What is best for me to do. have a 325es and a 325I sport

[lukec88]

hi there. i hit my sump lastnight on my G plate 325I Sport mtech 2 2.5, as it happened i broke down outside a guys house that had a 1986 325es 2.7 on a D plate (LHD, US spec, full leather, bbs alloys etc) that wanted to sell for a bargain price which i wont say so i bought it today.
i understand the 325es with a 2.7 is less powerful than my 325I sport with a 2.5, but if i mixed my head on to that block can i gain more power? or if it will not gain me any power can i just take the sump from the 2.7. any ideas or suggestions are massively appreciated. thanks luke

[leeparkes]

The 2.7 bottom end with a 2.5 head will give more power, there's a thread somewhere on how to and different variations to get to 2.7.

[leeparkes]

http://www.e30zone.net/e30zonewiki/inde ... ding_a_2.7

[fuzzy]

whats the big secret on the bargain price?

[lukec88]

Thanks guys and I got the whole 325es for £200 ;)

[fuzzy]

sounds like there will be money to be made in breaking it then.

[lukec88]

yeah definitely. im only taking a few bits off of it then break the rest unless someone wants to take whats left off my hands

[lukec88]

so from that 2.7 wiki thread is it saying im best to put my pistons from my 325 sport in the 2.7 block? bit confused here.

[HairyScreech]

if you use an 885 head then you would be best served using bowled 2.5 pistons, if you use a 731 head then stick with the eta pistons.

really a 2.7 has too short a stroke for the 2.5 pistons to be fitted and too high a compression if the 885 head is used with eta pistons.
in fact i think they may clash but its late and my brain stopped working hours ago.

[lukec88]

885 head is my sport 325 head? and 731 is from a 320? my 2.7 is a october 1987 registered car and has a 6k rev counter which is mentioned so is it a super ETA? as mentioned in the sticky?