The BMW N54 is a twin-turbocharged straight-six petrol engine that was produced from to The final model powered by the N54 is the E89 Z4 roadster, which was produced until The N54 was produced alongside the naturally aspirated BMW N53 engine; both engines have direct injectiondouble-VANOS variable valve timingan open-deck engine block   and an electric water pump. Turbocharging is a key difference between the N54 and BMW's previous straight-six engines.
The N54 has two small low-pressure turbochargers to minimise turbo lag. BMW's marketed the twin-turbo as "TwinPower Turbo",  although the term has since been used for engines which have a single twin-scroll turbocharger. Its N55 successor uses solenoid -type injectors, because the piezo injectors are more expensive and not reaching their full potential to obtain the "lean burn" benefit. All versions have a bore of Applications:  .
A variant of the N54B30 with higher peak power and torque is used in the i  and E92 is. Applications:   . Applications:  . Biturbo engine by Alpina based on the N54B30, with upgrades including the engine control unitoil cooler and pistons. Comparing the Nengined E60 i with the i using a 4. Failure of the HPFP can cause the engine to suddenly stop functioning, which has caused several near-misses on highways.
On some cars, the HPFP was replaced multiple times without resolving the issue, potentially leading to the car being refunded under the Lemon Laws in some states. From Wikipedia, the free encyclopedia. Retrieved 17 August Retrieved 8 December Retrieved 10 December Archived from the original on 10 March Retrieved 5 January Retrieved 16 December Archived from the original PDF on 20 September Archived from the original on 16 September Archived from the original on 21 September Retrieved 18 November Forums New posts.
I have a noob question, how do you determine when to stop cutting? Just a quick update: we're waiting on final polishing of the intake and exhaust ports a bit of bowl cleanup back of valve tulips smoothed and polished. An N54 fixture is being fabricated as well so this can hit the superflow bench. Gee looks like the local shop has all kinds of V8 fixtures but no N There's a bit of vacation time in between all this so we're probably a few weeks out. We're waiting with baited breathe for the wrap-up work, get the head assembled and on the flow bench.
Stay tuned! May 23, What work was done to the ports and the divider, especially on the exhaust side? Oct 22, I don't see how increasing valve lift impacts high rpms, this statement is incorrect. If the head flow data shows that an extra 1mm valve lift improves flow, than design a cam profile or a rocker ratio that gives that extra 1mm lift to the valve, being intake or exhaust valve it does not matter.
The duration statement is also misleading.Remember Me? Here is what the car looked like when I first bought it:. Attached Images.
Appreciate 0. My first mod to the car was the addition of a set of gloss black BMW Performance grilles. I never could understand why BMW chose to equip this car with chrome grilles as standard, especially considering that it was optioned with Shadowline trim with no brightwork anywhere. My next mod shortly thereafter was the addition of a pair of VRSF 3" downpipes. After week or so I decided it was time for more oomph, so out comes the BT cable, and in goes a custom tune:.
Appreciate 1. I now had a peak of 16psi tapering to 12psi, and probably gained in the region of whp in just a few minutes. Performance was hugely improved, but the added oomph really brought out the deficiencies in both the chassis and the 6AT during high performance drivingso a 6MT swap soon became my 1 priority.
So I ended up doing the 6MT swap only a few short weeks after first buying the car, but not before doing giving the 6AT its last hurrah, in 2nd gear with 4 people in the car no less Last edited by hydra; at PM.
Car is really ill-suited to this kind of power level as-is, and it became clear that much work had to be done to make this car "fun", and to help it put its power down more effectively. On to the next round of mods Car now tracks straight and true WOT in 3rd and 4th gear, whereas before it would wander all over the place and fight for traction even with fresh Neova AD08Rs. Here is a pic below from that weekend:. Last edited by hydra; at AM. Nice build! Was the M3 steering rack a direct PnP?
I heard there was some coding involved due to the incompatibility of the Servotronic, or something? SoCal 1x2 addicts FB Group. Find More Posts by hihnry. With all this talk of performance and handling, I seem to have neglected the subject of aesthetics. The standard i is a bit of an ugly duckling IMHO, so I decided to imbue it with some much-needed attitude Originally Posted by lecaf.Original Poster.
Search My Stuff What's New 3 12 24 N53 - are the risks as great as they seem? I know a BMW warranty will cover it all of it??? We had a new Ci no idea what N number the engine was.
Got it new September ran it till November k in that time, never had a new car so unreliable!! It spent lots of time back for warranty work, warning lights would come on and you would be in limp mode call into nearest BM garage and when they put the key in the machine nope nothing wrong with your car!!!
This happened on several occassions and my wife lost confidence in the car. It had several sets of injectors,coil packs, 2 fuel pumps and numerous other parts. Oh and when The car from day one had a hesitant missfire when sitting at constant motorway speed that they never cured. It was in several different garages and lots of complaints to BM head office.
