does any one here know if the 13b's kept the same exhaust bolt pattern ie.)will fd twin turbos fit a fc motor?

 

the TII engine and 13b rew are different, you cant swap pieces between the two, and the twins are way out of the question. how would you even get them to work with the TII engine and ecu, short anwser is you cannot. someone would have done it by now and no one has, it would be cheaper to put a fd engine into a fc and that is supposedly harder than droping a 20B in.

 

maybe he doesn't want to run sequential?

even though i don't know much about the FD sequential TT system i think it's safe to assume that if he built some kind of adaptor to put the FD twins on the TII manifold he'd be able to run them??
now at this point he might wanna go FMIC??

 

custom manifold, standalone and 2 turbos........dont try to make the FD twins work.....just get 2 aftermarket turbos.....I know of someone doing this.

edit: and of course you need the oil lines, fuel and the other good stuff.......

 

This has been covered 100 times, and the search button will tell you this.

Long story short, unless you wanna spend a lot of money and time on something that probably isn't worth it anyway, don't bother.

 

I think the exhaust manifold bolt patern is the same because you can use FD rotor housing to rebuilt a 13BT. So if you have the FD exhaust manifold the twins should bolt... I think.

 

The exhaust manifold will bolt up just fine, but will not clear and FC intake manifold. The FDs IM is positioned closer to the block, so you will need a small spacer ( ~1" I believe) to space the turbos out a tad further for use on an FC.

 

thx for the info,BTW the reason i ask is i met a guy at a performance shop who was swapping his twins for a large single, and i was just curious if i could save money on a turbo swap by getting his twins(relatively low mileage), the exhaust manifold and his 2 into 1 turbo IC pipe and adapting them to my current motor. as for the sequential part of it im just assuming i could run a boost controller to each of the wastegates w/ a common/shared "boost" line, so each turbo produces the same boost as the other.
p.s. im a first gen guy and i asked y'all in this forum b/c i figured you guys will know bout 13b turbos better than anybody in the other forums

 

Even though your probably not talking about me, I'll let ya know how it goes in the spring

 

sounds like someone gonna need a couple of extra sets of tires

 

You seem to be stubborn on doing this, regardless of what we tell you.

First, the FD3S 13B-REW twin-turbos will not fit on any FC3S 13B or 13BT with stock lower intake manifolds.
The FD3S 13B-REW lower intake manifold hugs the engine closer.
You need a spacer or something else creative to make them fit.

Second, The FD3S 13B-REW runs twin oil drains.
You can probably fad the front one to the existing 13BT motor, but the rear one needs to be custom made.

You are not going to get the sequential twin-turbo system running "a boost controller to each of the wastegates w/ a common/shared "boost" line".
Go get a diagram of the sequential twin turbo system from the FD3S Mazda FSM.
It is a 3-stage system that uses boost control as the last stage.
One is a pre-stage control that controls a flapper in the turbo exhaust manifold.
Is is not as simple as plumbing in some kinda restrictor valve into the fittings and expecting everything to work.
You really need the stock FD3S ECU to control the whole mess.

You think you're getting a good deal.
I think you're getting yourself into a big mess.
I wouldn't touch a pair of stock twin turbos off the FD3S 13B-REW with a ten foot pole even if they were given to me for free.

Keep us updated on your progress...


-Ted

 

thanks a whole lot ted, this is why i ask here in the forums before i drop a bunch of cash.the explaination helped a lot too, rather than saying "you can/cannot do it" you actually spelled it out for me so i could understand why i shouldn't do it, i guess ill just buy a nice sized single turbo(probably going to be cheaper/more effective anyway).peace