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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Vishnu Procede n55 dyno with prototype FMIC (360+WHP)



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      04-19-2011, 01:45 PM   #23
makarov88
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Quote:
Originally Posted by shiv@vishnu View Post
Yes that's where the n55 seems to have a sizeable advantage. Power power at a lower boost pressure all things equal. Suggests that the head flows better (less boost accumulated at the manifold). There is also far less pumping loss during non-WOT conditions (no manifold vacuum) which means smoother engine performance. And you can feel it. Especially during transitions from partial to full load. I can't wait to see what this engine will do with an upgraded single turbo. Wouldn't be surprised if it made 450whp at just 15psi from GT30R or something comparable.
Hearing this from Shiv makes me warm inside
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      04-19-2011, 01:57 PM   #24
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Sure but keep in mind putting a big single on n55 is no easier than with the n54 Same space constraints..
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      04-19-2011, 02:04 PM   #25
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Quote:
Originally Posted by dzenno View Post
Sure but keep in mind putting a big single on n55 is no easier than with the n54 Same space constraints..
Space constraints- yes...manifold issues- yes, but please remember this thing was designed for a single turbo resolving a few issues with one is a lot easier than 2, this type of upgrade would be much easier than the single we (never) saw on the N54...
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      04-19-2011, 02:08 PM   #26
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Quote:
Originally Posted by Questforpower View Post
Space constraints- yes...manifold issues- yes, but please remember this thing was designed for a single turbo resolving a few issues with one is a lot easier than 2, this type of upgrade would be much easier than the single we (never) saw on the N54...
Going from 2 to 1 is always easier than 1 to 2, not that anyone is going from a single to a twin but you get my point...also, i don't see how it can be ANY easier to tune the N55 for a big turbo vs the N54...actually, with valvetronic on the N55 its actually WAY harder...
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      04-19-2011, 02:14 PM   #27
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Quote:
Originally Posted by dzenno View Post
Going from 2 to 1 is always easier than 1 to 2, not that anyone is going from a single to a twin but you get my point...also, i don't see how it can be ANY easier to tune the N55 for a big turbo vs the N54...actually, with valvetronic on the N55 its actually WAY harder...
What lol? Who would ever go from 1 to 2? I am only referring to mechanical install possibly being easier due to the need for less parts, tuning is another issue... but just to ask; since when has Valvetronic been a limitation to tuning? I see 360 WHP here with better throttle response and this is only because the stock turbo sucks and look at the tq numbers you are getting at that PSI from that little beast...
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      04-19-2011, 02:18 PM   #28
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Quote:
Originally Posted by Questforpower View Post
What lol? Who would ever go from 1 to 2? I am only referring to mechanical install possibly being easier due to the need for less parts, tuning is another issue... but just to ask; since when has Valvetronic been a limitation to tuning? I see 360 WHP here with better throttle response and this is only because the stock turbo sucks and look at the tq numbers you are getting at that PSI from that little beast...
Plenty have gone from none to twin anyhow, no point arguing that as I said the same thing in my post, was speaking only hypothetically...

There are/will be more issues tuning the N55 due to valvetronic than the N54 without it...maybe ask Shiv or do a bit of your own research...
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      04-19-2011, 02:29 PM   #29
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I dont see how you can compare two different turbo set ups and say one engine is better because of the power it makes downlow. You can very well say that 15psi on a n55 up top is lower then 15psi on a n54 up top. Does that mean the n54 is better? No, it means the turbos flow better up top. Slam a fully bolted n54 with 15-16 psi at 3k and you will make over 400wtq just as easy.
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      04-19-2011, 02:29 PM   #30
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Good Stuff!!!!
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      04-19-2011, 02:33 PM   #31
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confusing!!!!!!!!!
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USED TO HAVE A 385 whp 479 tq N55 335 2011 (AT) AND NOW A 135 M package 2010 (AT) 447whp/504tq
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      04-19-2011, 04:19 PM   #32
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Quote:
Originally Posted by Clap135 View Post
I dont see how you can compare two different turbo set ups and say one engine is better because of the power it makes downlow. You can very well say that 15psi on a n55 up top is lower then 15psi on a n54 up top. Does that mean the n54 is better? No, it means the turbos flow better up top. Slam a fully bolted n54 with 15-16 psi at 3k and you will make over 400wtq just as easy.
The n55 doesn't need full bolt ons to make 400trq. It does this with no intake, no fmic and no charge pipe.
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      04-19-2011, 04:33 PM   #33
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N55 > N54... nothing to see here, move along
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      04-19-2011, 04:35 PM   #34
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When the N55 on stock turbo breaks 125+ traps, then we'll talk.

Guys have done 120-125 traps stock turbo N54 no nitrous.
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      04-19-2011, 04:40 PM   #35
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Quote:
Originally Posted by e92sport View Post
The n55 doesn't need full bolt ons to make 400trq. It does this with no intake, no fmic and no charge pipe.
Intake wont gain power downlow
FMIC wont gain power down low
Charge pipe won't do squat

Maybe I missed your point?
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      04-19-2011, 04:50 PM   #36
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May is track season .... Lets let the track do the talking..
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      04-19-2011, 05:02 PM   #37
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May is track season .... Lets let the track do the talking..
www.dragtimes.com
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      04-19-2011, 05:37 PM   #38
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I dunno, add a proper meth kit with race gas for this bad boy and some slicks to launch it right...


who knows? 120 MPH maybe?

Whoever does it, don't do it under any circumstance at SAC, the results are always sketch.

114-115 has been trapped before consistently on a proper track without meth and half these parts weren't even available yet. Somebody do this with a manual tranny so as to not blame everything on a fast yet un-launchable DCT.
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