Throttle body's done correctly are more then just a rotating door.
The tolerances, material, all the little parts used to make it work.
Plus the time and energy going into the design.

 

oh come on. be realistic, its not a torque converter, its about the most mechanically simple part on the truck.

 

I am being realistic.
I have designed them.
Choose wrong materials it will stick.
Wrong bushing (if they used one) will wear out. Spring tension, cam angle,
Blade angle once fully open. Blade angle once closed
As in any part including a convertor it's about how it's put together materials used and the part list used. Not to mention the attention to detail.
Glad the ones you picked up worked. Doesn't mean the part is not worth the money paid by others.

 

Back in the day throttles were a simple part. Now they are performing lots of unconventional tasks in response to torque requests from different engine software features. Not only that, but in the event you are running speed density on modern vehicles and your MAP sensor dies, the engine can still run because you can estimate manifold pressure based on throttle position and RPM. Manufacturing tolerances and throttle motor response are more important than ever.

 

Like I said, I bought the cheap chinese knockoff for mock up purposes.

The throttle blade will not close all the way, either due to the machining inside the throat or the shape of the blade.

You can not bolt up the IAC because the hole was machined too small.

You can not bolt up the TPS because the holes are in the wrong location.

Pure garbage.

I could easily see one of these getting stuck wide open and someone not having a good day because of it.

 

Winner chicken dinner

 

thats why we all closely inspect our parts before installation i guess.
my first tb i had to drill for the iac to seat properly but worked fine after that.
second one went right in.
i usually will remove tb blade screws and red locktite them and adjust the blade to seat properly.
10 minutes of work for $300.

 

I have learned too many lessons the hard way. I would rather spend the extra cash for quality parts that i know have a good reputation as reliable.

 

Even older Professional Products throttle bodies used delerin or plastic bushings on the throttle shaft. They wore away and I could never figure out why the truck wouldn't idle smoothly. This was on a Ford...but still...replaced the throttle body with an Accufab and the problem was magically fixed.

 

Well I'm throttle by wire and I already have 90mm setup sitting in my garage, I don't even know why the 102mm ever even came into the conversation. Not that I care. Carry on!