May 20, 2019, 10:19:07 AM
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Author Topic: Articles on Fuel Systems  (Read 6634 times)

Offline SHOdded

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Re: Articles on Fuel Systems
« Reply #15 on: November 06, 2017, 02:54:14 AM »
Want to find out how your fuel injectors are doing?  xIt is quite simple if you access to an advanced scantool like SnapOn Ethos/Modis etc, and this is what it does:
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Relative compression test:
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There should be no DTCs present at the test, and the battery should be in good shape.  Perhaps an annual check would be advisable.
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 Fuel Systems
« Reply #16 on: December 22, 2017, 03:21:23 PM »
PEA! PEA! PEA!  Or ... NO PEA???  Ask the Princess.

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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 Fuel Systems
« Reply #17 on: March 20, 2019, 10:22:55 PM »
https://www.underhoodservice.com/oil-direct-fuel-injection/

"High-Pressure Fuel Pump and Oil
The main destroyer of high-pressure fuel pumps is delayed oil changes. Wear between the camshaft lobes and the high-pressure pump follower prevents the pump from generating enough piston movement. Less movement of the pump means less pressure. The ECM uses the camshaft and crankshaft position sensor inputs to synchronize the high-pressure fuel pump actuator with the position of each of the camshaft lobes. The ECM regulates fuel pressure by adjusting the stroke of the pump.

You should examine the lobes on the camshaft before installing a new, expensive high-pressure fuel pump. A lack-of-power complaint may improve from this measure, but will never be completely corrected."
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 Fuel Systems
« Reply #18 on: April 18, 2019, 10:51:53 PM »
Fuel property effects on low-speed pre-ignition

https://www.sciencedirect.com/science/article/pii/S0016236118308858

Quote
Abstract
This work explores the dependence of fuel distillation and flame speed on low-speed pre-ignition (LSPI). Findings are based on cylinder pressure analysis, as well as the number count, clustering, intensity, duration, and onset crank angle of LSPI events. Four fuels were used, with three of the fuels being blends with gasoline, and the fourth being neat gasoline. The blended fuels consisted of single molecules of different molecular types: a ketone (cyclopentanone), an alcohol (2-methyl-1-butanol), and an aromatic (ethylbenzene). All three pure molecules have RON values within ±2 and boiling points within ±5 °C. These fuels were blended with gasoline to a 25% mass fraction and were used to run the engine at identical LSPI prone operating conditions. The findings highlight that fuels with similar boiling properties and octane numbers can exhibit similar LSPI number counts, but with vastly different LSPI magnitudes and intensities. Moreover, the results highlight fundamental fuel properties such as flame speed are critical to characterizing the LSPI propensity and behavior of the fuel.
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 Fuel Systems
« Reply #19 on: April 21, 2019, 12:04:41 AM »
Why it is important to shift to SN+ certified/compatible oils - not only for drag strip conditions, but at long stoplights or onramps or city driving.  Many will face this situation on a daily basis as traffic continues to deteriorate.

Quote
The raw fuel doesn’t have sufficient time to fully vaporize, due to a lack of turbulence and an abbreviated dwell time. This fuel can puddle between the upper piston ring and ring land. When mixed with the oil, it can produce this low octane compound. When the throttle pedal is punched after extended idling, this compound can pre-ignite, causing severe damage to the piston rings and lands.

Another factor contributing to LSPI is a fuel’s distillation curve, which displays how easily a fuel evaporates. Interestingly, whereas a racing or premium fuel is typically desired for performance driving, a standard fuel will vaporize more easily. While it is still necessary to have a high-enough octane to support an engine’s compression and performance needs, some racing fuels with a high distillation temperature can be detrimental in direct-injected engines. This is due to the higher octane racing fuel’s resistance to vaporization and the resulting LSPI occurring in direct-injected engines.

https://www.lsxmag.com/tech-stories/engine/the-highly-specific-life-of-ls-and-lt-based-motor-oils/

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 Fuel Systems
« Reply #20 on: April 21, 2019, 08:50:12 PM »
Octane - RON more relevant than MON.  Also, intake air temperature, pressure, and engine speed seem to affect knock readings more than octane.

https://www.thefreelibrary.com/Understanding+the+octane+appetite+of+modern+vehicles.-a0478823007
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 Fuel Systems
« Reply #21 on: April 21, 2019, 09:17:31 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 SM105K

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Re: Articles on Fuel Systems
« Reply #22 on: April 22, 2019, 06:50:15 AM »
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

Geez...what a clusterfu#k. Since meth is a akly fuel it also contributes to this.....great.  Looks like I will be looking more into actual race fuels.   
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 18SHO

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Re: Articles on Fuel Systems
« Reply #23 on: April 22, 2019, 07:09:07 AM »
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

Geez...what a clusterfu#k. Since meth is a akly fuel it also contributes to this.....great.  Looks like I will be looking more into actual race fuels.   


