driftaholic

I've seen aftermarket FD setups made to work on the FC with a spacer, what would I need to put some FD twins on my FC?

truespin88

It is generally understood that you don't want twin turbo if you can run a comparable single. Singles are cheaper... just like single exhaust vs. duals.

driftaholic

I want a good quick spooling setup with good top end and I know that fd twins are a decent setup for that. beside I can get a set cheap.

mazdaspeed7

search!!!!!

to make a long story short, no matter how cheap you get the turbos, its not worth it. Theyre not good enough to justify all the work necessary to make them work.

driftaholic

I did a search to no avail.

Anything has to be better then a stock s4 POS

Mr. Gadget

Adam is right on both accounts. I found everything searching, you too can do the same...

Its just not worth the hassle. You have to ask your self why many FD guys to a double to a single mod anyway.......

mazdaspeed7

There needs to be a mandatory course in proper use of the search function prior to being allowed to post here. Use a little common sense when searching, and you have the knowledge of this whole forum only a few keystrokes away.

NZConvertible

I don't agree. The fact that the FD makes ~28% more power than the S5 with only 1.5psi more boost means they obviously have a lot more flow potential. If you can score them cheap and have the skills to do the plumbing yourself (not that big a deal) then you'd have a resonably substantial upgrade over stock.

This is not be a project for an amateur, nor would it be worth sinking a bunch of money into, but under the right circumstances it would be ideal for someone interested in the more useable power a pair of small twins offer compared to a big single. Not everyone here is shooting for 400hp.

mazdaspeed7

But when you get to that level of fabrication, there are other turbos that can be had used that would make more power for the same, if not less work.

j200pruf

iTrader: (4)

Didn't the FD also have a bunch of improvements like its intake manifold and porting that would add some power as well?

Mr. Gadget

Yes they did, the project can be done, the return (HP/$) will suck. Many more mods that will yield a higher HP/$ return.

NZConvertible

Name them.

IwannaFC

lolol hey driftaholic i love your sig banner!! the gaijin part. yea anyways, bigger turbo usually = more lag but higher end power. twin setup=less lag but once you want more power when your running ur turbos at there limit, its gonna cost you to get 2 larger turbo + youll prolly want to go back to the single turbo setup with a bigger turbo and then all the money you put into the twin setup would be lost. you could just do a t4 hybrid?? my .02 cents -alex

neevosh

You wouldn't be able to run them sequentially without a lot of work, if at all. Non-sequential, my FD was making about 300RWHP at 12psi, with full boost around 4000 RPM. That was with the cat still on there.

I don't think it's worth it. You'd have to make an adapter to bolt on the manifold, custom DP, oil lines, coolant lines, IC piping, intake. PLus, they put out a lot of heat.

$150FC

i have talked to bryan (BNR) about putting the FD Stage 3 twins on my car. if the setup wasn't $2k+ i may have gone with it. it's doable, imhmfo.

driftaholic

I heard about the 70+ vac lines that operate the seq. I would have to run them as twins instead. I can get a fd setup cheap. I think I am gonna do it just to do it, for the sake of saying it can be done and what the benifits are.

1BadassRevvin7

stay single

walken

iTrader: (6)

The only reason I could see doing this, is to save money on a waste gate, I've thought about it, just can't get it to work out better than going single, and you can do all that for about 4 grand, if you've pushed the turbo you have as far as you can go.

walken

iTrader: (6)

This is what you need!

http://babelfish.altavista.com/babel...on%2Fb45798333

walken

iTrader: (6)

Or one with everything

http://babelfish.altavista.com/babel...on%2Fe33141383

zyounker

See, i have been looking at doing this too..


Do you even need a spacer? i would think you could just grind off the bottom of the manifold where it would hit the dowls on the S4-S5 motors?

Then take out the flaper doors and weld the holes shut.


It will act like a single turbo but is cheap.


the stock twins have made 400rwhp at the very limit. So 350RWHP is pretty easy to come by.


The other option you should look at is just an upgraded compressor on the HT18 stock turbo. This could get you ~350rwhp and still be cheap without the need to make the IC piping. (but you are still gonna need to upgrade the IC.

driftaholic

but the wastegate is better on the FD

ludeowner

Just from reading that I'm guessing that you want to run the FD twins in sequential mode. Like somebody already mentioned you'd have to do a lot of work to get it running in sequential mode.

So to make it easier on yourself you could run it in non-sequential (NS) mode. But you'd probably be doing the swap blind since not to many people (maybe no one at all) have done the swap.

Unfortunately, by going doing the NS conversion, you dont have the quick-spool that you were looking for.

NZConvertible

He's already said he isn't.
Why do you think this would be any more difficult than any other turbo swap? Once you have them mounted, everything else connects up the same, just twice over.
Yes you do. Two small turbos will always spool faster than a single turbo with equivalent flow. Sequential is better again, but everyone here seems well aware that this isn't possible without the factory ECU.

Sesshoumaru

iTrader: (1)

how do you control the turbo pre-spoo and the turbo transitionl?

What i'm saying is there are things that are computer controlled (rpm based).

I'm interested how they got the twins to work in sequential mode on a 13b.

Running non-sequential is a LOT easier.