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Drilling for map sensor barb

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Old Apr 25, 2014 | 01:19 PM
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Drilling for map sensor barb

I am going to be drilling a hole for the fitting to supply vacuum to my map sensor on my tpi plenum. Do I have to use a special tap or anything for a 1/4npt fitting?
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Old Apr 25, 2014 | 02:44 PM
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Re: Drilling for map sensor barb

yes a 1/4 npt tap
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Old Apr 26, 2014 | 07:48 AM
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Re: Drilling for map sensor barb

Why so large? A 1/8 fitting should be more than sufficient.
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Old Apr 26, 2014 | 01:05 PM
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Car: 85 Iroc-Z
Engine: 383 TPI Procharger D1SC
Transmission: TKO600
Axle/Gears: Strange S60 3.73
Re: Drilling for map sensor barb

I thought that was the factory size. I bought used original ones and the seller listed them as 1/4 npt.
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