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      01-09-2019, 11:29 AM   #1
F30.nyxie
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N20 build - what next?

Unsure what to upgrade next on the n20 328ix! Although we street drive our car, we're focusing most performance for drag and show. Here's what it currently has:

ENGINE:
- Burger Tuning jb4
- FTP Motorsports chargepipe
- VRSF 5" street HD intercooler
- GFB DV+
- K&N drop-in

EXHAUST:
- 4.5" VRSF catless DP
- Straight pipe

SUSPENSION:
- H&R sports springs

Here's how it looked like stock (plus tinted lights)
https://flic.kr/p/2e7NdLg

and currently:

https://flic.kr/p/23vkT82


I heard our tuner/performance shop that an intake on these engines would actually rob it by ~5hp+ (hence why we went with the k&n drop in filter). They usually take the cones off during dyno runs to get a better HP reading. Although they sound sweet, I don't see the point spending 500$ to get less HP... any thoughts on this?

We haven't gotten a complete dyno run on it, but we're estimating she's in the 300hp+.

DRAG TIMES: The best we've had on 1/4 mile drag is 12.9, but usually we're in the 13.0-13.2 depending on temperature. Jb4 map 2.

WISHLIST:
- Upgraded rods & pistons
- Oil cooler
- Air Lift Performance suspension
- bootmod3 has anyone went from jb4 to bm3? Thoughts/dyno runs?

What do you guys recommend? We would like to consistently hit the 12's.
This summer we're hoping try E85 and see if that makes a difference.
We were hoping to get to it last year, but bimmer was running wonky and had it towed to upgrade the timing chain guides to prevent the pos failing 2012-2014 oem ones instead, and then drag strips had closed for the season.
https://flic.kr/p/2e7NcTp

Any input and suggestions as what to do next?

Last edited by F30.nyxie; 01-09-2019 at 11:41 AM..
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      01-09-2019, 01:33 PM   #2
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MHI Big Turbo
AP Racing BBK
335i Akrapovic Performance Exhaust
Fuel-It Stage 2 LPFP
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      01-09-2019, 01:38 PM   #3
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Quote:
Originally Posted by anotheran View Post
MHI Big Turbo
AP Racing BBK
335i Akrapovic Performance Exhaust
I'm scared that big turbo = piston cracking and rod bearings failing.
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      01-09-2019, 02:42 PM   #4
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Pretty maxed out as far as bolt ons go

LCI tail lights and gloss black m performance kidney grilles would both be nice additions
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      01-09-2019, 03:24 PM   #5
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Quote:
Originally Posted by F30.nyxie View Post
I'm scared that big turbo = piston cracking and rod bearings failing.
You'll need less boost for the same power with a big turbo. Ask the other guys here who have installed their MHI but haven't switched to forged rods.
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Last edited by anotheran; 01-09-2019 at 08:06 PM..
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      01-09-2019, 04:25 PM   #6
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The stage 2 turbo can actually make a little more power at a little less psi and more conservative tuning, which would make it actually more safe/reliable than the factory turbo. Now if you installed the stage 2 turbo and pushed it to the limit, not so much....

Do you still have the 2.25" bottle neck where the down pipe meets the exhaust?
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      01-09-2019, 04:56 PM   #7
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I think a big turbo is the next logical step. If you keep boost reasonable and switch to a good flash tune, or better yet a custom dyno tune, you'll be in good shape most performance and reliability wise, even more reliable than now with the JB4. BM3 is the platform for both custom and OTS flash.

Interested to hear more about how you got into the 12's on 93 though. Looks like you have a pretty basic stage 2 setup, so 12's is a damn good time. Must've been great conditions. Best I got was 13.08 in what I thought were good conditions. DA was about 100ft
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      01-09-2019, 06:45 PM   #8
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      01-09-2019, 06:51 PM   #9
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Nice write up! Personally, I like the glacier silver but I'm biased haha

Do you have time slips? Sorry they are posted, I'm on mobile and I missed them
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      01-09-2019, 07:16 PM   #10
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Quote:
Originally Posted by rjdnyy224 View Post
I think a big turbo is the next logical step. If you keep boost reasonable and switch to a good flash tune, or better yet a custom dyno tune, you'll be in good shape most performance and reliability wise, even more reliable than now with the JB4. BM3 is the platform for both custom and OTS flash.

Interested to hear more about how you got into the 12's on 93 though. Looks like you have a pretty basic stage 2 setup, so 12's is a damn good time. Must've been great conditions. Best I got was 13.08 in what I thought were good conditions. DA was about 100ft
this you? lol
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      01-09-2019, 07:45 PM   #11
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Quote:
Originally Posted by bmwchue View Post
this you? lol

You got it man! lol That's me, that video shows the best pass I was able to make. Can't remember the mile per hour but it was 13.088. The details are in the description of the video lol.
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      01-09-2019, 11:16 PM   #12
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Do you have a CEL with your DP? Debating on doing that next for my N26.
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      01-10-2019, 08:35 AM   #13
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Quote:
Originally Posted by rjdnyy224 View Post
I think a big turbo is the next logical step. If you keep boost reasonable and switch to a good flash tune, or better yet a custom dyno tune, you'll be in good shape most performance and reliability wise, even more reliable than now with the JB4. BM3 is the platform for both custom and OTS flash.

