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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-24-2011, 02:49 PM   #1
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Building a s54

Hey guys, I tried to do some research on this board and most other bmw/m3 boards but didn't really find the answer I was looking for. Maybe I didn't use the right keywords? I dont know, but apologize if this question has been answered before.

I am going to have to pull my s54 and replace the bearings because previous owner ran the wrong oil. I want to go ahead and put forged pistons/rods in the thing. I have looked on hpf and activewerks website for what they carry. And I found the rods I "think" would be best suited for me on hpf's website link
As for pistons I am unsure of, I was considering JE? Because I have used them in the past for my lsx cars. Would anyone have a recommendation towards a different brand? And a place I could possibly buy the pistons from? Also this might be a really retarded question but what bearings should I go with?

My goal with the motor is simple: build it to stock specs except with forged internals. Maybe later on down the line throw a little bit of forced induction its way. I have also considered how the compression ratio is 11.5:1 I should get 10:1 compression pistons maybe? Since I plan on going FI in the future?

I appreciate any help or advice I can get.

Thanks Ahead
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Old 01-24-2011, 03:25 PM   #2
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S54 already has forged rods.
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Old 01-24-2011, 07:15 PM   #3
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Originally Posted by aggieE46 View Post
S54 already has forged rods.
ohh well I feel stupid!

Thanks Guess I'll just reuse the rods just replace bearings and pistons
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Old 01-24-2011, 07:24 PM   #4
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Check out MattQ's NA build on the FI forum - lots of details and pictures

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