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View Full Version : E30 E and I motor setup for boost


racing_trend
09-24-2007, 12:17 AM
hey guys i have a spare 325I head i was thinking of sending it out for rebuild and to throw it on my Eta bottom end and turboing, does anyone know what will be the end compression ratio of a stock 2.7bottom end with a 2.5 top end?

FuryriderX
09-24-2007, 04:51 PM
searchy searchy searchy!

http://www.maxbimmer.com/forums/showthread.php?t=95330

SamE30e
09-24-2007, 04:55 PM
I heard on bimmerforums that it ends up to be 8:1.