Upgrading Throttle body on e30 325i

[JagsK1981]

Hi

I was told to upgrade my throttle body on my sport. Any recommendations on doing this?

Thanks

[Brianmoooore]

What makes you think that the one BMW fitted is deficient in any way?

[JagsK1981]

Was told to do that to get better performance, is that right?

[bss325i]

Slightly better throttle response.

On its own it will barley give any extra power.

[Brianmoooore]

It will only do anything noticeable if the engine is modified in other ways to increase the required airflow through it, such as a capacity increase or a longer duration/higher lift cam, etc.

[bss325i]

I have a 325i with a btb six branch exhaust manifold and a BBR star chip.

I fitted a bigger bore throttle body and there was a noticeable change in throttle response.

The most comparable thing to it is when you press the 'sport' button in a later BMW M car with a fly by wire throttle such as an E46 M3 or E39 M5 and you notice the change in throttle.

[jimbom30cab]

I agree with Barry, the throttle response is quite noticeable. Bizarrely I also got a couple of MPG extra from doing this. The engine also has a slightly more raspier note to it.

[reggid]

its way down the list of things the m20 needs to make power.