Difference btw M43 and N42 engine for E46?

[mybmmer318]

Hi, i believed e E46 has 2 different types of engine fitted on them... The M43 engine seems like the batch which is earlier between 1997 to late 2000 and the N42 is after 2000.... can anyone enlighten me what are the differences between this 2 types of engine and do they share e same DME(ecu) in this case for manual E46...

Pls advise.. thks..

 

[TripleM]

Re: Difference btw M43 and N42 engine for E46?

Perhaps this might help you more in details

http://en.wikipedia.org/wiki/List_of_BMW_engines

 

[emiffy]

Re: Difference btw M43 and N42 engine for E46?

Wah... N42 win award! But M54 overshadowed by it's M3's brother, the S54...

BTW -- Wiki noted that some 318i are running the N46B20 engines. Wonder if PML brought them in?

 

[kenntona]

Re: Difference btw M43 and N42 engine for E46?

BTW -- Wiki noted that some 318i are running the N46B20 engines. Wonder if PML brought them in?

Yes, I was told the same thing. Apparently the last batch of E46 318i is running on N46 (150 bhp) block - same as those in E90 320i.

 

[mybmmer318]

Re: Difference btw M43 and N42 engine for E46?

So as to say there is not much difference in terms of technical specs for e 2 engines but is just that the earlier e46 uses M43 where the later E46s uses N42.. But both of them are vanos engine am i rite? The M43 is 1.8L will produce 115BHP while e N42 is 2.0L and it produce 140BHP..

 

[hitmee]

Re: Difference btw M43 and N42 engine for E46?

Yes, I was told the same thing. Apparently the last batch of E46 318i is running on N46 (150 bhp) block - same as those in E90 320i.

mine is the last batch. how to verify? can i tell from the chasis number?
if really is N46, then pick up cow dung

 

[martmode8850]

Re: Difference btw M43 and N42 engine for E46?

mine is the last batch. how to verify? can i tell from the chasis number?

check your log card bro... engine number... mine ends with N46B20A...

 

[hitmee]

Re: Difference btw M43 and N42 engine for E46?

check your log card bro... engine number... mine ends with N46B20A...

so u mean ur is the 150hp engine? same as e90?

 

[hitmee]

Re: Difference btw M43 and N42 engine for E46?

my engine num ends with N46B20AA.

2AA somemore. ha ha

so what does it mean?

 

[kenntona]

Re: Difference btw M43 and N42 engine for E46?

Mean N46 = 150 bhp lor.

 

[hitmee]

Re: Difference btw M43 and N42 engine for E46?

no lei. check internet E90 is N46b20B.
for the same engine num N46b20A, can be 143 or 150hp. No significant evidence to suggest that N46B20A is confirmed 150hp.

Unless jio one E90 to cheong one time to test? ha
my house got both E46 and E90. should i do the comparison? self dynos

 

[kenntona]

Re: Difference btw M43 and N42 engine for E46?

no lei. check internet E90 is N46b20B.
for the same engine num N46b20A, can be 143 or 150hp. No significant evidence to suggest that N46B20A is confirmed 150hp.

I'd guess you are right, not sure if it 143 or 150 bhp...... But can confirmed this - if your 4-pot is built in 2004, it is N46, not N42 block.

http://en.wikipedia.org/wiki/BMW_N46

 

[hitmee]

Re: Difference btw M43 and N42 engine for E46?

N42 or N46 if they are the same 143hp, so what difference does it make? does it mean that N46 got more room for mod later?

 

[kenntona]

Re: Difference btw M43 and N42 engine for E46?

N42 or N46 if they are the same 143hp, so what difference does it make? does it mean that N46 got more room for mod later?

Still 4-pot. Mod potential low......

 

[martmode8850]

Re: Difference btw M43 and N42 engine for E46?

am surprised that the last batch of E46s valvetronics have the same engine as the E90 320s...

read in the BMW mag that the E90 bhp increase was due to mods done to air-intake, exhaust and probably ECU... 105kW to 110kW... dont know if it is just this simple, i suspect there should be more to it though...

Still 4-pot. Mod potential low

yes... not much room and potential... however, there is a limited edition E90 320i with 177bhp... think it's only 120 production units in the world... not sure what they did to achieve this though...

 

[hitmee]

Re: Difference btw M43 and N42 engine for E46?

yeah. i read in BMW mag, they produce 2000(or 120??) 320SE. 170hp. shiok.
I think only selling in europe.

if can tune to 170hp liek my Ex Civic SIR i happy liao. ha

 

[TripleM]

Re: Difference btw M43 and N42 engine for E46?

Those 170bhp one is not Valvetronic engine.
It has low torque but free revving like VTec....steam ah.

 

[emiffy]

Re: Difference btw M43 and N42 engine for E46?

That was the 320si version

 

[hitmee]

Re: Difference btw M43 and N42 engine for E46?

Those 170bhp one is not Valvetronic engine.
It has low torque but free revving like VTec....steam ah.

then i no want valvetronic liao.
give me that engine....