"Goggles Pizzano" (gogglespizzano) 04/24/2020 at 02:27 • Filed to: None

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Jim Spanfeller > Goggles Pizzano 04/24/2020 at 02:43

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Truck yeah, mothertrucker!

I can’t help but wonder if they’d be faster minus the coal-rolling, though...

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > Goggles Pizzano 04/24/2020 at 08:27

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So many forced inductions... 

BigBlock440 > Jim Spanfeller 04/24/2020 at 08:30

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If they were able to cram even more air in it to burn all the extra fuel, yes. If you reduce the fuel to only burn with the available air, no. But if you cram more air in to get more complete combustion, that also allows more fuel (thus, more power) to be pumped in as well. Compression ignition engines aren’t spark ignition engines, and they’re burning oil, not alcohol.

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > Jim Spanfeller 04/24/2020 at 08:33

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Ther’ es a difference b etween rolling coal for show and diesel power tuning smoke. When you’re running 70 -10 0psi (or more) of boost, you need that extra fuel to keep exhaust temperatures under control and generate the torque that full load conditions will require. You can make a diesel smoke without tuning it for power, but a full on diesel max- power tune is going to smoke, unless you’ re burning alcohol. 

CarsofFortLangley - Oppo Forever > Goggles Pizzano 04/24/2020 at 08:55

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Jim Spanfeller > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t 04/24/2020 at 09:44

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Ahh. So not only is coal rolling bad for your engine, but it’s extra tacky because it’s mimicking something it’s not...

Jim Spanfeller > BigBlock440 04/24/2020 at 09:45

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Ahh, thanks. I didn’t know diesel engines could do that when actually modified prop erly.

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > Jim Spanfeller 04/24/2020 at 09:58

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It’s a tricky balance. If you know exactly how much air you are going to get, and how much load you have (power you’ll need) you *CAN* tune a diesel to make huge power and NOT smoke (at the risk of extremely high exhaust gas temps that can melt valves and turbos). The problem comes in with something like pulling, in pulling your power demands are never fully concrete, there’s traction, load shift, momentum, yada yada yada... If you want to make sure you have all the power you can possibly get in any circumstance, you run rich as a baseline. This leaves some fuel overhead that can be burned if there’s air/demand, but if the fuel isn’t there to begin with, then it doesn’t matter if you have enough air or greater demand, there’s nothing to burn. Also, as mentioned, running rich helps keep exhaust temps lower which is better for your megabucks humungus turbo(s) and exhaust valves. You clean off soot, but if your turbine melts you’re S.O.L. You can sometimes see pulling trucks/tractors go clean(ish) exhaust under the highest load part of the pull as the fuel/air/demand equalizes at the maximum engine output potential.

Darkbrador > Goggles Pizzano 04/24/2020 at 10:06

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Wh en you need that plywood really fast ... 

Jim Spanfeller > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t 04/24/2020 at 10:40

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