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03-17-2012, 04:33 AM | #23 |
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Saw the same issue on the BMW 1Series, normal 120d has 147hp, 120d limited Sport Ed has 177, but can find any differences. Got the BMW Performance Power Kit for my 120d LSE, took it to 200hp, but required new motor control box, inter cooler, hoses and a new torque converter, but no internal differences with the 118d, 120d and the 123d. Must be marketing and profit margin...
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04-02-2012, 07:00 PM | #24 |
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I've spoken with a few tuners and they're waiting for the hack companies to produce a release. Once that's done the tuners will then be able to play with the sensors (so I am told!). My understanding is that the Kelleners pass through cannot access all of the sensors and hence is limited by how much power it can release. Given that the part numbers are identical I'm confident (and slightly wishful!) that the 20i can be "released" to have the same power as the 28i. Here's hoping!
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04-02-2012, 07:02 PM | #25 | |
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04-06-2012, 08:14 AM | #27 | |
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It steers and shifts MUCH lighter and better than my E90. I am VERY pleased with it Now just waiting for the 'hack' to get it to the 28i power and I'm a super happy man |
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04-08-2012, 01:10 PM | #28 |
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I've checked the difference between 520i and 528i is in the compression ratio 11:1 vs 10:1
All parts are the same including engine blocks, crankshaft, cylinder head, head gaskets, drive shafts and transmission etc. The only part I find different is the piston, there are two types of pistons; one for lower compression engines (S858a=yes). Given the head gaskets are the same, the piston should be the part that reduced the compression ratio in 528i. Don't know if the quality of the two pistons are the same or not? Maybe just changing the head gasket to reduce compression ratio to 11:1 and remap ECU will do, any other thoughts?
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04-09-2012, 08:33 PM | #29 | |
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04-11-2012, 09:30 AM | #30 | |
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04-23-2012, 09:11 PM | #31 | |
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The piston is the same for both engines on Z4. http://www.realoem.com/bmw/showparts...70&hg=11&fg=20 http://www.realoem.com/bmw/showparts...70&hg=11&fg=20 |
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04-24-2012, 08:14 AM | #32 |
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Correct.. there are some other minor tweaks but essentially its a software over boost to get the extra 35 or so horses, but even then, its a temporary over boost so most of the time its essentially a 35i with extra badges and a higher price tag!
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04-25-2012, 02:44 AM | #35 |
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Gotta be nice... living in a petrolhead-friendly country...
28i no punch? Don't really get what you want with the Z4 then.. Maybe you were better off buying a Boxster or even a Carrera convertible then? Z4 is more of a GT car than a racer |
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04-26-2012, 07:43 PM | #36 |
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Terry at Burger Motor Sport is coming to your rescue soon.
http://www.n54tech.com/forums/showthread.php?t=15536 He just started on the 328i N20 and has it doing 0-60 in 4.9 so far and 13.4 sec 1/4 mile.
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04-28-2012, 09:47 AM | #38 |
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[QUOTE=z4z4z4;11841531]Terry at Burger Motor Sport is coming to your rescue soon.
http://www.n54tech.com/forums/showthread.php?t=15536 He just started on the 328i N20 and has it doing 0-60 in 4.9 so far and 13.4 sec 1/4 mile. [/QUOTE so in stock mode we are only getting 190 whp? I forgot which magazine but they did a dyno run and was getting 220 whp / 260 tq. Man a 70 whp + gain / 100TQ would honestly great. I just hope BMS doesn't charge 2g for it. |
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11-03-2012, 10:41 AM | #42 | |
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Also got twin echaust pipes with your 20i? The burble at the upshifts in the first and second gear are also awesome, third gear is barely noticable unfortunately. It's a bummer that the pops doesn't occur when your higher in the RPM range |
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11-13-2012, 10:01 AM | #43 |
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I've put the TMC box into this car and have noticed a big difference. Performed a dyno before and after which shows a 51bhp increase. What's more impressive is that peak torque is 270 lb/ft which is more than the standard 28i. Strongly recommend this for anyone looking for a power hike. Been running for nearly 2 months now with no issues.
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11-15-2012, 11:19 AM | #44 | |
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