Well thanks for laughing at me, and the reason I included that in the picture was so ppl didn't ask "well do I need a wastegate then...since it's not in the picture? er durr" and yes thank you, I'm pretty sure we all know that the exhaust air never mixes with the air that ends up in our throttle bottle, it just spins the turbine.BuGS wrote:ahahahahahaha that picture is extremely funny. Wastegate is for EXHAUST gasses, not measured intake HAHAHAH
this still doesnt answer our question on if you can put a flaper style maf after the turbo or not. lets not forget the point of this thread.XxantwawnxX wrote:Look above i changed it, and thats hwo it works. so disregared my first statement.
XxantwawnxX wrote:A mass airflow sensor does the job of a volum airflow sensor and an air temperature sensor. It measures air MASS. The mass of a given amount of air is calculated by multtiplying its volume by its desnsity.
the mass airflow sensor converts air flowing past a heated sensing element into an electrical sensor. The strength of its signal is determined by the enregy needed to keep the element at a constant temperature above the incming ambiant air. As the volum and density (mass) of airflow across the heated element changes, the temp of the elemnt is affected and the current flow to the element is adjusted to maintain the desired temp of the heating element. The varying curent flow paralles the particular characteristics of the air (hot,dry,cold,humid,high/low pressure)
but isnt the sohc I4 a flaper style, and called a MAF?XxantwawnxX wrote:If it has a flapper its a VAF as far as i know there are only two basic types of MAF sensors , Heated wire and hot film type. But yea as far as a Volume/vane Air Flow after the turbo...i would assume you can.
its time for me to go on a knowledge hunt and annoy the hell outta everyone i know that might know something about this.XxantwawnxX wrote:Im not sure, if its called a MAF and has a flapper. According from what i learned in class MAF are only those two types i mentioned. Flapper styles cant measure mass. But there can alwasy be exceptions i guess. Flappers only measure airflow or volume, not mass. So i dont think it would be called a Mass Air Flow sensor...unleess its like some kinda hybrid that does both...
I know some Flapper styles have a bypass passage for high pressure situations(normally backfire to the intakemanifold) not sure if it would work for boost.ariesdude wrote:I think the flapper type in SOHC is called MAF because it estimates the mass of incoming air. It has an extra temperature sensor for the intake air. This temperature value at atmospheric pressure could be used to calculate the density of the air. The trap door already calculates volume. Mass = density * volume
IMO The trap door type sensor (without spring modification) may not be suitable after turbo because the door could be kept open by air pressure which will tell the ecu that more air is going in than actual.
My setup will be on a B6 DOHC
on the DOHC four put the MAF before the turbo. it is not made for boosted applications. you will screw it up and it will not work if you put it after the turboJoey's mx wrote:ok again what would be the best placwe to run a DOHC type maf(hot wire)
Will the boost pressure blow the maf after the turbo??
