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General E46 Forum
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Old 11-29-2010, 10:01 AM   #1
rfier
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Question Question about turbo on a 99 323i

is the engine on the 99 323i e46 strong enough to handle a small turbo kit or do i need new pistons and all that **** first?
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Old 11-29-2010, 10:59 AM   #2
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Check the FI forum and do a search. Way too many variables for a simple answer. See Bluejeansonfire etc for info. I think he still has a website up on what he did to his non-M.
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Old 11-29-2010, 11:38 AM   #3
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sure you can put a turbo on it, but you cant run too much boost. also programming it is going to be a *****
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Old 11-29-2010, 11:55 AM   #4
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stock internals willl hold 8-10psi depending on who you ask. there was a guy who put boost into a 325xi a little whileago and posted a nice thread about it. The issue is teh tuning - he went to a stand alone fuel management.
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Old 11-29-2010, 11:56 AM   #5
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If your engine is in good shape, you can turbo it. Once this gets moved to FI section you will have better feedback....
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Old 11-29-2010, 11:59 AM   #6
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You can stroke the m52tu25 block in your 323i with the m54b30's forged crank, rods, & pistons. All the blocks in the e46 3 series, except m3, have a 84mm bore. The head is the same as well so you could cam it with a ZHP cam or stay with the regular 3.0 cam. I hear there is a sacrifice in the low end with ZHP cams so they could extend the high end performance to give you more of an 'm3 feel' on the acceleration. After you have updated your engine to 3.0 status you can blow it with a Technique Tuning Stage 1 or Stage 2 Turbo kits and run about 320-374 RWHP with just a new head gasket (compression) and 140 studs. Check it out on youtube. There is a TT Stage 1 330i running 12.8 in the 1/4 mile.
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Old 11-29-2010, 01:01 PM   #7
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okay how did i miss this! First of all i have done exactly what you are asking. Check out my build thread bt searching my name in forced induction forum! Short story is yes you can without touching the engine do not i repeat do not go above 8psi max! You will need some sort of engine management. How much power are you looking to get? PM any questions and i will do my best to help you.
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Old 11-29-2010, 01:03 PM   #8
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Originally Posted by ilovebeemers View Post
You can stroke the m52tu25 block in your 323i with the m54b30's forged crank, rods, & pistons. All the blocks in the e46 3 series, except m3, have a 84mm bore. The head is the same as well so you could cam it with a ZHP cam or stay with the regular 3.0 cam. I hear there is a sacrifice in the low end with ZHP cams so they could extend the high end performance to give you more of an 'm3 feel' on the acceleration. After you have updated your engine to 3.0 status you can blow it with a Technique Tuning Stage 1 or Stage 2 Turbo kits and run about 320-374 RWHP with just a new head gasket (compression) and 140 studs. Check it out on youtube. There is a TT Stage 1 330i running 12.8 in the 1/4 mile.
this is all true but if you are going ot open up the engine spend the extra money to buy forged internals from someone like cp for pistons, and arrow for rods. Otherwise you will spend all that money and be limited to 375 rwhp
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Old 11-29-2010, 04:25 PM   #9
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Originally Posted by jacobs323i View Post
okay how did i miss this! First of all i have done exactly what you are asking. Check out my build thread bt searching my name in forced induction forum! Short story is yes you can without touching the engine do not i repeat do not go above 8psi max! You will need some sort of engine management. How much power are you looking to get? PM any questions and i will do my best to help you.
honestly rignt now i would be happy with a good 300 rwhp with all my mods together and i was told the best way to get there from 170-180 is a "small" turbo but i was also told "only if my engine internals are forged" so i was wondering ... knowing that they are not if i will damage my engine if i got a small turbo.
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Coming Soon: H&R Sport Cup Kit, M3 Front Bumper, MTech Rear Bumper, GTR Style Hood, E-bay Headers, Rear LEDs, 18s, Magnaflow Muffler, BMW E46 330i M54 3.0L Engine

Last edited by rfier; 11-29-2010 at 04:29 PM.
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Old 11-29-2010, 04:51 PM   #10
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Originally Posted by rfier View Post
honestly rignt now i would be happy with a good 300 rwhp with all my mods together and i was told the best way to get there from 170-180 is a "small" turbo but i was also told "only if my engine internals are forged" so i was wondering ... knowing that they are not if i will damage my engine if i got a small turbo.
What kind of mods are you talking about?

Do I see a black hood and hood pins in your sig?
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Old 11-29-2010, 04:57 PM   #11
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The hood pins are for the inevitable engine fire
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Old 11-29-2010, 05:12 PM   #12
rfier
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Originally Posted by Blocked Out View Post
What kind of mods are you talking about?

Do I see a black hood and hood pins in your sig?
yes you do the black hood is from a front end collision b4 i bought the car the pins are because the wire that popped the hood broke and we couldn't get the hood back open so... we removed all the locks and put hood pins ... its all temporary and i hate it ... Im getting this soon: http://cgi.ebay.com/ebaymotors/1999-...Q5fAccessories and im going to get it color matched to the car except the vents
As far as mods i was talking about an ECU Upgrade or reprogram, a new clutch, headers, downpipe, & muffler
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