M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

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m2cupcar
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M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by m2cupcar »

Sunday, April 26, 2015 (aka Monday in Kiwi-land and Public Holiday) FreeEMS engine number 35 came to life. Thanks to the FreeEMS community. Couldn't have done it without the support!
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Yep- that's a Mac running a Win 7 VM for EMStudio/tune, EMSloader-- and ULV running in Java in Mac OS. Zero issues there. :)

Owner: Rob
Make: Mazda
Model: Mx-5 Miata
Engine: FE-dohc (FE3)
Capacity: 2.0L
Power Adders: old skool Garrett T3/T4 AR70/63
Firmware: FreeEMS-0.2.0-SNAPSHOT-288-gc2a0282-M2CUPCAR-MitsiAndMazda-CAS-4and2.s19
Hardware: old skool Jaguar A3
Description: All DIY baby
DIYEFI Build Thread: viewtopic.php?f=67&t=2119

Engine fired up on the second try after boosting the lower VE zones ~40%.

First start video:
https://www.youtube.com/watch?v=F5eNhSxHWKs

First start ULV log screenie:
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Jaguar A3 in spacious stock Mazda ecu chassis:
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There's enough room in there for two Jaguars! freeemspnp?

Still lots to do, but it runs!
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90 Miata | 302rwhp @ 6450rpm | 281rwftlbs @ 4800rpm | FE-dohc 2.0L turbo
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by Fred »

Awesome work, Rob! Super proud of you sticking with it and coming up with that great video :-D Looking forward to further vids with more exciting content ;-)
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by masterkorp »

Great work ! Congratulations. I am jealous !
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by ToxicGumbo »

Congratulations! Great to have another brother in the FreeEMS family.

Also, nice job with the OEM ECU case fitment. Looks slick.



-Jeff
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by DeuceEFI »

Good work Rob!
And welcome to the FreeEMS family :)
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m2cupcar
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by m2cupcar »

The car is running and officially driving, though hardly tuned. Took it for 5 miles in stop and go traffic, full sun, Atlanta summer heat @ 96f. Essentially untuned. No drama. Posts to follow on how I arrived at this drive.
90 Miata | 302rwhp @ 6450rpm | 281rwftlbs @ 4800rpm | FE-dohc 2.0L turbo
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by m2cupcar »

Built downpipe and external wastegate dump pipe.
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90 Miata | 302rwhp @ 6450rpm | 281rwftlbs @ 4800rpm | FE-dohc 2.0L turbo
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m2cupcar
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by m2cupcar »

Created a new dipstick/tube and water pump mixing manifold. Had to move the dipstick forward to make room for the wastegate dump pipe. The wp manifold makes a 90 and runs directly over the AC compressor to avoid the AC compressor belt/tensioner.
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90 Miata | 302rwhp @ 6450rpm | 281rwftlbs @ 4800rpm | FE-dohc 2.0L turbo
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m2cupcar
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by m2cupcar »

Used a Volvo cooling fan circuit/relay with a fat ballast resistor to run my Spal 16" 2800cfm fan a two speeds- low for engine cooling and high for engine cooling + AC. FWIW I picked up two of these volvo fans (swept blade 16" 3000cfm Seimens) with full wiring harness including relays at pull-a-part for <$40 US. Unfortunately the volvo fan is just too thick to fit in the Miata engine bay without rearranging the sway bar mounts.
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90 Miata | 302rwhp @ 6450rpm | 281rwftlbs @ 4800rpm | FE-dohc 2.0L turbo
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m2cupcar
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Re: M2cupcar's 1990 Mazda Mx-5 Miata FE3 Turbo (35th)

Post by m2cupcar »

Fab'd up an AC bracket to mount an 04 Miata/RX8 AC compressor to the FE3. Bracket and compressor weigh more than 10 lbs less than the original Miata pair.

Started with a factory bracket and cut like this:
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Made this with some aluminum plate:
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Final mounting with tensioner:
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Modified the stock Miata AC lines with cutting/brazing/adding RX8 fittings to build custom lines:
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90 Miata | 302rwhp @ 6450rpm | 281rwftlbs @ 4800rpm | FE-dohc 2.0L turbo
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