slo

iTrader: (1)

I have a several questions regarding the 13B-RE in an FC swap; I searched on the topic extensively, and found allot of good info, and some conflicting info. If some of these questions seem poorly researched, there not, I just want to confirm a few things before I spend any money on something that can’t be used.

What year turbo water pump housing (and pump) fits, on the COSMO motor, and provides outlets in the right places for the turbo?

Is the rear Mazdatrix SS oil cooler line, long enough for the 13B-RE, if not is there a set of off the shelf lines that will fit?

Will FD down pipes (like the 70 dollar SS ebay ones) bolt to the stock COSMO turbo, and clear the frame?
(yes I know the rest of the exhaust would have to be created behind it, but it seems like a good starting point for a system)

Does anyone know where to find replacement gaskets for the 13b-re intake manifolds?

Is there any tangible gain from using an aftermarket FPR and fuel rail?

So far I’ve sorted out that modified bosch1600cc secondary injectors will fit into the stock fuel rail, and picked up a WALBRO pump. Then the Stock FPR gets plugged into a manifold port so it can be used as a RRFPR. (Is this correct?) And are any other hard parts needed for the fuel system to support 300 BHP on the stock turbos (not counting the ECU)?

Thanks for any help.

BklynRX7

Did you see this site? > http://fc3spro.com/TECH/SWAP/COSMO/13b-re.html

Its a great site for turbo rotary info and answers most of your questions.


the only one it doesnt answer is the gaskets and fpr.

So far the few peopel ive known with a 13b-re cut their own intake gaskets(you can buy the material anywhere)

Youll have to wait on someone else for the FPR answer.

rx7onfire

iTrader: (10)

You can buy intake gaskets off of ebay, and I think you're going to have some trouble getting 300 to the wheels with the stock turbos, they are pretty small. You might be able to get 300 at the flywheel. Are you using a standalone?

GUITARJUNKIE28

this might nelp a bit:
http://www.teamfc3s.org/forum/showth...threadid=47015

an fd downpipe has 4 bolt holes, the cosmo has 3. use your cosmo outlet and have a muffler shop make you a downpipe. it's easy and cheap.

s4 or s5 water pump will fit, but not if you're using the twins.

if you're using twins, you're limited to either an fd or cosmo pump. either way, you're going serpentine, since the pumps rotate the opposite way.

ebay has those power gaskets for the cosmo for around $40-50

no tangible gains in replacing your fpr... you don't need to think about that until you're in the 400hp ish range.

hit me up if you have any more questions. i've done a few of these swaps and learned a lot.

slo

iTrader: (1)

Thanks allot for the info, You've allready saved me some hastle and money allready.

I mean 300 to the flywheel, I thought thats what Base Horsepower meant, really I would be happy with 250. I havn't yet purchased an EMS, but I'm not going to screw with a stock ECU. I'm still picking one out, trying to decide between a new E8, and a budget job, like a used E6K. I'm leaning tword the E8. I've never tuned any kind of aftermarket efi setup before, but I'm looking foreward to the experience (picked up an LM1).

Are you sure the cosmo pump rotates the opposite way? I've heard the FD pump does, but here is a picture of the cosmo pump and belt and it looks the same as any mazda motor I've ever seen.

Thanks again for the help, I was 2 seconds from clicking buy it now on the ebay FD downpipe.

ggoldfingerd

iTrader: (1)

You can also get gaskets from www.mazdatrix.com, I bought the FD LIM gasket. I also bought the gasket between the lim and uim, but I don't know if it will fit correctly (parts store has gasket paper, you can buy a roll cheap). I compared my old on with the pictures on mazdatrix website. I have an fd pump on mine, it barely touches the stock twins. I had a problem with my stock fpr not keeping enough fuel pressure in the rails, so I upgraded to an aeromotive and made my fuel rails parallel. I did install 1600cc secondaries (after market fuel rail) at the same time as the fpr mod. I am currently rebuilding mine and putting a gt35rs kit on.

I will be posting a thread my rebuild with lots of pictures, just haven't had the time yet. My cosmo tt has two studs for the dp, not 3 or 4, so I made a two hole dp, that mated with my 3" two hole exhaust system. I run an E6k with my setup.

slo

iTrader: (1)

If I'm not mistaken the two stud pipe which connects to the turbo's is the downpipe.
Mine defanatly has a very short 3 stud to 2 stud downpipe, this probably connected to the factory pre-cat.

