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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 10-15-2005, 09:09 PM   #1 (permalink)
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turbocharging an m20

is an m20 reliable enough to turbo whatwould i need to do to make it reliable how much would it cost me
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Old 10-15-2005, 10:26 PM   #2 (permalink)
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Well I just bought a Dinan Turbo E30 which runs up to 13psi just fine. It does have a bigger HG and some other things done to strenghten the motor's internals. You for sure would need a bigger headgasket and studs (400-500 for good stuff) and then I bet you could run 7-9psi on it just fine.
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Old 10-17-2005, 03:03 PM   #3 (permalink)
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jrhaile did u buy ur friends e30?????????????
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Old 10-17-2005, 04:42 PM   #4 (permalink)
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bmw2002.com Ireland Engineering...they sell the mossleman system which is supposed to be pretty solid.
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Old 10-17-2005, 08:13 PM   #5 (permalink)
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there was a whole debate about this thing on the bimmerforums under the e21 forum, go check it out.....
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Old 10-18-2005, 03:53 AM   #6 (permalink)
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Originally Posted by jrhaile
You for sure would need a bigger headgasket and studs (400-500 for good stuff) and then I bet you could run 7-9psi on it just fine.
not needed at all. if under 10psi is the goal on a smaller turbo, just switch to the newer torx headbolts or some 12.9 bolts and you're fine as far as internals go.

if you want to pay for a kit, then go through tcd. if you want to build your own kit then do some research at e30tech. there's a turbo faq along with many many many threads about the subject, so searching should answer any possible question you may have.
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