[SLO NIZ]

Ok, i've just throwing out the twin turbs as i keep having solenoid probs with em as you do and now in the process of putting a single turbo from the earlier FC model rx7. Good idea? My mods are 3" straight thru exhaust with no cat, filter and a fresh stage 2 rebuild. I get my car back 2moro with the new single setup and my tuner said i could drive it around like this for a while but i should definatly look at gettting a pfc or microtech soon. The question is if this single turbo setup (i understand its a cheap way of goin single but hey) how long could i drive it around like this for and even after i get a ems will i need a bigger fuel pump or fuel pressure reg? Thanks. Note im not looking at huge power cos i understand i cant get it with this setup but just good daily driver grunt.

artguy

honestly man...you are going about this all wrong. good luck. your mechanic should be fired.

get the right kit for your car, get the ecu and other support mods you need. install, tune, and be smart. penny pinching on a modfied fd and driving your car (any boost at all) with sequential maps on a single kit will not be healthy without tuning. on the rich side you will foul plugs it will run like ***...and on the lean side yer toast. new motor.

[SLO NIZ]

Hm,... He has done quite a few of these single turbo setups before with no probs and he has built the quickest rotary in New Zealand. I dunno.

Battyboy

Umm bro if you don't have a EMS I wouldn't even drive it especially when you've just spent money on a new rebuild. How do you know whats going on? wait till you get an EMS.

[SLO NIZ]

Yes you guys are completely right i dont know whats goin on but, he's done quite a few of em like that and they've all gone fine some ppl have even just left it like that without getting a ems, Im only goin to be driving around in the weekends for a few weeks to about a month at the most.

Battyboy

I woudn't even risk it, but thats me. What was the reason for the rebuild? Engine blown? Just curious.

[SLO NIZ]

Fucked rear rotor. I bought the car out in titirangi a few months ago for $16k like that, at the time i thought i was pretty cheap for a 96" so i thought ah well if i need a rebuild it'll still cost a bit less than getting one thats ok cos atleast i've done the rebuild. I might actually just leave it in the garage till i get a pfc, you know Tony Bateson at Rx7 Heaven? He did my rebuild and he's doin the single turbo for me right now, should be picking it up today.

Battyboy

Yeah I had my first FD serviced by them a couple of times. Pricey. Decided from that point on to do all my own work.

dgeesaman

iTrader: (7)

Well, you're working with a competent tuner/builder. But still should ask 1) what will prevent you from running lean, and 2) if he'll rebuild it again for free if his advice doesn't work.

Dave

RotaryResurrection

iTrader: (8)

I'd like to see pics of the FC turbo install...as well as your impression on it's power.

Even with teh stock ecu, going with a single from an FC shouldnt cause you a problem. The thing isn't a ton bigger than ONE of the stock twins...granted it will flow better than ONE twin, but won't flow as much as BOTH...so you should certainly be safe. They run 6psi stock, so you'll need a boost controller to even get stock levels of power out of it at 10-12. Most FC turbos with stock turbo running 10-12psi put down 210-250rwhp depending on mods. This is no t78 here people...

KevinK2

Assume you are usiing the later turbo, w/o the flapper.

Lean running more likely due to your open exh and stg 2 porting.

May be ok at 8-10 psi. Likely most responsive FD single! Verify with wide band testing, a higher pressure fpr may be all that's needed, if boost is kept down.

Bone-yard single.

RotaryResurrection

iTrader: (8)

I dont see how you guys can say that an FC stock single will move more volume of air than the stock FD twins and cause problems. The FD makes 245+hp @ 10psi with stock twins, and the FC makes ~200@8psi with stock single. Going to 10psi on that same single usually yeilds 210-220. True, the injection control on the FC is not quite as advanced as the FD, but the volume of air the twins move is what makes the power. An FC turbo is smaller than the FD twins in this light. I think some of you hear the words 'single turbo' and automatically think of a 3-400rwhp beast.

Black97VR4

Yeah I was say that the FC turbo isn't much compared to the twins. I don't know why you would want to lose so much power though. If you hated the twins so much then just get your mechanic to set them up non sequentially and still have the potential for 350 - 400rwhp.

[SLO NIZ]

I'll be gettting it back this afternoon so yeah definalty be posting some pics up of it, he said i cant boost too much on it without an ems s he's goin to put a restrictor plate or even a external wastegate as well if the restrictor plate cant get the boost levels around 10-11psi max. Well Tony reckons with fine tuning after i get a pfc or microtech i should get 320 horse but i really dont know, suppose all i need to do is run it on the dyno when the time comes. CHeers.

RotaryResurrection

iTrader: (8)

IF it is a stock FC turbo then it will not do that well, IMO. I'd look for 275 max. Anything over about 12-13psi is just extra heat from that turbo...

Rhode_Dog

What about one of the BNR upgraded FC turbos?

artguy

another pos fd to add to the list....

rpm_pwr

Sadly, it's a relatively common downgrade here in OZ. The problem is a lot of workshops down here don't have a clue about sequentials (or anything about FD's for that matter) so they convince customers to go to a silly little turbo. They generally dyno worse than a stock FD with FAR less low and top end torque. Because of that, the stock ECU actually copes fine.

EpitrochoidMan

WTF, I mean...um...WTF

That setup makes no sense at all.

artguy

people cheaping their way out is all....at least they arent in the states doing that ****...we have enuff beaten fd's here.

Battyboy

What have you done with the twins?

DaiOni

after reading the first page I was about to post, but rpm pwr has said exactly what I was about to say.

All I'll add, is (1) that option 2 magazine ran a (300-350hp) power upgrade guide last year - with the FC, the first thing they did was get rid of the factory turbo (says a lot). Some of the high-flowed versions pull some okay numbers, but still...

Smells like an all too familiar 'too hard basket' solution

(2) the cost of turbos from mazda is most likely what has been the driving force behind these shitty 'up'grades - but nowdays you can get some pretty cheap factory twins (or even older big single) deals, second hand and rebuilt, from japan (for reasonable $$$) - there are plenty of people (low-fi parts importers) out there now who cater to o/s markets - that's what I would have done

180sx-x

ive seen this before..the second week the guy had it he had engine probs..not a very smart thing to do,,the FD is a highly compliocated machine, wich is why it isnt cheap to upgrade, always go high quality..the FD is a high quality car, it needs high quality parts..

SlingShotRX7

Why?? why?? why????

Why not just make your stock twins, NON SEQUENTIAL????

makes no sense on downgrading your turbo and make less power.

Not understanding the logic

Flybye

Yeah, the factory twins are good for only about 350rwhp still in sequential mode.

People get into the 11s with the stock twins still in sequential. That must not be very fast for you then.

Either you or your mechanic need to get the factory workshop manual, and STUDY it.

At least tell your mechanic to log on to the forum. We got a few old threads floating around which give specific details on how to diagnose the sequential system.

There is a 90% chance there is NOTHING wrong with your turbos. Percentage is being guesstimated here by the amount of problems on the forum. Most issues are due to the sequential control system. Some of those issues are caused simply because of a loose or cracked vacuum hose!!