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Another DIY ported TB

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Old 11-26-2006, 11:29 PM
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Default Another DIY ported TB

Ported the stock throttle body this weekend. How do you guys think it turned out? I did the port work, took it for a test drive, then did the bump stop mod. Seems like the porting gave better throttle response but the bs mod gave the most increase at WOT. About what I expected. Pretty easy to do but a little tedious. Included a couple of before and after shots. It could use some more polishing but I'm was feeling lazy. The back side of the throttle shaft looks like also.

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Old 11-26-2006, 11:35 PM
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Nice job.

How did you go about porting it?
Old 11-26-2006, 11:37 PM
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Looks good. Its your personal choice if you want to polish it or leave it like it is. Mine, I polished it like mirror finish.
Old 11-27-2006, 12:43 AM
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Looks damn good
Old 11-27-2006, 08:05 PM
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Originally Posted by Snuffles
Nice job.

How did you go about porting it?
Thanks. I just used a dremel on the TB and used a bench grinder to knife edge the throttle blade.

Last edited by soulless; 11-27-2006 at 09:32 PM.
Old 11-27-2006, 08:49 PM
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I still have yet to port a TB using a Dremel, I may have to give it a try.
Mind posting a pic or a link to what bit you used?
Old 11-27-2006, 09:31 PM
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Originally Posted by Snuffles
I still have yet to port a TB using a Dremel, I may have to give it a try.
Mind posting a pic or a link to what bit you used?
I started off using 60 grit sanding drums, then 120 drums. Smoothed everthing out by hand using 400 grit sandpaper and a scotch-bright pad. You have to change out the 1/2" drums often or it will take you forever. They do have a cutting bit available but I thought it might be a little "aggresive" for my first time doing it.

cutting bit

sanding drums
Old 11-27-2006, 10:34 PM
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Looks pretty good man!
Old 11-27-2006, 10:37 PM
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looks like you did it before good job looks great
Old 11-28-2006, 11:33 AM
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You did a great job bro. Also that is not the cutting bit you would want to use. At least that's not even close to what i use. I use a rounded sort of tree shaped carbide bit, then either sanding drums or a flapper wheel, (flapper works better and it last waaaaaaaay longer), then 120-600 grit sandpaper, then polishing compound with a cotton wheel, then emory paper then clean it up with seafoam.
Old 11-28-2006, 05:25 PM
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Looks good. Now you just need to cut half of the throttle shaft off and then grind down the threaded side of the 2 screws that hold the plate to the shaft and you're set. Did you do the bumpstop mod while you were at it?
Old 11-28-2006, 08:05 PM
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Originally Posted by 02gixxersix
You did a great job bro. Also that is not the cutting bit you would want to use. At least that's not even close to what i use. I use a rounded sort of tree shaped carbide bit, then either sanding drums or a flapper wheel, (flapper works better and it last waaaaaaaay longer), then 120-600 grit sandpaper, then polishing compound with a cotton wheel, then emory paper then clean it up with seafoam.
Thanks! You're right about the cutting bit but they place I went to didn't have many accessories. After I looked at the website I saw some that would have made the job easier, but oh well, its finished now.
Old 11-28-2006, 08:10 PM
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Originally Posted by Red99TA
Looks good. Now you just need to cut half of the throttle shaft off and then grind down the threaded side of the 2 screws that hold the plate to the shaft and you're set. Did you do the bumpstop mod while you were at it?
I did cut off the front part of the throttle shaft and trim the screws. I even removed some material off the back of the shaft, between the screws and at each end. And yes, I did the bump stop mod while I was at it. I was only getting 4.40 volts before. Is that normal? Seems kinda low to me.
Old 11-28-2006, 09:06 PM
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Looks good, i used the dremel with the flaper sanding tool and it worked great.
Old 11-29-2006, 12:16 AM
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Good job!! Next is polish right?



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