07-20-2022, 09:46 AM | #45 | |
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JMcLellan2532.50 |
07-20-2022, 12:21 PM | #46 | |
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The new TU pump wasn't on the mods list until I started having rail pressure drops when using using an ethanol blend. Then seeing you can get a new one for $375 shipped it was a no brainer. I'm sure by next spring you could probably get them for cheaper than that, or snag a used one from someone on B58 enthusiasts FB group selling one.
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07-20-2022, 01:48 PM | #47 | |
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07-20-2022, 02:22 PM | #48 | |
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I bought from Merlin Diesel who is a company in Europe to get that $375 price. The typical beemer parts places domestically (ECS, Extreme Power House) are more like $450 to $500.
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07-20-2022, 05:35 PM | #49 | |
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07-21-2022, 05:43 PM | #50 | |
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07-22-2022, 01:18 PM | #51 | |
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The TU HPFP is just to remove the bottleneck in fueling since I had already replaced everything prior to that, and it still misfired. Logs seem fine now. As I recall, the pre-LCI M240i, F30 340, F32/33 440i, etc. all have the original/1st-gen HPFP which has a lower flow rate ceiling. The LCI M240i, M340i, M440i, X3M40i, etc. are all the 2nd-gen B58s and have the TU HPFP on top of a higher baseline HP. |
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07-26-2022, 08:04 AM | #52 | |
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It could be just the 91 map is too demanding..? for the octane you get, i've been using MHD maps 94 only for the last 6 months, Stage 2 and stage 2+ never really had misfire issues, that was as well with a stock HPFP and a dorch stage 2, 2017 m240i, Try how the 95 map feels with 100, might solve the issue
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09-21-2022, 04:46 PM | #53 | |
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At almost 70k miles now; ever since I had the TU HPFP on, no more misfiring with any octane, any map. No codes either. |
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09-30-2022, 08:27 AM | #54 | |
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I believe we don't get the TU hpfp untill at least the 2021 versions. |
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10-04-2022, 12:10 PM | #55 | |
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All F22 B58s LCI or not have the 1st gen HPFP. The G42 B58 is the 2nd gen with higher output and TU HPFP. |
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