64mm

45mm





This is one of the best mod you can do!!!
It's the TB of a Bmw Z3 (Bosch)
I prefer it to throttle controller or new intake manifold...
The car runs like a diesel with 6000 rpm!
The first noticeable increase is the faster revs of the rpm.
I think there is a great increase in torque and hp too...

 

Tell us more. How did it bolt up? Do the factory electronics just bolt into place? Are you planning on doing any before/after dyno testing?

Thank you for the info.

 

Ditto above. Tell us more!

 

tell us more!!

 

more info please!

 

tagged 4 interest.

edit: i dont think edm fits have drive by wire.

got my hopes up for a second.

 

Throttle Bodies


I was going to see if i could send mine in even though they only do B and K series throttle bodies.

it looks totally stock from the outside and the dealer would never know.

 

Check the TB Kelsey. Its got the DBW plug.
Its the same TB as the US Fits.

Im interested in how the car knows whats going on with a BMW TB on the car?
Unless its a BMW butterfly in a Fit OEM TB.

I have a spare TB from what I ported my OEM. Hehh...
Ryan, I was going to send mine to that guy. He said he could do it.

I think that was the guy. Hes all over Honda-Tech?

 

dont know if he is all over honda tech but i ask people on honda tech and no one responded with any info.

having warranty sucks thats why i wanted to send mine in. Stock look and dealer would never know and he could do the same to the IM

 

It's easier than you think...
same plug;
same bolts.
These trhottle bodies are made by Bosch, so you don't have to be worried about nothing: they work in the same way!
The only thing you have to build is a gasket between intake manifold and new throttle body (I used a can of coke!!!! It was the fist thing I founded in my garage) and a conic joint inside new TB from 64mm to 45mm (I used my wife's plastic breadbord).
I'll post other pictures tomorrow

PS I forgot to say that this TB hasn't water passages and that I'm not going to do dyno test before finishing all my mods!!

 

Could you tell us what engine the Z3 had that this came from?

thank you

 

I ported my OEM, an act of stupidity. The idle got high and fluctuated like a older Honda with a bad TPS.
But damn the car pulled nice. I barely ported it too.

I bought an OEM for cheap. (I think theyre $400)

I tried to take it into Honda saying the idle got high. *LAUGHS!*
They inspected it for an hour and didnt even find out it was ported. They noticed my coolant lines being bypassed and blamed it on that.

And yes, as asked above.... What year BMW? Im so doing this.
Theres no Check Engine Lights? Everythings fine. Car idles and drives the same?

 

Porting the OEm TB without getting a larger butterfly will cause high idle problems. ....

64mm is great provided the hole in the plenum is that large otherwise you'll be adding som major turbulance to the scene... if the Plenum is lrger than the butterfly then rock on!!!!!

 

2002 Z3 2.5i
Thats my guess as of where the TB comes from. $250 new.

 

I would like to know as well...

 

great, looks like ill be needing another tune

 

bump for interest

 

Has anyone proven that the stock TB is restricting flow? From what I have read, the DBW does not even allow full opening of the butterfly, so how does this help. I want dyno charts and AF measurments.

 

I have a question about the dbw. I remember reading somewhere about the k24 in tsx's that where being moded and had the dbw disabled and the car worked fine. I'll try to dig up the article, but can't the dbw just be bypassed and work like a "normal" TB?

 

If you get a larger TB, you still require a reducer (coke bottle in this case) and end up restricting the airflow anyway as it goes into the manifold... do you not?