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10-31-2014, 06:36 AM | #947 |
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I've been following this thread for a while and haven't seen it asked. Will the tuning be via a piece of obdII hardware or does the ecu need to be sent out to be programed? Through looking on their site, they do have obdII hardware. Would it be included in the kit or cost extra?
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10-31-2014, 07:48 AM | #948 |
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I would've been all over this kit if I had kept my 328 coupe! I ended up moving to a 335 sedan though because I wanted 4 doors and the exact right color/options combo came up!
I'm genuinely curious to see some performance tests and numbers on this setup!
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10-31-2014, 09:39 AM | #949 |
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This is really something that should be clarified better.
+WHP on 220 WHP from a 330 vs 190 WHP from a 325i is a big difference. It'd be nice to hear if having the 3-stage manifold is still beneficial (or even harmful) from the guys that did so much R&D on it.
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10-31-2014, 10:39 AM | #950 |
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Software willl bring the 325I up to 330I levels if you have the manifold. If you don't, I'd imagine the 325i/328i will be on the same level.
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10-31-2014, 11:17 AM | #951 |
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I think his concern is the use of DISA with the SC. I would suspect you don't want to run DISA and SC at the same time as the DISA is well known to be fragile compared to the standard manifold used on the 328i n52b30.
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10-31-2014, 11:47 AM | #952 |
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I actually just emailed Roman about this. Let's see what he says.
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10-31-2014, 12:06 PM | #953 | |
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danger to the manifold!!!! |
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10-31-2014, 12:30 PM | #955 | ||
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Software will be done via our remote tuning cable. We will email you the file. Quote:
Intake does not matter, you can leave it. |
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10-31-2014, 01:57 PM | #956 | |
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I'm glad he feels confident about it. If it were my car I'd simplify things for the FI. Many have run into issues with DISA w/out any FI. Am yet to see any issues with the standard manifold |
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10-31-2014, 02:08 PM | #957 |
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except, you're just speculating. 6psi is hardly going to be enough to break the manifold - plastic intake manifolds have been used by BMW for decades without issue (boost or not). the DISA motors don't care, the pressure is going to be the same on both sides of the flap anyway.
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10-31-2014, 02:12 PM | #958 |
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If the intake doesn't matter, then 325 and 330 should end up with same hp after sc, right?
And 328 should have less hp than 325 (assuming above statement is correct), because 328 has lower compression ratio. Right? |
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10-31-2014, 02:19 PM | #959 | |
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10-31-2014, 02:29 PM | #960 |
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The N51 has 10.0/1 compression and the N52 has 10.7/1 compression. The N51, for emission reasons (super ultra low emissions), was mandated I believe in five states, with California being one of the five. So the 328i used both variations depending on the state it was originally sold in. Both engines are rated at 230 horsepower, but the N51 has the 3-stage intake manifold to offset the difference in compression.
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10-31-2014, 02:31 PM | #961 |
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10-31-2014, 02:33 PM | #962 | |
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Yes, that's exactly what I was asking, since the intake doesn't matter, 328 n51 should have less power with the sc, compared to a 328 n52 with sc. And again, if intake doesn't matter then 330 and 325 will have similar performance, and sc will put them at the same hp number And since 328 has lower compression ratio than 325 too, 325 should have more hp then 328 after the sc, because the intake doesn't matter.. Unless Roman meant reliability when he said the intake doesn't matter... |
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10-31-2014, 03:05 PM | #963 |
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If the flaps weren't balanced they'd go kaput. Balanced plastic flaps are subject to load stress and may (or may not) bend. You do what you like to your car
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10-31-2014, 03:15 PM | #964 | |
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ˌspekyəˈlāSH(ə)n/ noun 1.The forming of a theory or conjecture without firm evidence. Until you have proven or been provided real life test results showing no adverse effects on the intake manifold and all of its components (that was designed without the need to support boost pressures),you are speculating. Passing on speculations as truth can cost people a lot of money and make yourself look stupid in the process. |
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10-31-2014, 05:31 PM | #965 | |
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The reality is that in naturally aspirated form, the DISA manifold operates at 14.5 psia (psi absolute); what we call atmospheric pressure @ sea level or 0 psig (psi gauge). At Atmospheric pressure, the system works, the designed resonance chambers and DISA flaps work with the engine's resonance frequencies / valve openings at set RPM points. The intake manifold is more or less a closed system. Increasing the pressure from 14.5 psia to 20 psia (5 psig of boost) will not change the function or operation of the DISA system. The engine still has the same resonance frequencies. The intake manifold and DISA system do not reference ambient pressure to function, making it a closed system. Increasing the intake pressure makes no difference to what is going on in the Intake Manifold or the resonant frequencies of the engine. Think about it, the system also works at both high and low altitude and this is a change in pressure (albeit a small one). The only function of the intake manifold that is changed by boost pressure is the crank case ventilation system. Looking forward to getting the kit on my wagon...
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F15 35i : MHD EWG, FMIC, 4" ER DP; E70 35i : MHD, ER Downpipe; E53 4.4i : 31.5" BFG K02s on BBS Style 19s Last edited by rhombus; 10-31-2014 at 06:53 PM.. |
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10-31-2014, 08:42 PM | #966 | |
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10-31-2014, 09:03 PM | #967 | |
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WHP would be around 280 or less assuming the 328 is making 200 whp ( maybe less) For me that is a pretty respectable number for the 328... The is 350 , g37 , v6 camaro , v6 mustang and v8 challenger and 335 are around 300-350 HP at crank. Difference would be the 335 with a tune is not match for the rest but I dont see anyone putting a supercharger in their g37 and is350 or the v6 camaro or mustang I used http://www.mk5cortinaestate.co.uk/calculator4.php which is pretty accurate most of the time It is also nice that their kit would be under 5k , a lot more affordable for a lot of people. Last edited by rick100; 10-31-2014 at 09:16 PM.. |
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10-31-2014, 09:48 PM | #968 | |
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I'm not one of the new guys that just learned about the 3 stage manifold swap yesterday, lol. If what you say is true, then the SC is not compatible (by means of reliability) with 330i's or 328's with N51's. THIS is what I want clarification from Roman on.
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