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Old 08-24-2013, 02:48 AM   #1
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Default SR20 swap in NA miata?

hey guys i have been thinking about this for quite a while and have been seriously thinking or doing the sr20 swap , does anyone know what mods are needed to make the sr20 fit into the miata, just take into consideration i am a qualified welder and mechanic so normal engine swaps and metal fabrication is like a walk in the park for me, but putting a SR into a miata is uncharted waters for me, this would be my 3rd different manufacture engine into a separate automobile company chassis, any help and guidelines would be awesome,


Robert
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Old 08-24-2013, 03:36 AM   #2
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Why not skip the bullshit and put a good engine in it if you were going to go through all that trouble?
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Old 08-24-2013, 03:36 AM   #3
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Is you be troll brah?
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Old 08-24-2013, 04:32 AM   #4
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I saw this swap done once before. The owner had to get all custom mounts, oil pan, ppf, exhaust/ic tubing, and a bunch of other **** that I can't remember. It was a long list and a hefty sum though. He ran a built sr20 that made 320wheel...I'd sooner just build a 1.6liter from the crank up. Just my .02.
I do love swaps though, especially crossbreed a like you're talking. If you do it, keep us posted
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Old 08-24-2013, 08:24 AM   #5
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FE3 is the better option, Equal displacement, Can be found much cheaper (KIA Sportage), and can take a good deal of boost in factory form. Also has an easy way to bolt it up to the factory miata trans, or a Turbo II rx7 trans. The oil pan on an SR20 will take a great deal of modification to fit in a miata subframe.
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Old 08-24-2013, 08:40 AM   #6
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Sr20's make good drift cars...u drift bro?
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Old 08-24-2013, 09:25 AM   #7
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personally i like the idea of the SR swap but its really not a worth while swap. the mounts are pretty basic. you will need to make a custom oil pan and pick up to fit around the steering rack. custom drive shaft, custom ppf, and the wiring. the rest is common for any build. IC pipes/ downpipes and a tune. boosting the stock 1.6 or 1.8 can put you around the same base power level for a lot less $ and down time. its what YOU want. be prepaired to figure a lot out on your own. these not much info online.
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Old 08-24-2013, 11:02 AM   #8
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Quote:
Originally Posted by Erat View Post
Why not skip the bullshit and put a good engine in it if you were going to go through all that trouble?
i was thinking of going 13btt swap but im not sure you can run the tt setup because of clearance isues

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Is you be troll brah?
nahh brah im not trolling you i really want to do this

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Originally Posted by doughboy118 View Post
I saw this swap done once before. The owner had to get all custom mounts, oil pan, ppf, exhaust/ic tubing, and a bunch of other **** that I can't remember. It was a long list and a hefty sum though. He ran a built sr20 that made 320wheel...I'd sooner just build a 1.6liter from the crank up. Just my .02.
I do love swaps though, especially crossbreed a like you're talking. If you do it, keep us posted
yeah i would build my 1.6 too but the bottom end can only handle 250 before it grenades unless i can get work done to it or get a stronger bottom end either way i would end up putting the same amount into the 1.6 as i would making the SR fit
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Old 08-24-2013, 12:14 PM   #9
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I'm curious why you would the SR came to mind. It's really not that special.
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Old 08-24-2013, 12:30 PM   #10
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Quote:
Originally Posted by acro 94 View Post

Quote:
Originally Posted by Erat View Post
Why not skip the bullshit and put a good engine in it if you were going to go through all that trouble?
i was thinking of going 13btt swap but im not sure you can run the tt setup because of clearance isues

Why not skip the bullshit and put a good engine in it if you were going to go through all that trouble?

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Originally Posted by acro 94 View Post

yeah i would build my 1.6 too but the bottom end can only handle 250 before it grenades unless i can get work done to it or get a stronger bottom end either way i would end up putting the same amount into the 1.6 as i would making the SR fit
Now I know you're trolling.
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Old 08-24-2013, 12:55 PM   #11
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If you work out the hp per liter, the experienced tuner at the dyno says if I had the 2 liter sr motor I'd have the same power, since I'm running the sr20 turbo. If that makes any sense.

So I agree, either do the fe3, or find a v8 in any truck, van, or v8 powered car in the junk yard and actually upgrade the engine.
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Old 08-24-2013, 02:38 PM   #12
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Will cost way too much to do sr20. If I was starting from scratch I could have a well sorted, fully built bp (brand new shiny motor with 0 miles and awesome parts inside) for thousands less. I wouldn't have the headache of engineering afterthoughts either.

If you're going to motor swap fe3 is practical. Anything outside of the fe3 is going to be $$$ and no return on investment in comparison. power to $ ratio.

That said. BOTTOM line. 400+hp deserves a swap look. ANYTHING below is a waste unless you have time and money to burn.

I always think of sweet ideas for swaps.... then realize new platform... or i need to bust out the special helmet and drool bucket.
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Old 08-24-2013, 03:22 PM   #13
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If you're dead set to put more effort/money/time into an engine swap rather than the commonly accepted routes for power, you should probably do a VG30DETT swap.

I'm just assuming you're a masochist.
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Old 08-24-2013, 08:36 PM   #14
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There was an article from FM regards to FE3 option eh?
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Old 08-24-2013, 09:02 PM   #15
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Isn't the SR motor all aluminum? Wouldn't it be quite a bit lighter than a BP, FE or 13B?
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Old 08-24-2013, 11:28 PM   #16
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I my years of swap research, I came up with this:
If you're gonna swap in something that doesn't belong in a Miata, then it better be an LS V8. Don't waste your time with a Ford 5.0 V8 from the 80's or early 90's....
and don't argue with me about the fact that I just said that, because you will make as much whp and tq and you could with a turbo on a 1.8.
If you have to keep a 4 cylinder in a Miata, then it needs to say Honda on it. F20c, or a K20/24 engine. Don't even think about a rotary, or a SR20, or anything else. It's a waste of time.
2JZ? Here's a video about that:
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Old 08-25-2013, 03:54 AM   #17
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Gotta get ready for race wars.
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Old 08-25-2013, 05:05 AM   #18
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Quote:
Originally Posted by thirdgen View Post
I my years of swap research, I came up with this:
If you're gonna swap in something that doesn't belong in a Miata, then it better be an LS V8. Don't waste your time with a Ford 5.0 V8 from the 80's or early 90's....
and don't argue with me about the fact that I just said that, because you will make as much whp and tq and you could with a turbo on a 1.8.
If you have to keep a 4 cylinder in a Miata, then it needs to say Honda on it. F20c, or a K20/24 engine. Don't even think about a rotary, or a SR20, or anything else. It's a waste of time.
2JZ? Here's a video about that:
agreed! i rode in a ford 5.0 swapped miata once, no thank you.
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Old 08-25-2013, 08:44 AM   #19
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I have my eye on doing an MZR swap. I want it to still have the soul of a Mazda.
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Old 08-25-2013, 09:43 AM   #20
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I agree about everything except the rotary.

A 13b swap would be excellent.

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