Usually, this. ^

The rule of thumb is to keep at least a millimeter of flat, untouched edging to keep a seal. There are different ways to "knife edge", by removing material either on one side at a 20 - 30 degrees, or both sides at an even 45 degree, or even "rounding" the square edging.

Edit: and by looking at yours, dont touch the front edge, its the sealing point.

M3 tuners do this, from what ive seen thats why I asked. Its not for power, but throttle response.

 

Ok. better to leave it as it is


Turbo is back in:

 

i thought some honda TBs were:

 

Not to thread jack, but what throttle body is that off of? I read somewhere that people were simply doing this by using simple flap wheels of the same diameter.

 

It could have been maybe few inches higher but if it works…. maybe it isn’t so big deal.


My Miata IAC solution

 

^like

 

how about raising the IM by machine the flange to an angle.

and yes I know, I have to machine the IM nut surface to same angle also.

 

I'm sorry for my stupid question, but where will the injectors go?

 

 

BP's have the injector bosses integrated into the head.

 

AH! See, there lies my stupidity. SORRY! Carry on lol

 

props for photoshopped Simon.

 

I pissed myself lol

 

I machine 5mm off so now it sits an angle


If I bent that ABS pipe out of the way there’s about 1-2cm room for the IM. I think its enough..


Maybe I leave it as it is. If I want to raise it any more I have to buy another stock Miata manifold and cut the flange off it…

 

Intake manifold is close to finish

 

how much material was removed from the manifold? Just curious

 

Not much really. Only section I cut off was below throttle opening so that it won't hit the frame:

 

im getting a fuzzy sensation in my pants.

 

Same here. It’s hard to fit turbo parts when you got huge decent size boner

 

You want to shield the dipstick from the turbine housing, exhaust manifold, and downpipe. Ask me about having to remove my engine because of tiny bits of melted dipstick in my oil.