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Motorsports & Track Forum
From Auto-X to Trackday to Racing and Professional Motorsports this is the place to discuss making BMWs fast

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Old 02-17-2007, 02:32 AM   #1
PEI330Ci
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Naturally Aspirated M54B30 Engine Build

Bimmerworld (www.bimmerworld.com) is providing technical support throughout the entire car rebuild. For the engine specifically, I'll be sourcing additional "race" components, fuel system components, and engine management electronics through them. Bimmerworld is fielding 3 cars in the 2007 Speed World Challenge Touring Car championship. Information on the team can be found on their website: www.bimmerworldracing.com

VAC Motorsports (www.vacmotorsports.com) will be sourced for all the engine internals and the oil system.

Metric Mechanic (www.metricmechanic.com) initially built the cylinder head as a high performance street head. It's now undergoing flowbench testing and additional porting to develope more airflow. More on this later.

Machine work on the block will be handled locally. I will be doing all of the assembly work myself.



The engine is out of my 330Ci, and it's getting torn down to the block for the complete rebuild.



Is there something wrong with the engine? Nope. I just want more power without compromised reliability. When I approached numerous engine builders with my goals for the M54B30, they all said it couldn't be done without going into the bottom end. So heeding their advice, I'm going to use the best parts available to create a bulletproof bottom end.

The entire build process will be documented in detail on My330i.com in the "General Forum" (www.my330.com) Updates and pictures will be added here as the project progresses.
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Old 02-17-2007, 09:10 AM   #2
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how many KMs do you have on it?
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Old 02-17-2007, 11:52 AM   #3
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how many KMs do you have on it?
120k

There was NOTHING wrong with it when I took it out of the car. I was tempted to try using it for the next step of my project, but decided to do it right and build the engine.

FYI, the last time the car was seriously driven was in September when I ran a 12.8 second 1/4mile with it. Since then the car has been in storage, or taken out for grocery runs. LOL
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Old 02-20-2007, 10:31 AM   #4
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That crankshaft should be fine right? Isn't it the same one used in the S52 that handles amazing amounts of HP?
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Old 02-20-2007, 12:57 PM   #5
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wow, just got done reading your other thread, why not cut out the spare tire well?
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Old 02-20-2007, 02:38 PM   #6
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wow, just got done reading your other thread, why not cut out the spare tire well?
Maybe so he can fit a huge bottle of nitrous
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Old 02-20-2007, 03:51 PM   #7
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Maybe so he can fit a huge bottle of nitrous
maybe, but it doesn't seem like he is concerned with two sets of golf clubs in the trunk, so I would imigine he would have room elsewhere.
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Old 02-20-2007, 10:03 PM   #8
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Quote:
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That crankshaft should be fine right? Isn't it the same one used in the S52 that handles amazing amounts of HP?
The crankshaft is based off of the S52, but is a different stroke.

Quote:
Originally Posted by davidwarren View Post
wow, just got done reading your other thread, why not cut out the spare tire well?
I already have.

Quote:
Originally Posted by Activ3 View Post
Maybe so he can fit a huge bottle of nitrous
Actually, I have 4 nitrous bottles, but nitrous isn't the topic here. The removal of the tire well did have something directly to do with the engine though...

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Old 02-21-2007, 05:52 AM   #9
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I thought the stroke was both 89.6mm on the m54b30 and the s52b32? The only difference being the bore of 84mm on the m54 and 86.xx on the s52?

I remember a while back I wanted to swap an s52/m54b30 crank into my 328 to get the same 3.0 displacement.
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Old 02-21-2007, 09:38 AM   #10
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I thought the stroke was both 89.6mm on the m54b30 and the s52b32? The only difference being the bore of 84mm on the m54 and 86.xx on the s52?

I remember a while back I wanted to swap an s52/m54b30 crank into my 328 to get the same 3.0 displacement.
You are correct on the stroke.

For anyone looking for an extreme crank, I have a source for 94mm stroke.
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Old 02-21-2007, 10:48 AM   #11
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94mm would be what? 3.3L on the 84mm bore?
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Old 02-21-2007, 03:27 PM   #12
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You are correct on the stroke.

