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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > 335xi FBO + Meth mustang dyno (408awhp/483awtq)



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      10-01-2013, 12:06 AM   #23
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Originally Posted by stashtrey
This makes me want to install meth.

Assuming you are MT....do you have any upgrades or issues/fears with your xi drivetrain?? I'm xi and AT6 step. Worry about overworking the tranny and awd system.

Did you have the catless dp's before you added meth? I am stock on DP's and don't want to mess with them bit do like the idea of meth!!
Don't worry about any of that, IMO. The fact that you're concerned is enough to predict that if you do get meth, you'll be fine. I set up meth (first on stock DPs, then added them a few months later) and did countless 19psi brake boosted launches. And I know of probably at least two others who've put their XIs through more abuse from a dig and none of us had any drivetrain issues. Even when one of us 6AT XIs ran nitrous, cutting 3 seconds flat 0-60.
Obviously YMMV... But the concern shows that you won't be as crazy with it as many before you have been. You won't regret doing it once it's done. Especially if IATs are a concern. In AZ meth was perfect. Ambient IATs pushing stock turbos to the limit is worth the minimal risk.
And don't do a WW meth kit. Please.
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      10-01-2013, 01:37 PM   #24
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Originally Posted by nailer335 View Post
Don't worry about any of that, IMO. The fact that you're concerned is enough to predict that if you do get meth, you'll be fine. I set up meth (first on stock DPs, then added them a few months later) and did countless 19psi brake boosted launches. And I know of probably at least two others who've put their XIs through more abuse from a dig and none of us had any drivetrain issues. Even when one of us 6AT XIs ran nitrous, cutting 3 seconds flat 0-60.
Obviously YMMV... But the concern shows that you won't be as crazy with it as many before you have been. You won't regret doing it once it's done. Especially if IATs are a concern. In AZ meth was perfect. Ambient IATs pushing stock turbos to the limit is worth the minimal risk.
And don't do a WW meth kit. Please.
+1 I wouldn't stress about it. Definitely don't do a WW kit though
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      10-02-2013, 09:42 AM   #25
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great numbers man!!!
i see you got vrsf v2 exhaust, how loud is it? In comparison catless dp's to catless dp's with vrsf exhaust??? Any gains?
Worth the money?
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      10-02-2013, 01:50 PM   #26
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great numbers man!!!
i see you got vrsf v2 exhaust, how loud is it? In comparison catless dp's to catless dp's with vrsf exhaust??? Any gains?
Worth the money?
Thanks! It's def worth the money and I love mine. The volume and tone are literally perfect in my opinion. I am, however, going to be putting mine up for sale soon. My problem is it hangs too far for how low my car is, and the tips in the back are too small for my liking. Here's a video I did showing how the exhaust sounds

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      10-02-2013, 06:23 PM   #27
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Thanks! It's def worth the money and I love mine. The volume and tone are literally perfect in my opinion. I am, however, going to be putting mine up for sale soon. My problem is it hangs too far for how low my car is, and the tips in the back are too small for my liking. Here's a video I did showing how the exhaust sounds


what about the difference between catless dp's vs catless dp's+vrsf catback???
The video can't say the whole story.
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      10-02-2013, 06:35 PM   #28
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what about the difference between catless dp's vs catless dp's+vrsf catback???
The video can't say the whole story.
This vid might help. This was my car prior with catless downpipes and a secondary cat delete on the stock exhaust.

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      10-02-2013, 06:41 PM   #29
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I'm surprised the power drops offs in the higher rpms. is that common n42 turbo engines?
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      10-02-2013, 06:44 PM   #30
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I'm surprised the power drops offs in the higher rpms. is that common n42 turbo engines?
This is not indicative of a normal power curve. Yes on stock turbos the car will drop off power after 6k, however, not this badly. The car kept putting itself into map 4 due to too much E85 and also wasn't hitting target boost towards redline.
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      10-02-2013, 06:44 PM   #31
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This vid might help. This was my car prior with catless downpipes and a secondary cat delete on the stock exhaust.

Thanks for the vid, it seems that secondary cats delete is louder than vrsf catback???
What about drone in the car with secs delete?
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      10-02-2013, 07:17 PM   #32
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Thanks for the vid, it seems that secondary cats delete is louder than vrsf catback???
What about drone in the car with secs delete?
Not from my ears... Definitely different tone though. No drone with secondary cat delete
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      10-03-2013, 06:01 AM   #33
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Not from my ears... Definitely different tone though. No drone with secondary cat delete
No drone???!!! Have you been using vibrant resonators???
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      10-03-2013, 08:23 AM   #34
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Not from my ears... Definitely different tone though. No drone with secondary cat delete
No drone???!!! Have you been using vibrant resonators???
Nope just left the e90 resonator. The vrsf drones a bit but so will any aftermarket setup
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      10-03-2013, 09:50 AM   #35
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Nope just left the e90 resonator. The vrsf drones a bit but so will any aftermarket setup
So as far as i get you, mine will drone as i'm e92?
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      10-03-2013, 10:16 AM   #36
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Quote:
Originally Posted by rightaway View Post
I'm surprised the power drops offs in the higher rpms. is that common n42 turbo engines?
This is not indicative of a normal power curve. Yes on stock turbos the car will drop off power after 6k, however, not this badly. The car kept putting itself into map 4 due to too much E85 and also wasn't hitting target boost towards redline.
That's the first thing I've noticed, how come the power goes down around 5000-5200 RPM. Also I'm aware that the power will drop off after 6000 RPM on stock turbos but not as much as we can see on the dyno sheet. But yeah, psmitty95's answer does make sense. That makes me wondering what would be the numbers if he was hitting target boost all the way to redline...
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      10-03-2013, 02:13 PM   #37
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So as far as i get you, mine will drone as i'm e92?
No idea since i've never been in an e92 secondary cat delete

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That's the first thing I've noticed, how come the power goes down around 5000-5200 RPM. Also I'm aware that the power will drop off after 6000 RPM on stock turbos but not as much as we can see on the dyno sheet. But yeah, psmitty95's answer does make sense. That makes me wondering what would be the numbers if he was hitting target boost all the way to redline...
Yea it would be interesting to see what number I would hit if all was working well. Peak might not be that much higher since the car makes its power mid range but who knows. Hopefully by my next dyno in a few weeks on a dynojet everything will be 100%
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