Race gas additive is the best bet , I may be working on that next . 2 full cans in a full tank of gas gets a true 100 octane

Offline SM105K

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Re: Articles on Fuel Systems
« Reply #24 on: April 22, 2019, 07:29:09 AM »
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

Geez...what a clusterfu#k. Since meth is a akly fuel it also contributes to this.....great.  Looks like I will be looking more into actual race fuels.   


Race gas additive is the best bet , I may be working on that next . 2 full cans in a full tank of gas gets a true 100 octane

I was looking into Torco Accelerator.  However I have a fuel station that sells 95 and 100 octane straight out of the pump kinda near my house.  I don't drive the SHO much so I might just bite the bullet and see what happens if I run straight race fuel all of the time.   Going to email Brad later.
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 SHOdded

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Re: Articles on Fuel Systems
« Reply #25 on: April 22, 2019, 08:26:43 AM »
Moving to SN+ oil is your first goal.  Because if you don't, then the problem of LSPI-inducing oil particles remains.  The next thing is to keep the injectors clean, since it affects spray patterns and cylinder wall spatter.  It was found that rotating the injector 45 degrees would increase wall spatter, so imagine the smooth flow of fuel interrupted by deposits making the spray go willy nilly ...  Again, not to alarm, just to make aware.  I do not know how big an issue the deposits are.  Every aspect is being researched, but not much quantification by way of importance, other than oil first, fuel second.

I have not yet begun to research what fuel will help with that.  Tho I do know there is VERY little research on current fuel additives like Techron/BG in DI situations.  There is supposedly a custom additive proven to reduce/eliminate fuel injector deposits, but I cannot find it on the open market.
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 Fuel Systems
« Reply #26 on: April 22, 2019, 09:19:45 AM »
Moving to SN+ oil is your first goal.  Because if you don't, then the problem of LSPI-inducing oil particles remains.  The next thing is to keep the injectors clean, since it affects spray patterns and cylinder wall spatter.  It was found that rotating the injector 45 degrees would increase wall spatter, so imagine the smooth flow of fuel interrupted by deposits making the spray go willy nilly ...  Again, not to alarm, just to make aware.  I do not know how big an issue the deposits are.  Every aspect is being researched, but not much quantification by way of importance, other than oil first, fuel second.

I have not yet begun to research what fuel will help with that.  Tho I do know there is VERY little research on current fuel additives like Techron/BG in DI situations.  There is supposedly a custom additive proven to reduce/eliminate fuel injector deposits, but I cannot find it on the open market.

I agree with the oil.  Going with what you said, I am going to jump over to the Castrol Magnatec 5w-30 after looking into it on Bob's list.  Again just going to change it often.  I am averaging less then 100 miles a week on the SHO right now.  With the 95 unleaded I will be hopefully relieve the stress of the fuel system, and hopefully gain some more POWA!  We will shall see.  I like screwing around with this car.
« Last Edit: April 22, 2019, 09:37:11 AM by SM105K »
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 SHOdded

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Re: Articles on Fuel Systems
« Reply #27 on: April 22, 2019, 11:34:22 AM »
The oil should relieve most of the LSPI fears, I think.  People don't just move to a new spec without due cause.  As of yet, the %age allotted to fuel itself for LSPI occurrences is yet undetermined.  BUT, higher ethanol blends do seem to have a higher risk to reward ratio in this regard, bolstering those who want to go full E85 ...
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 mattr66

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Re: Articles on Fuel Systems
« Reply #28 on: April 23, 2019, 08:07:48 AM »
Lubrication Engineers 8854 5w-40 is the best oil for gen 1 ecoboost period..... $140 for 5 gallons usually.  I beat the crap out of my car and it runs noticably more quiet with it.

Sent from my Moto Z (2) using Tapatalk


Offline SHOdded

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Re: Articles on Fuel Systems
« Reply #29 on: April 23, 2019, 08:40:04 AM »
Do you have oil analysis data to share, Matt?  I know one of our members (panther) was running it in his SHO way back when.  And also, how did you come to select 5W40, what MY is your SHO?
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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