2.5 to 2.8 - M52
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Category: Technical & Model Specific Forums
Forum Name: General Motors
Forum Discription: This forum will deal with technical issues for the cars not dealt with in the other forums. These don't need to be BMWs!
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=8801
Printed Date: 26-June-2024 at 01:13
Topic: 2.5 to 2.8 - M52
Posted By: sleeper
Subject: 2.5 to 2.8 - M52
Date Posted: 02-July-2004 at 09:21
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Having a retentive moment the other day I was studying the specs of the M52 range and it appears the only mechanical changes to go to 2.8l is crank and pistons. maybe rods too, but I doubt it. Opinions on 2.5 versus 2.8 and thoughts on the above would be appreciated! ------------- 
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Replies:
Posted By: dave 328
Date Posted: 02-July-2004 at 11:41
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Haven't drove the 325 but every one says the 328 is great for low down torque.
I would guess at the bottom end being different and the rest the same. Going from 325 to 328 will give an increase of about 10% in power. Depends if its worth it. ------------- 
328 Coupe Sport, Digital climate, full leather, OBD computer, De-restricted with M50 manifold, big bore throttle, chippeduk remap, custom cold cone intake and X-brace |
Posted By: sleeper
Date Posted: 02-July-2004 at 11:48
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absolutely, horses for courses and all that. the 325 is more revvy I think. still itching to get this manifold kit on....... RRRAAAAHHHH!!! -------------
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Posted By: dave 328
Date Posted: 02-July-2004 at 13:02
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Yeah the 325 might be more revvy than the 328 as the 328 will probably be a longer stroke for more torque. -------------
328 Coupe Sport, Digital climate, full leather, OBD computer, De-restricted with M50 manifold, big bore throttle, chippeduk remap, custom cold cone intake and X-brace |
Posted By: SundayJumper
Date Posted: 03-July-2004 at 19:37
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The 2.8 had an alloy block, instead of the cast iron one in the M50. It has a different (more restrictive) intake manifold, and of course a completely different management system ! Steve. ------------- Sundayjumper - now with added 328 Sport |
Posted By: sleeper
Date Posted: 04-July-2004 at 11:30
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wotcher. me & dave are both running M52's, dave has done his manifold and i am doing mine next weekend- bye bye restriction! I have been told that the B25 in the 323 has a map which will 'learn' and can eclipse the mapped fuelling addresses within the B28 system so hopefully I can leave the reprogramming to after we have seen Dr Schrick..... -------------
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