[YoungBlood]

Originally Posted by 335togo

07 335....203k on my stock turbo FBO N54 maybe just lucky but also have 2011 N55 FBO....cute but can't hold old guys jock strap if you know what I mean

How is power delivery between the two? I haven't driven in a modded N55. I have access to e85, but prefer 91 for the most part, because I commute a lot. How much power is a full bolt on N55 making on 91? I really like the updated coupe body style, and in xi it would be a very nice car imo. They're a bit cheaper than S4's, which was my other vehicle I considered

[Turbod]

Originally Posted by YoungBlood

How is power delivery between the two? I haven't driven in a modded N55. I have access to e85, but prefer 91 for the most part, because I commute a lot. How much power is a full bolt on N55 making on 91? I really like the updated coupe body style, and in xi it would be a very nice car imo. They're a bit cheaper than S4's, which was my other vehicle I considered

I would guess power would be around 320 - 335whp on 91 with the stock turbo. Torque would be higher though probably around 400 wtq.

[YoungBlood]

Hmm not quite what I'd want, after being fbo e85 N54 for quite a while, that's like going back to stage 1 haha. Maybe I'll have to look a bit harder at S4's. They're not making a ton more power than N55's, but I like the driving experience a lot more

[Turbod]

Originally Posted by YoungBlood

Hmm not quite what I'd want, after being fbo e85 N54 for quite a while, that's like going back to stage 1 haha. Maybe I'll have to look a bit harder at S4's. They're not making a ton more power than N55's, but I like the driving experience a lot more

Originally Posted by Turbod

I don't have any dyno figures so I cannot say what it would make. This is a 92 octane custom pump tune I had done for me. 18 psi with about 3.5 degrees of timing. We have cleaned up the rich tip in since then. This is the tune I ran 12.6 @112mph.

http://www.datazap.me/u/turbod/92-oc....18&tmax=14.59

Just an estimator

Pulled from another thread. Upgrading the turbo helps out.

[Maniac0908]

07 335xi, fbo except turbos, tuned 500hp daily no issues except for the main things like water pump.

[ShaneN55]

Originally Posted by Turbod

I would guess power would be around 320 - 335whp on 91 with the stock turbo. Torque would be higher though probably around 400 wtq.

I had heard most people say FBO was around 360-380WHP? I'd assume these numbers with tune and e85 though.

[Fundguy1]

N55 is less modifiable and similar to maintain. Slower, rear tire wells smaller, ugly front, nice lights and rear. That's about the only real differences. N55 has a bit more pull from 0 mph, n54 wins at 30 mph+.

[Fundguy1]

Originally Posted by YoungBlood

Yeah, I have a dedicated winter setup, but coming from a G37x, the 335i sucks hard in the snow. We get dumped on where I live, and I regularly spend 30+ minutes digging my car out, to be able to even make it out of the driveway on days when it's bad. Perks of living halfway up a mountain in Utah...

Are you saying X-drive is less reliable? just more things to break with Awd?

X drive has more things to break, heavier, slower, but also can't take mods past 450ish hp without detonating the transfer case.

[BLKSAPPE92]

I'm a bit confused why some cars need the walnut blasting and some don't? I took my car in at 90,000mi that was about 7k ago and was told by my shop that they ran a bore scope and vehicle does not need walnut blasting. Yes they were shocked and no it's never been done I've had the car since 15,000mi.

09 335i e92 97,700mi
Vehicle always driven spirited never babied

Oil Mobile 1 0w40 Mann Hummel filter every 7,500mi
Tires done every 10,000/15,000rear 20,000/25,000front with 19" Pirelli PZero RFT except 1yr about 40k put Michelin pss on car hated sloppy bouncy feel at freeway speeds and above went back to PZero RFT alignment always checked and done if needed.


Repairs/ some my problems over life of car so far

*Hpfp 20,000 warranty never failed just replaced
*Transmission 20,000 4th gear defective syncro gear would grind going from 2nd to 4th only noticed if I skipped 3rd gear to go right to crusing rpm when I was at speed but dealer replaced anyway
*Spark plugs dealer 40,000 and myself 80,000 reg maintenance
*oil filter housing 50,000 warranty
* turbos replaced at 50,000 warranty
*high pressure fuel injection exchange pump 68,000mi busted rubber diaphragm in pump made a sound like valves ticking when vehicle was cold and once in awhile when stopped somewhere and vehicle went down to idle.
*Injectors 68,000 warranty intake bore scoped
*Water pump Tstat 80,000 replaced myself next day when bearing made noise after shutting off car
*fluids 80,000 did myself
* tires alignment 90,000 Pzero RFT asked dealer about walnut blasting again dealer bore scoped not needed.
* shocks struts(bilstien b8 perf plus) springs (dinan) m control arms (TRW) alignment 95,000mi did myself

Future repairs/maintenance next 10,000mi 15,000mi unless parts fail.

*valve cover gasket wet will replace valve cover along with gasket myself
*acc belt and tensioner myself
*blower motor, oiled shaft and bearing myself took 15min fixed noise and corrosion issue but will need to replace eventually myself

[Fundguy1]

The n54 spits more oil into the intake and it goobers the valves. An oil catch can may allocate this some. A fuel rail eliminates it. N55 doesnt have this issue. It should be done every 30-40k. If you have an n54 I don't know why you don't have this issue. A 2009 e92 should be n54.

