05-08-2018, 10:18 AM | #23 | |
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There will likely be other mated parts needed even if brad indicated the tunnels will allow it.. as far as an upgraded 8HP45.. that is not out of the question upgraded clutch packs upgraded trans shaft is likely going to be also needed to go to 700Nm I think a transmission-mod shop which knows what their doing would be required when overloading the 8HP45 I would also think additional cooling would be an issue which needs to be addressed |
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08-13-2018, 08:52 PM | #25 |
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08-14-2018, 07:18 AM | #26 |
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Ok but if you bought your n55 335i for 20k and a m3/m4 is out of your price range what do you do? It's easy to say upgrade but who actually has the money to do so? I want to upgrade mine simply because I drag it and I want to make sure I don't overload the transmission with all the torque I'm going to be putting down
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08-14-2018, 08:06 AM | #27 | |
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better to go the route which has been traveled even if by few upgraded 45 unit with clutchpacks & shafts as indicated above otherwise you could just risk it and do nothing like many do and it could work out or not I mean when you increase the stresses on the auto at some point one or two strengthened chain links isnt gong to do much because the entire chain could break at any weakened link |
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08-14-2018, 12:22 PM | #28 | ||
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08-14-2018, 04:18 PM | #29 |
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Yeah same here i just dont think there is a solution available for the public at the moment
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08-14-2018, 04:25 PM | #30 | |
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08-14-2018, 06:27 PM | #31 | |
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no I've not seen off the shelf solutions |
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08-14-2018, 06:28 PM | #32 | ||
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01-27-2021, 09:04 AM | #33 | |
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01-27-2021, 09:18 AM | #34 |
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Old thread but from I've discovered there are different variants of the zf units in terms of where the starter is mounted, on the n57 diesel zf8hp70 the starter is below the flywheel where as on the v8 zf8hp70 the starter is on the side of the flywheel. none of these will fit the n55 due to different different bolt pattern and starter location unless someone wants to make a custom bracket or do extensive fabwork to make this work. if someone does decide to go this route I'd go for the zf8hp70 on the diesel variant because it would probably bolt up easier. Tho these is a zf8hp70 version thats uses on the n55 by alpina that they use on their b3 f30 which is a direct bolt on because the starter location and bolt pattern is the same the only issue is i wasn't able to find a part number for that anywhere and it not available on realoem.com . don't think it would be possible to get that version in North America because we don't get alpina b3 here. what irks me the most is its been 10 years since the zf8hp45 is out and no one has made upgrades like torque converter, clutches ect for it tho Sonax makes a zip kit but i doubt that help with increased power rating, it probably just improves the shifts.
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01-27-2021, 11:55 AM | #35 | |
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01-28-2021, 09:46 AM | #36 | |
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02-01-2021, 03:58 PM | #37 |
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Came across this. Talks about how they used 8HP45 in the M235i during racing series in Germany. Not exactly what you were looking for but, pretty interesting none-the-less...of course money is no worries to them for a replacement.
https://www.sachsperformance.com/en/...-8hp45-from-zf
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02-02-2021, 07:39 PM | #38 |
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https://f30.bimmerpost.com/forums/sh....php?t=1736885
Some additional discussion has already taken place. |
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12-08-2021, 02:13 PM | #39 | |
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Your statements did not age well. |
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12-08-2021, 03:02 PM | #40 |
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For those who don't venture into the other parts of the forum, a similar swap to what the OP was asking about was performed over HERE. Yes, Pure Drivetrain Solutions offers an upgrade. The Pure Stage 0 ($3250) ZF 8HP45/50 is basically equal to a stock ZF 8HP70 (swap cost about $2500-3000), so if one is not looking at making more than 700 "flywheel" torque they can save themselves the energy in locating all parts for a 8HP70 swap for a relatively low price.
Edit: 8HP70 swap link --> https://f30.bimmerpost.com/forums/sh....php?t=1785998 Fixed link Last edited by 5w20; 12-08-2021 at 07:12 PM.. |
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12-08-2021, 07:00 PM | #41 | |
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Likely able to handle more but a reliability rating or 750/750, like how we can push the stock trans for quite awhile on pretty good power levels |
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12-08-2021, 07:12 PM | #42 | |
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From the website, it doesn't seem like the upgraded transmissions change the cooling lines and the heat exchanger properties that are forward in the engine bay. And we all know heat kills transmissions. If you're drag racing for no more than 30 seconds at a time, then it may not be a problem. It certainly will be a problem if you're pushing the car very hard for 30-60 minutes continuously. |
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12-09-2021, 11:21 AM | #44 |
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I emailed pure drivetrain. They are located in Medford NY, on Long Island. I may swing by there this weekend
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