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Old 03-30-2011, 07:40 PM   #1 (permalink)
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Turbo e30 325 eta

ok so i just picked up a 1986 eta with full intent of doing a turbo build.
i have been reading online for the past few weeks and finally posting my questions, yes i searched.

my plan;

take the "I" head and mate it to the "e" block, swap in the "i" afm and harness. would the engine then rev to 7k or would i still be reving to the eta's low 5k?(will adress tuning in next question)
now i have lower compression, which is supposed to be good for turbo apps. right?

next im pretty confused about the FMU set up. i see some people doing the MSD ignition system but not sure what they use for their FMU, would an adjustable fuel regulator cut it and larger injectors or would i need something more like the Miller War chip? Mega squirt scares me...i know i know, but this is gonna be my first build. i know the miller chip makes it easier to tune, also would i then be able to ditch the msd?



my goals
-to run around 8-9psi but being able to bump up to 13-14 when i want.
-250whp
-being able to smoke most m3's, almost all ricers, and most others who want to toy with some german metal.

thanks in advance.
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Old 03-31-2011, 12:36 PM   #2 (permalink)
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come on, someone can help me!
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Old 03-31-2011, 12:49 PM   #3 (permalink)
OMFG another one!?
 
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Have you searched the site? There are compatibility issues between the e block and i head.
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Old 03-31-2011, 12:53 PM   #4 (permalink)
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some stuff says the i head only works on the super eta block, but then i read other things that say otherwise.

i hadn't been finding any difinitive answers.
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Old 10-23-2012, 12:12 AM   #5 (permalink)
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you are going to have to use all of the top end componets off of the m20b25 engine and the wiring and computer MAF and crank sensor i am in the middle of a turbo build for my 87 325e and your best bet to get the most out of your engine is going to be with a MS kit it looks complicated but do ur research and the unit darn near builds itself think Happy boost good luck
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