custom stainless intake

[RETed]

Originally Posted by GySgtFrank

I hate to point this out, as you've done so much nice work on it, but how do you intend to compensate for engine movement? Even with solid motor mounts there is a little bit of movement.

+1

I'm sorry, but having that long, honkin' thing hanging off the TB is still mass dealing with vibration - i.e. physics.
Even if you "spring mount" the AFM, that's even more mass...

Also, stainless steel has this nasty habit of soaking heat.
That duct is hanging over the exhaust exit out of the engine.

There's a reason why Mazda designed it as a rubber flex unit.
If they didn't need have to worry about flex and vibration, a plastic unit would've been lighter and cheaper to install.

I agree that your welding skills are top-notch, but I question the practicality of this application?


-Ted

[Pete_89T2]

Originally Posted by RETed

+1

I'm sorry, but having that long, honkin' thing hanging off the TB is still mass dealing with vibration - i.e. physics.
Even if you "spring mount" the AFM, that's even more mass...

Also, stainless steel has this nasty habit of soaking heat.
That duct is hanging over the exhaust exit out of the engine.

There's a reason why Mazda designed it as a rubber flex unit.
If they didn't need have to worry about flex and vibration, a plastic unit would've been lighter and cheaper to install.

I agree that your welding skills are top-notch, but I question the practicality of this application?


-Ted

+2, agree with all that Ted & Gunny stated above. WRT the vibration issue, another thing to consider is that your design will effectively transfer engine vibes directly to the AFM, which most likely will cause your car to idle/run like crap. Reason being is the AFM uses a spring loaded opening (flapper door on S4, cone on S5) to measure airflow. Add vibes (or fail to effectively dampen vibes) to such a design and you can guess what happens to the accuracy of the airflow measurement - it will jitter. Since the AFM is the primary sensor used by the FC ECU to control fuel, measurement jitter is very likely to bugger up your idle/running performance.