For anyone looking for an extreme crank, I have a source for 94mm stroke.
Who could tune for that?
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Old 02-21-2007, 03:45 PM   #13
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this is going to be an awesome thread to follow, pei330ci does awesome work

your lightweight car brings back the essence of free speed to fatter and fatter cars
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Old 02-21-2007, 06:23 PM   #14
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Quote:
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94mm would be what? 3.3L on the 84mm bore?
About 3.15l.
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Old 02-21-2007, 09:41 PM   #15
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94mm would be what? 3.3L on the 84mm bore?
In addition to the 94mm crank, you'd need an 86.3mm bore for that which isn't advisable with the M54 block. It can be done, but the cylinder liners would be mighty thin.

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Originally Posted by Nico3k View Post
Who could tune for that?
It may not be as difficult as you think. Our engines are basically an air pump with fuel being added. The more air that is pumped through, the more fuel is added by the engine's ECU, as the air is metered as it enters the intake tract. Adding more stroke would increase the amount of air being pumped, but this is being metered anyway...so tuning wouldn't nessessarily be needed for the engine to run.

The catch is that the ECU is actually 1 step behind what the engine is actually doing. This is the trick to tuning ECUs...where real world use the engine reflects the quality of the tune. For the engine to run WELL, there would need to be changes made to both the spark and fuel tables. The best way to do this is with new software, the next best thing is a piggyback ECU like the Moristech Interceptor.

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this is going to be an awesome thread to follow, pei330ci does awesome work

your lightweight car brings back the essence of free speed to fatter and fatter cars
Thank you. There's lots more comming...

Quote:
Originally Posted by Greg@UniqueDesign View Post
About 3.15l.
Want to buy a crank?

Just as a side note, you will need to buy new rods for the 94mm crank. Otherwise, you'll find your pistons crashing into the head. The stock rods on the M54B30 are 145mm, so you'd need 140.6mm rods using stock pistons.
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Old 02-22-2007, 05:45 AM   #16
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I'm assuming the reason you'd need a larger bore is to reduce the amount of power needed to move the crank? Someone explained this to me before... is this right?

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Old 02-22-2007, 06:37 AM   #17
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I'm assuming the reason you'd need a larger bore is to reduce the amount of power needed to move the crank? Someone explained this to me before... is this right?
The bore I listed was what would be needed with the 94mm crank to equal the 3.3l displacement you guessed at. You could run the engine with the stock bore no problem.

You're drawing is correct, but it's hard to quantify with our engine. The best way to prove the theory is to have 2 engines with different deck heights to try the same crank with different rod lengths. Longer rod lengths reduce the rod angle seen by the piston. That said, I've got to believe that BMW is doing something right with the design of the M54, as they garnered "Engine of the year" 5 years in a row with the S54. I'm sticking with the stock bottom end design and upgrading the components used.
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Old 03-05-2007, 01:42 PM   #18
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Since you are looking at the bottom end, look at the oil pump. The oil pump shaft on the 330 will break off. This is because the original design is terrible. There are two options that work. Get an upgraded oil pump from TC Kline or get the BMW Motorsport parts. I suggest the TC Kline pump as it's the most cost effective. I tried an alternate oil pump shaft that had a woodruff key and it worked for a while. After about 6 races I checked it and found out that the key was about to shear off. Luckily, TC just came out with his new shaft and it was the answer. After that, I ran 2 yrs with the same pump and never had a problem. I now have two 330 engines with the BMW Motorsport parts and they work but are a bit overkill for a low revving 330.

The only other things I can think of are overheating and rod bolts. Pretty much, this is a function of someone driving the car when you start to lose coolant or they over rev the engine (by missing a downshift). With the stock bottom end, if you zing it to about 10500rpm, it usually shoots out a couple of rods. As for overheating, even if you use studs, it'll still blow the head gasket and pull the threads out of the block. I've fixed enough of thees motors out of driver error and have seen 90% of the ways to destroy these motors.
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Old 03-20-2007, 08:30 PM   #19
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Thank you very much for the feedback. I've purchased VAC Motorsports' oilpump upgrade kit, was it the VAC piece that you found didn't work? If so, I'll talk to someone about the Motorsport peice.


With regard to the rods...I'll have more to share shortly.

Last edited by PEI330Ci; 03-20-2007 at 08:44 PM.
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Old 03-25-2007, 05:45 PM   #20
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