As it says in my sig my motor is currently being built and I will be utilizing an HKS Fcon Vpro. I have searched and researched and have read many threads where respectable tuners have stated that it is one of if not the best EMS for our Z.
I was recently having an argument with another FI Z owner about ems’s and I could not come up with any technical data as to why the Fcon is the best choice. Like I said I have read a lot of information about the Fcon, but the problem is I really don’t understand much of it.
Can you please enlighten me as to why it is the best choice and what it can do that other ems’s can not do?

Thanks.

p.s. please forgive my lack of technical knowledge.

 

Here are a few points I posted on another thread:
Here are some of the benifits of the FCON:
1) Closed Loop and Open Loop AF Feedback...tuner adjusts the level of adjustment, and the area in that maps where adjustment can take place.
2) Knock Detection and sophisticated controls
3) 32X32 resolution for very precise engine calibration
4) Controls large low impedence injectors easily. Our FCON cars wth 1000cc injectors start just like stock...no throttle blipping or user input needed
5) VERY tight overboost fuel cut. No reading ahead.
6) Once an FCON is tuned, it never needs to be retuned.
7) Two Step Rev Limiter
8) Individual cycle trim
too many more to list.
9) Consistency and precision....100% OF THE TIME.

 

other ems's can do what the fcon can do . but arent available for our cars right now .

 

thanks Sharif. but... this leads to a few more questions.
1) i get that part
2) i dont quite get what that means.
3) what is the resolution of other ems's?
4) what are low impedence injectors?
5) get that part
6) get that part
7) get that part
8) and 9) i think i understand.

 

2) Knock Detection - When the FCon VPro is tuned with the HKS KnockAmp and a set of High Quality headphones, the tuner can listen to engine noise and very carefully listen for knock. As the engine gets closer to knocking or detonation it gets louder and louder, and then if knocking(or detonation) does occur the tuner can hear it before it can seriously damage anything. By tuning a car with out this equipment you are really in the dark because the knock you are listening for is so loud it could be heard without microphones and over your engine/exhaust sounds which means it could be damaging the engine already. The HKS KnockAmp has adjustability to filter out other noise so you can focus on just knocking. This is one of the reason we were able to make so much power on my engine safely.

3) Resolution - The Vpro has a 32x32 map for fuel and timing. other ems are either 16x16, 10x32, 10x16, etc. Basically not enough resolution for a high horsepower car with OEM-like driveability, anyone can tune for power but how many people can deliver a high hp car that drives as close to, if not as good as stock?

4) Low Impedance Injectors - aka Peak and Hold injectors can be controlled more precisely because they are able to be held at a higher state of readyness, they always have a current going through them which alows them to fire quicker, and more precisely than non peak and hold injectors. Obvioulsly you need a special circuit to drive these types of injectors and some EMS cannot control them. This is also why my car can idle 1000cc injectors like stock.

8) and 9) You can control each cylinder indv. to make sure the engine will run as smooth as possible. Unless you have a standalone with full control over the engine your results will always vary and change with weather, temp, etc. With the VPRO your results will always be the same because of all the compensations it has which inlcude but are not limited to: Intake Air Temp, Fuel Press., Speed, EGT, etc.

There are MANY features that the VPro has which many people don't know about or use. If people who contest the VPro and "try" to compare it to other piggybacks on the market knew what it had to offer and have seen the software first hand they would see why they are wrong.

You simply Cannot compare a full standalone EMS to a piggyback EMS.

Thats my 2 cents

-George
GT Motorsports

 

^ damn George that really helps me understand. thanks for the indepth explanation.

 

I wish HKS would release a full list of all the features.

 

If they did I think it would be a BOOK not a list, haha

-George
GT Motorsports

 

lol I dont doubt it. It would be nice if someone could start a list so people can know what they want activated for their car.

 

does the FCON offer individual cylinder tuning (fuel and timing)?

 

I know it does offer that.

 

Yes it does! And when used properly it really lets you tune engine more refinely to achieve better, balanced preformance. This is also another feature most EMS' don't offer short of AEM and MoTeC.

Hope this helps,

-George
GT Motorsports

 

wouldnt you need individual a/f sensors to take advantage of this feature ?

 

Booger,

Yes, you will need a separate left and right bank wide band input from a high quality A/F meter, in my findings bank 2 always runs leaner than bank 1 on the vq's. This feature in the VPro came in real handy on George's car, and when we were logging the A/F ratio there was definetly .2 to .4 A/F ratio difference between both banks, we were able to balance both cyclinder banks by adding on average 3 to 5 percent more fuel to bank #2.

 

Thats what Ive found to . Driver side runs leaner . But to do each individual cyl. you would have to have individual bungs in each header pipe . I would love to have that set up !

 

individual A:F sensors or EGT probes would work.

 

On the engines we have dissassembled, the rear cylinders tend to run leaner as well, based on our examination. Adding a couple percentage points of fuel in #5 and #6 is also a good idea.

 

Dose the F-CON comes with software or something? like the rest of the EMS,
or only a dealer can do the tuning.

 

The FCON can only be tuned by an HKS Pro Dealer. On the boards, that would be GTM, SGP, Forged Performance, GRD, and AAM.

 

That in my opinion is the problem with the FCON, there are so few places to work on it.