered by a lethal Promaz triple rotor 20B extend port rotary engine,
power is aided by a Garrett GT42R turbo
and MicroTech fuel system and transmitted through an Albins 5-speed gearbox
and KAAZ rear end [ http://www.promaz.com.au ].
WILD 9-second 13B rotary turbo Mazda RX4
Andrew's Mazda RX4 street car runs into the 9-second zone at Heathcote
Raceway. The car is powered by a Promaz Automotive 13B rotary bridge port
engine and Boosted by a Garrett T66
turbocharger and MicroTech EFI system.
Power is transmitted through an RX-7 5-speed manual gearbox.
Get your track gear!
Follow us on social media @
Heathcote Park Raceway, Australia - August 17th 2014.