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  #1  
Old 01-06-2006, 08:09 AM
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ad0131065 ad0131065 is offline
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Default guage drilling and tapping

Does anyone have experience with drilling and tapping for a guage on the stock V/A's? How easy is it to do?
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  #2  
Old 01-06-2006, 08:19 AM
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Default Re: guage drilling and tapping

it's pretty easy...I did the stock VA on my Xtra. The tricky part is drilling high enough, not to cut into the reg/xchamber threads area and back far enough not to interfere with the LPC threads.
Tools needed...
*Spring-loaded punch (to set the hole so the bit doesn't skip across the surface)
*Drill and bit
*1/8" NPT threaded tap (package recomends bit size)
*Teflon tape
*Gauge

Use the punch to dimple the aluminum. Drill it. Tap it by hand turning the tap. Insert tap into hole...press down with moderate pressure and turn 1/4 turn. Back it out. Turn 1/4 + 1/4 turn, then back it out. Then turn 1/4 + 1/4 + 1/4 turn and back it out.....until you have tapped the hole to the widest part of the tap itself.

The reason you "back it out" is that the tap cuts the thread and creates metal slivers. By backing the tap out, the slivers are cut away and are allowed to fall into the grooves on the tap...removing them from the hole you are making. GO SLOW AND TAKE YOUR TIME
teflon tape the gauge and install.
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  #3  
Old 01-06-2006, 08:26 AM
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Default Re: guage drilling and tapping

what size drill it do i need?
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  #4  
Old 01-06-2006, 09:24 AM
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Default Re: guage drilling and tapping

I THINK you need a 1/4" drill bit. Here for more info:

http://www.ottersccustoms.com/gaugemnt.html
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Old 01-06-2006, 09:29 AM
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Default Re: guage drilling and tapping

If you do to lets say lowes or home depot they sell the tap/drill bits as a set. When i bought the sizes i need they came with the correct drill bit.
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Old 01-06-2006, 09:56 AM
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Default Re: guage drilling and tapping

Here's another good source explaining adding a gauge with most all info needed -
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Old 01-06-2006, 10:46 AM
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Default Re: guage drilling and tapping

Quote:
Originally Posted by chubb0rz
If you do to lets say lowes or home depot they sell the tap/drill bits as a set. When i bought the sizes i need they came with the correct drill bit.
i wouldnt go to home depot, my step dad who knows nothing about tools would be of more help

lowes all the way!
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Old 01-06-2006, 12:48 PM
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Default Re: guage drilling and tapping

Quote:
Originally Posted by bomberpilot07
i wouldnt go to home depot, my step dad who knows nothing about tools would be of more help

lowes all the way!
that depends on the home depot you go to. 10 minutes away from me is a home depot that was rated above all other home improvement stores in the state, and that does include lowes. i go there for everything
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