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BMW 3-Series (E90 E92) Forum
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Something cool (n54 vs 3sm Page 5)
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11-02-2015, 08:54 AM | #23 |
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11-02-2015, 09:56 AM | #25 |
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Drives: 08 E90 335xi TiAg
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I've got an extra n54 intake manifold in the garage in excellent condition. Anyone interested in buying it??
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11-02-2015, 02:40 PM | #26 |
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11-20-2015, 08:00 AM | #27 | |
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11-20-2015, 12:08 PM | #30 | |
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11-20-2015, 12:09 PM | #31 |
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Their FB page
https://www.facebook.com/Bimmer-Perf...4409408587343/ Build (project Alice): https://www.facebook.com/media/set/?...8587343&type=3 |
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11-20-2015, 12:42 PM | #32 |
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Wait so, we could use their tune and take the tb out..and get gains? I know it's not that easy but that's what it sounds like..
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11-20-2015, 03:07 PM | #33 | |
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In the latest FB post, they said it was up to 231wtq, which is better than stock, but that's almost certainly at a higher RPM. This would be just fine though in a lighter car with shorter gearing. It didn't look like the facebook post had much more information, but this validates exactly what I had planned on doing with an N52 for my other car: -No throttle (it's not really needed), no MAF (also not needed) -Short runner intake manifold with large volume airbox (N54 probably works, but I think custom could be better) -higher redline (at least 7500rpm) If it can do 8,000rpm on stock internals, I want to take it a step further and mechanically retard the intake cam by 5-10 degrees. I bought a cam timing tool that I intend to modify for this purpose, but I need to pick up a motor (not doing this to my 330i DD) and I'll have to check piston/valve contact to be sure it won't destroy anything. Just retarding the cams could gain power with no bottom end sacrifice, fuel economy and emissions would suffer but it wouldn't be a DD. So, assuming 260+whp isn't BS, it seems over 300 at the crank is feasible on basically stock internals. That's basically a stock N54, although the torque curve will certainly be shifted higher, that's fine. I like N/A responsiveness, and the N52's light weight is appealing. I suppose since this isn't FI, the ceiling for the injectors is a little higher since the N52 seems to like to run north of 13:1 while N/A. |
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11-20-2015, 03:11 PM | #34 |
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Keep in mind this is on MSV70. I'm not sure how much it translates into MSV80, which although similar, is a different architecture. it's not clear to me if it would work the same on a 328i. Maybe..
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11-20-2015, 07:32 PM | #37 |
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I wonder what just their tune and the n54 mani can do
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11-20-2015, 08:07 PM | #38 |
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8k sounds sketchy. Pretty sure BMW kept the redline at 7k because they were eating up camshafts
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2007 TiAg 328xi: AA Tune, AFE intake, Full exhaust, 335xi Brakes, H&R RSB, UUC FSB, H&R Sports, Billy Sports...BBS SR 17x8
1985 Gazelle Beige 325e: Poly everything, e24 3.25 LSD, 225 lb weight reduction, Corbeau FX1, Shifter machined by me, roll bar, harness, all the other goodies. My "Racecar"...15x7 BBS RA |
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11-20-2015, 08:14 PM | #39 |
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Where did you read that? Theres no version of a stock n52 that bmw tuned to rev to 8k.
I would consider switching to solid lifters & shims but theres no reason it should eat camshafts. |
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11-20-2015, 08:18 PM | #40 | |
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11-20-2015, 08:36 PM | #41 |
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They definitely tested the engine pre-production engines at different RPMs. The valve springs are really stiff from valvetronic and spinning the camshaft faster put bigger loads on it where it contacts the lifters. Probably wont result in yielding or fracture immediately, but with that much cyclical loading, i wouldnt trust it over time
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2007 TiAg 328xi: AA Tune, AFE intake, Full exhaust, 335xi Brakes, H&R RSB, UUC FSB, H&R Sports, Billy Sports...BBS SR 17x8
1985 Gazelle Beige 325e: Poly everything, e24 3.25 LSD, 225 lb weight reduction, Corbeau FX1, Shifter machined by me, roll bar, harness, all the other goodies. My "Racecar"...15x7 BBS RA |
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11-20-2015, 08:42 PM | #42 |
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2007 TiAg 328xi: AA Tune, AFE intake, Full exhaust, 335xi Brakes, H&R RSB, UUC FSB, H&R Sports, Billy Sports...BBS SR 17x8
1985 Gazelle Beige 325e: Poly everything, e24 3.25 LSD, 225 lb weight reduction, Corbeau FX1, Shifter machined by me, roll bar, harness, all the other goodies. My "Racecar"...15x7 BBS RA |
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11-20-2015, 09:24 PM | #43 |
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It doesnt say anything about testing it at 8k. It just says it becomes less efficient at high rpm.
Mike, i was talking about what SDemetris said. I saw that BPC it tuning it to that, but the dyno posted so far ends at the stock redline. |
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11-20-2015, 10:36 PM | #44 |
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video of their set up in action
this is freaking impressive https://video-iad3-1.xx.fbcdn.net/hv...7a&oe=565008DA |
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