99mx5

I bought a VDO boost gauge and replaced my LC-1 and XD-16 wideband with the new digital MXT-L wideband. I made a panel and installed them in the glovebox.

99mx5

I bought a ball valve to close off the heater circuit so that only cool coolant goes through the engine.

99mx5

I also installed a crankcase breather / catch can.

99mx5

Here is the final engine bay pic after completing the install. It starts spooling at 2300RPM and pulls hard. It is currently limited to 10PSI. I already spent 2 weeks street tuning it. Next step is to track test and tune.

The last part I have to install is the new undertray.

99mx5

Here is the first start video.

99mx5

After street tuning for two weeks and getting cold start, idle and basic WOT run AFRs tuned. I took the car to the local track (Arroyo Seco Raceway) for a test and tune. It was a bit rich at the top, so I leaned it out and all was well. The car ran great for the rest of the day.

Here is a video of one of the race sessions.

99mx5

I have the Forge wastegate actuator with the softest spring (the green 5+ PSI spring) directly connected without the MBC and I still hit 10PSI around 6600 RPM. After the test and tune day at the track, I set the ECU to cut fuel at 175kpa (around 11PSI). I'm hoping that it will allow me to have a little more headroom to hit rev cut before overboost fuel cut.

I also plan to try a softer spring in the MBC to delay opening of the wastegate until around 6 - 7PSI. Due to the quick spool, it's probably unnecessary, but I'm curious to see what the change will be. I'd expect to overboost even more, but its easy to test it.

99mx5

I tested my MBC and found that the bleed hole is too big to allow the wastegate actuator to open. I will reduce the size of the hole and test again.

RedTurboMiata

looks good, any dyno graphs yet?

flying_solo

iTrader: (1)

OK, bookmarking this as I'm going with ARTECH Manifold and full exhaust as well. I spoke with Abe and will probably pull the trigger on mine in two weeks. He talked me into the EFR too!

Now, I have to go back and read every post. Thanks for the cliff notes this is awesome.