Subject	Is your OEM knock control in spec?
Posted by	zromtech on February 20, 2015 at 11:48 AM
	This message has been viewed 469 times.
In Reply To	Rod bearing service life:a long-term review of my experience posted by Ash's Z on February 20, 2015 at 06:24 AM
Message	I've seen your 740cc chips, and noticed you chose to retain the OEM knock control functionality (unlike JWT who completely remove it). However, it appears you are missing a couple important knock-control related engine load (TP) parameters. (i.e. they are still set for 370cc injectors). This causes the knock control system to malfunction and operate only about ~25% of the time vs. what it should for an in-spec vehicle. This means that the ECU can't pull timing when it actually needs to (i.e. for changes in weather, altitude, etc...), and can result in detonation related engine damage like you are describing.
Follow Ups	Rod bearing service life:a long-term review of my experience - Ash's Z 06:24:41 02/20/15 Why not just run less aggressive timing to lower - The Devils Z 08:14:52 02/20/15 I've been running 18 degrees of total advance at full load - Ash's Z 11:54:37 02/20/15 You can have gradual detonation without hurting - The Devils Z 19:26:49 02/20/15 i use the JS knock box you can hear knock that you can not - Dane (Houston) 18:52:13 02/23/15 Re: Mobil 1 - Hiram 08:40:41 02/20/15 Hmm. (n/m) - BannonZ 09:02:53 02/20/15 I dont think Ash mentioned anything about the EP oil - ZXoltan 10:44:19 02/20/15 C&D Recommends Changing Your Oil at Least Twice a Year - flashstar 11:53:40 02/20/15 You're correct. Oil's life is measured not only by mileage, - Hiram 00:11:56 02/21/15 I change the engine oil every 3K miles bud. Keep in mind, - Ash's Z 11:57:26 02/20/15 Wear could be worse on the 6th in general but good oil - flashstar 12:01:30 02/20/15 So if Mobil 1 15K mile oil falls back to a manufacturer's - Hiram 13:37:49 02/20/15 people say all sorts of crap based on nothing but suspicion (n/m) - LJZTT 13:52:49 02/20/15 Truth! (n/m) - Barry (NJ) 14:20:06 02/20/15 my life at work .. probably the best comment I have - The Devils Z 19:20:22 02/20/15 I would quit a job like that, lol (n/m) - Hiram 23:47:28 02/20/15 I wouldn't deny someone's experience with a product, but - Hiram 00:02:18 02/21/15 it has nothing to do with fine print vs marketing print - LJZTT 13:11:42 02/22/15 I will tell them to tell their mechanics what you said. (n/m) - Hiram 02:21:30 02/26/15 Like I said, best of luck :) (n/m) - Hiram 13:41:37 02/20/15 BTW, I'm not using Extended Performance lube. (n/m) - Ash's Z 16:15:27 02/20/15 Understood. Good luck with it. (n/m) - Hiram 23:48:16 02/20/15 Do you know if shimming the oil pump pressure relief valve - ZXRider 10:47:52 02/20/15 There was no indication of that being the case. I caught - Ash's Z 15:27:57 02/20/15 Do you think this feeds back to #6 running hotter? - Schmeal (NV) 11:05:23 02/20/15 Your proposal is based on piston sieze which I am sure is - Ash's Z 16:18:57 02/20/15 One of the best "knock boxes" out there... - kickerzx 17:53:30 02/20/15 Like the post and timely.... - Z ONLY1 11:11:25 02/20/15 Is your OEM knock control in spec? - zromtech 11:48:05 02/20/15 even if this is true - the OEM knock control only works - The Devils Z 19:15:35 02/20/15 His thread on the subject back in 2013... - Ted (92TT) 20:26:13 02/20/15 Re: even if this is true - the OEM knock control only works - zromtech 11:08:16 02/21/15 Interesting - maglito 21:51:36 02/23/15 What EMS? - bartz32tt 12:06:06 02/20/15 Which EMS can write specifically to an individual injector?? (n/m) - RZturbo 20:41:28 02/20/15 Most decent ones can... (n/m) - kickerzx 05:45:08 02/21/15 Do you have a UOA done at each oil change? - Tanley 18:49:33 02/20/15 I run 20W50 - RZturbo 20:54:40 02/20/15 Do you run 20W50 in the winter also? (n/m) - sak01 11:02:20 02/21/15 The z is normally garaged - RZturbo 20:35:26 02/21/15 I really like M1 5w50 (n/m) - Polish 02:33:21 02/22/15 Re: Rod bearing service life:a long-term review of my experience - Bigwill837 08:25:10 02/21/15 You went with 0.0015" bearing clearance - -Grimm- 09:56:13 02/21/15 seems a bit tight to me - aliaZ 17:43:19 02/22/15 2nd (n/m) - John (MD) 15:36:57 03/01/15 Ash, exactly which oil are you using? Any sampling? - SMAZ (OKC) 12:23:50 02/22/15 Thanks for sharing your findings Ash! (n/m) - maglito 21:52:47 02/23/15
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