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BMW 3-Series (E90 E92) Forum
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New Motor different HPFP
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08-21-2022, 11:53 AM | #1 |
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New Motor different HPFP
Hey guys, I had the opportunity to buy a G1000 from Ghassan Automotives for a really good price and I plan on dropping that motor in my 335, only issue is that I have a late N55e with a f30 style pump, now I had previously upgraded with a stage 2 hpfp from Dorch engineering currently on it, and the vacuum pump mounting style is different from the early n55s and I’m having a tough time seeing if I can remove the early n55 pump and bolt up my newer style one, unfortunately all I am seeing is people talking about using the older style for the newer n55e because they’re a better flow rate, what are the chances that the flow rate is better than a stage 2 pump from Dorch? If it isn’t better than I would like to see if I can fit it with the newer style to accommodate the stage 2 pump, I hope I’m making sense
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08-21-2022, 12:58 PM | #2 |
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The old stock style defintaley beats the new stock style, but I'd take a new style dorch stage 2 over the old stock style. I think the only way the old stock style would beat a dorch stage 2 if if you put a PFS POD overdrive on it.
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08-21-2022, 02:16 PM | #4 |
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Do you know if it can physically fit my new vacuum pump to allow me to continue using my stg2 hpfp? I did read there’s some DME programming and voltage difference between the 2 pumps my car is currently intended for the new style but I need to figure out if I can just unbolt the vacuum pump and pop on my newer style
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08-22-2022, 07:13 PM | #5 | |
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08-22-2022, 07:17 PM | #6 | |
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08-22-2022, 08:32 PM | #7 |
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Do I understand it correctly that you had an n55 with f chassis style hpfp but now you got an early n55 with the same hpfp as an n54? From what I saw on some other forum, early n55 with the n54 hpfp has a different vacuum pump/hpfp chain tensioner compared to the later style n55 with f chassis style hpfp. That tensioner is not sufficient for driving later style hpfp and the chain tends to stretch really quick and come off. I’ve also heard that the newer style tensioner can’t be mounted to the early style block.
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08-22-2022, 08:41 PM | #8 | |
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08-22-2022, 10:30 PM | #9 |
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Not saying it won’t bolt up, just read that somebody did this and the vacuum pump chain kept coming off due to insufficient tension and quick stretching.
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