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Tech Area => General Buick Tech => Topic started by: tb3 on May 07 2014, 10:22:48 AM

Title: stock downpipe elbow porting
Post by: tb3 on May 07 2014, 10:22:48 AM: I've never done one before. Do you remove or port anything else other than that big lip at the exit?
Title: Re: stock downpipe elbow porting
Post by: TexasT on May 07 2014, 11:37:45 AM: I'm not sure but want to see pix of yours so I know what to do to mine.
Title: Re: stock downpipe elbow porting
Post by: tb3 on May 07 2014, 12:00:04 PM: I just did my stock IC inlet but that's pretty straight-forward. only pain in the butt was having to keep cleaning the alum out of my bit.
elbow is steel so it should go pretty fast.
Title: Re: stock downpipe elbow porting
Post by: TexasT on May 07 2014, 12:33:02 PM: Any pix of the i/c?
Title: Re: stock downpipe elbow porting
Post by: Scoobum on May 07 2014, 04:15:16 PM: :cheers:
Title: Re: stock downpipe elbow porting
Post by: tb3 on May 07 2014, 06:46:47 PM: Thanks scoobum! did you just do the lip and some spots there at the exit side?
nothing near the waste gate srea?

I didn't take pics of the IC shave, texas. but it's very straight-forward. I just milled out the radius of the inlet down to about a 1/8". I took a little out of the first bend but not much so not to hurt the integrity of it.
Title: Re: stock downpipe elbow porting
Post by: Scoobum on May 07 2014, 09:01:43 PM: I did a search on TBS and there was a thread on porting the elbow. This was the best pic. The shaded area in red was also trimmed. I believe Steve Monroe once ported these...he'd be your best source of info.
Title: Re: stock downpipe elbow porting
Post by: Charlief1 on May 07 2014, 09:35:51 PM: I would've traded you a ceramic coated and ported 1 if I'd known you needed 1 Aaron. :068:
Title: Re: stock downpipe elbow porting
Post by: tb3 on May 08 2014, 03:20:07 PM: I have a spare that I am going to do. no big deal. I think I'll send a email to stevemon then :cheers:
Title: Re: stock downpipe elbow porting
Post by: tb3 on May 20 2014, 10:44:49 AM: (http://i1104.photobucket.com/albums/h322/stormpatchkid/20140520_092712_zps87a9c27a.jpg)

(http://i1104.photobucket.com/albums/h322/stormpatchkid/20140520_092651_zpse1047f71.jpg)
Title: Re: stock downpipe elbow porting
Post by: phil_long on May 21 2014, 03:17:38 PM: looks great!!! Now port mine. Lol
Title: Re: stock downpipe elbow porting
Post by: TexasT on May 21 2014, 04:06:34 PM: Nice. I guess I need to look into a grinder and some bits. I have a drill press, do you think I could rig something up to mill or just do it free hand?
Title: Re: stock downpipe elbow porting
Post by: tb3 on May 22 2014, 08:42:04 AM: Thanks! I've got about 4 days or so into this elbow........ cause that's how long it took to ship it to Stevemons throttlebody shop, have him port it, and send it back :D :icon_kidra: :rock::rock: :icon_kidra:

Texas T, I wouldn't bother trying to mill it with a mill or drill press. I would just take the ol'die-grinder with a good bit, some safety glasses and hearing protection, and go at it free-hand. Just take care to not make anything too thin.
I could have done this myself, but I'm on a big time crunch this spring finishing up another project. :rock: plus... Steves work always kicks ass! :icon_kidra:
Title: Re: stock downpipe elbow porting
Post by: tb3 on May 22 2014, 08:43:39 AM: Quote from: phil_long on May 21 2014, 03:17:38 PM
looks great!!! Now port mine. Lol

We could do it in a couple months or so :rock:
Title: Re: stock downpipe elbow porting
Post by: TexasT on May 24 2016, 02:07:34 PM: So with this ported elbow is the $185 worth spending on this kirban down pipe? Looks cool and would be 3".

http://www.kirbanperformance.com/product/326/STAINLESS+3%22+Bolt-In+DOWN+PIPE+and+CLAMPS+%282%29+%236568.html (http://www.kirbanperformance.com/product/326/STAINLESS+3%22+Bolt-In+DOWN+PIPE+and+CLAMPS+%282%29+%236568.html)
Title: Re: stock downpipe elbow porting
Post by: daveismissing on May 24 2016, 03:01:32 PM: Our vehicles get scrutinized from time to time so when my CAT corroded I stuck on a 3incher behind the aforementioned pipe. "seems" better....
Title: Re: stock downpipe elbow porting
Post by: Scoobum on May 24 2016, 07:59:31 PM: The Kirbans downpipe leaks like a sieve. I had one...don't bother with it.