[reeltime]

Hey guys, so I have searched, but i wanted some more direct answers.

I recently sold my FBO N54 e92 335xi and was hoping to find an MY2009-2010 N54 e93 but they're not easy to come by. I started looking into N55 e93s and was just wondering the potential the engine has compared to the N54. Obviously I know it won't make as much power as the N54 but what are the numbers for a FBO N55?

I figured i'd post in the N55 section because you guys are probably more knowledgable on the N55 platform.

Thanks in advance guys

[pwr hungry]

Try posting this in the section you said you posted it in...

[reeltime]

Originally Posted by pwr hungry

Try posting this in the section you said you posted it in...

lol my bad, i thought i was in the N55 section.

Mods if you can close this, i'll repost it in the N55 section, thanks!

[Ilove2dubb]

[The Ghost]

I'll answer anyway. You should just wait and get the car you want. The N54 is SIGNIFICANTLY more powerful when maxed-out. It also has readily available aftermarket turbo options.

I flew across the country to get my second 335i and it was worth the wait/search.

[reeltime]

Originally Posted by The Ghost

I'll answer anyway. You should just wait and get the car you want. The N54 is SIGNIFICANTLY more powerful when maxed-out. It also has readily available aftermarket turbo options.

I flew across the country to get my second 335i and it was worth the wait/search.

I mean yeah but not with every option I want. Some have certain options and some don't. I've come to the conclusion that if I want a car before the summer I'm gonna have to switch over to the N55. Some of N55s are pushing almost 400whp which is perfect for me. My FBO N54 xi was only making about 350-370awhp so anything in that area is good

[The Ghost]

Originally Posted by e92driva

I mean yeah but not with every option I want. Some have certain options and some don't. I've come to the conclusion that if I want a car before the summer I'm gonna have to switch over to the N55. Some of N55s are pushing almost 400whp which is perfect for me. My FBO N54 xi was only making about 350-370awhp so anything in that area is good

You just have to be patient and look every day (auto trader, all forums, craigslist, etc.). It took me about 3 months to find just want I wanted (white, 6MT - HARD to find, e92, Nav, and got lucky with MSport). Your car is out there.

[nikitino25]

Originally Posted by The Ghost

I'll answer anyway. You should just wait and get the car you want. The N54 is SIGNIFICANTLY more powerful when maxed-out. It also has readily available aftermarket turbo options.

I flew across the country to get my second 335i and it was worth the wait/search.

I flew across the country also to get my first and only used '07 n54 335i (from an early forum member with 38k miles) right before the n55 came out I believe. Since then I've always heard that the n54 engine is or can be more powerful than the n55 but have always wondered why that is? What makes the n54 "better" than the n55? For one thing it seems like the n55 would be easier, simpler, and cheaper to upgrade to a bigger single turbo since it's based on a single turbo setup to begin with.....why is that not the case? What's the reason that bmw used the n54 in the 1Mcoupe and 335is over the n55 when they had the choice; n54 just better stock I guess?

[Tiny Chainsaw]

Originally Posted by nikitino25

I flew across the country also to get my first and only used '07 n54 335i (from an early forum member with 38k miles) right before the n55 came out I believe. Since then I've always heard that the n54 engine is or can be more powerful than the n55 but have always wondered why that is? What makes the n54 "better" than the n55? For one thing it seems like the n55 would be easier, simpler, and cheaper to upgrade to a bigger single turbo since it's based on a single turbo setup to begin with.....why is that not the case? What's the reason that bmw used the n54 in the 1Mcoupe and 335is over the n55 when they had the choice; n54 just better stock I guess?

Simple answer

Twin turbo > single turbo

Of course there are many other factors, but that's the main one.

[nikitino25]

Originally Posted by Tiny Chainsaw

Simple answer

Twin turbo > single turbo

Of course there are many other factors, but that's the main one.

Why are people throwing single turbos onto n54's then?

[Allen@MOTIV]

Originally Posted by nikitino25

Why are people throwing single turbos onto n54's then?

The factory twins on the N54 are capable of moving a decent amount of air where the factory single used by the N55 just isn't capable of matching that flow. Going with an aftermarket single kit means using a properly sized turbo to not just make good power but spool quickly.

[nitehawk]

Originally Posted by nikitino25

I flew across the country also to get my first and only used '07 n54 335i (from an early forum member with 38k miles) right before the n55 came out I believe. Since then I've always heard that the n54 engine is or can be more powerful than the n55 but have always wondered why that is? What makes the n54 "better" than the n55? For one thing it seems like the n55 would be easier, simpler, and cheaper to upgrade to a bigger single turbo since it's based on a single turbo setup to begin with.....why is that not the case? What's the reason that bmw used the n54 in the 1Mcoupe and 335is over the n55 when they had the choice; n54 just better stock I guess?

One reason is the valvetronic system. The N55 does not use a throttle body, but rather uses valve lift to control air flow. I think it is better for emissions (hence no secondary cat ) but not so much for max performance. It is also more difficult to tune around.

[nitehawk]

Also all m cars up to now (minus the f8x m3) have never had valvetronic. I think the new M will not nearly be as easy to tune and its stock turbos are already near their limit