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09-18-2018, 10:21 AM | #2 | |
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09-18-2018, 12:16 PM | #4 |
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Don't get me wrong, 252whp is pretty darn good!
I think 300whp without opening up the motor is a pipe dream, though. I bet he tops out at ~260whp with MILVS. none of that other stuff makes any difference. That seems like it should be plenty of power in a 128i though! |
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09-18-2018, 01:10 PM | #5 |
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I thought the .5mm MILVS were worth 8 whp? So the 1mm version should be worth more?
And secondary delete has shown nearly 10 whp, and I think that was without headers. So maybe he'll hit 275 if he is lucky. I still don't think E85 is worth it for N/A applications, though.
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09-19-2018, 11:38 AM | #7 |
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He's hoping for 300 whp N/A. I didn't have the heart to tell him... lol
I'll be amazed when I see a 275 whp N/A N52.
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09-19-2018, 02:07 PM | #8 | |
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I bumped the thread a few months ago I’ll post a link if I can find it again... Edit: Here it is... https://www.e90post.com/forums/showthread.php?t=737221 |
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09-19-2018, 02:34 PM | #9 |
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Haha yeah now I remember that.. okay okay I should have specified on a daily driver.
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09-23-2018, 12:29 PM | #11 | |
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I myself, am running an e40 mix because anything more than that and the AFR would lean out too much.
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09-24-2018, 11:28 AM | #12 | |
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If you ran full e85 on the stock injector, you would need around 22 - 30% more fuel to equal the same rwhp as pump gas. So the max hp you can make on full e85 and stock injectors is 225rwhp (@80% duty). With our e85 testing we've done on the n52, we've maxed out the injectors at 89% duty and made 237rwhp. (3 stage intake, stock exhaust manifolds). So if you want to run e85 your going to need to upgrade the injectors in order to get max power out of the setup. Is it worth running e85 on an na setup like the n52? Yes if you want to see the max hp you can get out of an unopened engine, but you are going to be capped at around 260rwhp and in order to make anymore power, custom cams or power adder is going to be needed. The n52 is close to the s54 in respect to head design, and intake valves are close as well (35mm vs 34.2 on the intake) and (30.5 vs 29mm) on the exhaust. But where the s54 really shines is the max lift (12mm vs 9.8mm) on both cams, the compression of the engine (11.5:1 vs 10.7:1) and displacement (3.2L vs 3.0L. Most full bolt on s54 I tune (cold air, headers and exhaust) make right around 300 - 315rwhp and with a CSL intake and a set of cams around 330 - 350rwhp. I think if you can get a proper set of cams made for the n52 and using the revv happy n54 intake we can see 300rwhp on pump gas. |
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09-24-2018, 11:57 AM | #14 | |
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I always knew there was more in the N52 all it needs is a good set of cams. I dont know what material the n52 cams are made out of but i used delta in the past to do custom regrinds on steel core cams for me in the past with great success http://deltacam.com/ |
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09-24-2018, 12:15 PM | #16 | |
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N52 Int 255 Exh 263 S54 Camshaft spread, intake (crankshaft degrees) 130-70 Camshaft spread, exhaust (crankshaft degrees) 128-83 N52 Camshaft spread, intake (crankshaft degrees) 120-50 Camshaft spread, exhaust (crankshaft degrees) 115-60 Having that larger exhaust valve and extra lift really helps. EDIT: forgot to add the n54 exhaust cam is very close to a s54 exhaust cam, only if it had the lift to match. Camshaft opening angle, exhaust (crankshaft degrees) 261 Camshaft spread, exhaust (crankshaft degrees) 130-85 Max Lift 9.7mm Last edited by Bob@BPC; 09-24-2018 at 12:22 PM.. |
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09-24-2018, 12:17 PM | #17 | |
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09-24-2018, 12:20 PM | #18 |
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getting an exhaust cam made would be easy though.
The interesting thing is the N5x engines have more Vanos adjustment than any past BMW engine. but the S54 can retard the intake cam another 10 degrees. I always wanted to try re-timing the cams, almost none of the maps go as low as 50 degrees anyway. |
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09-24-2018, 12:25 PM | #19 | |
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What is the flow rate, lb/hr, of the larger M3 injectors used in the Turbo and Supercharged N52s? |
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09-24-2018, 12:32 PM | #20 |
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36lbs/hr
Last edited by Bob@BPC; 09-24-2018 at 12:38 PM.. |
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