covertrussian Posted July 16, 2014 Share Posted July 16, 2014 It's odd to see so much knock on such a "smooth running as advertised by Subaru engines" just free reving, never seen it on my inline 4's so was a little worried . Do these knock sensors have an RPM limit where they become useless due to engine noise? On my inline 4 the knock sensor becomes useless after 4800rpm, just too much engine noise after that. 05 LGT 16G 14psi 290whp/30mpg (SOLD) 12 OBP Stock 130whp/27mpg@87 Oct 00 G20t GT28r 10psi 250whp/36mpg 22 Ascent STOCK Link to comment Share on other sites More sharing options...
cryo Posted July 16, 2014 Author Share Posted July 16, 2014 The knock sensor itself is trustable in the higher rpms but there are some other things that must be looked at to conclude if its noise or true knock. All manufactures systems have similarities and differences when it comes to the sensitivity of knock control. Subaru tries to take a very safe approach...if its potential knock they would rather drop timing to adjust, even if it may not be optimum. Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
dawkins20 Posted July 21, 2014 Share Posted July 21, 2014 Possible dumb question, other than loss of efficiency and possibly power, is there any problem or risk to running too little timing? Link to comment Share on other sites More sharing options...
JMLegacy Posted July 22, 2014 Share Posted July 22, 2014 burnt turbo. Exh valves Link to comment Share on other sites More sharing options...
cryo Posted August 5, 2014 Author Share Posted August 5, 2014 bump for helping others out. Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
elpete77 Posted September 4, 2014 Share Posted September 4, 2014 Good post, thanks for the info. Is there something in particular that might cause 10 degree pulled timing under load? AFR seems normal, but butt dyno says many many fewer torques are reaching it. Just changed plugs (1 step colder), checking turbo and vacuum leaks next. Link to comment Share on other sites More sharing options...
cryo Posted September 5, 2014 Author Share Posted September 5, 2014 Hello there, For the car to pull 10degree's under heavy load normally means there is a lot of mechanical noise to trigger the sensor. It could be because of regular noise BUT when its under heavy load I'm more apt to believe something is actually triggering it ie true knock. What was the part number for the plugs you put in? If all was well before the plug change I would look in that direction. Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
elpete77 Posted September 5, 2014 Share Posted September 5, 2014 All wasn't well, I was getting hesitation. Figured I'd start with the plugs and go from there, since I'm at 115k anyway (almost time to change anyway). The hesitation appears to be gone now, just for s's and g's I ran with that diagnostic tool on there. PN LFR7AIX on the plugs. BUT, we were thinking there might be a vacuum leak and I found that the TB hose wasn't seated, so I fixed that and now it seems to be doing better. Will try to run the diag tool again. Link to comment Share on other sites More sharing options...
cryo Posted September 9, 2014 Author Share Posted September 9, 2014 Glad you found the issues, Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
cryo Posted September 24, 2014 Author Share Posted September 24, 2014 I am trying to put something cool together and was hoping any customer tuned by Cryotune Performance could help out. I would like to get the nicest picture you have of your car sent to Cryotuneperformance@yahoo.com. I Know some of you have sent pic's already so that's not needed unless you have an updated picture that looks more professional or a better back drop. These could include pictures on the road/dyno/mountains/park/ etc. Thanks and hope to get quite a few together Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
covertrussian Posted September 27, 2014 Share Posted September 27, 2014 I'm trying to find a trend with timing retarding. Some runs I'll do will run full timing, then next run will be 5-10* less. It seems like some days it's more knock prone then others, even at similar temperatures. Definitely one of the most painful cars to get consistent Virtual Dyno numbers on 05 LGT 16G 14psi 290whp/30mpg (SOLD) 12 OBP Stock 130whp/27mpg@87 Oct 00 G20t GT28r 10psi 250whp/36mpg 22 Ascent STOCK Link to comment Share on other sites More sharing options...
covertrussian Posted October 5, 2014 Share Posted October 5, 2014 Found the issue, two actually, both have to do with Feedback Knock Correction, one was my heatshield hitting the WG line (needed to be trimmed), this caused ECU to think there was knock. Another one is actually related to the road I drive on, it's a rough road to my house & to the road I use for virtual dyno pulls, well because of that knocksum increments and FBKC starts pulling timing back, then by the time I do a dyno run, FBKC hasn't counted down to 0 yet. Going forward added it as a gauge and only doing WOT runs after it's at 0. 05 LGT 16G 14psi 290whp/30mpg (SOLD) 12 OBP Stock 130whp/27mpg@87 Oct 00 G20t GT28r 10psi 250whp/36mpg 22 Ascent STOCK Link to comment Share on other sites More sharing options...
cryo Posted January 18, 2015 Author Share Posted January 18, 2015 Bump for ease of reading for the new people. Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
cryo Posted June 19, 2015 Author Share Posted June 19, 2015 bump up to the top for those needing this easily accessible. Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
cryo Posted October 13, 2015 Author Share Posted October 13, 2015 Bump to the top for new owners! Thanks Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
cryo Posted December 8, 2015 Author Share Posted December 8, 2015 Glad to still be hearing from customers about these threads and hope more find it helpful. Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
Mnabeih Posted December 3, 2017 Share Posted December 3, 2017 hi all, i have a jdm lgt 2.0L 5eat i tuned it to 17.5 psi peak boost tappers to 14 psi, total timing 24 at revlimiter, e10 gasoline and with WM injection 50-50 mix, the issue is that the performance almost the same bet low timing map with 20 total timing and 24 degrees the 80-180 kph time is exactly the same. am i reached the MBT or its a TCU tuning issue?! Link to comment Share on other sites More sharing options...
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