how it works: Mass air flow

[RedGT]

I came across this pdf that explains how toyota mass air flow systems work.
www.autoshop101.com/forms/h34.pdf

 

[jdub]

Been around for a while sport
It is a good basic reference though. BTW - the 7M-GTE uses an AFM, not a MAF.

 

[IwantMKIII]

Been around for a while sport
It is a good basic reference though. BTW - the 7M-GTE uses an AFM, not a MAF.

unfortunately.....

wish the Turbo A was prevalent....then it wouldn't be an issue :nono:

 

[jdub]

Nothing that can't be worked around with a speed density set-up

That Auto Shop article is still useful...the Karmen Vortex AFM is explained starting on page 7. Pretty easy to see why you never want to use carb/MAF cleaner on it...screws the optics up.

 

[Supra469]

That's a good read.

 

[slidebabyslide]

nice, i read this before it's been a while.

 

[ForcedTorque]

I found it very informative. Thank you!

 

[Nick M]

There is a reason car magazines redo some of the same things every few years.

 

[IwantMKIII]

Nothing that can't be worked around with a speed density set-up

That Auto Shop article is still useful...the Karmen Vortex AFM is explained starting on page 7. Pretty easy to see why you never want to use carb/MAF cleaner on it...screws the optics up.

true...but would've been much easier to convert to a TURBO-A setup then adding on a piggy-back system

 

[suprarx7nut]

Informative and concise. Good read, great post!

 

[A70BoosTFienD]

i know this thread is kinda old but hopefully this will help someone.

just to be sure ive been hearing that the pre 89 afm aren't karmen vortex is this true?
i have an 88 turbo with a lex afm and im 99% sure its karmen vortex but what bout the stock afm for the pre 89's?

 

[gaboonviper85]

i know this thread is kinda old but hopefully this will help someone.

just to be sure ive been hearing that the pre 89 afm aren't karmen vortex is this true?
i have an 88 turbo with a lex afm and im 99% sure its karmen vortex but what bout the stock afm for the pre 89's?

All mkiii turbo 7m becides turbo A run karmen....na mkiii do not....years make no difference.

 

[sk6471]

i know this thread is kinda old but hopefully this will help someone.

just to be sure ive been hearing that the pre 89 afm aren't karmen vortex is this true?
i have an 88 turbo with a lex afm and im 99% sure its karmen vortex but what bout the stock afm for the pre 89's?

All American turbo MKIIIs used the same airflow meters from 87-92. Then the non turbo MKIVs used them. The Lexus AFM is just a larger version using basically the same electronics.

 

[figgie]

true...but would've been much easier to convert to a TURBO-A setup then adding on a piggy-back system

hmm perhaps something for 3p to look at.

Anyone has a turbo A tccs doing nothing?

 

[A70BoosTFienD]

All American turbo MKIIIs used the same airflow meters from 87-92. Then the non turbo MKIVs used them. The Lexus AFM is just a larger version using basically the same electronics.

cool thanks :bigthumb: