2.5 to 2.8 - M52

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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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sleeper Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Original and STILL best Joined: 26-March-2004 Location: East Sussex/Kent border Status: Offline Points: 2098	Topic: 2.5 to 2.8 - M52 Posted: 02-July-2004 at 09:21
	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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dave 328 Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 21-October-2003 Location: United Kingdom Status: Offline Points: 835	Posted: 02-July-2004 at 11:41
	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

sleeper Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Original and STILL best Joined: 26-March-2004 Location: East Sussex/Kent border Status: Offline Points: 2098	Posted: 02-July-2004 at 11:48
	absolutely, horses for courses and all that. the 325 is more revvy I think. still itching to get this manifold kit on....... RRRAAAAHHHH!!!


dave 328 Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 21-October-2003 Location: United Kingdom Status: Offline Points: 835	Posted: 02-July-2004 at 13:02
	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

SundayJumper Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Senior Member II Joined: 03-July-2004 Location: West Berkshire Status: Offline Points: 220	Posted: 03-July-2004 at 19:37
	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

sleeper Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Original and STILL best Joined: 26-March-2004 Location: East Sussex/Kent border Status: Offline Points: 2098	Posted: 04-July-2004 at 11:30
	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.....