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TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old January 29th, 2018, 19:10   #496
turbobrick240
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I'd try dialing back the methanol content of the mix. Maybe try just water, and then a 25/75% methanol to water ratio. With too much methanol, the timing of the combustion event could be thrown off slightly. As 486 mentioned, it's also another fuel source competing(with diesel vapors) for oxygen to combust.
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Old January 29th, 2018, 19:18   #497
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Actually i just thought of it, i think your right 486, if you have too much fuel robbing all the o2 than you would have lots of smoke, methanol is much more reactive than diesel fuel vapor and if your not putting enough boost into the engine than you would have this problem possibly. OP, up your boost a bit and see what happens.
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Old January 29th, 2018, 19:49   #498
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Now that I'm thinking about it, Methanol has quite a lot of oxygen in the alcohol itself. I think there could be some chemical delay of ignition with high injection rates of methyl. It has 5 times the latent heat of vaporization as compared to diesel fuel (could be quenching combustion somewhat), and nearly four times the autoignition temp - 870F vs. ~230F . If you play around with the blend ratio of water to meth., you should be able to find a happy medium.
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Old January 29th, 2018, 22:41   #499
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lack of complete combustion from low compression makes white smoke, same with cold combustion chambers
their complaint is black smoke, which is overfueling
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