Subject	The orfice is built into the pressure guage itself.
Posted by	AzHeat on November 16, 2006 at 11:07 AM
	This message has been viewed 25 times.
In Reply To	Here's the correct way to fabricate a DIY leakdown tester >> posted by my91z on November 16, 2006 at 09:16 AM
Message	It is not needed. The pressure guage is the same pressure guage used for a compression tester. To calculate pressure % loss is simple math. If the pressure is set to 100 psi and you connnect to the cylinder and now it holds 98psi you lost 2%. Not rocket science.
Follow Ups	My Zcon souvenir... ~25% Leakdown! :) - CaliguyPurdue 11:55:32 11/15/06 What brand tester did you use? (n/m) - my91z 12:03:39 11/15/06 Harbor Freight ;) (n/m) - CaliguyPurdue 12:08:08 11/15/06 Did you read my post yesterday? (link) >> - my91z 12:16:23 11/15/06 Actually, I ran up against the EXACT same problem. - CaliguyPurdue 13:19:48 11/15/06 Yup >> - my91z 13:27:58 11/15/06 More info - my91z 13:36:04 11/15/06 The reason they use two guages with a separate regulator - AzHeat 11:27:25 11/16/06 Even more info - my91z 13:45:14 11/15/06 Final info - my91z 14:48:01 11/15/06 Awesome leg work there! I agree with your - CaliguyPurdue 16:10:44 11/15/06 Cool, hope it works as it should. >> - my91z 16:22:44 11/15/06 The 0-100psi guage i got this afternoon worked great... - CaliguyPurdue 02:56:43 11/16/06 Here is how to size the orifice correctly >> - my91z 12:44:42 11/16/06 Thanks that's good info... - CaliguyPurdue 14:35:03 11/16/06 For a Purdue Engineer you sound clueless. (n/m) - AzHeat 17:52:00 11/16/06 Hey Orfice man that link has nothing to do with - AzHeat 17:50:21 11/16/06 did you do it right? - aliaZ 12:47:09 11/15/06 Besides the gauge shenanigans, it was as close to - CaliguyPurdue 13:22:01 11/15/06 That only applies to #1 cylinder. You sound like - AzHeat 18:33:42 11/15/06 Mmkay... - CaliguyPurdue 03:02:01 11/16/06 Did you ever hear the story of how NASA - AzHeat 14:01:16 11/16/06 Good for them. Small price to pay for data security... - CaliguyPurdue 14:30:34 11/16/06 Not if you use a N0.2 pencil. $1 million back - AzHeat 17:43:56 11/16/06 1M really doesn't go that far in the aerospace industry. - CaliguyPurdue 19:59:45 11/16/06 In the 1960's it does. (n/m) - AzHeat 20:33:45 11/16/06 Just make your own tester. It is so easy it is child - AzHeat 16:38:17 11/15/06 I try not to fab things i can easily buy... ID rather spend - CaliguyPurdue 18:20:46 11/15/06 Yea, sounds like it. You can have easily have - AzHeat 18:29:48 11/15/06 What crawled up your Az??? (n/m) - CaliguyPurdue 02:52:46 11/16/06 He's a moron, please ignore him. - Kenny 09:24:01 11/16/06 Kenny, if you have nothing to contribute STFU - AzHeat 11:10:54 11/16/06 lol, thus proving my point. (n/m) - Kenny 11:22:15 11/16/06 exactly, STFU and stick that in your tail pipe and drive it (n/m) - AzHeat 11:29:03 11/16/06 I'm sorry about what your parents did to you, but don't... - Kenny 13:55:59 11/16/06 I'm sorry your dad didn't pull out. (n/m) - AzHeat 14:09:19 11/16/06 Its ok his dad is almost done... go to a happy place. (n/m) - CaliguyPurdue 14:36:16 11/16/06 So you are an engineer who went to Purdue and - AzHeat 17:46:27 11/16/06 I did and Purdue is. Please post your resume... - CaliguyPurdue 19:54:52 11/16/06 I have empirical experience . I created my own - AzHeat 20:40:30 11/16/06 I trust empirical as well as long as the rationale is - CaliguyPurdue 03:30:36 11/17/06 The regulator on my compressor is the exact same regulator - AzHeat 12:19:16 11/17/06 Here is why the commerical use two guages and regulator - AzHeat 11:30:40 11/16/06 False - my91z 09:13:33 11/16/06 Meaningless? If there is no leak I get 100psi . - AzHeat 11:09:39 11/16/06 Again, clueless. You need the orifice to measure the - my91z 11:48:42 11/16/06 You can't figure out a harbor freight tester and you - AzHeat 11:55:41 11/16/06 Mister Mechanical and aero space engineeer - AzHeat 17:59:17 11/16/06 Here's the correct way to fabricate a DIY leakdown tester >> - my91z 09:16:19 11/16/06 The orfice is built into the pressure guage itself. - AzHeat 11:07:01 11/16/06 You have no clue. Air does not flow through a pressure gauge - my91z 11:46:00 11/16/06 Hey Pressure guage measures pressure via an orfice. - AzHeat 11:53:04 11/16/06 Mechanical pressure guages do not regulate the - CaliguyPurdue 20:04:06 11/16/06 You are right, the orfice which is included does that (n/m) - AzHeat 20:41:30 11/16/06
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