Trying to keep things brief and it backfired.I don't want to start a war, but I did want to just share my experience after doing a ton of research on these two engines and the disconnect between what I read and what I felt this weekend during several test-drives. ^ LOL, I tried to include as many disclaimers as I could, but you may be right.

The N54 is loads better..(FBO) Cobb Stage 2+, AR Downpipes, Injen DCI, AA (Sport) FMIC, ER Chargepipe/Synapse BOV, Carbon fiber bits and Breyton GTS-R Wheels. I don't really feel much if any lag at all either due to the motor or the DCT. More reliable..more tunable..more safer? I am not aware of any delay on my 135is with DCT. What Shiv said was that a 340-350hp n55 with dct was equal to a 370/380hp 6 speed n54.What Shiv said was that a 340-350hp n55 with dct was equal to a 370/380hp 6 speed n54. BMW E90 335i N54 Fuel Injector DIY and Coding - Duration: 47:09. non-speculation:Thats purely speculation on your part unless of course you can provide BMW documentation stating the same. Thank you for your thoughtful and considered reply. Owned an '08 N54 135i with the Steptronic and currently own an '11 N55 135i with the DCT. Also, most n54's have been beat to shit, there are still a lot of low mile N55 or N55 driven by older people and not 20 something year olds who ragged on their car 24/7. But lets not get too much in to this and lets close this thread. The low torque feels great Esp when you add a tune such as the jb3.
Gumbal 174,796 views. And agreed, the N55 DEFINITELY sounded a lot cooler. BMW must also feel it has an edge hence Many reviewers after having driven BMW's with both engines feel the N54 is a better performing powerplant. NIet voor niks dat de 1M een aangepaste N54 blok heeft en NIET de n55! The '11 is not totally stock now but was when I bought it. if it makes you feel better, we can say that though And the DCT is very good in sport or manual mode, shifting very quickly. i highly doubt a tune only dct could keep up with a 450 whp fully modded n54. Edit: Another thing is fbo n55 makes about 400ish whp vs 440whp on n54. I was very lucky. The N54 had a recall for the pump?...And yeah. A lot of cars at dealerships just sit.

The lag is from the DCT not the engine.Not even remotely! The N55 had a, IMHO, better exhaust note both pre and post PPK1. Both cars I own(ed) have manual transmissions. I forgot to mention that, glad you reminded me! I really wanted a 2009 135 convertible. Here's my take on differences: Performance, reliability, and tune-ability comparison of the S55 and S58 engines featured in the newer M-series models. This is exactly my evaluation N54 vs. N55 and I had DCT in my former '12 135i and now on the 2016 Z4. But I think either of these cars are a total blast with a stick.Had both an '08 135i w/ N54 and now a '13 135i w/ N55 - the folks here have got it right on the money. They are very, very different. 5:41. And it had to be auto (wife can't drive a stick). Yes, the DCT is fantastic (and 7th gear is nice for fwy cruising). Then by pure dumb luck find the car I currently have on a Toyota used car lot. N54 uses a throttle body, on the N55 all throttle control is done by the Valvetronic system at the valves, so no throttle body. Many reviewers after having driven BMW's with both engines feel the N54 is a better performing powerplant.

Only difference I really noticed was the DCT shifted faster and the N55 sounded better.

BMW 335i E92 N55 - Brutal Accelerations, Burnout & Backfire Sound! I'm wondering if most of these cars needed their ECUs to adjust.

N54 --- Wastegate rattle en Benzinepomp problemen extremely goed te tunen N55--- Bovengenoemde problemen zo goed als geholpen maar niet zo goed te tunen als de N54 De N54 blok is gewoon een beest!Stukken robuster en de 2x turbos zijn wicked! The N54 was put in the 335i until BMW made what's believed to be a more cost-effective engine, the N55. FBO E30 BM3 OTS PWG F30 vs. FBO MHD Stage 2+ 93 Octane N54 35 and 20 roll.

You tried them for yourself and made the decision that suits you best, and nobody can tell you what that is but you. I dont understand.. Found a coupe in Houston, drove down to buy it, that fell through. Whats the better motor? Gave up. 3:43. This also means two vacuum pumps inside the valve train.

More reliable..more tunable..more safer? N54 or n55I dont understand.. That's a bit of an exaggeration there shockin, but to put it simply: - Duration: 5:41. )0 treatment. Whats the better motor? Many reviewers after having driven BMW's with both engines feel the N54 is a better performing powerplant. Everyone has different experiences and priorities, but the key is that you did the smart thing. If you do not plan to make it a 450 hp monstor I would go with the new n55.. BMW must also feel it has an edge hence "While the face-lifted 2011 BMW 335i coupes will be offered with the N55, the N54 will be retained in the higher-performing 335is". I don't want to start a war, but I did want to just share my experience after doing a ton of research on these two engines and the disconnect between what I read and what I felt this weekend during several test-drives. N54 or n55 I think the DCT is much more enjoyable to drive (after the 12-15-14 (?