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Old 02-20-2013, 09:44 PM   #1
johntrhodes81
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S54 Block + ESS Twinscrew

I keep having ideas of mating an S54 long block and an ESS twinscrew. Not sure if others have thought of this. As you know the twinscrew normally connects to the M52TU/M54. My thought is build an adapter plate sort of like this, but in reverse. http://forums.bimmerforums.com/forum/showthread.php?t=1422245

So the thought is to use the M54 dme and ESS system with the S54 long block. Most of the engine electronic are on these pieces and the oil filter housing which could be moved over to the S54 block.
The vanos control is different but the Seattle Circuit controller could be used as the go between.

Also the S54 would need a set of low compression pistons since twinscrews don't like high compression. Probably some S54 supercharger cams would be good as well.

I realize that eliminating the individual throttle bodies from the S54 would be a negative for some but my car has a M54b25 (MS45.1 DME) and a TS2 and was thinking about how I can add an S54 to the mix in the future, when I need a new engine.

Obviously tuning this would be an issue.

Thoughts?
John
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Old 02-20-2013, 11:25 PM   #2
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This just seems way too complicated.
If you are going to touch the bottom end you might as well build your b25 with b30 crank and low compression pistons. Get the ESS TS3 tune and you are done. It would be better to downgrade your DME to MS43 but ESS did an MS45 tune for stage3.

But back to your crazy idea.
What does the S54 have that M54 doesn't? Stronger internals - not really that important since you will be upgrading them anyway. Different valvetrain to allow it to rev higher (this is really where the extra power comes from). ITBs - you would be losing that advantage.

So, if you could find the way to make the M54 rev to 8k it would be as good as the S54.
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Old 02-21-2013, 07:13 AM   #3
johntrhodes81
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It doesn't seem that complicated to me. Maybe I am crazy. To me the S54 seems to have alot of advantages:
Iron Block, Better for boost, (better head studs)
Head flows better than M54
More Displacement

My thoughts.
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Old 02-21-2013, 07:20 AM   #4
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sell your engine and SC, buy a full s54 and the MaxPSI turbo kit?

or do a s62 swap
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Old 02-21-2013, 08:30 AM   #5
Twin_Turbo_S54
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a pair of GT22 turbos will make much more boost and torque compared to a twin screw system.

I have a S50 B32 with twin GT22s and the low end torque / response is amazing.
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Old 02-21-2013, 09:41 AM   #6
PEI330Ci
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Quote:
Originally Posted by johntrhodes81 View Post
I keep having ideas of mating an S54 long block and an ESS twinscrew. Not sure if others have thought of this. As you know the twinscrew normally connects to the M52TU/M54. My thought is build an adapter plate sort of like this, but in reverse. http://forums.bimmerforums.com/forum/showthread.php?t=1422245

So the thought is to use the M54 dme and ESS system with the S54 long block. Most of the engine electronic are on these pieces and the oil filter housing which could be moved over to the S54 block.
The vanos control is different but the Seattle Circuit controller could be used as the go between.

Also the S54 would need a set of low compression pistons since twinscrews don't like high compression. Probably some S54 supercharger cams would be good as well.

I realize that eliminating the individual throttle bodies from the S54 would be a negative for some but my car has a M54b25 (MS45.1 DME) and a TS2 and was thinking about how I can add an S54 to the mix in the future, when I need a new engine.

Obviously tuning this would be an issue.

Thoughts?
John
Unless you are sitting on a really big pile of cash, and have a lot of time to either do this yourself, or coach an experienced fabricator through the process, this is a bad idea.

ESS tuning has already tried to do a TS kit for the S54..and ran into problems....

Last edited by PEI330Ci; 02-21-2013 at 09:42 AM. Reason: Auto-save 1361461354
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Old 02-21-2013, 10:32 AM   #7
lab rat
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Quote:
Originally Posted by johntrhodes81 View Post
It doesn't seem that complicated to me. Maybe I am crazy. To me the S54 seems to have alot of advantages:
Iron Block, Better for boost, (better head studs)
Head flows better than M54
More Displacement

My thoughts.
Iron block - unless you are going for >500whp it's just more weight
Head studs - you'll have the head off, head studs is an easy upgrade
Better flow - maybe, I think most of it comes from the ITBs
Displacement - it's mainly bore (weaker walls, compensated by iron block)

Again, I'm not trying to discourage you, it would be a cool project but as PEI330 said it would be crazy expensive.
And it looks to me like you are trying to save money by holding onto your TS2. Saving money and doing something that has never been done doesn't mix.

You can have >400whp wagon by buying b30 crank, TS3 internals and FI cams. That's about $8K.
You could sell your SC (3-4K maybe?) and put the money towards a good turbo setup. But to make more power than TS3 you will need to upgrade the internals as well so the total cost would be likely even more.
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