DSG transmissions are all the rage, and would be nice for track racing. So I started to daydream about what it would be like to put one into the NA Miata. A couple of things come to mind for hurdles, such as a way to control the transmission, a commonly available transmission in the United States that is also rear wheel drive, and as well, costs on adapting.
any thoughts? Indulge the sick fantasy of a bored guy at work.
Somebody is putting the DSG out of a previous-gen M3/M4 into a Miata. BMW transmission adaptors already exist for the Miata engines.
why stop with the trans when you can replace the low output Mazda motor as well?
nderwater said:why stop with the trans when you can replace the low output Mazda motor as well?
Replace it with what? A massive I6? A humongous dohc v8? Also, NO ONE wants bmw reliability. Miata reliability is bad enough.
RossD said:https://shop.quaife.co.uk/mazda-mx-5-na-nb-60g-6-speed-sequential-gearbox-1831
Yeah, I know about those. Let’s look for a more GRM route. Say, less than 5k?
_ said:nderwater said:why stop with the trans when you can replace the low output Mazda motor as well?
Replace it with what? A massive I6? A humongous dohc v8?
K20
In reply to Slippery :
So how would you mate the k20 to a bmw dsg?
_ said:nderwater said:why stop with the trans when you can replace the low output Mazda motor as well?
Replace it with what? A massive I6? A humongous dohc v8? Also, NO ONE wants bmw reliability. Miata reliability is bad enough.
In what world do Miata's have a reliability problem?
In reply to z31maniac :
Not like bmw reliability, but they have their known issues which require constant attention and maintenance. (Drainage Leaks, interior rattles, caliper lubing, ppf/trans breakage, crank snouts, the Devil’s Heater hose replacement, cas oil seal leaks, etc.)
_ said:In reply to Slippery :
So how would you mate the k20 to a bmw dsg?
Kmiata has a k2x to BMW adapter
Nice. Now we just need a controller for the transmission.
I read a thread a while ago where someone was converting a standard floor manual transmission to flappy paddles using arduino and air or vacuum. I couldn't even begin to guess where it was, but it might be a rabbit hole worth checking out
You're worrying way too much about those Miata "problems."
Crank snounts were essentially solved by late 91. The trans is fine until like 230hp, right about 100 hp more than stock. No shame there. Caliper lubing is standard maintenance for any car with sliding calipers. CAS o-ring is annoying, that's fair. But again, it isn't something you need to constantly maintain.
thatsnowinnebago said:You're worrying way too much about those Miata "problems."
Crank snounts were essentially solved by late 91. The trans is fine until like 230hp, right about 100 hp more than stock. No shame there. Caliper lubing is standard maintenance for any car with sliding calipers. CAS o-ring is annoying, that's fair. But again, it isn't something you need to constantly maintain.
Even pre-'91, the crank issues are overblow. I had one of those supposedly awful short nose crank motors. It had 150k miles on it, bounced off the rev limter frequently and never had an issue. Most crank snout failures are from sloppy mechanics working on the, My transmission was living fine at 245hp with a ton of launches, the only reason it died was a bolt rattled out of the input shaft plate and it ran out of oil, and that had nothing to do with power. It came because someone had previously been inside that transmission and hadn't torqued/loc-tited the bolt in.
"Miata reliability is bad enough." Sure, okay.
Hey fellas want to stay on topic? I meant that BMW was worse as far as reliability than the Miata. Not that the Miata is a horrible awful machine that constantly requires care. It has its normal things that every car has to look after and it has some peculiar things that you have to look after that are the auto specific. Furthermore, I have had to replace and update nearly everything on The usual list of Miata checks and repairs. Whereas, my Toyotas and Hondas don’t have nearly as many issues. So let’s get back to the topic at hand.
_ said:Hey fellas want to stay on topic? I said basically that BMW was worse as far as reliability then the Miata. Not that the Miata is a horrible awful machine that constantly requires care. It has its normal things at every car has to look after and it has some peculiar things that you have to look after that are the auto specific. Furthermore, I have had to replace and update nearly everything on The usual list of Miata checks and repairs. Whereas, my Toyotas and Hondas don’t have nearly as many issues. So let’s get back to the topic at hand.
If you're worried about reliability, why would you even consider using a BMW DCT transmission? And even in the implementation I linked, he will still have to use the clutch for starts and stops Then there is the fact that it weighs more than 2x what a Miata 6spd does. .
And Getrag doesn't sell any replacement/maintenance parts for it, so if it breaks, you need to find another used one or drop $10k on a new one.
In reply to _ :
Well, in that case, you can get flappy paddles in a 3rd gen MR2. That solves all your problems right there. Toyota perfect reliability, top down fun, and an SMG.
Edit: to lighten the mood and come off as less snotty than the above implies: This is GRM. You know we're a bunch of ADD car nerds who can't stay on topic 
_ said:nderwater said:why stop with the trans when you can replace the low output Mazda motor as well?
Replace it with what? A massive I6? A humongous dohc v8? Also, NO ONE wants bmw reliability. Miata reliability is bad enough.
Fair amount of 4 cylinder engines out there now with dual clutch transmissions.
z31maniac said:_ said:Hey fellas want to stay on topic? I said basically that BMW was worse as far as reliability then the Miata. Not that the Miata is a horrible awful machine that constantly requires care. It has its normal things at every car has to look after and it has some peculiar things that you have to look after that are the auto specific. Furthermore, I have had to replace and update nearly everything on The usual list of Miata checks and repairs. Whereas, my Toyotas and Hondas don’t have nearly as many issues. So let’s get back to the topic at hand.
If you're worried about reliability, why would you even consider using a BMW DCT transmission? And even in the implementation I linked, he will still have to use the clutch for starts and stops Then there is the fact that it weighs more than 2x what a Miata 6spd does. .
And Getrag doesn't sell any replacement/maintenance parts for it, so if it breaks, you need to find another used one or drop $10k on a new one.
I didn’t. Someone else did.
Really? Are you trying to get your own thread locked? I know you're relatively new here but we try to not devolve into your typical internet forum name-calling and general trash behavior. Keeps the forum nice and friendly, you know?
Can you please tell me how that term does not apply to this scenario?
And I could care less if this thread gets locked, it was full of no answers and a bunch of bullE36 M3
You're right, quoting "retard" at someone online is totally innocent. Good luck with your transmission swap.
Stick around if you decide to chill out, there's a ton of good information and great folks here.
So yeah, your personality aside, outside of the BMW option, there aren’t likely to be any other options that would fit the Miata. Let alone the NA.
BTW, the 6-speed auto in the NC is actually a decent piece. Flappy paddle upshifts, allows some brake standing at the lights, blips the throttle on the downshifts.
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