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-   -   99mx5's ARTech EFR build (https://www.miataforumz.com/build-threads-46/99mx5s-artech-efr-build-831/)

flying_solo Apr 17, 2012 08:17 AM

Damn you guys all move fast! Want to rebuild my bottom end next? I takes me weeks to just change my oil.

99mx5 Apr 17, 2012 12:02 PM

Thanks for the comments. I did all the disassembly/assembly work myself aside from the machine shop stuff. The reason for the quick turnaround is that there is an upcoming race event at the end of the month that I must attend in order to keep up with points.

flying_solo Apr 17, 2012 02:21 PM

What you didn't say was "sure I'll rebuild yours next Sunday if you ship it to me." :)

Good luck getting her track ready man, but it doesn't look like you need luck.

99mx5 Apr 17, 2012 03:04 PM

If I say that, it would be the second engine I would build. ;)
Thanks! I plan to recalibrate the O2 sensor and reprogram the MTX-L wideband to the standard LC-1 parameters of 0V=10:1AFR and 5V=20:1AFR

99mx5 Apr 18, 2012 03:02 AM

2 Attachment(s)
I just went out to break the engine in. I used the FM break-in method. The engine runs smooth and feels great. I disconnected the coils and cranked the engine until I got oil pressure before starting it. So far, so good. I haven't found leaks of any kind.

flying_solo Apr 18, 2012 07:21 AM

Done correct on the first try? WOW. Everything takes 3 tries with me.

99mx5 Apr 22, 2012 04:45 PM

So far so good! I have been driving the car as my DD. No leaks and no problems. I have made some changes to my timing and fueling for safety's sake. I have also re-installed my boost controller as I can hear the forge actuator opening up at 5PSI.

RedTurboMiata Apr 22, 2012 06:19 PM

how did your after rebuild track event go?

sixshooter Apr 22, 2012 08:12 PM

Details please! How's it going?

99mx5 Apr 22, 2012 10:25 PM

The next track event is this coming weekend. So far so good. I really want to dyno it first, but it looks like it may not happen. I plan to dyno it soon. The car pull hard and idles well. There's no smoke and it has good vacuum.

I tried reprogramming the wideband output range to 0-5V, 10-20AFR to see if I can get it to match the MS in Tunerstudio, but it was always a point off in the software. I set it back to default then tweaked the lower AFR value in TS and they do match now. The default values for the MTX-L is 0-5V, 7.35-22.39AFR. I set it as 0-5V, 6-22.39AFR in TS to match.

I have the boost controller set to open at approximately 10PSI. I may have to tweak it some more and/or install a softer spring in the MBC. I am currently using the softest spring in the Forge actuator. I have the rest of the spring set ready to use if needed.


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