Yes polished is best I have learnt! Just like ITB's are polished!
The atomization comes in with the fuel,so at the end of the IM runner ports,where the injectors squirt fuel into the runners,that's where ya wanna scuff up with some 120 grit to help atomize the fuel.
Looks tops.Can we get one more photo,looking straight down,so we can see the thickness of the butterfly plate and the holding bracket,say 30cm away,then we can see the whole deal
I would like to get those screws flatter,but will just leave them as we took a lot off the rest!
A 60mm TB is too much for a stockish d but I feel this boring out will free up some airflow and will hopefully work aye!
We are putting Tim's y4 IM and TB on his y7 tomozza!!
Pic was added above.The centre part is far far thinner,therefore allowing more air in but not too much,like a 60mm TB or anything,just a nice lil' increase
What do U think Alex,will it flow better than the stock one?
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