300+whp~Supercharged 128i ?

[jbenington86]

Originally Posted by gtaday51

Is it when you said the 135i has a slightly larger engine?

ur on point

n52=2996 cc/182 in³
n54=2979 cc/181 in³

so technically the other way around

[italiantank26]

just exactly how would you tune a 128 engine to have 300 hp

[jksgoh]

there were a few discussions on the diff between the 190/200kw engines and the 160kw engines. most people seemed to think it was largely due to the differences in the intake manifold and an ecu change? but nothing was ever verified of course...

[jbenington86]

Originally Posted by italiantank26

just exactly how would you tune a 128 engine to have 300 hp

well i believe you would have to goto germany and find out... that is the only place they sell the n52 that comes stock with 272hp... it is on the european 330i, 330ci, x3 3.0si, and x5 3.0si... im guessing it is not available in the states due to emissions regulations in some states... and im sure they have to have performance parts for those stock models to give them more power

the torque curve on the european n52 is much nicer +35lb.-ft. (235lb.-ft.) from 700-3000rpm

the data is all on bmw's site just no verification on how much more performance you can get out of there performance parts

[red-sauerkraut]

^The n52 is the same here. The power figure is lower because of the new HP rating used here from 2006 model year forward!

[raceman]

Originally Posted by jksgoh

there were a few discussions on the diff between the 190/200kw engines and the 160kw engines. most people seemed to think it was largely due to the differences in the intake manifold and an ecu change? but nothing was ever verified of course...

It is verified now.
Euro N52 speced engines from 2008 on differ in ECU only.
Earlier engines (and possibly engines that go to US) had/have difference in intake manifold.
I discussed it with BMW serviceman and at least for Euro, with software change 272HP is immediatelly reachable.
In US, you should talk with some expert in BMW to confirm that intake manifold is same like on Euro 125i or X3 (I think it is so).
Reaching 300HP doesn't require turbo at all in my country, as swaping cat/mid exhaust with straight tube and adding proper silencer do a lot (20 HP at least, more than 30HP on 135i) + intake will do the rest.
Such engine is real N52 beast without turbos and touching vital engine parts.
For bigger appetites, one should obviously start with 135i.

[DustinDep]

just curious what country are you in? on BMW.co.uk it states the 125i M Sport as the same HP as a 128i in the US

[DustinDep]

also has anyone checked into this because if this is true it would be absolutely amazing if we could just reflash our ECU to get 40 more HP

[red-sauerkraut]

Worth the read..

http://www.mwerks.com/artman/publish...nter_960.shtml

[Bimmer-Bob]

Originally Posted by DustinDep

just curious what country are you in? on BMW.co.uk it states the 125i M Sport as the same HP as a 128i in the US

The 125i M Sport is listed on the UK site as 218 hp, while the 128i is listed on the US site as 230 hp. Small difference, but different just the same.

[tgxmike]

Originally Posted by Bimmer-Bob

The 125i M Sport is listed on the UK site as 218 hp, while the 128i is listed on the US site as 230 hp. Small difference, but different just the same.

just to clarify, both cars have the same HP......

218hp at the wheels and 230bhp at the crank

[SlicktopTTZ]

Wow, you don't see much turbo cars over 100,000 miles? You must be blind then, or a complete fool. Also, what about people that think 280whp is still to slow? What are you gonna do with your "fully tuned" N52? In order for it to reach what I would consider fun it would need an actual build with a very balanced rotating assembly and a reworked valve-train to support 8,000+ rpm. Not to mention at that point putting iron sleeves and turbo-charging it would make it even better anyways. You can drive a turbo car very fast at a track, as long as the turbo is properly sized and you have the appropriate rubber to maintain traction in WOT conditions. Build two track cars, a 128i, and a 135i, and max them out in every way for racing while keeping their respective induction types (natural vs forced), still retaining the factory frame and suspension pickup points, and I bet the 135i will win every time, drag or track. They will basically be the same but with the 135i accelerating much quicker.

[Bimmer-Bob]

Originally Posted by tgxmike

just to clarify, both cars have the same HP......

218hp at the wheels and 230bhp at the crank

Call me skeptical, but I can't figure out why BMW would market the exact same car as the 125i in the UK, South Africa, and Australia and as the 128i in North America. The 0-60 times given are different (6.4s vs. 6.1s) and in both cases horsepower is listed as hp, not bhp. I'm not saying you're wrong - just that I'm not yet convinced. Got any more info on this?

[CarForHire]

[fatjoez]

wait for the 2L turbo

[Evice]

why wake up this thread after 1 year ? It is pointless. I'd love to get that 40 hp, but not happening. Just relax and save for a cayman s.

[DBFIU]

Originally Posted by red-sauerkraut

Worth the read..

http://www.mwerks.com/artman/publish...nter_960.shtml

The technology that goes into the N52 is fantastic. It is very impressive.

Although I read the entire article and am truly impressed with the engine, the article does point out all the weight savings, power gains, friction gains etc... yet the engine only puts out 240 HP? If I were to read that article not knowing the power output of the N52, I would guess just by reading that is makes 300 HP at least.

The honda K20 makes 200 HP from a 2 liter, why cant the N52 with far superior technology than the K20 make 300 HP from a 3 liter, inline 6 mind you, a better balanced engine than an inline 4.

I just don't get it. Either detuned from the factory, or something isn't right.

[Tom K.]

Originally Posted by DBFIU

The honda K20 makes 200 HP from a 2 liter, why cant the N52 with far superior technology than the K20 make 300 HP from a 3 liter, inline 6 mind you, a better balanced engine than an inline 4.

I just don't get it. Either detuned from the factory, or something isn't right.

Somehow, I don't think I'd care for a 7,000 rpm torque peak in either my 128i or 328i.

[DBFIU]

Originally Posted by Tom K.

Somehow, I don't think I'd care for a 7,000 rpm torque peak in either my 128i or 328i.

I wouldnt mind something like either, I was just stating why arent they at that point now with all the crazy sophisticated lightweight engine technology BMW is using in the N52. I was using the K20Z3 engine as a comparison.

[mike788]

?

[B_2_B_P]

Has anyone toyed with the idea of a twin charger(1 turbo and 1 super charger) like the VW? I would love that.

[Kaillen]

Originally Posted by B_2_B_P

Has anyone toyed with the idea of a twin charger(1 turbo and 1 super charger) like the VW? I would love that.

I doubt you would need a supercharger on an N52 with a turbo, and it would be expensive to implement correctly. IMHO, you would be better off upgrading the engine itself in addition to an appropriately sized turbo; a mixture of NA and Turbo. In all but drag racing, you're not looking for an excessive amount of torque down low, however you are looking for a faster spin up and HP at higher revs.

Cover the basics first;turbo kit (gt30r or gt35r), exhaust and a standalone ECU. Twin turbo's are possible, and you would use two smaller turbos to achieve a faster spool up, but that could prove to be a pain through corners, and you've just vastly increased your cost.

Lightweight rods and pistons, stage 2 or 3 cams, titanium valves and retainers, upgraded springs and a lightweight flywheel and a stronger clutch would be your next step. This is all assuming that you are upgrading the tires, brakes, chassis and suspension to handle the increase in power appropriately.

This engine has top end power in mind, something that a single larger turbo works very well with. Also, considering that this engine could be modified to support 9k+ RPM, a large turbo will really be able to shine as you'll be shifting into turbo with each gear on the straights.

300whp Supercharged 128i, it will be fast, but don't expect to be able to use all the power it gives down low.