hey guys, I've recently bought a house so my fundings kinda slim for the balt right now. I've been lookin for some cheaper performance mods. would larger injectors be of any performance boost on a stock 09 lt? I'm also lookin at portin and polishing my tb, I've got a mind for detail and am planning on taking this on my own. but I was wondering if knife blading the tb plate is really a huge benefit or just makes that plate weaker, I've done some research with little results so I was wonderin if anyone knew.

 

No on the injectors, you don't need the extra fuel bigger injectors can supply until you add more air, like uber NA or f/i (there are other reason but essentially, stock 2.2ls does not need and can not benifit from larger injectors) . A PnP on a TB may net you something - if it is a really rough surface. You don't want to take away to much material. There have been a few members that took to much out and now they have idle issues. PnP on our TBs is more about creating a smoth wall for the air vs removing a lot of material. I don't know of anyone who did anything to the plate so I can't really speak on that. I did a PnP on my tb, came out ok, next summer I might clean it up if I'm bored.

edit:TB port how-to in our great how to section...:
https://www.cobaltss.net/forums/show...ht=port+polish

 

Thanks for the info. What compounds did u use? I'm looking to do this tomorrow.

 

Honestly, I had a sand bit that came with my dremel, I went to town on the green areas. I then when over it with 200,800. Mine is not how it should look because I did this @ 3am one night cuz I was bored. If I do it right, I would go 100ish,400, 800 until its was shiny and looked smothe aswell as actually being smothe.

 

ok guys. I did this two nights ago, and I'd say it came out very well. I'm still working on pictures but I did notice a difference.
Now this picture sucks but this is what happened when I went over it with a wire wheel attatchment on my black and decker rtx

it was an easy fix but for some reason the wheel just pitted and made the inside look worse than when I sanded with 120 grit sandpaper.

and ths is my finished product. I'll have better pics when I get a camera.

 

the knifebladeing the tb plate helps some on the lt1 & lt4 engines. i doubt it would net much of a gain at all on the 2.2 since its not even half the size of the 350 sbc that barely gains anything

 

ah. gotcha. thanks. and I did notice a large gain from doing this. but as stated in most everyone's posts about this. results may vary.

 

ok and just a question... did you have oil pooled up in your intake manifold?

 

Pooled? Like if you took it out and shook it around or tipped it over oil pours out? I can tell oil has been in mine but I never had any pour out.. You should maybe invest in an oil catch can but it sounds like there might be an issue? I don't know if thats a serious issue but I don't remember anyone ever saying hey, oil is pouring outta my IM guys, come and see! IYKWIM..

NWAE's thread (some pictures are gone): https://www.cobaltss.net/forums/show...ight=oil+catch

Other mics pics of catch can set ups: https://www.cobaltss.net/forums/show...ight=oil+catch

 

I didn't have that issue because I don't have that tube connected to my intake from the motor. it's kinda useless and just blows oil and hot air into the motor.

 

not really pour out just about a 1/8 inch in the bottom of it

 

so did you ever get a camera? lol im still waiting on pics. if you noticed a big gain i will try it... did you knifeblade the plate? also did you use a dremel to smooth it out or sandpaper and elbow grease?

 

ha sorry. it's gonna be after christmas that I get a camera. no knife blade on the endplate. I used a dremel with a polishing bit and rubbing compound to smooth it out. it worked really well. I'll have pics in a few days boys. I noticed a faster throttle response, and I did get a little more throaty tone. I really like what happened with the work I did.