![]() ![]() Have a look at the e46fanatics thread i linked to above, I think he did the TB bore and it wasn't really successful, makes sense really as i don't see how this is a bottleneck in the system. Without boosting it one way or another your not getting much I chose nitrous as it was cheaper than boosting and was a bit of a novelty really Im looking into getting the stock throttle body bored out and a bigger plate put in on my 330 but not sure what gains it will give really I might see if the mesh on the back of the maf pulls of to open up more surface area but cant pull the front off as its used for straightening the flow over the sensor parts They are not that tunable without deep pockets IMO cams are really expensive for the gains but I imagine the car would feel a lot bettor for it but you will need a map that raises the rev limiter to make use of it
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