im picking up a built rev up motor with fcon, do i need the factory ecu? kind of a noob question, but never looked into it. mines an 03, motors an 05

 

isn't the Fcon still considered a piggy-back? which means you'd still need the ECU for the motor.

 

i beleive its a stand alone, but i could be mistaken. i need to know please!!

 

It is a standalone but you still need your ECU. I will probably need a Revup ECU..

 

With a Haltech, you could keep your existing ECU and use the Haltech to control the exhaust cams.

I imagine you could do the same with an FCon, but there's more secrecy involved with them and I am not sure.

 

the setup includes fcon, fcon navigator, and knock amps. im not sure if itll run right if im running my factory 03 ecu

 

an FCon is not a standalone, it is still piggybacked (doesn't do anywhere close to all the engine functions). You need a factory ecu. A revup engine would need a revup ecu

 

As well as a revup engine wiring harness.
It may be possible to use the 03 ECU & harness with a Haltech as it has duel cam control needed on a revup, but not an FCon

 

true, good point Nathan

but would the haltech recognize that both cams can be actuated if it's not running the revup wiring harness? Might involve some cutting and splicing

 

Haltech can handle this situation because it controls both the intake and exhaust cams (revup). FCon can not, because it lacks cam-control altogether.

In order to use a revup motor in a nonrevup car with a Haltech, you will need to run 2 sets of wires (cam sensors & solenoids). It is simple and straightforward, and I can provide the wiring instructions and base map if anyone gets to this point. Keep in mind, you will need the 4 connectors from the revup harness to attach to the cam sensors/solenoids.

 

i found an ecu, but im having a ***** of a time finding the harness. anybody point me in the right direction?

 

or any way i can modify the stock harness to work with a rev up ecu?

 

The stock harness will need added wires from the 4 extra sensors & then a full
comparison check of pin outs of both ECU,s. Will it work ? Maybe, but it not a going to be easy
Better to sell the F Con, Take up Hal's offer with the Haltech then there's no need to get a revup ECU & harness. The cost will be more but you will now have a state of the art setup able to be tuned by most proficiant tuners & not locked into HKS

 

well the setup is from eagletanggreen, and im getting the entire setup for a hell of a deal. also, his fcon was left unlocked by shariff, and is getting tuned by sound performance most likely. nathan you seem to know your material, care to explain a bit more what wires need to be added? i have all winter as the setups not going in until springtime. thanks alot btw everybody, keep the info coming

 

You know you could just get a pin out from nissan fairly easily, and run and Uprev tune on it. I know the guys from Nissan Sport Mag have been able to get them. We've helped a number of people get the ECU running right in their swap and we're fully tuneable. You can get the ECU brand new from the dealership for $500-$600, Osiris Tuner for $900, and a few wires for $4. Roughly the money you'd get from selling the Fcon.

 

im trying to run the fcon, its built motor using my greddy twins

 

We've removed an Fcon and replaced it with Foldgers Crystals, lets see if anyone noticed.

Actually we replaced it with the stock ECU and ran 550whp on a JWT TT kit. So you don't have to use more than the stock ECU with our software to support the motor you're trying to run if you don't want. The Fcon has some cool modules you can add to it, and you can add extra sensors.

The only thing you need when running the stock ECU with Osiris is a Modified MAF, and a boost controller.

 

Also. I want to point out, the Haltech and the Fcon both have features that you will not get with the stock ECU. There are still a number of applications where someone is doing either something totally wild, or they have access to a tuner that knows some cool tricks that make those systems really shine.

The Osiris Tuner system is more designed to help do it yourselfers, and Pro Tuners to wrangle the solid basic cars, whether they are NA or FI. If you're trying to achieve 1000+ HP you're going to want to spend the extra money on the Haltech or Fcon because you WILL need the extra sensor inputs. Builds of that nature are really on the ragged edge and do require the extra bit of effort.

But if you're running a fairly well rounded single or twin set up, or a super charger, save yourself a few thousand on all the install and parts and tuning. The stock ECU is actually a quite capable package. With the addition of the VVEL controls and a MAP sensor (because of the VVEL technology) the ECU you're using is VERY similar to the ECU in the GTR.

 

As Hal has pointed out, you will need to run wires from the exhaust cam sensors & activating solinoids to the correct pinouts on the revup ECU.
Can it be done like this? I dont know as I dont have the revup circuit diagrams to compare.
Another possabilty is to lock up the exhaust cam phaser to 03 timing position or better still the best position for your intended power usage (I assume a drift project ) & ignore the exhaust electrics.