Tyre pressure monitor warning would come on giving false alarm in all but one instance! Having said that the car was a great drive, it did lots of Col roads in the Alps and over the k averaged 33mpg not on the onboard computer the actual worked out MPG cruising down to the Alps at!
Miss the car not the hassle! Thanks Neil Anyone else comment? Anyone had one without problems? Other thought is a d, but while it's quick enough the engine is 'easy but not exciting' Not necessarily a bad thing, just not what I'm used to and not what inspires me in a car.
Simon BB posts months. Well, I've got a i, 81k miles and fingers crossed it's never missed a beat famous last words! Petrol in one end, servicing at the other and one of the smoothest and quietest drives there is in between. She'll also lift her skirt and play ball when called upon showing many a boy racer a clean pair of heels. The car returns roughly mpg and as a daily driver is a lovely smooth ointment at the end of many a crap working day.
I love it. Not sure this is much help I will be but I was in a similar position to you last month, do I find an N52 or N53 engine.
N53 head ported & converted for use on my N54
Say the above, my grandmother has a i from and it has been great so far however it has only done 8, mile since new.
I guess you take a chance with any car but for me, I would rather stick some more fuel in the tank and have a tried and tested engine… We will only to 7K a year so no need for a diesel. Thanks both. Bracken, I'm of the same mind as you but work car allowance specifies under 5yo, so I've almost no chance of finding an i N52 manual Touring! Fox- 13, posts months. It seems as the economy increases so to does the level of complexity required Edited by Fox- on Friday 22 June NoelWatson 11, posts months.
First Prev 4 of 5 Go to page. Staff member. Aug 11, 2, Virginia. A few more videos from this evening.
Polishing and valve work remains. Last edited: Aug 1, Oct 18, 8, AZ. Looks good. I have a noob question, how do you determine when to stop cutting? Just a quick update: we're waiting on final polishing of the intake and exhaust ports a bit of bowl cleanup back of valve tulips smoothed and polished.
An N54 fixture is being fabricated as well so this can hit the superflow bench. Gee looks like the local shop has all kinds of V8 fixtures but no N There's a bit of vacation time in between all this so we're probably a few weeks out. We're waiting with baited breathe for the wrap-up work, get the head assembled and on the flow bench. Stay tuned!
May 23, What work was done to the ports and the divider, especially on the exhaust side? Oct 22, I don't see how increasing valve lift impacts high rpms, this statement is incorrect.User Name. Log in. Remember Me? They put together this technical video on the N54 and N52 blocks before officially coming on board and it is well worth your time. Sacai -PM. I wonder how the bigger bore of the n52 cylinder head would fit on the smaller bore of the n54 cylinders.
Would the n54 cylinders have to be bored out to make this work? Ericbh77 -PM. A lot harder than it looks.
Sticky -AM. BPCMotorsports would like to hear more about if you got that N52 head to work with the N54 block or if you just test fit it to see if it would physically line up. Test Fit, We were doing all this because of our Turbo N52 build that is now a full blown race car. Would enjoy reading that for sure! In theory you could make a stroked N52 Hybrid? Sticky -PM. Originally Posted by e92revolution. Originally Posted by Sticky. Originally Posted by maxnix.
Threads like this with overlap do a good job highlighting how the new prefix system works. Before, this would have been buried in the N52 section or you would need two threads in two forum for the same topic. This thread was quite a bit old and never showed any gains from the N52 head on the N THe N52 is also port injection only right?
Seems hydra is on a better track but more labor and part involvement using the DI N53 head on the N Cancel Changes. Quick Membership.BMW E90 E92 E93 325I 330I N53 N54 CHECKING INJECTORS FOR LEAK
Boost brought to you by:. Popular articles.User Name. Log in. Remember Me? The N54 head is not BMW's best work.
The 4 Most Common Problems with BMW’s N53 Engine
It did not need to be to hit their goals. People forget this is not an M motor and BMW did not create a high revver or top end monster with the N The good part of that is you can pick up nice gains on the N54 head in the aftermarket. Good stuff. What is needed to use N53 head on N54 block? Originally Posted by 93siro. So to summarize, if you are not going for trophy numbers, for a N54 built block, modify the N54 head? For street only, perhaps? Torgus -PM.
Originally Posted by maxnix. JBacon -PM. Would be nice when trying to make as much as possible on pump gas since you won't have to run as much boost to make the power. Sticky2 -PM. Originally Posted by JBacon I wouldn't say overlooked, but rather that the value in this platform is only truly realized with ethanol. Torgus -AM. JBacon -AM. It would be equally beneficial on a single turbo setup as it is on a twin setup. Maybe even more so.
Not everyone has access to ethanol, and race gas ain't exactly cheap. It's a really nice upgrade. I'd love to do it but I won't be able to justify the cost.
I already have GC turbos and I often run them at 21 psi on the street. Sometimes up to 25 psi. I have run 27 psi a couple of times but at the time that was about the limits of my fuel supply. They can probably do 30 psi but I feel like that's in a bit of a danger territory with the car. Detonation, cracked cylinder liners. Head lift.