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Old 06-14-2007, 06:53 AM   #1
jimma
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316 vs 318

I was looking at the specs of my 316 with the M43 engine and compared it to the 318 with the same engine and noticed the 318 has 10BHP more (316=105bhp and 318=115bhp). Does anyone know if this is purely down to engine management? are they interchangable?
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Old 07-01-2007, 04:48 PM   #2
jimma
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I was looking at the specs of my 316 with the M43 engine and compared it to the 318 with the same engine and noticed the 318 has 10BHP more (316=105bhp and 318=115bhp). Does anyone know if this is purely down to engine management? are they interchangable?
Lol...im going to take a wild stab in the dark at this one and say its throttle body related.....maybe a slightly different exhaust manifold...but unlikely...possibly an ecu change
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Old 07-14-2007, 05:12 PM   #3
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Lol...im going to take a wild stab in the dark at this one and say its throttle body related.....maybe a slightly different exhaust manifold...but unlikely...possibly an ecu change
Well i managed to find the answer after alot of searching. It turns out that the differences between the 318 with the M43 engine and the 316 with the same engine is the ECU Map and the throttle body/intake, turns out to be a simple upgrade for the 316
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Old 02-29-2008, 06:57 AM   #4
badd ass
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jimma,
i have a 316, can i just simply change/swap my throttle body/intake to gain hp?
thanks!
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Old 09-13-2008, 05:09 AM   #5
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Is this right?
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Old 09-13-2008, 06:00 AM   #6
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wow im intereted.
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Old 09-13-2008, 06:54 AM   #7
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The 316 don't have a DISA...(i'm not sure)
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Old 09-13-2008, 11:57 PM   #8
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i was thinking this but then i asked myself, why would they have 2 models which nearly match excatly and would be soo simple that you can convert the 316 to 318 i still want to knw the main differance. and where this power is coming from. even the insurance group is different for both models.
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Old 09-14-2008, 12:01 AM   #9
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not a big deal, but doesnt the 318i have 118bhp
lol
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Old 09-14-2008, 06:18 AM   #10
rishisen
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yep it does
.
its kinnda annoying tha bmw did this, why charge for only 10 ish more bhp why not all of them being the ultimate driving machine
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Old 09-14-2008, 10:18 AM   #11
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yep it does
.
its kinnda annoying tha bmw did this, why charge for only 10 ish more bhp why not all of them being the ultimate driving machine


so true. i have the 316 m43 auto engine and would like it if it had the 318 power and main thing the mpg it does
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Old 09-14-2008, 12:15 PM   #12
rishisen
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yeh, same here, does anybody know if we have that cdv thingymagig, becuase ive found i really hate going from 1st to 2nd theres liek no power for a few seconds,
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Old 09-14-2008, 03:33 PM   #13
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i believe the Cam is also different. the part nos are different anyway. the whole intake seems identical though!
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Old 09-20-2008, 01:39 PM   #14
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i have a 318i 1.9 tourer with the m43tu engine and thats a bit sluggish getting going until it hits about 3500rpm and then it starts to go but bottles it when it hits the rev limiter
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Old 03-11-2009, 07:26 PM   #15
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According to Real OEM the cam for the 316 and 318 have different part numbers, however I contacted an independent specialist who confirmed that they do have different part numbers but are infact the same part....not sure why they would have differnt numbers though

exhaust manifold, head etc etc are the same

The intake is exactly the same, except the 318 has a DISA valve to take advantage of the variable length inlet manifold....so perhaps there is some gains to be had here at 3000rpm+

The DME (ecu) is different (same model different software)

I have changed the inlet manifold on mine to the 318 model with DISA, the 316 does have the relevant connector for it already built into the loom and is powered. I do not know if the DME is programmed to activate this properly though? I assume not as with it disconnected on the 316 wouldnt it throw a fault code?

I have now got 318 dme with all the ancillary components needed (key,ews.speedo etc etc) once i get this installed I will get a power reading to see the effects.

Last edited by jimma; 03-11-2009 at 07:29 PM.
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Old 03-23-2009, 08:39 PM   #16
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now then mate!
did you get around to hooking it all up? whats the verdict?
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Old 03-25-2009, 12:13 PM   #17
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having a bit of a nightmare getting my coilovers setup...as soon as ive done it I will get the dme etc in and let you know how it goes
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Old 03-25-2009, 01:29 PM   #18
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Go 330
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Quote:
Originally Posted by Fly330ciGuy
can you come over and take alook at it i dont know where my fuel pump is. i tried asking in the general e46 forum and they just told me to stop posting and to stick a steak in my engine
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Old 04-18-2009, 03:29 PM   #19
devious d
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bmw did this with the e36 with the m50 and m52 engines 320,323 ,328 changed the bore but put 320 manifold on all cars
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Old 04-27-2009, 01:00 AM   #20
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I had a '99 316i silver V reg in uk and my bro had a 00' 318i W reg. There was litterally no difference in how the cars handled. In fact mine felt better IMHO maybe because mine had 16" wheels while my bro's had 15".
I now have a 02' 318i but this has the newer N42 engine in Australia. I feel no real difference apart from better fuel economy on long motorway driving.
I think its a waste of time and energy trying to convert a 316i to have 10 more bhps.
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