13b NA swap

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Old 12-06-15 | 04:53 AM
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Shawnp1989's Avatar
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From: Las vegas
13b NA swap

Good Evening!
My name is Shawn. I am 26 years old and reside in Las Vegas, NV. I have NEVER been a fan of rotary engines due to the fact of them having a "bad rep" but now that i am researching them; they seem pretty decent :]

I understand the "concept" of how they operate, but in theory, i have no clue what the **** i am doing when it comes to them.

I picked up a 1994 Miata for a ridiculously low price...... and now, the other day, i picked up an N/A 13b for a price that i could NOT turn down. People are saying its an s4?..... no clue what that means. I do not know the year it came out of. I scored it for $100. TONS of oil/sludge all along the outside of it, looks as if the rear main seal is done for. I have not ran a compression test yet because i don't have access to an rx7 bellhousing, however, the engine seems to be putting out some hefty puffs so im assuming its all good. Only time will tell.





I am familiar with what goes into an engine swap as i have a v8 miata right now that i am twin supercharging. The swap will not be the issue here; it is getting familiar with the engine.

This was my old chassis with the naturally aspirated v8:
VIDEO:






And this is the new chassis where i am twin supercharging it:







Plans are to turbo it with e85/meth to keep egt's down. I have a Garrett VGT gt37 if i recall that i can use on it. Getting the VGT solenoid to work properly will be the issue. I want to run a Megasquirt unit just because it is financially friendly. This will HOPEFULLY make it possible to control the VGT via TPS sensor [potentiometer], however my throttle body doesn't have one..... I was looking online and some do, some don't..... again i will have to get familiar with the engine.





Modifying the subframe shouldn't be too big of an issue. Cut, box, tube the front and rebuild the steering rack mounts.

I will need to cut a little bit of the oil pan and rebuild it for clearance i think.

As for engine mounts; I was thinking about solid mounting it, but peoples opinions have swayed my decision a little bit and now i will probably run some poly mounts.

Adapting the miata's transmission will be easy; all i need to do is get ahold of an RX7 bellhousing and mill the miata's input shaft because from what i read, the splines are a little too long.

As for the car..... I got the car with intentions to part it out, but i began to bond with it, chop it up a little bit and started to fall in love lol. In the end, i decided to keep it. It SHOULD be ~1600lbs with a full tank of gas and me inside of it. It will be literally a rolling cage; something a little like this:




Here is the current chop on it as it sits today:






I have TONS of questions; just no idea where to begin; so i'll ask as we go. Ill update the build whenever new things happen with it. I will also provide a bunch of pictures for help with other builds.

I hope you guys enjoy the build and im looking forward to speaking with you!
Old 12-06-15 | 08:46 AM
  #2  
misterstyx69's Avatar
Retired Moderator, RIP
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From: Smiths Falls.(near Ottawa!.Mapquest IT!)
That Miata is just wrong!!!...Mwuhahhahahaa!
I LOVE IT!
Old 12-06-15 | 08:58 AM
  #3  
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From: Mile High
At least bodywork won't be getting in your way.
Old 12-06-15 | 12:10 PM
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Shawnp1989's Avatar
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From: Las vegas
Thanks!

Yeah bodywork sucks. Lol



Anyways, i started to tear both my miata trans apart and the rx trans apart; swapping bellhousings and modifying the miatas input shaft.


Old 12-06-15 | 08:38 PM
  #5  
13.bREW's Avatar
dont kill the cones
 
Joined: Dec 2004
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From: Kennewick, WA
WOW!! awesome I hope you can get this all together. and that wing LOL that's legit.
Old 12-10-15 | 12:51 AM
  #6  
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From: Las vegas
Alrighty, moving along i decided to being the oil pan.

I chopped a good amount off for subframe clearance and build around the pickup and drain? i think thats what it is.

results aren't perfect, but im able to work with it..... i figure if i cut a tad bit off the drain, i will have a little bit more clearance for the steering rack.











http://i418.photobucket.com/albums/p...psv3xscspa.jpg
Old 12-10-15 | 12:52 AM
  #7  
Shawnp1989's Avatar
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From: Las vegas
Alrighty, moving along i decided to being the oil pan.

I chopped a good amount off for subframe clearance and build around the pickup and drain? i think thats what it is.

results aren't perfect, but im able to work with it..... i figure if i cut a tad bit off the drain, i will have a little bit more clearance for the steering rack.












Old 12-11-15 | 12:00 AM
  #8  
Shawnp1989's Avatar
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From: Las vegas
well, i finished up the oil pan..... good enough to get it brazed and jbwelded.

the legitimate welder cant come fast enough

*please excuse the shitty welds*






















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