Hondata OR Crome

[reckedracing]

well, apparently to this guy anything that isn't a stand alone is a piggy back...

 

[10sec.hatch]

any thing added into the factory ecu is basically a piggyback cuz your still using a factory computer to run it

 

[Turbo&Auto]

But you're tuning the factory tune. Not overtop like an Emanage.

 

[reckedracing]

any thing added into the factory ecu is basically a piggyback cuz your still using a factory computer to run it

that is the lamest explanation i ever heard...
i respect your car and your building skills but come on...
i wouldn't consider a car tuned with a custom rom to be piggybacked...

 

[Turbo&Auto]

^For real. AND to clear that up, its not added to the ECU, it replaces the stock rom chip.

Sounds like someone is blinded by big name and dollar parts

 

[10sec.hatch]

^For real. AND to clear that up, its not added to the ECU, it replaces the stock rom chip.

Sounds like someone is blinded by big name and dollar parts

it replaces the stock rom chip? gee thats funny im pretty sure you have to desolder the board and put a couple sockets in with some resistors so it would be adding them in i used to run hondata at the time they didnt support itbs and was forced to find an alternative to run my all motor car and neptune just barely came out and wasnt offering software with there units and i wasnt gonna tow my car 150miles to get it tuned when i have my own dyno

 

[Turbo&Auto]

You do, but when you jump J1 you read external rom. IE, the chip your burned which has all the tune on it.

 

[formby]

meaning its not a piggy back...

Sounds like someone is blinded by big name and dollar parts

BINGO

 

[10sec.hatch]

ok if you say so technically it is, like i said before ive ran those programs they werent that great more of a hassle having to burn a chip and all. you all think what you want, i know, ive been down that road before so i speak from personal experience about 12 years of it so to clear it up crome is not a standalone, hondata is not a standalone,uberdata is not a standalone,zdyne is not a standalone,ghettodyne is not a standalone ect. ect. ect.

(def)#1 A program, function or system that operates on its own and has no interfaces

(def)#2A device, product or system that’s not incorporated into another more comprehensive device, product or system

and last but not least
* Crome, Hondata, Uberdata: These systems are all obd1 eprom editors. They work off the factory ecu. Some systems have more options then others.
* Aem EMS, Motec: These systems are standalone systems which operate on their own ecu. They have a lot more features then a system based on a factory ecu.

courtesy of phearable.net

 

[reckedracing]

i don't think anyone ever said any rom editor program was a standalone

but we were disputing that a tuned rom is a "piggyback"

here you go.... from your own source
i don't see it classifying a rom editor as a piggyback...

Why piggybacks (vafc, emanage) "suck" by pgmfi:
Piggy Back controllers allow stock ECUs to do things that they normally can't do, like run larger injectors or deal with boost. Remember that piggyback controllers work by altering sensor signals before they get to the ECU.
Most of the time, the primary signal being messed with is the Map Sensor. This is critically important in a Speed Density car. The Map Sensor is used by the ECU to guess how much air is going into the car, and therefore how much fuel to supply in order to match airflow. When you "lean" out a car with an AFC, you are simply decreasing the Map Sensor signal - the ECU responds to the decrease in manifold pressure by supplying less fuel. When you "richen" a car with an AFC, you are simply increasing the Map Sensor signal - the ECU responds to the increase in manifold pressure by supplying more fuel.
The change in fueling happens for a reason: if you look at a fuel table, Map Sensor values correspond with columns. When you increase or decrease the signal from the Map Sensor, you are simply making the ECU use a different column than it originally would have used. (see Understanding Maps if you need some help understanding reading Fuel and Ign tables)
But wait, isn't the Map Sensor used for determining ignition requirements too? When you "lean" out a car with a Piggy Back, you also in all likelyhood advanced timing. When you "richen" a car with a Piggy Back, you also in all likelyhood retarded timing. Look at trends horizontally (as MAP changes) in an ignition table, and you will see why this happens. This helps explain why so many boosted cars running on the "AFC hack" have issues due to excessive ignition advance.
The bottom line: Piggy Back Controllers suck because you cannot independently adjust fuel and ignition. Any changes to fueling will produce a change in ignition too, and often this is undesirable.

any thing added into the factory ecu is basically a piggyback cuz your still using a factory computer to run it

A Piggy Back controller is a device that "piggybacks" on top of the ECU. Piggybacks intercept signals coming from the engine and alter them before they reach the ECU. The most commonly abused piggyback controllers are the Apexi SAFC, VAFC, SAFC2 and VAFC2. The Greddy E-Manage is a big badass piggyback controller on steroids. You could think of a lot of the garbage that comes with a JRSC kit as a piggyback, as their relay and crap setup causes bogus sensor values to be passed to the ECU.

 

[10sec.hatch]

its all good we could argue about this all day so ill stop now im my pockets arent deep at all the aem doesnt cost as much as every one says it does maybe if i had a motec or electromotive between 4,000 to 6,000 dollars then yeah thats a grip of money

 

[GSRCRXsi]

how about control boost, traction control, boost by gears, datalog hours of info and loop itself to the begining ,anti-lag and crome is not a standalone its a program designed to work with a ("FACTORY ECU") so how is that considered like a standalone? factory ecu's have boundries that are already in the program, standalones you make your own boundries it does what you tell it too.

yes, yes, yes, yes and yes. crome does all that.

crome is not a piggyback. a piggyback is something that alters the signal comming into the factory ecu. crome reads the aactual signals but you now have control of what to do with them. a chipped ecu is no longer "factory".

while i agree crome/uberdata/hondata are not stand alones, they are not piggybacks either.