May 20, 2019, 09:34:05 AM
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Author Topic: Articles on Engine Knock  (Read 6543 times)

Offline SHOdded

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Re: Articles on Engine Knock
« Reply #30 on: April 21, 2019, 09:17:09 PM »
Ethanol blended fuels can decrease LSPI-knock ... but only if HIGH blends are used.  In this study, E20 and E30 actually increased the incidence and severity of LSPI-subsequent knock events.  E50 still has the propensity for more LSPI, with decreased propensity for resulting knock events.

https://www.thefreelibrary.com/Influence+of+Ethanol+Blends+on+Low+Speed+Pre-Ignition+in...-a0528616644
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline SHOdded

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Re: Articles on Engine Knock
« Reply #31 on: May 10, 2019, 01:53:31 PM »
Brief video of what LSPI sounds like in an Opel engine - be sure to read the accompanying blurb
https://www.youtube.com/watch?v=RkMti5nh2S8
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline SHOdded

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Re: Articles on Engine Knock
« Reply #32 on: May 10, 2019, 01:54:13 PM »
Why You Should Never Lug Your Engine (Especially Turbos)
https://www.youtube.com/watch?v=soJea7xEt-8
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

Offline SM105K

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Re: Articles on Engine Knock
« Reply #33 on: May 10, 2019, 02:25:14 PM »
Brief video of what LSPI sounds like in an Opel engine - be sure to read the accompanying blurb
https://www.youtube.com/watch?v=RkMti5nh2S8

wow......
2013 SHO PP: AJPTurbo E30 Tune, GH Intercooler, UPR Catch Can, H&R Springs, Power Stop Brakes. Tune Only: 12.56@108.98, 391HP and 470TQ

2013 Focus ST: Ford Racing Tuned

Offline 802SHO

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Re: Articles on Engine Knock
« Reply #34 on: May 10, 2019, 04:37:41 PM »
Good tech info right there!  Catch Can and run a little rich...thats not asking too much.....not flooring it definitely won't work
2010 SHO non PP, Alky Control Methonal Injection, SP534 .028, 160 T, Airaid Intake, 3bar, Thunderstorm Catless Downpipes, custom stainless 2.5" catback w/muffler deletes 4" quad tips, UPR Dual Valve Catch Can, 13+ PP Trans Cooler, Econoaid throttle Body Booster, Mickey Thompson 20x9 SC-5 Wheels, Continental Extreme Contact DW tires F: 245/40/20 R: 275/35/20, H&R Springs all around w/rear cut 1/2", Aeroforce Interceptor Gauge, Tuned by AJP Turbo

11.833 @ 116.82 New England Dragway 10/14/18 AJP Turbo No DA Correction

Offline SHOdded

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Re: Articles on Engine Knock
« Reply #35 on: May 10, 2019, 05:21:56 PM »
It was interesting the graph of RPM vs Pressure and LSPI.  Basically you want the gear to shift lower the instant you floor it.  But using an SN PLUS oil should go a long way towards avoiding the LSPI.  Prevent a situation by avoiding things that contribute to it.
2007 Ford Edge SEL, Powerstop F/R Brake Kit, TXT LED 6000K Lo & Hi Beams, W16W LED Reverse Bulbs, 3BSpec 2.5w Map Lights, 5W Cree rear dome lights, 5W Cree cargo light, DTBL LED Taillights

If tuned:  Take note of the strategy code as you return to stock (including 3 bar MAP to 2 bar MAP) -> take car in & get it serviced -> check strategy code when you get car back -> have tuner update your tune if the strategy code has changed -> reload tune -> ENJOY!

 

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