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Old 06-14-2019, 09:27 AM   #1
Wassimnasr
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2.8 engine on 325 2002 with 3.0 manifold

I own a 2002 325 my engine was already dying so i made a swap with a 2.8 but kept everything electrical from the old engine , recently i have swapped the 2.5 manifold with 3.0 "manifold + disa + throttle-body + fuel injectors"
Maf + everything else remains from the old engine .
Im considering a map asap but i need to know what else to change before doing the map !! Or any advice would be much appreciated ***x2764;***xfe0f;
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Old 06-14-2019, 10:21 AM   #2
MJC12
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This might help. Looks like you're on the right track.

https://e46fanatics.com/forum/showthread.php?t=1005752
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Old 06-14-2019, 12:59 PM   #3
Effduration
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I am assuming the 2.8 is from '99 or '00 and is the M52TU engine?..
Not the M52 from '96-'98?
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Old 06-14-2019, 01:03 PM   #4
Wassimnasr
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Thanks very much
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Old 06-14-2019, 01:03 PM   #5
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True its the tub
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Old 06-14-2019, 01:13 PM   #6
Effduration
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This should run okay w/out re-mapping.. please let us know how it works out. I probably would have tried to get the M52TU block running with the stock 2.5 tune, intake, MAF, TB first, and then upgraded, but it probably won't matter.
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Old 06-14-2019, 01:49 PM   #7
Wassimnasr
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I had the 2.5 manifold on for a while but when i had the 3.0 on the car felt a bit faster and there was a a huge difference with response specially on high rmp but still on low level idk its kinda slow
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Old 06-14-2019, 02:42 PM   #8
MJC12
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So if you had a working M52TU and then swapped the M54B30 Manifold, Disa, TB, and Fuel Injectors and it's still working then I think you're good to go. Only question I have is what is your situation with the Intake Air Temp Sensor?
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Old 06-14-2019, 03:13 PM   #9
Wassimnasr
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I got the IAT in the manifold seems its from an older model ... what im wondering about is if i have to change other sensors for example knock sensor and the maf !!
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