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Just another n54 engine build thread
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12-09-2012, 10:08 AM | #23 |
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Subscribed, this will be a interesting build
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12-09-2012, 04:19 PM | #25 |
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12-09-2012, 04:38 PM | #26 |
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2011 Alpina B3S Bit ... [9.50] 2010 Alpina B3 Biturbo [10.00] 2009 Alpina B5S [10.00] |
I drive an Alpina B3 Biturbo, it has Mahle pistons and runs 16,5psi stock with a compression of 9.4:1
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12-09-2012, 05:38 PM | #27 |
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boost is only 1 part of the equation. Alpina lowered compression to provide higher power even with really really shitty gas.
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12-09-2012, 06:10 PM | #28 | |
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12-09-2012, 06:59 PM | #29 | |
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12-09-2012, 10:09 PM | #30 |
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Depends on how much power you're looking for. Shiv ran 800 whp on e85 with his custom surge tank. He backed it off a bit for Shift Sector, but was still running 100% e85. I think we haven't hit the cap on the HPFP as long as we can supply the volume it demands. The fact that he was able to hit those numbers are very impressive. I don't know how many people would be looking to run a daily driver what that kind of power, but if I was able to run 600 whp and turn 10's with my daily driver I would be very happy. Considering the vast amount of torque we already have with this platform, this car is a real animal. The n54 has shown to be truly and amazing engine.
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12-10-2012, 01:41 AM | #31 |
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12-10-2012, 08:08 AM | #32 | |
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I think the HPFP is most certainly the limitation at this point. Terry's logs show it cannot keep up with the demands, even with the Low pressure holding target perfectly. I wish we could get more information from Shiv on what they have done specifically on his car, we see the surge tank and the fuel pump, but have they tried replacing the fuel feed line with something larger from the LPFP to the inlet of the HPFP? Are they running higher than 72psi of fuel pressure on the low side? |
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12-10-2012, 09:17 AM | #33 | |
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As far as I know with Shiv's solution, he still has the stock LPFP that feeds a high pressure racing fuel pump. They have a pressure regulator between that and the surge tank, which holds about 1 liter, to keep from over pressuring the surge tank. Then another pressure regulator to keep from over pressuring the line to the HPFP. It's my understanding he is still using the stock fuel lines. For everyone who is anti Vishnu, you have to remember this is not a Vishnu solution. FFTEC fabricated this and tested this solution. That shop has produced some of the highest HP EVO's anyone has ever seen. They are not new to the world of high performance cars. Yes this is a new platform for them, but when you look at all other applications of high performance fueling solutions, the surge tank solution has been used for years on high HP fuel injected cars. We just haven't adopted the solution on our platform until now. Just watch, everyone with an opinion without any knowledge of how a surge tank works will try to punch holes through this solution. It won't be until a few people actually start using it will it become more acceptable. But honestly, how many people are going to need a surge tank so they can make 800+ whp? I personally would be happy with 600 whp and hopefully the inline booster can supply the demand. Two years ago if someone would have told you this engine would be running on 100% e85 making as much HP as upgraded turbos made at that time you would have said that wouldn't be possible due to the limitations of the fueling system. Who's to say in the next two years with big turbos and additional fueling solutions this engine won't be making 1000 whp? We won't know until we try. |
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12-10-2012, 11:08 AM | #34 |
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Is there a dyno of this run?
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12-10-2012, 11:25 AM | #35 |
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Yes, but I don't have it to publish. Other than the pictures they posted, I don't think anything else has been released regarding the development. To be honest, I was actually shocked to find out Shiv was running 100% e85 and not race gas for Shift S3ctor. It's an impressive looking setup and it seems to be working because he didn't have any issues making half mile passes and some very impressive speeds. I do know they brought a lot of e85 with them and they burned through it quickly considering Shiv didn't make a lot of passes because he was working on customer cars most of the time.
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12-10-2012, 11:42 AM | #36 |
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Hmm I wonder what kind of boost was needed for 800whp.... or what rpms.
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01-04-2013, 03:59 PM | #37 |
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Bumping this thread for some advice... looks like I am not going to build the engine as stated before but rather just go back to stock. Here's the question at hand, any issues that anyone could think of that would arise if I were to buy a n54 from a salvaged 335xi and swap it into the 535i?
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01-04-2013, 04:04 PM | #38 | |
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01-04-2013, 10:20 PM | #39 | |
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but y u no build? |
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01-04-2013, 10:38 PM | #40 |
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I read through all the post and was about to subscribe to this thread... until I read OP is just going back to stock
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01-04-2013, 11:17 PM | #41 |
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The XI has a wacky oil pan so the front axle can pass through it. So just swap oil pans too. I'm not sure of other minor differences, but you have the original engine so just swap out whatever you need. You can also double check and compare the parts diagrams at RealOEM.com
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01-05-2013, 11:04 PM | #42 | |
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01-05-2013, 11:22 PM | #43 |
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What is the stock compression on the N54? If I were you, I'd run 10.5:1 comp pistons. You should get better off turbo power and a lot better spool up with the turbo's and more power per psi of boost (the turbo's will run in a better efficiency area at a lower boost for the same power you'd get with more boost at 9.5:1 comp). In my stock block Honda S2000, it's comp is 11:1 and I run 35 psi of boost; around 850 whp.
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01-06-2013, 12:32 AM | #44 | |
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I expect this to change when the Vargas Stage 3 Turbos & ProEFI are both released. Once people start seeing 700-800 WHP & are using a standalone, we're gonna start seeing the OEM internals fail (~3 times the OEM WHP) |
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