Subject	These gauges are more accurate / consistent than you think.
Posted by	OverZealous (CT) on October 26, 2014 at 9:07 PM
	This message has been viewed 292 times.
In Reply To	Better off buying one for serial testing of engine posted by ZXoltan on October 26, 2014 at 09:01 AM
Message	I recognize your concern but thanks to the graciousness of Seb at SpecialtyZ I was able to do a back-to-back comparison between my Actron and his Snap-on fuel pressure gauges and they were spot on the same, both steady state and transiently. And that's after some rather extreme handling of my fuel pressure gauge as you might notice in some of my other VTC related videos. YouTube Actron versus Snap-on Fuel pressure gauge comparison What this tells me is a compression test using two independent gauges of good working order will yield consistent and accurate steady state results. There might be a little less precision using two different gauges in a leak down test but likely not discernible. Reliability, or how long these gauges can be expected perform in good working order I have no idea. Bernie seems to imply these gauges can remain in good working order for over 10 years. I believe most gauges used by folks on this forum are much less than 10 years old such that comparing independent gauge compression test results are valid. OverZealous (CT) My General posts (click) My Technical posts (click)
Follow Ups	Cylinder Compression Tester Recommendation? - OverZealous (CT) 19:26:54 10/24/14 The one in your picture will be fine. - dogpile 20:14:22 10/24/14 This guy disagrees. - OverZealous (CT) 20:35:25 10/24/14 If you want quality, buy a Snap-on set - ttsmokin 21:11:45 10/24/14 I like Snap On as much as the next guy but that's a pricey - Bernie (NoVA) 22:40:52 10/24/14 Snap on is insane for a occasional mechanic. (n/m) - Antihero 17:23:35 10/27/14 Usually, but I sprung for their Valve Keeper Installer Tool - OverZealous (CT) 18:21:35 10/27/14 I have a few OTC items - - BoneZ (MD) 21:17:09 10/24/14 I'll 2nd the OTC in the 1st link. I have it and love it. - PiotrC70 23:57:19 10/25/14 Dunno, we have 2 of those pictured at our shop. - dogpile 22:58:20 10/24/14 I wish you the best of luck in attempting this process as - Ash's Z 01:50:12 10/25/14 I use air to hold valves up to replace seals all the time. - dogpile 07:28:32 10/25/14 Yep. Worked fine for me too. (n/m) - Evan_Wright (Ca) 08:07:53 10/25/14 Yea, I was leaning in that direction.. - Ash's Z 09:36:27 10/25/14 Here's the background and answers - OverZealous (CT) 10:18:36 10/25/14 I have used this method many times and it works just fine. - whamo 10:55:05 10/25/14 Hours plowing the internet reveals Actron T-handle extension - OverZealous (CT) 10:38:19 10/25/14 I've seen that t handle... - BoneZ (MD) 14:18:22 10/25/14 Hey Taylor - Turbodog (CT) 14:50:31 10/25/14 Right! Thanks for the warning. - OverZealous (CT) 15:52:38 10/25/14 That's the correct method and also the same method for - SammybTT(TN) 20:06:46 10/25/14 I was just thinking TDC will stop the valve - Turbodog (CT) 08:44:22 10/26/14 eh...not quite - aliaZ 09:01:06 10/26/14 Re: eh...not quite - Turbodog (CT) 14:10:49 10/26/14 Not so fast guys - OverZealous (CT) 18:58:21 10/26/14 no worries on the valves hitting the piston - aliaZ 07:22:41 10/27/14 Very true. Cams need to be removed anyway - ZXoltan 11:07:40 10/27/14 I think you're going to find that the T- handle extension is - PiotrC70 12:20:45 10/26/14 YOUR RIGHT! Need to "Whip out my big 10 inch" - OverZealous (CT) 20:30:17 10/26/14 no problem. On the OTC kit, I've honestly found that the - PiotrC70 12:43:27 10/27/14 FYI. Autozonee loans out the OTC tester for free. - Sportzcoop 23:00:56 10/25/14 Better off buying one for serial testing of engine - ZXoltan 09:01:47 10/26/14 These gauges are more accurate / consistent than you think. - OverZealous (CT) 21:07:20 10/26/14 Interesting. Thanks for the input. - ZXoltan 10:55:44 10/27/14 Re: Interesting. Thanks for the input. - OverZealous (CT) 18:04:13 10/27/14
Post a Followup	You cannot reply to this message because you are not logged in.