greddy eMANAGE ultimate ?????

[harderandfaster]

does anyone know anything bout the emanage ultimate system from greddy i want to know if its any good if it tunes well things of that sort any info will be greatly appreciated

[GetawayInMoscow]

stay away from piggy backs...find something better

[GetawayInMoscow]

I got tired of typing this repeatedly on discussion boards, so I decided to add it here.

If you don't know what a Piggy Back controller is, read about it first.

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 less 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.

[harderandfaster]

do u know any good after market ecu's

[a1320honda]

Is it for a honda? IM not a huge fan of piggybacks either, but for light mods and such, there is some power to be made. Look at what i did with my talon. That was all tuned on an Apexi safcII. Mid 12's and the possibilty of going faster. You just have to know what your doing. You need a way to datalog and watch the A/F, like on a wideband.

As far as Ecu's....If its for a honda, You can chip yours and tune it with readily downloadable free programs. But you will need to buy a burner, or if you wan real time tuning, buy an ostrich from Moates.net. Lookin at around 200 shipped for that, but that will interface with a laptop and give you quite a bit of control over your fuel, timing and spark controls. Or theres a couple of standalone systems if you wanna spend the money. LIke hondata or AEM EMS. expect to spend $750+. It just depends on how deep your pockets are and how far into tuning you wanna get. Set goals, Like....What are your horsewpower goals, how fast do you wanna go, how much do you wanna spend. Hope this all helps.

[harderandfaster]

its actualy for a 240sx with an sr20det

[a1320honda]

Sorry, i just dont know enough about nissans to know whats available.

[GetawayInMoscow]

I don't know enough about nissan's either, however I do know there are a ton of better options than an SAFC2....maybe check out www.zilvia.net

[KryptoSol]

for a 240 i'd do the SDS or EMS stinger unit.