BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > M135i aftermarket mods and results
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      03-31-2014, 05:42 AM   #1
Bruce GT3
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M135i aftermarket mods and results

Just realised I'd been rather remiss and not actually posted any of the results from my tinkering with my 2013 N55 M135i...

So in short I will say that the car was dyno'd at Surrey Rolling Road in the UK along with several other 1-series cars a couple of weeks ago. They use a Dyno Dynamics RR in shoot-out mode and this is usually a very stern and honest piece of kit.

The standard M135i's (and those with BMWMP exhausts) made the correct and expected numbers of around 325hp, 330 ftlb

I was very happy to achieve a rather better than expected 394 hp and 450 ftlb

Performance mods on my car (so far) are a BMS JB4 running Map 2, full Scorpion decat downpipe and exhaust system, Forge Motorsports intercooler and BOV, Birds/Quaife ATB diff

As you can see, there aren't that many mods on the list so far and I have several more in the pipeline -including a Forge charge pipe, Forge intake and then the addition of water/meth injection should hopefully see me over the 400 mark,,,
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      03-31-2014, 10:09 AM   #2
ILUSV
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Nice numbers... Still stock with 1400 KM - no fun yet
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      04-04-2014, 09:11 AM   #3
Bruce GT3
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Ok chaps.

Since you asked for it I'll try and layout all my mods and the respective gains achieved at each stage. Obviously these weren't all tested on the same rolling road and on the same day and the car will have loosened up over time but hopefully it should give all those interested an insight into what's possible. These numbers are all backed up by dyno plots, most of which I was present for...Please don't shoot the messenger or start a dyno flame-war; we all know how unreliable a lot of dyno data can be... :roll:

0. Stock; 322 hp, 334 ftlb

1. Scorpion catback exhaust to replace OEM system; 334 hp, 340 ftlb

2. Scorpion decat DP added to TBE above; 342 hp, 358 ftlb

3. JB4 Map 2 added to above; 378 hp, 440 ftlb

4. Forge FMIC and BOV added, dropped IAT from 60 degC to 30 degC; 394 hp, 450 ftlb

5. ???? :twisted: :twisted: :twisted: :twisted:
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      04-04-2014, 10:26 AM   #4
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So in stock form it Dyno-ed more than what BMW rated it?
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      04-04-2014, 10:28 AM   #5
Bruce GT3
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Quote:
Originally Posted by ILUSV View Post
So in stock form it Dyno-ed more than what BMW rated it?
Oh God, here we go....

Yes, it did dyno slightly more but that's only slightly

Most of the stock UK cars I've seen run on a dyno came out bang on the quoted numbers, give or take....
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      04-04-2014, 11:15 AM   #6
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Here we go? Are people giving you hard time about your numbers? The F30 N20 I had prior to the F20 felt stronger than the rated 240 HP (on the Butt Dyno) 😜
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      04-05-2014, 04:00 AM   #7
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Quote:
Originally Posted by ILUSV View Post
Here we go? Are people giving you hard time about your numbers? The F30 N20 I had prior to the F20 felt stronger than the rated 240 HP (on the Butt Dyno) ��
No grief given to me...

It's just that these threads frequently descend into a "my dyno is more accurate than yours" type of debate!!
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2013 M135i N55 F21 | Scorpion TBE and Decat |AirREX & Accuair air-ride | JB4 Stage 2 | BMW MP Blackline lights | BMW MP grills | SSDD Carbon Splitter | Birds/Quaife ATB diff | Forge intercooler and atmo BOV

Last edited by Bruce GT3; 04-05-2014 at 07:40 AM..
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      04-05-2014, 04:55 AM   #8
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How does the Quaife LSD perform? We've just begun importing on one M135i. Thanks in advance for your input.
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      04-07-2014, 07:17 AM   #9
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Does Forge make intercooler for M135i ?
What is the part# ?
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      04-08-2014, 04:26 AM   #10
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Quote:
Originally Posted by westphone View Post
How does the Quaife LSD perform? We've just begun importing on one M135i. Thanks in advance for your input.
Quaife unit is a very good match for road-based use. Being an ATB it doesn't lock-up under braking. I've noticed the traction control and light is less prone to kicking in and I do get a discernible difference in the way power is put down. You also get the ability to do nice controlled power slides as well!!

Quote:
Originally Posted by darmawaa View Post
Does Forge make intercooler for M135i ?
What is the part# ?
The Forge FMIC is probably too new to show up on the website and in catalogues. If you contact Chris Lloyd at Forge UK on Chris@forgemotorsport.co.uk he should be able to sort you out.
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