S1ckStang

does swapping out the throttle body for say a bbk eliminate the electronic learning it does? so i dont have to worry about it getting on it before the tracka nd will it allow the same throttle response all the time?

Paleoc

A throttle body doesn't reprogram the computer and installing one on a non-FI car is not only a waste but may hurt your low-end performance due to reduced air velocity at low rpms.

S1ckStang

i know it doesn't reprogram the computer but i did not know if the actual stock throttle body was where the learning was done or if it was jsut the computer thats why i asked.

ezekiel

Throttle body is used to improve throttle response and amount of air floing into the engine. Perhaps you have that electronic throttle control. The last part I replaced in my previous car was its Mazda throttle position sensor which had been malfunctioning. [&:]

Paleoc

The computer does the learning. The throttle bodyconsists of little more than electrically operated actuators that move the flapper valve.

S1ckStang

yes i know what a throttle body is and how they work. jus my previous cars didnt do the learning so i didnt kno if they had a sensor or something in the throttle body that measured it because i hate this stupid learning its pissing me off. i keep having to reset my ecu before i start my car. so i was just asking if the sensor was in there. thats all.

armycook1981

@pal--
did you get before and afters with your t.b and your s/c?

Paleoc

The computer is probably pulling the information off the MAF.

I got mine before the S/C but the S/C was already purchased and was waiting on Paxton/Predator to develop a 2007 tune for it. A guy in Hawaii installed the same thing (he has a S/C as well) and had nothing but problems until he figured it out. The key is you have to take voltage readings (+ and -) off the stock throttle body and exactly match them with the new throttle body when you install it. The instructions that came with it say nothing at all about that and just talk about mechanical setup. If you don't match the voltage, the computer interprets it as a problem and puts your car into limp mode.

In daily driving (out of boost), the larger throttle body slows the air velocity down (same amount of air flowing through a larger opening) which hurts low end torque, drivability and gas mileage. It lopes like it has a mild cam and sputters especially when cold. It doesn't like low rpms, I have to stay in 4th gear until45 mphand drop from 5th to 4th going up a hill. Under boost, it reduces the pressure so the gauge maxes out at 9 lb rather than 10 or 10.5. However, the airflow is actually increased so you are getting better power. Think of pinching a water hose, the water squirts out under more pressure but try filling upa bucket with a pinched and unpinched hose. The unpinched hose will fill up the bucket faster, it flows more water under less pressure. At low rpms the engine doesn't need or want more air/fuel. At higher rpms, it does.