im debating whether or not to get an aftermarket turbo. my origional plan is just to go with a apexi intake and a complete apexi n1 exhaust (all the way from dp to catback) on a s5 TII. how much hp do you think my car will get with everything stock except the 2 things mentioned above? if i get a decent gain im probably going to forget the new turbo because i want to run pretty close to stock and not have to deal with the problems.

 

Well you will have problems if you upgrade the exhaust and intake only...

 

...explain...?

 

no fuel mods and your engine is gonna blow quick. Try getting a Walbro Fuel Pump and some sort of Fuel Controller and maybe 720cc to be safe.

depending on engine and boost, you will probably get 240-260 rwhp.

 

im guessing that porting the stock wastegate would be a good idea as well.

 

what about with a power fc, walbro, and injectors?

 

what about the fact that apexi only made power fc compatible with S5 FC. I'd rather look for microtech or haltech if I was you.

Walbro is a must ( or any fuel pump upgrade ) if you're planning on raising radically your hp numbers

I went with 1600CC secondaries. Since you're going standalone anyway, it's gonna be no problem to control them properly

But youre looking for BIG money here

more or less 1200$

l-p

 

it is an s5. so power FC, injectors, and walbro and im good to go with the dp, exhaust and intake?

 

It depends on your situation. My friend gets 9-10 psi with full 3" exhaust. I don't know why other people get 15-18psi. well, i mostly hear about s4's and s4 wastegates are weaker with one hole instead of s5 with two. in this case its an s5.


yep. make sure u do some good tuning for the added boost. standalone isnt really needed for mildly modified engines, thats how i see it.

 

Technically speaking, stand-alone is needed on STOCK cars. The 20 year old technology running you engine from the factory, although yes it works, is still very stumbly and coarse. No where near the resolution of a modern EMS like a Haltech. A properly tuned EMS will run a stock car better than the factory ECU. Aside from emissions of course.

You can really only get a spike of boost that high. The stock turbo jut doesn't have the breath to run that much pressure. Plus even that 18psi spike is boiling hot, useless air anyways.

_________________________

The only way to tell what parts you will or will not need is by answering:

How much power do I want?
How much can I afford to spend?
What will I use the car for afterwards?

 

injectors, fuel pump, upgraded ecu THEN ur car is ready for new turbo yadda yadda yadda

 

plug the turbo wastegate or get a good boost controller and run the stock turbo as hard as you can untill it blows. Why not have fun with the stock parts? with a good tune you can make 250 rwhp on a stock s5 block.

 

WTF??????

 

you'll have to port your waste gate. I had an intake + 3" exhaust and was running 17 psi

and I would probably recomend against the power FC, you'll have to import a japanesse one, and there isn't much support for then for the 2nd gen. I would probably go with a haltech or microtech, or just a fuel controller like an safc, or an rtek.

 

Microtech would make it run better, yes, but its not really necessary to get a good tune off of a mildly modified engine using something like HKS Fcon with HKS GCC or SAFC.

 

No its not necessary.....

But have you ever seen wideband readings from car with intake/exhaust 10psi and a "tuned" s-afc? Its all over the board.....lean spots during the secondary transition, then big rich spots when they come online....its "OK" it'll run and it won't blow to bits, but it can run sooooo much better, not to mention probably find more power, with a proper EMS.

And never........never........think its "not necessary" to get a good tune. Especially on a mildly modded engine good tuning will help immensely. I can tell from your comment that you've never had a really bad *** clean tune on your setup, becuase you can tell the difference, its night and day. And if you had one, you would know better

 

Yes, I have never had a standalone system, but i know people with them. And I know it is a much better choice, but not everyone can afford it and not everyone does their own work either. A tuned safc is just fine and wont blow to bits like you said. It might not be to its fullest potential but my point is that its ok to run like that. I'm keeping it as simple as possible for him. Remember this guys said as stock as possible and not so expensive. As for me, when I go big then i will go standalone myself. but right now, im still learning myself, so i will play around with the easy stuff and get really good at it before moving on to standalone. I know you probably have more exp than me with crazy setups, but i am just trying to keep it simple and easy for the topic starter which he asked for.

 

Where did I say that?..................


Just for the record

 

Actually what i was trying to state was, you were correct about it being able to run and not blow up to bits. and thats what i was getting at, that its ok and good enough. yet its not the full potential of a standalone but it is much easier and simple for the topic starter.

 

so in short, safc is good, but haltech or pfc is even better. i guess im going to go with the standalone, but now i gotta make the decision between pfc and haltech. any suggestions?

 

the safc is good enough. but standalone is better but will cost you $1200 brand new. Microtech or Haltech are the common ones most rx-7 owners use. Apexi Power FC is one I've been hearing about. I've also heard about HKS FCON V PRO but I dont know anyone who uses it.

 

for your setup an Rtek 1.7 or 2.0 is perfect. also they are plug-n-play. very cost effective. you should deffinately look into one.

 

AGGH! EDIT! I just realized, dude, ^^^^^, this is an S5!! RTek doesn't work on S5's, goddamnit!



About the RTek comments...

If you have any plans of ever upgrading from the stock turbo, don't waste your money on an RTek.

I have a 2.0....but, I would never trust it to run my car on any turbo bigger than stock. If I had it to do over again (and I hadn't sold my T2), I would definitely have gone Microtech or Haltech (depending on what Steve Kan likes to tune more )

If you can afford it, absolutely go standalone. The stock ECU is soooo butchered up, with such crappy maps from the factory. A standalone with a proper tune will net insane gains on any setup, with full potential to increase power if the time comes for a bigger turbo.


Don't waste your time on an SAFC or GCC, either go standalone or go home :X

 

Why not go SAFC or GCC? Just dont buy it new. They are cheap used. Got my HKS PFC F-con in mint condition for $100 shipped and HKS GCC Brand new for $48 shipped (Gotta love Ebay). with this i can run mildy modified at least and be pretty quick compared to stock. The amount I spent on all of my mods are about the same price as a standalone ecu. If I bought a standalone with the money i spent on the other mods, I would still be stock. so my setup is good enough to keep me a little satisfied until i have enough $$$ to go bigger.

 

Didn't we just go thrugh this?

$148 is over 25% of the cost of a megasquirt.....Zeal was making PLUG AND PLAY ones.

The ONLY "piggy back" I have used is E-manage and its only because I can control timing with it. Which was entirely necessary on the larger turbo. Face it, even though S-afc is cheap, it will wear out other more expensive componentes faster than a proper (or closer to proper) setup would and in the end is more expensive.

But there's obviously no detturring you from this, your frame of mind is stuck so I won't waste my breathe any more.