[Turbod]

Originally Posted by ShaneN55

I had heard most people say FBO was around 360-380WHP? I'd assume these numbers with tune and e85 though.

Yeah with the early E series I would say 390whp is pretty close to the max you can get out of the stock turbo. These engines are not low compression to start with and when you start adding more boost you're a lot more prone to detonation. This means octane plays a pretty big role in what you can get power wise. BMW says not to run less than 91 on the 7 psi tune. When I look at a lot of the stage 1 or map 1 tunes out there timing is very low to avoid detonation. When you add race fuel, ethanol, or methanol you will see a decent power increase.

[Fundguy1]

Originally Posted by Turbod

Yeah with the early E series I would say 390whp is pretty close to the max you can get out of the stock turbo. These engines are not low compression to start with and when you start adding more boost you're a lot more prone to detonation. This means octane plays a pretty big role in what you can get power wise. BMW says not to run less than 91 on the 7 psi tune. When I look at a lot of the stage 1 or map 1 tunes out there timing is very low to avoid detonation. When you add race fuel, ethanol, or methanol you will see a decent power increase.

Wrong. People have hit 500 rwhp on stick turbos. FBO on pump 450 rwhp is attainable but 425 is typical. 390 is just a tune and catless downpipes.

[Turbod]

Originally Posted by Fundguy1

Wrong. People have hit 500 rwhp on stick turbos. FBO on pump 450 rwhp is attainable but 425 is typical. 390 is just a tune and catless downpipes.

Your opinion holds no value to me. If you want to quote N54 numbers then go to the N54 section. OP asked about N55 on 91 octane, I told him around where he should land. I then explained the upper limits of the N55 on the stock turbo.

[Fundguy1]

Originally Posted by Turbod

Your opinion holds no value to me. If you want to quote N54 numbers then go to the N54 section. OP asked about N55 on 91 octane, I told him around where he should land. I then explained the upper limits of the N55 on the stock turbo.

Oh n55? Ok. N54 is my numbers. OP wanted to know the differences between n54 and n55, not just about n55. These numbers are why most want n54 over n55.

[Mikaeldarer]

Originally Posted by Fundguy1

Wrong. People have hit 500 rwhp on stick turbos. FBO on pump 450 rwhp is attainable but 425 is typical. 390 is just a tune and catless downpipes.

Wrong. I just did a quick google image search and could not find ONE graph of a FBO stock turbo's N54 making much more than 400 on pump. Also, didn't see any at 500... the graphs with added fueling(pi, ethanol, meth) were all around 450. With inlets/outlets maybe 470

[Fundguy1]

n54mat 06:41 AM 12-08-2016
453.3hp and 463.2ft-lbs on 93 mhd custom flash

Mhd tune,
dci + stock location inlets,
catless downpipes,
charge pipe,
forge diverter valves,
ebay intercooler

[Fundguy1]

NEW* STock Turbo World Record, 500rwhp 540rwtq!!! - 04-03-2015, 01:25 PM


New stock turbo World Record
Well got it done today as promised with Terry helping me dyno tune. 80F rainy and muggy outside, plenty of humidity, and it didn't matter, got the new WR thanks to the MMP turbo intakes! Will post more data later but here is the dyno picture

power mods:
MMP turbo intakes
JB4 custom tuning backend and user settings
fuel it stage 2 LPFP
dual meth injection
*** without cats
Big Tom intercooler
TFT charge pipe
custom 3" intercooler up pipe
NGK .022" gapped spark plugs

fuel:
straight E85

run 21 is 4th gear, run 23 is 5th gear.

oh and this is on a 6AT with 3% more drivetrain loss than MT. Adjusted for MT drivetrain loss, this would be 512whp

[Fundguy1]

Took me 2 min to find these. You were saying? I've been here for 9 years and owned the car since stock. Mine makes 675 rwhp. I think I might know. Heck I have a couple buddies well into the 400s on pump. It's not hard. Guessing Mikaeldarerthst you have an N55? Sorry.

[YoungBlood]

I have an n54 so know they make more power but I also want reliability, awd, and the LCI body style

[Fundguy1]

Originally Posted by YoungBlood

I have an n54 so know they make more power but I also want reliability, awd, and the LCI body style

Ok, reliability will be marginally better. Rest is preference. If you don't care about making north of 400 rwhp sure, go get one.

[Fundguy1]

I did lci tails, bump, 1m front bump, halos. Pretty much covers lci looks etc. Reliability on both is close and more dependant on maintainence, mileage, mods, and age than model engine. But regardless, you can't add awd nor make an n54 younger.

[Mikaeldarer]

Originally Posted by Fundguy1

Took me 2 min to find these. You were saying? I've been here for 9 years and owned the car since stock. Mine makes 675 rwhp. I think I might know. Heck I have a couple buddies well into the 400s on pump. It's not hard. Guessing Mikaeldarerthst you have an N55? Sorry.

I hope that made your saturday night lol. I do have an N55, why are you sorry? With Pure Stage 1 and e30 blend I am over 400 whp...

There are stock turbo n55's in the 400's: https://www.youtube.com/watch?time_c...&v=PN0zqw2f88w