Well uhhm.. I kinda got 8 beers deep and decided to port my TB
I might have gone overboard a little. Have a look, I think i went to far on the upper edge corners where it used to be flat.
I have a spare buts its an s5.. this is an S4 not sure if they swap

 

Looks good to me.Now fill in the 2 holes from the other throttle plates and you are set.
How's your head??..(hiccup!)

 

Your best work is done with some beer......looks ok to me see how it performs and tell us

 

drunk? 8 beers? sounds like you need to get that tolerance up! although you would be a cheap date... lol

 

Yeah we have pretty good beer here in MT, Bayern Faceplant @7.5% just tipsy I spose.
Theres a couple holes on the top edges i was concerned about, like pin holes.
Im not sure if its porosity or I went to deep. Its the same two pin holes on each side. Ill test for vac leaks when i get it runnin. Its going on a bridge port with stock intake. I hear it doesnt flow well enough for a bridgy.. well half bridge, so Im going to smooth out as much as i can to help it out a lil

 

that porting looks good enough, I'd work with it!

 

doesn't flow well enough? hmm. i've put out similar horsepower from a series 5 TII as comparable FD setups with an unmolested stock S5 TII complete intake system.

so i'm calling BS on the need to do anything.

https://www.rx7club.com/build-thread...tuning-983611/

might have bumped it just over 500 but that is a negligible difference and airflow isn't an issue with boost peaking below 4k and still pulling power to over 9k, while i cut it off before that(the dyno figure was taken to 9k, last 500 RPMs is mapped slightly rich). a good turbo makes all the difference. that example was a full bridge on all 4 ports.

the bridge is going to be semi lumpy on the street no matter what you do. on and off acceleration transitions will be a little snappier but peak power really won't be affected much, not something you really would want on a street driven bridge anyways as they are already quite like a light switch.

 

Theres a couple holes on the top edges i was concerned about, like pin holes.

If it is just pinholes into the coolant passages I would think it would be fine to run with coolant nipples capped off.

I suppose you could go crazy and backfill the coolant passage with some low viscosity epoxy or something and clean up any dribbles to the TB face.

If there are pinholes think about how thin the aluminum is in those areas.

 

If you get too agressive you can open up passages in the casting. Use a 90deg pick to poke at suspect areas to confirm they wont collapse. JB weld works fine if your not using stock coolant route in the intake.

 

Some info is due.. Im half bridging a S4 NA setup, and this is a NA S4 throttle body.

I was lookin at my turbo TB and its alot different.

The NA TB the coolant only goes through the thermowax, so I dont have to worry about that.

Im shootin for low 200's HP. Ive been thinking about getting my manifold extrude honed,but havent found anywhere close or anywhere else thats in my price range.

Im just trying to pick up flow where I can, exhaust is covered, so now im just working on intake, and fuel..Stock TII pump or supra or FD pump enough?(460 primary 550 secondary)

I poked around with a seal pick and it didnt collapse, the holes seem really shallow like porosity. Its just odd that its symmetrical on each side
Rebuild and porting starts this weekend...finally

 

Jb weld the front and backside of it, then finish the porting. It gets very thin there. It has happened to me several times. Just make sure its rough where u will be applying jb weld so it has something to grab onto.

 

I've done worse things while drunk..