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This is my attempt at doing the TBI modifications listed on this great site.

http://www.thirdgen.org/newdesign/tech/ultimatetbi2.shtml

NOTE there are a lot of pictures and if your a dialup internet surfer then this page will take a while to load.

First I took a bone stock throttle body that I am using on the Budget Vortec project.

UTBISTOCK1.jpg (47960 bytes)

UTBISTOCK2.jpg (46937 bytes)

UTBISTOCK3.jpg (39359 bytes)

Next I ground down the ridge around the top of the throttle body until the top of the TBI is nice and flat.

UTBIMOD1.jpg (42407 bytes)

I then ground down the throttle shafts by 50%.  The photos are of one side so that you can compare to the stock side. I used a Dremel tool with a carbide tip in it to do the grinding.

UTBIMODC.jpg (30449 bytes)

UTBIMODB.jpg (34342 bytes)

UTBIMODA.jpg (36486 bytes)

Lastly, I polished the throttle bores.  Some say polish some say don't.  Mine didn't look too hot so I opted for the polish.

UFINISHED1.jpg (39755 bytes)

Ufinished2.jpg (38335 bytes)

So that is the ultimate TBI mods and it took me a little over an hour to accomplish.