The FD gaskets look slightly different in the picture's, search ebay for cosmo power gasket, they sell one for the FD also. I "think" the cosmo manifold has considerably larger ports than the FD manifold. The no pistons forum has side by side pictures.
Have you had the car running? How do you know the problem was the FPR? Multiple FP gauges and a compressor?

RETed

You're right; he's wrong.
The Cosmo stock water pump turns the same way as the FC 13B's.
Only the FD 13B-REW water pump turns the opposite way.



-Ted

slo

iTrader: (1)

I don't care about being right, I just don't want to find out I'm wrong by wasting a bunch of money, or just as important time.
With that said, Will a stock FC water pump fit the RE housing and line up with either the cosmo belt system, or the FC belt systems?

And whats with the 2 TStats on the cosmo motor? Will the FD TStat housing fit the cosmo motor?

BklynRX7

Dude read the thread i linked you to at the top of the page, its the 1st reply. Heres an exerpt:

Cooling System
The stock FC3S radiator is borderline for this project. You can also retrofit an FC3S 13BT water pump housing, water pump, and thermostat housing to replace the odd Cosmo 13B-RE units; it's easier to find replacement belts, since the Cosmo 13B-RE uses both serpentine and v-belts. If you're keeping the stock Cosmo water pump (housing) both upper and lower radiator hoses might need to be addressed, as water pump housing outlets are slightly different.

BTW thats RETED's site.

slo

iTrader: (1)

Dude


I read the link long before I started this thread.

This is what I meant when I was talking about conflicting information.

I found this same info from no less than 2 other web sources, so is it true or not, because I am using the stock twins, for the time being.

Honestly though thanks for the info.

CyborgRyu

iTrader: (8)

Is the throttle bodies interchangable on a S5/Cosmo motor? I'm asking because wouldn't it be easier to use the s5 t2 throttle body, throttle cable, and throttle position sensor? (of course with a aftermarket ecu, not stock or s5)

slo

iTrader: (1)

I'm pretty sure there not interchangeable, but why would that make it easier even if they where?

CyborgRyu

iTrader: (8)

because you wouldn't have a clearance issue with the hood for the intake before the throttle body.

i was told the throttle body from a 13bt is too small.

Does anyone know if stock s5 turbo manifold bolt on 13BRE block?

BklynRX7

Im almost positive it wont(not without an adapter anyway), and even if it did im sure it would be a bad idea/huge waste.

slo

iTrader: (1)

Maybee the FD spout, or an aftermaket one intended for the FD would bolt onto the cosmo TB?

BklynRX7

NP, i wasnt tryna be rude BTW.

What do you mean by spout?

CyborgRyu

iTrader: (8)

I'd like to hear from some where with the motor that has tried please. Thanks for your input though.

slo

iTrader: (1)

I was talking about the intake elbow that attaches to the throttle body. This piece:
http://cgi.ebay.com/ebaymotors/1993-...spagenameZWDVW

slo

iTrader: (1)

Upon looking at the picture, it would clearly not bolt to the RE throttle body. Sorry bad sugjestion.

ggoldfingerd

iTrader: (1)

The fd elbow will not fit, the fd tb will not fit unless you make an adapter. I do not know if the 13bt tb will fit, I have heard it will not and that its smaller. I have seen a picture somewhere of someone cutting the re snout and making it shorter. I am almost tempted to use the fd throttle body, the secondaries are bigger. For now, I am going to run the re tb and the snout. It looks funny, but it works.

The fc radiator works ok, my engine didn't have overheating problems, but if you are going to push the motor, you should get an aftermarket radiator. I said earlier that I had an fd water pump, I ment an FC.

slo

iTrader: (1)

Hey ggoldfingerd Which FC (S4 S5) waterpump do you have and to be clear you mean waterpump and pump housing correct?



I have a new Koyo in my parts box,

ggoldfingerd

iTrader: (1)

I don't know, I will look at it tomorrow. I don't know if this will help anyone, but here are a few pix of the re tb and rew tb. The first two are for the re and last two are for the rew.