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BMW 3-Series (E90 E92) Forum
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N52 engine build :)
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09-11-2017, 02:46 PM | #221 | |
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Also regarding the intake ports, according to my notes: Intake ports on the S54 are 52mm wide and 33.5mm tall. N52 ports are 50.2mm wide and 30.2mm tall. S54 TBs are supposedly port matched to the heads from the factory, so I'd expect the throttle body measurements to be pretty close to the intake port measurements. If you're making an adapter, maybe you can incorporate the taper right in the adapter. Last edited by Terraphantm; 09-11-2017 at 03:53 PM.. |
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09-11-2017, 07:32 PM | #222 |
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I'll have a N52 head free to compare in a week. I I have a couple of S54's. I have the adapter and a set of throttle bodies. If I have time, I'll mock it up this weekend.
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09-11-2017, 10:56 PM | #223 |
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nice! My head tracking# said it would arrive today but I don't yet have throttles to test. I think the only real issue will be one bolt for the OFH, but that should be relatively simple to work around.
yeah, terra - duh. I should have asked you first I guess. Already paid for it unfortunately. The auction made it look like it was in bad shape but it looks like it's just a little bit of grime. I don't think age is much of an issue. The throttles though, I'm being more picky.. Got the last 3 bolts undone today on the head - haven't pulled it yet, don't have time to change into grimey clothes nor anywhere to put the head yet. I'm mainly curious to see what the bottom end looks like - once the head is off, pulling the rest apart will be pretty quick. I'm going to try and get this head flowbenched, maybe look and see if anything can be done to improve flow given the relatively low amount of lift we have available. |
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09-12-2017, 10:50 AM | #224 |
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Terra - didn't you modify your vacuum distribution tube on your M3 to accept a MAP sensor? It's sort of required on the N52 (especially with no MAF) - looks like Frank Smith sells one but it costs more than a real CSL rail (which is also ridiculously expensive now). Seems like it shouldn't cost too much to make a stainless flange and have it welded to the standard tube..
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09-12-2017, 03:08 PM | #225 | |
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09-12-2017, 03:11 PM | #226 |
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Drives: 2014 435 x drive msport
Join Date: Dec 2016
Location: Eastern Connecticut
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This is motivating
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09-13-2017, 09:36 AM | #227 | |
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my head shipment got delayed by the hurricanes - I'm safe and dry up here though so I can't complain too much. All the bolts are now out of my head, but it's pretty stuck on there.. I guess after 250,000 miles it doesn't want to come off, lol. I need to clean up the garage before I pull it off anyway. |
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09-13-2017, 09:36 AM | #228 |
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Hass, if you put the head on a flow bench will you please CC a combustion chamber. I am surprised, but that hasn't been done on a N52, by any of the major shops. I need to know the chamber volume to compare with a N54.
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09-13-2017, 02:49 PM | #230 |
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This is mine now. I figured I could sell the fuel rail/injectors and recoup some of the cost. Also, if you wanted to do 2-stage injection, this would be an easy way (probably not needed for an N52 though). nice thing is I think all the hoses for the CCV/oil separator will plug right into the S54 throttles & airbox. |
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09-13-2017, 03:41 PM | #231 | |
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09-13-2017, 04:44 PM | #232 |
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heh that's funny. I guess the production run was far too small to keep making one-off parts. I wonder how many CSL parts they ended up selling to non-CSL owners.. I'd bet far more than the original production.
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09-13-2017, 08:33 PM | #233 | |
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I think in this case it was more Bosch that was the issue than BMW. The new part looks more hacked together than a lot of the DIY solutions. |
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09-14-2017, 02:14 AM | #234 |
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I don't remember my CSL air rail costing $400. It's been a couple years but I seem to remember something ~$290(?).
Give a shout out to flipm3, aka, performance eurowerks. Great knowledgeable shop. Alex is a diamond. He might have some out-of-the-box solutions for you. |
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09-14-2017, 06:48 AM | #235 | |
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Another option for him might be to just use a different differential pressure sensor and tap one port into a vacuum line. |
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09-15-2017, 01:45 AM | #236 | |
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Good idea on the vacuum tho I know nothing about how that could work with what part 😃 - you guys are way beyond me. |
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09-15-2017, 09:03 AM | #237 |
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https://***************************/...luminum-flange
Wonder if they could make a custom one with a tapered port (maybe if we could get more people interested?). Also, we need the gaskets on both sides (it's on the head on the S54, and on the manifold on the N52). I figure the bolt pattern itself I can do on my own. edit: Oh fuck this site. just search on google for "BMW n54 intake manifold flange" and it's on the first page of results. The N54 version is only $84 so not bad really, maybe a custom one would be double? Last edited by hassmaschine; 09-15-2017 at 09:11 AM.. |
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09-15-2017, 10:22 AM | #238 | |
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09-15-2017, 10:52 AM | #239 |
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Some stuff to figure out first - primarily, can I make the S54 throttles clear the OFH without having to modify the flange on cyl #1 (it will be close). Hooking up the MAP sensor and making a bracket for the actuator are also necessary but not terribly difficult.
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09-19-2017, 06:41 AM | #240 |
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What is the bore of the ITB?
I picked up one of the alumn flanges. Nicely machined piece. Reasonable price. Specs- 0.063" thick, ports 1.99" x 1.14" (50.5mm x 29.0mm) Later today I will set it on the N52 head and IM and see how close it aligns up. |
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09-19-2017, 08:36 AM | #241 | ||
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sounds like there's room in the N54 flange to machine it a bit more. |
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09-19-2017, 08:58 AM | #242 |
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The aluminum flange is only 44.5mm (1.75") tall. It is machined scalloped out for the mounting bolt holes. Need to check mounting clearance and make flange not scalloped but straight across above and below the mounting holes.
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