I was really looking into this swap, and it's just not worth it. You'll get more power out of a BP swap (if you don't already have one) with a lot less money and hassle.
That being said, there's a guy in central Florida with a 13b swap in his NB and it took him a solid year of week-end tinkering.
I say do it.. if you like messin with cars (which most of us should) then you should't mind some tinkering. Just make sure its not your daily driver. If your planning on having it any time soon and having it reliable on a daily basis, forget about it.
I'm looking into doing a s5 swap also. You'll get the usual "use a search under rotary" on miata.net. If you can do the work yourself it's fairly cost effective. Use a TII transmission and diff. if you plan to go high hp.
Use a s3 oil pan backwards and a s3 front cover. The big concern is getting the transmission level with the diff. You may have to notch the front k frame also but it will fit and line up without any firewall or tunnel cutting.
Turbo requires more work to fit in all the turbo goodies.
But an NA with a bridgeport, carb and headers will get close to 300hp and weigh about 60lbs. less than bp.
Not really correct, if it's the car I'm thinking of....
This NB from FL was used by a company (Rotary Miata - web site is dead) as the development mule for a 13b swap kit. I don't know if the kit was ever sold.
The car was under construction for about a year, but not really weekend tinkering.
It had evidently been finished right befor MATG in '04. The owner had put on a big fart-can muffler and it sounded amazing!!
I'd love to get a trashed 90 or 91, flare it and put in a 13b turbo. That would be fun!
Not really correct, if it's the car I'm thinking of....
This NB from FL was used by a company (Rotary Miata - web site is dead) as the development mule for a 13b swap kit. I don't know if the kit was ever sold.
The car was under construction for about a year, but not really weekend tinkering.
It had evidently been finished right befor MATG in '04. The owner had put on a big fart-can muffler and it sounded amazing!!
I'd love to get a trashed 90 or 91, flare it and put in a 13b turbo. That would be fun!
Hi guys.
Really enjoying the JRCAI on my NA6.
Makes so much difference between 3 and 5 thousand rpm.
Shame I can’t upgrade the throttle body or inlet manifold.
Sent from my iPhone using Tapatalk
So this idea/rant/project is the result of having too many parts and resources laying around:
Let me start off by saying that I run an automotive machine shop, have been for a few years now, and kiiind of know what I'm doing. I've installed dry cylinder sleeves many times, and have the...
Good Day All:
As is often quoted, “Enter at your own risk”. Do NOT send your transmission to ManTrans (www.ManTrans.net or www.ManTrans.com) in Tallahassee, Florida.
After speaking with Cindy Allen of ManTrans, I sent them a 65K mile ZF 5-speed transmission for a rebuild just to make sure it...
Hey dudes/dudettes,
Figured i'd pimp out a friend's product as an alternative, especially for those of us using NB triggers so we're locked into using $350+ cam gears previously...
A forum community dedicated to Mazda Miata MX5 owners and enthusiasts. Come join the discussion about Mazdaspeed performance, modifications, troubleshooting, racing, maintenance, and more!
Feffman · updated 
Miata2nv · updated 
concealer404 · updated 
