Any advice on what to do/replace would be very welcome, cheers.
2.7 CONVERSION
Moderator: martauto
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tomson
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Please help!! I have a 525e (2.7) engine sat about that im plannin on puttin into my 325ix touring! But have been told the cranks are weak and i should rebuild the 525e lump to alpina spec before dropping it in?
Any advice on what to do/replace would be very welcome, cheers.
Any advice on what to do/replace would be very welcome, cheers.
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Jimbob
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Please don't double threads pal 
As for the crank, it's fine - there's a myth (not sure how true it is) but it's been heard that their rev limit is around 6200rpm otherwise it might break.
As for the crank, it's fine - there's a myth (not sure how true it is) but it's been heard that their rev limit is around 6200rpm otherwise it might break.
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tomson
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thanks for clearing that up about the crank pal, but should i just put it in as it is or renew cam, injectors....what??
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tomson
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320 head, 325 pistons?????? can anybody please give me a shopping list of what i need?? thanks
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Stevin
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Haha, there is nothing wrong with an 'e' crank... nothing at all.
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Andy_magic
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I've not managed to snap mine YET! The forged cranks from 324TDs are stronger but I think the ETA crank will be fine.
The cheap way to fit an ETA is to drop a 320i head straight on, swap the sump and all the electrics over and go drive.
The cheap way to fit an ETA is to drop a 320i head straight on, swap the sump and all the electrics over and go drive.
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tomson
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Ok, Cheers. What would be the the expensive way then? i want to get as many ponies out of this 2.7 without lookin at blowers/super chargers...
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M5pilot
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Get yourself some lightweight pistons from the states.
Get a engineering/machine shop todo all the measurements to get you a nice high coimpression ratio of around 10.5:1
Do lots of work on a 325i head - ported etc similar to player6's head which is a piece of art.
Use a Schrick 284/272 cam
use megasquirt for fuelling and spark getting rid of the AFM.
You should pass the magic 210 bhp.
Get a engineering/machine shop todo all the measurements to get you a nice high coimpression ratio of around 10.5:1
Do lots of work on a 325i head - ported etc similar to player6's head which is a piece of art.
Use a Schrick 284/272 cam
use megasquirt for fuelling and spark getting rid of the AFM.
You should pass the magic 210 bhp.
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tomson
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nice 1 guys, with what youve said and some hunting around on here i think ive found all i need to know!!
all though i have another dilema that i will post seperatly!!
all though i have another dilema that i will post seperatly!!
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Stevin
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If ur getting happy with custom pistons, u could always go up to a 86mm bore... giving u a nice 2.8lt (food for thought with a 330i crank, u can bump it up to 3.0lt, and 2.9lt with 328i crank) or u could use some S50B30 pistons, and cut the tops down which would also give the same effect, as well as a 10.5:1 CR depending on how much ur head has been skimmed