Quote:
Originally Posted by warwickben
carbs are cheaper and better for people who cant buy every part for there car at once.
because correct me if iam wrong you can do alot more upgrades to the motor before you have to get a new carb to keep doing upgrades.yeah maybe a rejet and a tune.
with efi certain upgrades make you have to get a custom tune. so if you in stall x part one week you need a new tune. then a month later you in stall x part and need another tune.
this is what a buddy told me that went to uti. is this true.
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Sorta...Alot it has to be with how the ecu determines the amount of air entering the engine. In older AFM and MAF setups, the engine determines the amount of air in the engine by the amount of air that passes through a sensor in you intake. This system was used on FCs and allowed for a number of modifications on the stock tune. Modifying things such as intake and exhaust will increases the flow, but the sensor figures this out. Basically, you need an ECU mod when you are forced to upgrade injectors since the map is different depending on injector size. FDs and most aftermarket ECUs utilize a MAP based system which simply determines the air based on the pressure within the intake manifold. These systems reduce the restictions in the intake tracts presented by AFM and MAF systems, but unfortunantely, they are less forgiving on modifications and require remapping for any serious mods. Some cars such as the Subaru WRXs require a reflash for pretty much any upgrade or they with throw codes and run incorrectly risking your engine's life
03-11-2008, 07:51 PM
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