Got a 94 fd only mods are.
v mount intercooler
larger aluminum radiator
Apexi intake pipes with filters.

Im looking to make between 300-350rwhp on the stock twins, im planning on doing full turbo back exhaust,
anything else i should need?
will a need fuel upgrades?
if i do need fuel upgrades what will i need?
and also what should i use to tune?
Thanks Jesse

 

If you upgrade the fuel you have to control it..and that means an aftermarket ECU.
you'll need "someone knowledgeable" to tune that..(don't worry if you can't..I'm with you on that one.!..).
A good tuner is proficient in many types of ECU,like Apexi,Haltech,Motec,..etc.Depending on what you have under the hood they can usually give you a good added boost to your old stock numbers.
The only "snag" is to get a Tuner that knows Rotaries.
There are many on Forum here if you search.(try the Regional sections)

 

so will i need to upgrade the fuel system to hit my goals?
if so whats all needed?
and am thinking about the apexi pc to tune does that sound like a good idea?
how plug and play is it really?

 

You'll have to wait for the "Sarge" to pop in,If he can see this thread he can give his input on it.
I'm a 2nd Gen guy,so I'm not the best one to answer the 3rd gen stuff..and I don't believe in baffling with Bullshit.If I don't have an answer I won't "try to guess".

 

At 350whp a PFC will be sufficient to tune the car with those mods. The powerFC is literally plug and play. Setting up the idle takes a little time but it's nothing hard and there are guides.
At that horsepower the stock injectors will be VERY high in duty cycle which can cause failure much more easily. You can bore out your stock rails to accept larger side feed injectors or change the fuel system entirely. I wouldn't chance trying to do 350 on a completely stock fuel set up though.
I would consider at least a Walbro 255 since they're considerably cheaper than a Supra pump.
It's pretty arguable but I'd say 350 is also the reasonable limit of the stock twins too.

 

So if i do a walbro 255 i should be fine? will it need rewired? and awesome glad to hear the power fc is actually just plug and play.

 

*The picture you posted in the Midwest section showed the stock intercooler. ???
*Apex'i intake pipes are OK, but personally I prefer intakes that source ambient air from the nose, not underhood air.
*The stock FD made ~250 crank hp. You're hp goal of 300 to 350 wheel hp is going to be over 400 crank hp. So yes, you will be turning up the boost and will need fuel mods (pump, lines, filter and injectors) with a progammable standalone ECU. You may want to take a read through this recent thread.... https://www.rx7club.com/new-member-r...et-fd-1045220/ including the latter parts that talk about boost creep from those "full exhausts".

 

yes that pic was from quite a while ago, and i have read that thread about 4 times now.lol just trying to figure out "exactly" what fuel mods i will need to hit my goals.

 

anyone? some are saying stock injectors are fine and all i need is a 255 pump?

 

Like I said, you might be able to make it there but youll be very very high in the injector duty cycle..
Lets put it this way, if you're doing a pull and an injector decides it's suffered enough stress and goes out....likely you'll be needing a rebuild.

 

ok thats fine i dont mind getting new injectors, is there a drop in set that will do the job? or do i need to do some fabbing of some sort?

 

Take a look at what others are running that relate your power goals.
It's the easiest way to decide what and how you what to extend your power requirements.
Build threads,Single turbo and AI injection sections are crammed with guys telling what they run and how much they have achieved with it.
Even though Sarge gave you something "from a while ago" doesn't mean that things have changed that drastically.If you look at the Engine, that thing is from the 70's/80's..so really you are still tossing NEW tech on old stuff!

 

A stock engine with an enlarged intercooler, an exhaust and a power FC should make ~300hp.

As discussed here, you can go higher, but the turbos run out of legs, as will your fuel system.

My advice is to stick to around 300hp, which is plenty for regular use, trust me, then look at upgrading your turbos, fuel system etc. later on. Most power above about 300hp at the wheels will be a big step up in cost.

You might want to take a look at getting a set of late model turbos, the ones with teflon lining on the intake. Or you could look at another set of aftermarket turbos. At this stage though, you will be looking at around 400hp.

 

To err on the side of caution is never a bad idea with your motor. If you invest in a pump and injectors now, you will not only be able to move up in power levels later, but enjoy your ride with piece of mind. A rebuild is expensive, and heartbreaking to boot.

 

You can use bored out secondaries which are 1200-1300 CC's thats enough for about 340 while stayingsafe .


you will need a stand alone , PFC is plug and play like stated above , so is adaptronic . But tis a bit more expensive . You will also need some new gauges afr/ and a boost gauge , The PFC commander has water temp , but if you dont like the PFC commander you will need a water temp gauge as well .

You may also need to port the waste gate on the turbos if you by any chance have them off

And I would stay within the limits of the turbos say run them at 12/13 psi and just keep what ever power you get at tht level . and then later on upgrade the turbos

if you plan to upgrade turbos soon , you COULD up the boost to 14. I wouldn't go much higher then that though .

 

I wouldn't want to max out that 255 if you decide to upgrade the Setup.
The 255 is fine around stock and "some mild Mods",but after that you run out of fuel.It can't keep up.
I'd be going to a bigger output pump from the start and do it ONCE.That way you don't have to spend TWICE.
I'd look at the Aeromotive stealth or the 400. or 440.

sidenote: The Plug and play aftermarket install is all great and makes it easy to put in.
The Only downside is IF you have a bad stock harness.

Speaking from experience,I went through a lot of **** trying to get my car to run right and it turned out it WAS the harness.I went to a Haltech harness(Brand spankin new) and I never regretted that move.

 

Curious as to why you recommended those pumps over say... the denso supra TT pump everyone loves?

 

thanks for all the info guys, was hoping this would my my "winter plans' easier to its just making me think about more options that you guys are reccomending. lol

 

You know...it doesn't have to be done 'over night'. And you can make close to 300 w/o making huge boost increases. Baby steps can be ALOT cheaper in the long run, with far fewer costly mistakes and far less time on jack-stands. And in the meantime you might find out that a reliable 285 or so at the wheels is ALOT of fun.

 

I think thats the dierection im gonna go in motor has 98k on it so i think going simpler is better until it gets rebuilt. Seems most dont even last this many miles.

 

Brother if your motor has 98k on it I would start putting some money aside for a freshen up.. Not to say it's going to take a dump on you tomorrow, I'm just saying that's pretty long in the tooth. You obviously take good care of her. Merry Christmas all!

 

merry christmas to you to!
And yes i try to take VERY good care of it and do alot of research, motor will be getting rebuilt next winter and a street port wanting to get another summer out of it but if it doesnt make it thats fine got a crappy civic to dd.

 

Nothing wrong with putting a few bucks away each month in anticipation. Statistically I think most will have coolant seal failures around 100k. You could start watching the Parts for Sale section or just shopping for stuff...stainless OMP lines, gasket kits, coolant hoses, vacuum lines etc. But who knows?....you could get a couple summers out of it.

 

I find keeping a nice coolant in it goes a long way!! properly mixed will be easier on the pump and everything else inside the motor.