12-03-2018, 10:04 AM | #1 |
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This guy claims 400+bhp with breathing mods only, possible?
Hi I'm not saying it's not possible I genuinely want to check as I am likely to get an OG M2 next year and want to know my options.
Rather than outright power I want an engine that is happy to rev and worry about cut off points I've seen for the n55 in the M2 on Dyno charts. He may even post here I don't know but he says his numbers are with NO ECU work. http://www.babybmw.net/viewtopic.php?t=110803 My planned mods so far are: AST/Litchfield suspension package, Fabspeed DP, autoID M-inspired mirrors Cheers |
12-03-2018, 10:53 AM | #3 |
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Fabspeed claims 16 peak whp gain with their sport cat dp. It gets you close to 400 bhp but not quite.
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12-03-2018, 12:47 PM | #4 |
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A bone stock M2 makes around 330hp to the wheels. Assuming a 15% drivetrain loss, that puts stock power at around 390bhp. So yeah, the M2, like all other turbo BMWs is quite underrated.
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12-03-2018, 02:25 PM | #6 |
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Ok I don't really care if it's not wheel horsepower he's quoting obviously it's engine/at the crank what I wanted to know is why you don't see threads pertaining to his particular set of mods in order to get frankly a lot more power without remapping?
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12-03-2018, 02:38 PM | #7 |
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It's not "a lot more power" it's 35 more than stock. For the amount of money adding all those parts, it's cost effective to do a tune as well, especially to optimize everything, which more than doubles the horsepower those parts might provide alone.
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12-03-2018, 02:38 PM | #8 | |
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Here is one graph I saw https://www.2addicts.com/forums/show...2&postcount=34 |
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12-03-2018, 06:23 PM | #9 |
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Intake won't really get you any power so the obvious place is going to be downpipe. Downpipe will add 10-20 hp depending on how much you believe in manufacturer testing. I had the Fabspeed downpipe on my M235i and it's a great piece of equipment, but I don't think it added 20 hp. It did create a great soundtrack though.
As for IC that counts more towards being able to consistently put out power. Not calling the guy/gal a liar, but 370 hp to 424hp on chargepipe, IC, downpipe, etc seems optimistic to me without an ECU tune. |
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12-04-2018, 12:31 AM | #10 |
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400 is realistic when you consider bmw underrates the power a tiny bit.
I call BS on 425. We measured a mhd stg2+ M2 with 419 At the crank of course. We dont measure whp somehow in europe |
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12-04-2018, 12:42 AM | #11 | ||
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Fettled M135i EB AT then AW M2 DCT - both gone but not forgotten:
Current '22 X3M LCI.. |
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12-04-2018, 12:57 AM | #12 |
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Guys, wheel or crank horsepower doesn't really matter. The post show a delta of 60+ hp difference on the same stock map before and after hardware mods.
My take on it is that DP/FMIC/Inlet(not to be confused with intake/filter) should be good for 20~30hp dependent of how hot it is outside, or more precisely by how much the ignition timing was already backed off without bolt-ons. The rest of difference should come from the combination of environment variance, measuring error and conversion variance from whp & drivetrain drag to crank.
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12-04-2018, 07:45 AM | #13 |
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Yes as noted above this is a dynamic increase in power and yes due to the way internal combustion works for relatively simple bolt on airflow mods a 10+% increase in power for a thermally limited product that is the IC engine is in fact significant.
You realise this reading about the R8 V8 engine mod pages. Usually a lot of money or rework is needed to get N/A performance increases. I know the N55 is turbocharged and still thought the gains worthwhile, to me, without over- stressing the engine via a tune. My current car is stage one and it's great, a new lease of life. But I 1) don't particularly think the OG M2 needs more power for road use/enjoyability, even if the chassis can take it and 2) have read the N55 is near at its natural limit as supplied and tuned by BMW, last thing I want to do is fry an engine with an 'M' moniker on it and deal with associated costs. I'm glad this has sparked debate as that was the intended purpose. |
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12-04-2018, 10:10 AM | #14 | |||
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Software is untouched. Ah and on a side note: i found the oem paper air filter collapsed like it had a hard time withstanding the air flowing trough. Installed a BMS filter after seeing it. |
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12-04-2018, 06:43 PM | #15 |
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Yea, you are already risking your warranty. With a tune you can at least have the computers on the car "tuned" for the aftermarket parts rather than for a stock car that is no longer stock.
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12-05-2018, 07:19 AM | #16 | |
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12-05-2018, 07:35 AM | #17 | ||
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See picture below: |
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01-21-2021, 07:49 AM | #19 |
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