SHOdded said: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
SM105K said:SHOdded said: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.
18SHO said:SM105K said:SHOdded said: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
SHOdded said: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.
RMB has done some and I just beat the crap out of it almost daily.SHOdded said: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?
The XDI-HPFP-35 was the first High Flow High Pressure Direct Injection pump to replace Bosch, Denso, Magneti Marelli and Delphi pumps. It is capable of up to 180bar / 2600psi injection pressure and up to 200 LPH flow. It flows up to 35% more when mounted on the same cam lobe.
The XDI-HPFP-60 is the bigger brother of the XDI-HPFP-35. Since it was designed based on the same flexibility criteria as the XDI-HPFP-35, it can be mounted on almost all the same engines. It is capable of up to 250bar / 3300psi injection pressure and up to 240 LPH flow. It flows up to 60% more when mounted on the same cam lobe.
Stock Fuel Pump Capacity = 1.12cc/str – 150bar for SHO, 200bar for Mustang and RS
XDI-HPFP-35 = 1.52cc/str – 200bar =35% more volume!
XDI-HPFP-60 = 1.83cc/str – 250bar = 60% more volume!