well i decided it was time for a small project. i noticed how the upper portion of the inner TB was just a rough cast finish. i looked up online on DIY port and polishing and decided to give 'er a shot.

its not as great as i wanted, but im also a very impatient person. its smooth to the touch (even with a fingernail), but doesnt have a true mirror finish. you can still see a bit of texture, but as stated, its smooth to the touch. Either way, its way way way better than how it was.

i also ground down/rounded the edges of the first "step". there is a small ridge in the transition between where it was rough cast, and where it is factory polished.

 

do you feel any difference????

 

i dont know how much is placebo, but yeah. its a lot more responsive. if you have it in gear and even tap the throttle, it seems to lurch almost instantly. definatly worth doing if you have a rotary tool/attachments laying around. i had to go out and buy a few attachments/security torx, but it was under 30 bucks

 

all of my threads=fail

 

Why?

 

I did this on my Sube and had very good results with an hr or 2 of work! Looks good

The SS/TC looks a lil complicated to rip apart, does anyone know if the ss/tc has the same ridge inside? Id hate to rip it apart for nothing

 

they always get like one response, and then die. ha ha almost every single time. pictures of my car, new mods, new ideas, ha ha almost every time they die right away.

its not as noticable of a ridge as you would think, but its there. and im not sure how hard it would be to get to yours and find out how your tb is

 

BYT turbo whered u get ur little driving smilies lol theyre sweet

 

I have a small forum for friends and I link the images from there. Feel free to do so yourself

~600 Smilies List

Edit: And thank you

 

Hmm, link to this port and polish guide? Is it here?

 

im debating doing this to my lsj one

 

heres mine with dyno #s lsj though https://www.cobaltss.net/forums/show...ight=headgames

looks like you can take a little more off the edges

 

hmmm...wonder what kind of difference a ported LSJ tb will do on my 2.2...gunna try it out this weekend now

 

aahhh just go with the LS4 one lol

 

i wont have money to buy mods for a good while...so any free mods i can do im doing :p like cleaning out my IM, smoothing out the castiing from the blower, pnp the TB...dual pass...some seafoam etc... things that cost time and little money but once i start modding again, im upgrading my exhaust to a MBS one w/borla muffler, ls4 tb, meth(set to activate@10psi), 2.8" pulley

 

a little large

 

dont know if the size of the ls4 applies to the 2.2 like the 2.0...we are a bigger engine, and have more room to fill than a 2.0...so the ls4 could do greater good on a higher dislacement engine

 

did your car go into limp mode when you put the throttle body back on. i am planning on doing this on my car.

 

no. before you take the butterfly out, trace the outline with a dry erase marker. and stay clear of that area. then just smooth out the areas other than the marked area as best you can

 

I started on mine with 80 grit now gonna move up to 500 to polish so far it's looking good

 

Just did mine last night, no pics, but it came out pretty nice. Anyone else get about a 100/200 rpm increase at idle? I didnt touch the area around the butterfly, so I m just wondering if this is normal. All in all, didnt notice that much difference, maybe a slight smoothing of the powerband, but thats about it.

 

Can the ridge/lip whatever you wanna call it be removed to its completely flat straight down to the bottom?

 

eh, you need to retain the lip where the the butterfly closes, otherwise you will have horrible idle problems.

 

Yes you do... My idle is about 1400 now, and the butterfly seems slow to close at times. I ll be trying to find another one soon and porting it differently.

 

So you made it flat down and its messed up now eh? Glad I didn't go nuts then haha.