I've posted a supplement to the original "Rerouting the Idle Air Pathway" service bulletin which applies specifically to 1987 to 1995 GM TBI units on 350 and 305 engines. It may viewed in the document section at:

www.gadgetmangroove.com/index.php?option...documents&Itemid=429

It is the same process I used to enhance the Gadgetman Groove on my 1995 Chevy Suburban to gain 35% in fuel mileage.

Hey Nick, this is Aron Cheek Gadgetmannebraska. This is great information. I tried something similar the other day and this is the key to these tbi systems isn't it. Thank God for people who do not know the word impossible! I will call you sometime about a 2002 dodge 1500 , magnum engine map sensor vaccuum relocation. WORKS GREAT!!! Aron Cheek Gadgetmannebraska

Hey guys, I wanted to report a mod that I did this weekend following your pdf guidline...and with Tracy's help .

This was on a 94 model 350 (pics below). I grooved it first, then realized a week later that I needed to mod the Idle Air Passageway so pulled it back off and did the mod and added more groove.

The orange on some of the pictures is permanent marker, so you can see the contrast and the groove better.

I used a router attachment and router bit for my drimel and it worked really well for this application and I wanted to share it. I think that I may have made it a little too wide and deep but overall I'm super impressed with the workman ship that I produced using the router attachment.

That said, I still need to practice me grooving!

WWAAHHH! your Grooves look good to me, Wayne. But the rest of the pic's aren't there!

Oh well, just try uploading again. Maybe the 'puters didn't like moving so many at once. Might try loading 4 at a time, add them as edits or just start another post we wanna see 'em!

Glad you're Groovin, Wayne, I enjoyed talkin' with ya!

Tracy G

TracyG wrote:
Hey there Tracy, thanks for letting me know the pics didn't work, I moved them in PhotoBucked after I attached them so they were't at the same URL darn it!

Anyway, everything is fixed in the above post...thanks again!

Wayne
Gadgetman Carolinas

Hey Wayne, XCLNT work and Great pics! This post re-inforces the how-to of this mod. Just Beautiful contouring on all that IAC Trench work...man...! To me this is reference material for this Mod!

So how does it like it now, how does the IAC function modded like this?

I'd think it should get all the air it could want for any situation. Maybe Ron could weigh in on this one...

Would you describe exactly the type/size bit used w/ the router attachment?

Anyway, congrats on very Nice Work!

Thank you, Wayne!

Tracy G