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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning Modded M235i question !!! Stage 1 hp tq?

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      10-26-2014, 05:14 PM   #1
Anderw
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Just curious to talk to some owners about what thought about stage 1

So I got a pretty good deal on a stage 1 tune , I intend on upgrading it stage 2, my question is BMS claims 40whp 50wtq . I have seen stock dyno ranging from 300whp to 320whp stock.

Now paired with a BMS intake and MPE (not for power but sound) theoretically should I be 350whp-375whp on 93oct and cold NJ air.

I plan to see how I like the power , and after a few thousand miles move toward stage 2 jb4,
Bms Charge pipe , FMIC , and catless DP.

Anyone with a stage 1 tune who wants chime in would be appreciated
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      10-26-2014, 05:40 PM   #2
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It all depends on the dyno, a Mustang(reads way lower) and a Dynojet(higher). Also depends on if you have 91, or 93 octane. Density altitude plays a huge role as well on dyno numbers. Just to put that into perspective, up here at ~4500ft altitude with 91 octane, running a low reading Mustang Dyno. A 2013, 662hp Shelby GT500 dynoed at 475WHP.

Don't forget the 235 already comes "tuned" with a 20hp/30tq power bump over the other N55's in BMW's lineup.

I would think realistically with 93 you could gain 20-25hp and 30-40tq. A little less with 91.
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      10-26-2014, 05:49 PM   #3
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Yeah I probably should have mentioned where I live is Literally right at sea level, And only will be using 93oct. I guess it makes sense the 235i has a bit of a tune compared to a regular n55. Though Is it only a factory boost increase? I guess closer to 350whp 375wtq with the listed stage 1 tune and mods. Not sure the drive train loss but at 12% it's 42hp so 400crank is not ridiculous to think possible especially if the tune is just upgraded to stage 2 and the intake
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      10-26-2014, 08:17 PM   #4
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You should get a baseline dyno to see where you are at, preferably if you can dyno the same day you do your mods.

I think your numbers are a bit aggressive based on stage II dyno results with more mods I have seen on this site. I would guess with the stage I and mods you mention 330 whp and 355 wtq.

They say key words like "up to" and "with supporting mods". I read it that the mods you mention are already factored into that up to high number that you MIGHT see.

Only way to know is to get a dyno.
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Last edited by G-Mann; 10-26-2014 at 08:49 PM..
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      10-26-2014, 08:24 PM   #5
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Quote:
Originally Posted by G-Mann
You should get a baseline dyno to see where you are at, preferably if you can dyno the same day you do your mods.

I think your numbers are a bit aggressive based on stage II dyno results with more mods I have seen on this site. I would guess with the stage I and mods you mention 330 whp and 355 wtq
Yeah , I agree I am just going by the claimed 40+whp 50+wtq on their website. I do plan on being full bolt on and even some e85 blends once I feel comfortable with the car , after a few years maybe even a turbo swap. I am just used to n54 talk since that's where I came from. I really could care less about the numbers Im more interested in how it feels to be honest
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      10-26-2014, 11:22 PM   #6
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I think you will like how it feels. I have stage II on map 2 with DP and CAI and could not be more thrilled with how it feels.

I hear ya on the claimed 40 plus gains and they do deliver this over the stock advertised numbers but most if not all of these cars are doing a bit better than the advertised numbers.

Your starting from the numbers you see most people are putting down real world and they are starting from the manufacturers numbers, a 15 to 20 starting point difference.
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      10-27-2014, 10:09 AM   #7
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I was on Stage 2, Map 2 with a BMS Intake and a ER Downpipe and I only managed 350whp/390wtq on 93 gas.
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      10-27-2014, 10:16 AM   #8
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Delnari has dynos he's posted of exactly what you're asking. You won't be at 350whp with stage 1 and intake.
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      10-27-2014, 11:21 AM   #9
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Quote:
Originally Posted by alz0rz
I was on Stage 2, Map 2 with a BMS Intake and a ER Downpipe and I only managed 350whp/390wtq on 93 gas.
Was heat an issue ? I'm gonna upgrade it to stage 2
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      10-27-2014, 11:23 AM   #10
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Quote:
Originally Posted by qballis
Delnari has dynos he's posted of exactly what you're asking. You won't be at 350whp with stage 1 and intake.
Yeah the claimed 9whp for the intake 40whp for the tune is not accurate then. Well maybe it is just not if you have a 235i maybe on a 335i or regular n55 not rated 320hp factory
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