Quote:
|
Originally Posted by AtomicLabMonkey
Quote:
|
Originally Posted by sperry
Also.. a Cold Air Intake will not make that car into a "235hp" car. In fact, on an otherwise stock car, a CAI will *lose* horsepower, since the intake will lean our the Air/Fuel ratio, and cause knock, so the ECU will have to retard the timing to keep the motor from blowing up, which results in less power.
|
This doesn't make sense to me. Why wouldn't the computer just add fuel to keep the mixture at the targeted AFR with any increased airflow? They have air meters in the intake tract, right? Are the injectors already maxed out at 227hp or something? |
The ECU's uses both MAF and MAP, however, the CAI's just flow too much throught the MAF w/o the MAF voltage changing properly. Up here at Reno altitude, it's not a big issue, since we've got less O2... but in SoCal, where that car's from, it's probably pretty bad.
Essentially, you have to have engine management tuned for the CAI, or it's bad for the car.