Interested to hear more about how you got into the 12's on 93 though. Looks like you have a pretty basic stage 2 setup, so 12's is a damn good time. Must've been great conditions. Best I got was 13.08 in what I thought were good conditions. DA was about 100ft
We got 12.9 only once on 94, but still gives us hope that it can be consistently achieved with a bit more power. I'll dig through my computer and see if I can find drag videos
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      01-10-2019, 08:38 AM   #14
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Quote:
Originally Posted by Rokoz View Post
Nice write up! Personally, I like the glacier silver but I'm biased haha

Do you have time slips? Sorry they are posted, I'm on mobile and I missed them
We own and operate a wrap shop, so we need to keep our cars wrapped. We'll be removing this one and switching it up in the spring, i'm open to suggestions as to what colour you guys would want to see.

Will try to upload drag vids/timeslips today
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      01-10-2019, 09:04 AM   #15
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Quote:
Originally Posted by IH8I405 View Post
Do you have a CEL with your DP? Debating on doing that next for my N26.
Any catless DP will give you a CEL, and pretty much any catted DP will as well. I say "pretty much any" because all the ones I know of will give you a CEL, but it's not an impossibility that you find one that won't.
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      01-10-2019, 09:04 AM   #16
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Quote:
Originally Posted by F30.nyxie View Post
We got 12.9 only once on 94, but still gives us hope that it can be consistently achieved with a bit more power. I'll dig through my computer and see if I can find drag videos
Gotcha. Still a great time and cool for me, someone who would love to go 12's in this car, to see that it's possible lol. Looking forward to checking out the slips and videos
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      01-10-2019, 09:21 AM   #17
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Quote:
Originally Posted by rjdnyy224 View Post
Any catless DP will give you a CEL, and pretty much any catted DP will as well. I say "pretty much any" because all the ones I know of will give you a CEL, but it's not an impossibility that you find one that won't.
Thanks! I am about to order a catless dp and didn't want any surprises. I am OCD about the lights on my dash. Did some more reading after your response, so looks like I might need a different tune like bm3 to shut that CEL off if it comes up.

Currently have a JB Stage 1 in my N26.
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      01-10-2019, 09:38 AM   #18
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These were the two videos I was able to find, however no time slips
We'll have some as soon as the track opens late spring.

VS STREET BIKE:


VS DRAGSTER:
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      01-10-2019, 09:38 AM   #19
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Quote:
Originally Posted by IH8I405 View Post
Thanks! I am about to order a catless dp and didn't want any surprises. I am OCD about the lights on my dash. Did some more reading after your response, so looks like I might need a different tune like bm3 to shut that CEL off if it comes up.

Currently have a JB Stage 1 in my N26.
Yep, get a good flash tune like BM3 and you won't have to worry about the catless CEL.
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      01-10-2019, 09:41 AM   #20
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Quote:
Originally Posted by IH8I405 View Post
Thanks! I am about to order a catless dp and didn't want any surprises. I am OCD about the lights on my dash. Did some more reading after your response, so looks like I might need a different tune like bm3 to shut that CEL off if it comes up.

Currently have a JB Stage 1 in my N26.
We have jb4 and it didn't throw any CEL codes.

Does bm3 prevent the dash lighting up light a christmas tree as well, similar to jb4? We're strongly considering switching up to it, our performance mechanic has advised to do the switch this as well.
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      01-10-2019, 09:51 AM   #21
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Quote:
Originally Posted by F30.nyxie View Post
We have jb4 and it didn't throw any CEL codes.

Does bm3 prevent the dash lighting up light a christmas tree as well, similar to jb4? We're strongly considering switching up to it, our performance mechanic has advised to do the switch this as well.
Yes, BM3 will clear the cat codes. It won't prevent the any other codes from being thrown, so if your ABS goes out or if you have a real engine issue, the lights will still go off. But it won't cause any codes itself. I hope that makes sense lol.

Either way, I cannot recommend BM3 strongly enough. I've been running stage 2 with a catless DP and absolutely love it. The fact that it's a flash, the customizability, and the ability to datalog and read codes makes it an absolute no-brainer.
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      01-10-2019, 10:30 AM   #22
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Quote:
Originally Posted by rjdnyy224 View Post
Yes, BM3 will clear the cat codes. It won't prevent the any other codes from being thrown, so if your ABS goes out or if you have a real engine issue, the lights will still go off. But it won't cause any codes itself. I hope that makes sense lol.

Either way, I cannot recommend BM3 strongly enough. I've been running stage 2 with a catless DP and absolutely love it. The fact that it's a flash, the customizability, and the ability to datalog and read codes makes it an absolute no-brainer.
Similiar to jb4, will still throw engine and other codes.

Datalog itself is a game-changer for sure.
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