Hey, I need some opinions on this. Just want to know what else I will need to get about 325rwhp, maybe a bit more hp. As it stands right now, all I have for engine mods is a HKS downpipe and HKS catback exhaust . What else do you think i need? I was considering a midpipe( I know that makes a good gain), a SMIC and maybe a boost controller. Which is the common and most reliable setup?

 

I would do the following to TRY to achieve 325 rwhp:

1)downpipe
2)cat-back
3)intake
4)hi-flow cat or midpipe
5)upgraded intercooler
6)run 13 psi
7)possibly 1300 cc secondary injectors and fuel pump depending on your injector duty

To control that, you will need a reprogrammed ecu from M2 or Pettit or a stand-alone ecu like the Power FC or Haltech.

You could also streetport the engine (if you need a rebuild). That would get you to 325 at only 12 psi or maybe a hair less.

Before you got an aftermarket ecu, you could use a boost controller to restrict boost to 10 psi. However, I would never install a midpipe on a car with the stock ecu. Too dangerous.

 

you'll also need to get a new ecu, either a plug n play like the pettit and m2 or a standalone like the power fc. if you want to run the boost past 10 lbs you're gonna need this. you also forgot to mention an intake.
i say this setup (intake, dp, cb, smic, ecu, boost set at 12) i would think you'd be somewhere around 290-300rwhp. adding a midpipe will get you closer, but you will also need to port the wastegate to prevent boost creep. i would get all the mods listed above w/o the midpipe and have it dyno'd to see where you are. then you can make a decision on whether to get a midpipe or get a high flow cat.

check this thread out
https://www.rx7club.com/forum/showth...hreadid=134895
nick

 

Here's my list for you:

X downpipe
X cat-back
_ cool air intake
_ PowerFC or some other ECU upgrade (controls boost, too - 12 or 13 psi)
_ fuel pump
_ IC (SMIC if you have overheating concerns or do track events, otherwise FMIC)
_ high-flow cat

You might need a radiator to keep the car cool, but start by sealing up any leaks in the underbelly tray, including the foam strip along the bottom of the radiator.

-Max

 

Is the m2 Performance or the Pettit ecu's a good choice or should a guy select the powerfc or haltech? I was planning on a fuel pump and reg in the near future. What would be the best cold air intake? Oh ya, whats this "porting the wastegate" thing? I have never heard that before. You need to that for 12psi or higher? Do any of your have these setups and are they proven hp? Thanks guys for any help.

 

If I did a street port on top of the mods to get 325rwhp, what gain wouild i get? I don't need a rebuild yet. Car only has 58000 miles on it.

 

it would be better to have the engine rebiult and ported at the same time. 58K, your getting there. try to shoot for more hp, like 390-400 rwhp..

 

That is what I would do......... why do you figure going for 400rwhp? Would it be somewhat reliable?

 

As long as you have proper fuel and tuning - you'll be pretty reliable. There are 260 - 280 rwhp FDs that are not reliable because they're running without an ecu upgrade or running 15-16 psi through the stock intercooler. If you have everything tuned right with the fuel system upgrades - even a 400 rwhp FD can be reliable.

 

390-400rwhp on twins? Not gonna happen. If you do push the twins to the max Hp, ~360rwhp they aren't going to be reliable either.

Jeff

 

I highly recomend the PowerFC along with the datalogit. I have both of them and if I were to do things again I would buy them in a heart beat... You _DONT_ how much hidden power your car has till you install the PowerFC. Not to mention you can retune it as you mod your car. If you ever go single no problem! You cant say that for the M2 or any other nonreprogramable ECU.

Oh did I mention you can monitor a bunch of **** in real time and if you got the datalogit you can graph it as well.

-M

 

jeff, are you saying that stock twins cant produce over 360 rwhp?? If you are, AnthonyNYC made 386 rwhp on a 85-90 degree day, what do think he would have made on a 40 degree day?? Im not saying its reliable, but it can easily be done with proper tunning. I would spend 1500 bucks and buy the BNR stage 2 twins,I think brian is comming out with stage 3(less lag).. runnign 15-18 psi on stock twins is fine going down the drag stripe, but not on the street.

 

is the datalogit the power FC w/commander?Is it the choice to go for? On the fly tuning would be neat. Any knowledge on the Haltech? I heard it has 64 parameters compared to power FC which has only 16. Correct? Keep the info comin, and thanks.

 

choice of ecu is up to you. Everybody will have diff opinions. People say you cant make more power with the pfc on a street car than haltech, and the oppisite for the track. i dont know anything about the aem though. I have also heared that its hard to find a tunner to tune the pfc(all the tunner i have talk to can tune them)..

 

So me being a street car then, the power fc would be a good choice? Can I tune it myself or is it really difficult. I have a friend who is good with injection, maybe he could help? At least the powerfc is cheaper than the Haltech too( I pay in Canadian money).

 

I've read that the A'pex PFC comes pre-set to deal with most mods. The end-use needs to make small adjustments to lean out the fuel for optimum power production. The way the A'pex comes from the factory, it's set to run rich. Keep in mind, I don't have an A'pex PFC, but this is what I've read from folks that have used the A'pex PFC...

FWIW, I plan to get the A'pex PFC also...

 

Good info to know... that must be the 16 settings that i was told about then. That would make life easier for sure. The Haltech needs a lap top to run correct? Rich is better then lean... thinking safety those guys!

 

I can't believe you are recommending shooting for 400 RWHP on stock twins. Yea, Anthony did do it. This however is a very rare case and Anthony was shooting for absolute max power from the twins. He also didn't care how long the turbos lasted because he was only concerned about hitting 10's on stock turbos. I'm pretty sure RotorHP is looking for a good quick reliable street setup and 325 RWHP is a very nice goal he set for himself.

 

Thats just it...... I don't want to replace my turbos or have problems all the time. I want reliable power. It seems that this is a good number to hit. Some dyno runs that I have seen are most of the time around this mark. Not that the car isn't fast but mods are cool.

 

He didn't make 390-400 at the wheels right? If you can only make big HP on a cold day then I don't really think you have that much HP. The "~" stands for approximately. I wouldn't say that it can "easily" be done. Stock twins at high boost levels don't last so in my book it isn't worth considering.

When new cars are dyno'd they don't dyno them only on cold days.

Jeff

 

FWIW, the timing in the Power FC base map is really pushing it. Fuel is usually pretty rich, but too much timing will pop an engine just as easily.

 

First, I want to stand behind the PowerFC. I have it and it's awesome. Soooo many extras on it. Anyhow, as for the stock twins, I was pulling 339rwhp at about 14psi.

That was with:
-Power FC
-M2 Perf cool air intake box
-M2 Perf SM intercooler
-Nipponsdenso fuel pump
-RC Engineering 1300cc secondaries
-HKS downpipe
-Petit stainless resonated midpipe
-Racing Beat mufflers
-B&M NewVolts ignition
***but no porting

If you want any more HP than that but also want to be reliable, it's time for the single turbo. That's where I'm at now. I went with XS-Eng T04E and I'm expecting 390rwhp at 14 or 15 psi.

-Tom

 

Thats what I wanted to see. Thanks tomsRx7 for the list.... gives me an idea of what to do to my car.

 

I knew you wanted to see a list. Isn't it amazing how many people will post everything EXCEPT for what you really want? Feel free to PM me with any questions you may have.

 

well turbojeff, I look like you where saying that twins werent going to be reliable"not going to happen". Im bot going to argue with you that twins are capable of producing over ~~~360rwhp. I didnt say that it was relible did I??