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2015+ S550 Mustangs
2.3L EcoBoost I-4 Engine Modification/Discussion
Complete bolt on Ecoboost
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<blockquote data-quote="Voltwings" data-source="post: 14619028" data-attributes="member: 155561"><p>I preach meth kits for this exact reason, DI = no fuel passing over the valves and those things get dirty as hell. I'm also taking for granted that my DI experience comes from a platform where Cobb provides free tuning software, and virtually everyone is capable of Doing MAF cals themselves, as far as fuel blends is concerned. In that sense, i agree, from a remote tuners standpoint blending fuels could be quite the headache. Just for fun i went ahead and dug that math out though, if anyone is interested. </p><p></p><p></p><p>This post took place on facebook, so i'm just copying the relevant posts, so the context may not make sense. The math is the important part though. Basically, this car had previously been tuned on 93 and methanol, and upon switching to an E85 blend, we noticed we werent really making as much power as we previously were. I have datalogs to go with this as well, but i'll have to grab them off my home computer. We did a compression test, checked plugs, checked tune, and just on a whim after chatting with another car guy at work (who is an engineer) we started breaking down the fuel:</p><p></p><p>So heres some really interesting math we did Breaking down the different fueling choices we've had on ------- car when comparing Boost air temp, horsepower, boost, timing...</p><p></p><p>Methanol: 56,800 BTU/Gal</p><p>E85: 81,800 BTU/Gal</p><p>Gasoline: 114,600 BTU/Gal</p><p></p><p>So, using our 25% E85 blend, we basically get an effective BTU of 106,400 / gal.</p><p>(81,800 *4/16) + (114,600*12/16) = 106,400 BTU for a 25% E85 or about 30% ethanol per tank.</p><p></p><p>Next, if we inject methanol into that same 25% E85 blend.</p><p>3400 cc/min total @ 85% IDC gives us ~2890 cc/min from the stock fuel system, or 45.80 GPH.</p><p>The Meth gave us ~10.05 GPH, assuming we used ~75% of a 14 gph nozzle.</p><p>82% of our fueling was stock injectors, and 18% was methanol.</p><p></p><p>Heres where it gets really fun. We were still spraying a 25% E85 blend through the stock injectors at that point, so we had an effective BTU of 106,400 as listed above.</p><p>106,400 * .82 = 87,248</p><p>56,800 * .18 = 10,224</p><p>Effective BTU when we had the E85 and meth was 97,472</p><p></p><p>... i was hoping to prove the meth + E85 blend had more effective BTU, but it seems it was just the opposite since the E85 gets diluted with the methanol... Interesting.</p><p></p><p>Heres a real doozie ... Straight 93 with meth gives you 104,196 BTU/gal <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite12" alt="o_O" title="Er... what? o_O" loading="lazy" data-shortname="o_O" /></p><p></p><p>114,600 * .82 = 93,972</p><p>56,800 * .18 = 10,224</p><p>Total = 104,196</p><p></p><p>Obviously this isnt taking things into account like knock suppression or things like that, but basically you have a "higher power potential" with 93 and meth than you do with all 3? Strange indeed ...</p><p></p><p>Actually had this math confirmed by a few tuners. Interesting indeed</p></blockquote><p></p>
[QUOTE="Voltwings, post: 14619028, member: 155561"] I preach meth kits for this exact reason, DI = no fuel passing over the valves and those things get dirty as hell. I'm also taking for granted that my DI experience comes from a platform where Cobb provides free tuning software, and virtually everyone is capable of Doing MAF cals themselves, as far as fuel blends is concerned. In that sense, i agree, from a remote tuners standpoint blending fuels could be quite the headache. Just for fun i went ahead and dug that math out though, if anyone is interested. This post took place on facebook, so i'm just copying the relevant posts, so the context may not make sense. The math is the important part though. Basically, this car had previously been tuned on 93 and methanol, and upon switching to an E85 blend, we noticed we werent really making as much power as we previously were. I have datalogs to go with this as well, but i'll have to grab them off my home computer. We did a compression test, checked plugs, checked tune, and just on a whim after chatting with another car guy at work (who is an engineer) we started breaking down the fuel: So heres some really interesting math we did Breaking down the different fueling choices we've had on ------- car when comparing Boost air temp, horsepower, boost, timing... Methanol: 56,800 BTU/Gal E85: 81,800 BTU/Gal Gasoline: 114,600 BTU/Gal So, using our 25% E85 blend, we basically get an effective BTU of 106,400 / gal. (81,800 *4/16) + (114,600*12/16) = 106,400 BTU for a 25% E85 or about 30% ethanol per tank. Next, if we inject methanol into that same 25% E85 blend. 3400 cc/min total @ 85% IDC gives us ~2890 cc/min from the stock fuel system, or 45.80 GPH. The Meth gave us ~10.05 GPH, assuming we used ~75% of a 14 gph nozzle. 82% of our fueling was stock injectors, and 18% was methanol. Heres where it gets really fun. We were still spraying a 25% E85 blend through the stock injectors at that point, so we had an effective BTU of 106,400 as listed above. 106,400 * .82 = 87,248 56,800 * .18 = 10,224 Effective BTU when we had the E85 and meth was 97,472 ... i was hoping to prove the meth + E85 blend had more effective BTU, but it seems it was just the opposite since the E85 gets diluted with the methanol... Interesting. Heres a real doozie ... Straight 93 with meth gives you 104,196 BTU/gal o_O 114,600 * .82 = 93,972 56,800 * .18 = 10,224 Total = 104,196 Obviously this isnt taking things into account like knock suppression or things like that, but basically you have a "higher power potential" with 93 and meth than you do with all 3? Strange indeed ... Actually had this math confirmed by a few tuners. Interesting indeed [/QUOTE]
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Complete bolt on Ecoboost
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