quid

Hello my brothers. I have a '93 manual with the following modifications:

-HKS turbo timer
-3" downpipe
-3" midpipe
-3" catback
-Greddy Profec B Spec II boost controller
-XSPOWER intercooler, 3x12x18, with hard pipe kit
-Greddy RS blow off valve
-no power steering, air conditioning, or air pump
-Greddy racing pulleys with belt
-optima battery w/ grounding kit
-lowering springs
-18 x 9 Fittipaldi rims with Falkin skins

Do you think it is time for for the APEXI Power FC? What do you guys think?

Thanks,
Quid

TurboLumpy

put the stock cat back on until you get some sort of ECU...which should defly be your next mod

Battyboy

To answer your question that you obviously know the answer to already, yes a Power FC would be a great idea.

rynberg

Just how is the XS Power IC set up? As an FMIC or SMIC?

Most definitely get a PFC and get it tuned! Larger injectors with a fuel pump to make it worth running the midpipe would be good.

And Fittipaldis? Come on, man, this is an FD. What do those weigh, 35 lbs each? Get some quality wheels.

But more importantly than all of those items is maintenance -- everything on the car fresh? Suspension, hoses, fluids, filters, etc?

Just my 2 cents.

alloyboy

I'd go for an induction kit first ,and then maybe a fuel pump ,upgrading the cooling aswell is always the best idea i.e. Thicker rad maybe relocate it

RX 4 Speed

^^^Before a PFC? Are you on something??? he has a dp, mp, exhaust among other things, with no ECU mod (at least he has a boost controller)... and he you want him to get an induction kit and a fuel pump? Please don't give people wrong information... Jesus...

Sgtblue

iTrader: (16)

Does he have to put the whole cat-back on? Since he has the BC, wouldn't just re-installing the cat be enough?

At any rate, my first thoughts were similar to rynberg's. Make sure the cooling system and hoses are all up to job. Get a boost and temp guage, consider replacing the stock radiator (w/a coolant flush), metal AST and make sure all the vac hoses are good.
Maybe not as much fun "up front" but likely save him alot of grief later on.

quid

Yeah, thank you all for responding. I do already have a boost gauge, and A/F gauge, silicone vacuum hoses, new brakes, new upper and lower intake gaskets and pretty much everything else on the motor has been freshened up. And, Rynberg, if I didnot own them, I would say the same thing about the Fittipaldis but they are not that heavy and they really do look good. THanks for the feedback though.

THe intercooler is a SMIC set up. I would post some pics but my Ex-finace just moved out of my house and she got the digital camera.

So, I will go ahead and pick up the Apexi. What size injectors do you guys recommend. A good buddy of mine here in San Anotnio said I should go ahead and get some 1600 secondaries. The Power FC is not ready for 1600s, right? I have to have the unit sent off for that, right? Is it worth it or are 1300s enough. Again, thanks for the input.

Quid

Rx-7Addict

iTrader: (2)

The Power FC will take any injectors you can throw at it... 1300s or 1600s will work. All you need to do is change a setting for it to accept the bigger injectors and tune accordingly

rynberg

Wrong. The PFC is set up for high-impedance injectors for up to 1500cc. You need the datalogit add-on to increase up to 1600cc. The 1600cc injectors available (Bosch) are low-impedance injectors and will require resistors to be wired in series -- otherwise the drivers in the PFC can overload.

I do not like the 1600cc injector upgrade for stock twins, as it requires the removal of emissions and, essentially, the sequential control system. There is no need for such large injectors unless you are trying to hit over 425 rwhp.

rynberg

Have you fabricated a duct for the IC? An unducted aftermarket IC will probably perform worse than the stock IC.

alberto_mg

btw - Steve Kan at Gotham Racing in TX is one of the best for tuning.

quid

So, what are your recommendations for secondary injector size? I eventually do want to run more than 425 rear whell horsepower. I have the stock twins for now. I just do not like to upgrade the same part more than once. What is the largest injector size I can run without jumping through rings of fire?

