Tap size for pyro probe??
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Lead Driver
Joined: Oct 2004
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From: Columbia, MO
Tap size for pyro probe??
I ordered up an Autometer pyro kit from Garrett at BCPD (by the way --> look for a company name change coming from him soon!!), and headed off to the store to purchase a tap for the manifold. Ran into 2 taps, not sure which one is correct. 1/8"-26 & 1//8"-27, both NPT taps. Which one do I need?
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Joined: Jan 2006
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From: Houston, TEXAS
Just a suggestion...if your detail oriented (or **** as friends call me
), thread the tap in about half-way the length of the threads, then and start fitting (one complete rev at a time) for proper depth placemant of the probe. It should be fitted at 6-7 thds. down from the wide end of the tap.
), thread the tap in about half-way the length of the threads, then and start fitting (one complete rev at a time) for proper depth placemant of the probe. It should be fitted at 6-7 thds. down from the wide end of the tap.
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Just finished up my autometer guage install/ dp chip and just got back from a test run. Yes you use the 1/8-27 with a size R drill bit. I just bought that stuff yesterday. Truck ran like a raped aped when the turbo kicked in. The only thing Im not really caring for is that it seems there is a lagging period before it gets up and goes, I dont know if it is normal or what. It seems like a dog till about 17-1800 rpm, then Holy sh**!!!
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Lead Driver
Joined: Oct 2004
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From: Columbia, MO
Originally Posted by generalee31184
Yes you use the 1/8-27 with a size R drill bit.
Help me out here. I've never heard of a size R.Edit: Ok. I found out that a size R bit is 8.6106mm or .339" but where do I get one?
Last edited by jtharvey; Feb 25, 2006 at 01:58 AM.
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There is a such thing as letter drill bit sizes, they are all that more closer to the size that is needed for the hole. I went to my local Fastenal store and said I need a drill and tap for this 1/8" NPT fitting and they looked in the book for the tap and it gave what size drill to use with that tap (size R drill). I dont know if you have a fastenal where you are but here, it is a store that sells all kinds of tools, piping, shop supplies, specialty items. They are most shops local supplier for hardware and whatnot around here.
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Lead Driver
Joined: Oct 2004
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From: Columbia, MO
Originally Posted by generalee31184
There is a such thing as letter drill bit sizes, they are all that more closer to the size that is needed for the hole. I went to my local Fastenal store and said I need a drill and tap for this 1/8" NPT fitting and they looked in the book for the tap and it gave what size drill to use with that tap (size R drill). I dont know if you have a fastenal where you are but here, it is a store that sells all kinds of tools, piping, shop supplies, specialty items. They are most shops local supplier for hardware and whatnot around here.
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