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Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 1:03 p.m.

Time to put it in!

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 1:05 p.m.

 

Success!

 

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 1:19 p.m.

The 2.0-liter's intake manifold is reused, though one of its wiring clips has to be ground off in order to clear the 2.5-liter thermostat.

 

Sonic
Sonic UltraDork
1/20/19 1:25 p.m.

What's the deal with the blue Diablo in the background? A Miata shop is a strange place to find that. 

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 1:36 p.m.

It's SoCal, things like that just sort of show up if you leave a building unattended. cheeky

In all seriousness, who among us can't say they've been distracted by a weird car every now and then? That thing is actually a V8-swapped Fiero underneath. surprise

 

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 1:37 p.m.

Good-Win's 1.8-inch primary header is going on now.

Dave M
Dave M Reader
1/20/19 2:44 p.m.

$1500 in labor for this seems extremely fair! For shade-tree level folks like me, this is something I would definitely screw up.

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 3:13 p.m.

And it's time for the intake manifold (leave the EGR tube loose so it can be finagled into the 2.5's slightly different spot:

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 3:48 p.m.

Wiring is going back on:

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 3:48 p.m.

Still on the to-do list: 

  • Install the transmission
  • Install the exhaust
  • Flash the 2.0 ECU with the 2.5 tune
  • Go for a drive!
Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 4:02 p.m.

The 2.0-liter engine's fuel rail and injectors are on the car now, too.

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 4:27 p.m.

Time to go back under the car! We put the stock flywheel back on, both to keep costs down and to dampen the 2.5's vibrations.

We paired a used ACT pressure plate with a new disc, then bolted everything together and reinstalled the transmission and powerplant frame.

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 5:00 p.m.

Next up: Exhaust. Anything that fits the 2.0-liter fits the 2.5, so we're using a Good-Win Racing RoadsterSport system. 

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 5:54 p.m.

Under tray is back on!

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 6:10 p.m.

And the shifter:

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 6:12 p.m.

Cowl trim is back in place:

And the ECU:

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 6:16 p.m.

Time for fluids!

Because the 2.5-liter is taller than the 2.0, but uses the 2.0 oil pan, the dipstick doesn't read normally anymore. In a 2.5-swapped NC Miata, the low mark on the dipstick is the full mark.

 

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 6:45 p.m.

Goodwin is uploading the Xero Limit MX-5 2.5-liter Conversion Tune now:

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 6:50 p.m.

Add some spark plugs:

And coils:

Tom Suddard
Tom Suddard Digital Experience Director
1/20/19 6:51 p.m.

Aaaaaaand.... TIME!
 

It runs! In less than 24 hours, we 2.5 swapped an NC Miata!

NordicSaab
NordicSaab Dork
1/20/19 7:08 p.m.

I love my 2.5L NC. So much that I have a SC that will be going on it soon. devil

dean1484
dean1484 MegaDork
1/20/19 7:09 p.m.

Tom

Thanks for documenting all that!!!!  

stuart in mn
stuart in mn UltimaDork
1/20/19 8:14 p.m.

For us uninitiated people, what car does the 2.5 liter engine come from?

bmw88rider
bmw88rider SuperDork
1/20/19 8:23 p.m.

Most popular source is the Fusion. You can also get it from the Escape. 

wearymicrobe
wearymicrobe UberDork
1/20/19 8:28 p.m.

You guys are right down the street from me. I want to come down and help!!

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