Yaris Intake Manifold

[richardholdener]

Air fuel is the same as stock intake since this motor has a mass air meter.

Originally Posted by cee_dub2003

I would just like to throw my 2 cents into this. I take my hat off to the making of this intake manifold. I really don't see committing to a high dollar item without seeing more info on this intake manifold. Everyone has to realize you are committing "with your word and in print" to purchase a item that hasn't even been seen yet. I wouldn't commit to buy any performance item without seeing pictures. whats wrong with posting prototype pictures? Its prototype right? I think everyone here would like to see pictures, and have more info on what they are committing to this.

Any A/F readings taken?

[cee_dub2003]

Originally Posted by richardholdener

Air fuel is the same as stock intake since this motor has a mass air meter.

That is really hard to understand! For one the MAF only calibrates air volume and AIT temp. adding more air into each cylinder would cause the car to run lean, and ping, causing the knock sensor to draw back timing to compensate for the lean in tunr loosing HP.

I have seen a intake manifold for a TC do this. I would really like to see how you have done this when the Toyotas MAF is a very learing piece of equipment.

[richardholdener]

Hopefully this will help you and others understand why your comments are somewhat inaccurate. The mass air meter is not a learning device, it is a simple measurement device that measures mass flow (temp, volume and infered density). The learning portion of the equation comes from the ECU (interpretation of signals from various sensors including MAF). Using a hot wire, voltage is applied to keep the wire at a given temperature. The greater the airflow (or lower the temperature of said air), the greater the voltage required to maintain a constant element temperature. This change in voltage (or frequency on some MAF applications) is correlated to airflow based on the relationship between ID of the meter assembly and what is refered to as the sample tube (flow orifice to hot wire element). The change in airflow through the system (that happens at different engine speeds and/or loads) is compensated for by the MAF. The same thing happens with changes in airflow from something like an intake upgrade. Problems can arise when you run out of effective meter range (we call this topping out the meter-meaning we reach the voltage ceiling near 5.0V). This can happen with major power gains like those achieved with a blower or turbo. We rescale the meter and combine it with larger injectors for these applications, but for something simple like an intake upgrade-there is no need for this. In reality, altering the mass air meter (by orientation, entry or alteration of ratio between flow orifice and metering orifice) will have much more of a change in the air/fuel ratio than adding the intake manifold. This knowledge on the workings of a mass air meter plus the actual data that came from the hundreds of direct back-to-back dyno tests run indicate that the air/fuel is not effected by the change in intake manifold on the Yaris. I make it a point never to bring speculation to a data fight.

Originally Posted by cee_dub2003

That is really hard to understand! For one the MAF only calibrates air volume and AIT temp. adding more air into each cylinder would cause the car to run lean, and ping, causing the knock sensor to draw back timing to compensate for the lean in tunr loosing HP.

I have seen a intake manifold for a TC do this. I would really like to see how you have done this when the Toyotas MAF is a very learing piece of equipment.

[cee_dub2003]

Thank you for clarifying that better for me. Sorry for the somewhat information information.