It’s Alive!

Big milestone reached with the Miata project. Still a big mountain to climb ahead as I teach myself how to tune it so that it actually drives under its own power safely and reliably. But it feels good to finally have reached this point. I thunk I was an engineer and now I are one ­čÖé   1991 Mazda Miata with 2000 BP4W motor swap, TWM / Borla individual throttle bodies and MS Labs Basic MS3 Megasquirt ECU. Starts, idles and revs with no load. This is about as far as a base map will get you. Now the real […]

IAT Sensor Mounting Location

Getting super accurate IAT readings with an ITB setup isn’t so easy without a cold air intake plenum. While a cold air box is ideal, to begin with, I’m running an open element air filter. Accordingly, I┬ámust accept that there will be some IAT error no matter where I┬ámount the sensor.   Initially, I mounted my IAT to the shock tower on the exhaust side of the engine bay and some people questioned that decision. I figured it wouldn’t be that big of a deal since the exhaust manifold is getting a thermal insulating blanket from Track Dog Racing. And […]

Project Miata Update

Got another day to work on the car. My dad got the Golden Eagle vacuum manifold mounted and the vacuum connections made. He also made a little bracket to help support the coolant return hard pipe and fit the PCV oil vapor catch can.   We had to redo the throttle cable end so that we could use the TWM supplied cable adjuster. First we cut off the factory adjuster that was swedged onto the cable conduit. Fortunately my tackle box of cable making parts from Flanders came in handy as I needed to fit a cable ferrule over the […]

Project Miata Update

Made some more progress over the weekend. – All new clutch hydraulic system filled and bled – Throttle cable shortened – Vacuum manifold installed on fuse box bracket where windshield washer bottle used to be – Vacuum line for MAP sensor routed through firewall to ECU – Vacuum caps and constant tension spring clamps fit to the hose barbs above each intake runner on the ITBs – Flexible fuel hoses made   ^^ Picture shows the splayed cable ends after soldering. It is the splayed ends that give the cable end strength. The solder just keeps the ends frozen in […]

Project Miata Update

Quick update: 1) New air filter backing plate is cut to better position the air filter now that we’ve resolved the AC hose conflict. I feel like we checked this a few times but I’m hoping the Dzus quarter turn fasteners have sufficient fuel rail clearance. 2) 1.6 lower radiator hard pipe offset mounting bracket was made out of steel and painted. This positions the two 1.6 radiator hoses correctly so there is no contact with anything that could wear a hole through. We couldn’t use the OEM 1-piece NB8 lower radiator hose due to conflict with our NA6 AC […]

Project Miata Update

Finally got a chance to work on the car a bit this past weekend. The custom AC hose worked out okay. Initially I was very pleased with the hose routing but when we attempted to fit the ITG filter we still had an interference due to the service port so we ended up with a final routing that is not as nice but gets the job done. We made use of existing body holes for securing rubber coated p-clamps and we made one custom bracket. We installed new o-rings and pulled a vacuum on the system that held at 29.9″ […]

Project Miata Update

I went to a friend’s workshop and he helped me bend up some 1.25×0.065 aluminum 6061-T6 tubing for some prototype coolant hard pipe to replace the really long rubber return hose with internal spring that ships with the M-tuned coolant reroute kit. The hose can be a pain to fit onto the radiator with the internal spring that keeps the hose from collapsing. And once again, packaging was a bit tricky as the flexy rubber hose could rub against the throttle bodies, alternator, fuel hoses, and/or body, which would wear a hole through and create a leak. You don’t want […]

Custom Air Conditioning Hoses for Custom Mazda Miata Applications

Here’s an idea of how some of the V8 Miata guys have done it. Instead of coming straight off the firewall, mine is going to bend down and away from the motor before looping back. Here’s hoping there is enough flex in the 1″ OD, 0.5″ ID #10 barrier AC hose to do that. I really would have preferred a 45┬░ fitting at the firewall but none was available.     Operation: I want Air Conditioning in my LS!