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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 03-03-2009, 02:17 AM   #1 (permalink)
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turboing my 318

qestion everyone i have a 318i m options 1997 what mods would i have to do to if i was to turbo it but wouldnt cause proplems
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Old 03-03-2009, 09:45 AM   #2 (permalink)
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Giorgiobmw,

It all depends on the budget, and what level you want to go to. What sort of power levels do you want to attain?

Very high levels means a full rebuild on the motor and lowering the compression ratio to match the extra psi of boost, plus extra fueling, extra exhaust.... You will also need to make sure the suspension and brakes will safely stop you too.

Most motors will take 2psi boost without an issue.

I'm not sure about the ecu on this model, but generally you have to incorporate a MAP instead of MAF and get the ecu to understand whats going on. This is normally done via a piggy back system. The computer is used to dealing with a flow of air, not an amount of positive air pressure to regulate the timing/fueling map.

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Old 04-09-2009, 11:45 PM   #3 (permalink)
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Just curious if you had any luck with adding the turbo?
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Old 04-10-2009, 12:20 AM   #4 (permalink)
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It's doable, but IMO not worth it because in order to make good, reliable, consistent power you would more than likely need to build the engine.
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Old 04-10-2009, 12:31 AM   #5 (permalink)
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Why? with all due respect, sell the 318, add the proceeds to what youwere already oing to spend on a turbo, and get a 325 with two more cylinders.
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Old 04-10-2009, 01:45 AM   #6 (permalink)
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I disagree. Ive seen m42 and even m10 turbos put down 310whp on a stock block. Turbo 4's are cool, in my book.

Plan to set aside 5-12,000 for the job tho, if you arent into fabricating/ tuning yourself. If you are, I've made complete bmw turbos for under 2,000 before.
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Old 04-10-2009, 02:41 AM   #7 (permalink)
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Originally Posted by nukeduster View Post
I disagree. Ive seen m42 and even m10 turbos put down 310whp on a stock block. Turbo 4's are cool, in my book.

Plan to set aside 5-12,000 for the job tho, if you arent into fabricating/ tuning yourself. If you are, I've made complete bmw turbos for under 2,000 before.
My opinions come from a experience I knew a kid with one. He ended up pushing the limits too far and blew three out of 4 rods through the bottom of his crankcase.
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Old 04-10-2009, 06:19 AM   #8 (permalink)
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plus one on turbo 4s
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Old 04-10-2009, 10:51 AM   #9 (permalink)
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My opinions come from a experience I knew a kid with one. He ended up pushing the limits too far and blew three out of 4 rods through the bottom of his crankcase.
Yea.. i've seen plenty of blown, and blown (turbo/super) engines. Poor/no tuning or pushing the limits *too* far are what pops engines.. or engines that are simply old/worn out/use the wrong weight oil and have metal to metal contact.

BMW 4's can support 300whp reliably stock, same with m30 and m20 motors. bmw m50/52's can support 600whp reliably with a mls HG, m60/62 motors seem to top out at 450hp before reliability becomes an issue.

Those are the only engines I've much experience w/. The s62 and s54 seem to have respectable limits too tho I've never had friends with enough money to be able to play with those cars much.
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Old 04-11-2009, 09:59 AM   #10 (permalink)
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Downing atlanta has a SC kit for the m42/44 I think it will get you up near 200hp. I know you can get these engines to put out 300hp but its going to take some money.
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