2FAST7S

to address your question, since you already deleted the core of the emissions system(the cat) and have plans to go single by the looks of the #s youre expecting to hit...yeah, 1600cc secondaries. No emissions or rats nest need for single turbo fd. For now PFC would definately do. that and making sure your car is up to it. major tune up, maybe. You dont have to get the fuel stuff at the same time, once you do just get retuned for it...isnt that the beauty of a stand alone? lol

quid

that sounds great brother. Thanks for the information. This forum is the best source of information on the planet. I might be calling on your guys again once I actualy get the powr FC. Anyone have a good source on where I can get the pfc? I have been looking for it on eBay for a while and it sems like the going rate is about 800 to 850. Can I do better than that. Thanks again.

Quid

technonovice

After your ecu, consider an Innovate wideband. You might think about an AEM ecu. Its slicker than the PFC and Datalogit which I have. They work, but they are not as nice as the AEM. There are RX-7s making big power running well with the AEM.

TT_Rex_7

FWIW, Rx7.com seems to have a hell of a deal on the PFC. $1,050.00 for the PowerFC and Commander.

http://rx7.com/store/rx7/fdecu.html#apex

-Alex

rynberg

Huh? The AEM is the biggest stinker product to come out for the FD IMO. I'm only aware of one person on these boards actually successfully making big power on it -- everyone else I've seen gave a go at trying to use it and then (tried) to sell it off....

Maybe I don't look at the right parts of the board, but I would never recommend the AEM ecu to anyone. The PFC is proven over many years of use to be a good ecu for a car that sees street use and makes up to 500 rwhp or so.

RX 4 Speed

hey rynberg, just curious... if my mods are a dp, and catback, what benefits do you see with me running a PFC? Is there any need to, if I am satisfied with the power? What would I gain? I was just curious...

rynberg

Pros: Smoother running and more power = when PROPERLY tuned even at 10 psi, ability to control things like the temps fans come on, ability to monitor all engine sensors, etc

Cons: Cost, possible (likely?) problems with A/C operation

quid

No, buddy, I have not fabricated any ducting quite yet. As a matter of fact the car does not run right at the moment. I did a couple if mods simultaneously and now it does not run like it should. I have another thread posted on this forum. It is called 'headlights working in reverse' or something like that. I would appreciate any help on that thread also.

But back to the duct issue. What have you seen in the past? Have guys just had some homemade jobs like bent sheet metal or aluminum? What can you recommend for ducting? Thanks a bunch.

Quid

technonovice

Check here:
http://forum.aempower.com/bbs/viewfo...a7952e6a450499

The PFC is more popular and we have more experience with it, but I've run the AEM in my car long enough to play with the built in capabilities on a laptop which tanscend what my PFS can do even with Datalogit. I never said don't get a PFC. I said the AEM is worth a look. With the AEM you have to tune it more to get started whereas the PFC seems to be shipped with a more reasonable basemap.

rynberg

You're right, my last post may have been a little bit carried away. But the fact does remain that with almost any mods, you can simply plug in a PFC and drive in vacuum until tuning (with a quick change to the PIM or injector size settings, if necessary). With lighter mods, it's even safe to boost a few psi without tuning. With the AEM, all I've seen are stories of cars not being able to idle or even START without extensive work. Perhaps things have changed a little bit since it's been a while since I kept up with the AEM.

Still, you have to admit that AEM did a **** job of preparing the product (which was delayed about a year over it's predicted release IIRC). The recent debacle with their ignition amp coupled with their ecu issues makes me wary of their company in general.

rynberg

I've seen aluminum and hand-laid fiberglass used. The point is, though, that without a GOOD fitting duct, the IC will simply not work very well, maybe not even as well as the stock IC. This is one of those cases where a cheap price does not equal a good value, IMO.

Spirit_Rotary_7

1300cc injectors is what I would recommend. It is good for around 425whp. You can check out my 'heated' thread for custom ducting. Although it is for a v-mount, the principles of the ducting is still the same if you think it through. I would recommend NOT boosting on your current setup without some sort of aftermarket ecu, PFC preferably.