Fd3s transmission and other questions
 

Before y'all start bashing me or telling me i m dreaming, i have a fully built bottom end and stiffer springs in the head. I got an 8.8 irs with a v8roadster kit. My transmission choice was an fd3s because i could not find a tII. Tranny is at the machinist getting a bellhousing conversion from another 5 speed i had. My question is who ese is running same drivetrain as me ? Second question who else is running and fd3s tranny? Third question, if u answer yes to any of the first 2 questions, how much power u got on it, and did u ever brake one ?

And one more things, i did try to use google :D but... last guy who posted about an fd3s was back in 2012 or 2010 so yeah dont tell me to use google

Most people who are going to the work to swap transmissions these days are going with the BMW option. The FD transmission is a lot more work than the BMW one because of the weirdo pull-type clutch, and the ratios are spaced wider than ideal.

I have an FD transmission, but it's in my FD. :)

--Ian

I got one a year ago for a deal i could not pass on and looking at price wise going to a bmw transmission will run me close to 2.5k compared to the fd3s about 1k.
How much power u pushing ? Do u drag or roll race or just track it?

My FD is stock. My Miata makes 340 at the wheels, but I'm still blowing up 6-speeds, I haven't gone down the transmission swap road on it.

I suggest reading through this thread: https://www.miataturbo.net/race-prep...riences-73618/

--Ian

Red through most of it until i got bored reading. Seams like everyone had their own opinion on gearing but no actual proof of how much it can hold... i dont care about gearing as much as i care about how much it can hold. In fact i like the gears on the fd the fact that 5th is longer which is what i m looking for and besides Ever could be adjusted with the correct ratio in the diff and tire size

DIff & tire size do not allow you adjust spacing between gears.

--Ian

Was talking as far as rpm wise

Nothing fixes shitty gear ratios. Not tire size, not R&P ratio, nothing.

If you dont like them doesnt mean they are shitty JS.

I never said I didn't like them. I said they're shitty. It's objective. not opinion.

They are fine for street use. I have the FD box on my car for the last 2.5 years @400whp.

Thank you for a reasonable answer

No problem. I have no doubt that the ratio will suck on the track or at an autox event, however I have no complaints on the street.

Beware though that these boxes do suffer from bad synchros, and if I recall correctly they are double on 2nd and 3rd, so somewhat expensive to replace.

The box itself will let go above 400wtq; the weak point is the shaft, which twists under torque and eventually snaps.

I had the transmission laying around for a year now and thought it would be cheaper putting it in the miata than doing a bmw tranny swap. It will be mostly running on the streets or drag racing so not too worried about autox. Some people were able to put more than 500 tq on them but i wanted to get more info from any guy running it in a miata

400wtq is not an absolute limit, but the more you go above that limit, the sooner it will let go.

Thanks for the input

I wonder if a z32 drive line would be too much work. I only mention it cause they are good for 600 or so HP and they weigh about twice as much. I miss my z32 :(

That would be a great gearbox but probably doesn't fit - it's huge. It's also much more expensive than the BMW gearbox.

Reverant is the only person i've heard of using this gearbox. I'm sure he has his reasons for using it (maybe supply is different in Greece.). In the US, it's not used because we have better options. Try google some more.

I know of different transmission options but as I said on top I had this one already

Is "I already had it" a better excuse to shoehorn a transmission into your build than it is to shoehorn a turbo into your build? :dunno:

Great. So what's the question? Sounds about as smart as turbo-ing your Miata because you had some random tractor turbo laying around.

Clearly you should build your car around your transmission.

The question is for the people running an fd3s transmission, the question is also not related to other transmission options.

If the transmission breaks i could care less i ll just dump more money and get the bmw conversion kit from k miata.

I'll be nice and answer your question:
my cousin had a 93 fd many years ago. Iirc he went through 2-3 transmissions on it. car was just bolt ons but he street raced the daylights out of it (but no track at all). So to me, that's pretty weak.
I mean, if you wanna do things roundabout and waste money and time then sure. Just document it well and take lots of pictures, so we can just link the next guy that's gonna be making the same exact thread in the next few months.

It is if all i need is 500$ to shove it in there if it holds to my power goal ?

There you go thanks for a reasonable answer.

That was answered. We don't do that, because it sucks.

How much less could you care?

$500 all in to run an FD trans. Hahahahahaah how precious you are.

Around how much power was he pushing?

When u have the right connections and the right parts lol yeah it sill cost bout 500$ maybe add another 200 for a clutch disk but that is about it

bolt ons on 91oct. so like 300whp?

I think you'll be a little bit more qualified to drop prices when you've actually completed it.

Here's the thing... turns out i've purchased a clutch for TII/FD application before. It being a good one, it cost about $550, alone.

I should get back the transmission back this week, machinist told me should not cost more than 400$ for bell-housing conversion, already have the what i need to connect the slave to it and all i m missing is the clutch disk and a clutch line

Sounds like you're almost there. Just like the hundred guys before you. Just like every unfinished project for sale ever. "just needs...........and its done"



:D

A clutch disk alone does not get any closer to 550 lol maybe u got it with a pressure plate but i already have act pressure plate, after doing some research an nc clutch disk will fit it just fine

Accounting for the market price of that transmission in good shape, puts you within striking distance of a transmission solution that works well.

Correct.... but do you have an appropriate pressure plate?

Lmao never giving up on my dream.
8.8 kit on the way i got the irs diff in my living room. all i need is that damn transmission and send it to the roller

Yes sirrrr

Sounds great. Hopefully that 1/3rd as strong transmission with 1/4 the shift quality and 1/2 the gearing goodness for 2/3rds the price works out.

How are you planning on bolting the Miata PPF to the FD transmission? Yes, FDs had PPFs as well, but they're a totally different shape and they mount on the opposite side of the transmission. You need transmission & diff mounts, and likely a custom driveshaft as well.

--Ian

Coulda just summed it up with 3 words "just send it"

Correct to all these things, though presumably the 8.8 kit that he's spending a couple grand on has mount provisions.

No pff needed with an 8.8 and nothing metal wont fix. I ll make a tranny mount which is super easy. Already spoke to v8roadsters when i ordered the kit they discounted the price of the driveshaft from total price until i send them measurements so they can make one appropriate for my application and they will quote me a price but could be cheaper or a little more than their original driveshaft that comes with the kit

I like this guy :likecat:

Details schmetails. So what if half the parts needed are missing.

JUST SEND IT

What's the name of your tranny mount?

I got the v8roadster stage 2 kit minus driveshaft

Who cares YOLO

Nah bout jokes aside it is being built right just have faith people

The last time i saw someone attempt this, it was in my old car, and the car got parted out and crushed, as everyone predicted.

ok bro I believe you

Dont jinx me

On a side note anyone wants to buy an 8.8 open diff off of a 97 t-bird?

is it almost pnp on a Miata?

Lol if u have an 8.8 kit it will

$500 and an afternoon of work should handle it.

This thread is direct evidence that you have the wrong connections.

Please elaborate and explain to me how

Don't tell me what to do.