Subject	Stock cas sucks. Even with the 24-1 tooth wheel the issue is
Posted by	NUTTZ(EPTmotorsports) on April 24, 2016 at 5:16 PM
	This message has been viewed 625 times.
In Reply To	He hadn't started tuning for the NAWS yet. (n/m) posted by jmw300zx on April 24, 2016 at 02:58 PM
Message	The ecu is referencing the crankshaft position from the camshaft sensor. There is a belt between the the two and because of that the cas cannot provide an accurate location of the crank shaft due to the belt tension varying over the rpm band and therefore varying the location of the crankshaft to the camshaft, even if it's just a couple degrees as you can see it makes a difference. Sound Performance figured this out on Elliot's single turbo Z that just made 780 on a stock na block utilizing the Proefi system and a 12 tooth crank trigger wheel. I'm currently developing a trigger wheel kit utilizing a vr sensor since we are currently doing 3 high Hp Z build all on Proefi's and don't wanna run into the issue.
Follow Ups	Tuning v1.0 - Madhatter10-6 11:45:35 04/24/16 Look at your RPM trace from your pc log (if you made any) - kickerzx 13:44:12 04/24/16 Oh. and great work :) (n/m) - kickerzx 13:51:19 04/24/16 Cool. At least you didn't blow any welds:) (n/m) - Boosted1 14:27:08 04/24/16 He hadn't started tuning for the NAWS yet. (n/m) - jmw300zx 14:58:45 04/24/16 Stock cas sucks. Even with the 24-1 tooth wheel the issue is - NUTTZ(EPTmotorsports) 17:16:26 04/24/16 Interesting. Any idea when this will be out? - Madhatter10-6 17:59:22 04/24/16 I've been preaching about this for a good while now.. - kickerzx 05:12:15 04/25/16 I am working on a 60-2 trigger for ultimate resolution (n/m) - volcomstone550 10:25:56 04/25/16 madhatter which cas wheel are you using? Since the cas is - NUTTZ(EPTmotorsports) 12:58:03 04/25/16 I have a 95 CAS - Madhatter10-6 13:30:53 04/25/16 Condition of spark plugs? (n/m) - Bernie (NoVA) 19:59:22 04/25/16 Yep. We've seen it happen on the dyno. Swapped plugs - MixManMash 20:23:29 04/25/16 plugs usually crap out based on load, not rpm... - kickerzx 02:17:35 04/26/16 Good question. All I can say is that I haven't noticed any - MixManMash 08:53:13 04/26/16 No, see thats the thing. Unless you know what to look for.. - kickerzx 12:21:21 04/26/16 Oh, and looking at your modlist i am willing to .. - kickerzx 12:43:22 04/26/16 I'm not complaining about losing out on power currently. - MixManMash 20:55:51 04/26/16 no. i tried. had a greddy belt. no difference. (n/m) - kickerzx 23:30:07 04/26/16 its the reliability issue that should bother you, not the... - kickerzx 23:34:24 04/26/16 but of course.. depends on your tune.. (n/m) - kickerzx 00:28:16 04/27/16 Definitely not tuned at the ragged edge and with safe - MixManMash 18:42:21 04/27/16 2nd. Throw in a fresh set and test again (n/m) - vorpalZ 08:19:48 04/26/16 maybe 500 miles on them... - Madhatter10-6 08:43:26 04/26/16 Also make sure you havent got a limiter of some sort - kickerzx 12:46:19 04/26/16 thanks...I checked - Madhatter10-6 14:20:55 04/26/16 I agree. Not nessesarily trigger design related but its - kickerzx 14:55:35 04/26/16 If the higher RPM is exciting a harmonic in the t-belt, - black300zx 11:09:32 04/26/16 that's what I have in my Z, Electromotive Tec GT - nicky_z32 16:00:28 04/25/16 pics of setup? (n/m) - volcomstone550 20:36:52 04/25/16 /hy·per·bo·le (n/m) - Bernie (NoVA) 00:05:53 04/26/16 cool (n/m) - BoneZ (MD) 20:52:21 04/25/16
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