Boosted Clown shoe Anyone?
imgur.com/a/NORPe
imgur.comPosted Jan 26, 2016, 6:04 PM UTC
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imgur.comgod DAMN that thing looks mean. it's the clown shoe, but like the one from cartoons where it's a nightmare and whatnot. well done, sir. golf clap
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Got a dyno graph? I'd love to see how power builds with your setup.
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I do, i'll have to take a picture of it later, the power band is actually really shockingly smooth.
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I believe it! Do you have any plans to build the bottom end to see what that turbo can do? Seems like that's plenty of power at a boost level that is pretty moderate. What's usually the weak point?
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Yea, a full bottom end (Rods Pistons Mains Head Studs) is in the works. There aren't that many boosted S54s running around, certainly not over the 800hp mark, so we don't really know what the weak point will be. Before HPF went under they started Sleeving the blocks, but had more issues with those than the non-Sleeved ones. So not sure which route I'll go. The car should be good for over 1000 pretty easily.
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I don't think you'd need to sleeve the S54 since it's built with a iron block. Plenty of 2JZs running 1000hp without sleeved blocks. The VANOS hubs and heads lifting will probably be the weak point. There's a reason why people stop around 800whp. HPF guys as well as other guys are having issues keeping the head down from lifting. The VANOS hubs also tend to shatter under OEM stress and no one really knows why (plenty of assumptions).
Have you raced it yet? And what type of cooling do you have? (Yes, I'm trying to get some ideas from you :P )
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What did you do to brace where the rear subframe mounts to the body? I remember hearing that was an issue with a FI M Roadster when they hit the ~450hp mark.
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Aw man this is amazing.
Really wish i bought a Z3M Coupe before they shot up in value.
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Oh man, that's a beautiful car. That engine bay makes me moist.
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I really like what you've done with the exhaust.
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thanks. Turn Downs were the fabricators idea. Hadn't seem them done recently, but I really like it.
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I used to absolutely hate the Clown Shoe when i was younger, these days there aren't many cars i'd rather own. Incredible car OP, very jealous.
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Do you have any videos of it? It looks mean and fast I would love to see a drive-by or two. Beautiful build, I'm super jealous.
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Sounds great. I will give you $5 for it (sorry that's all the cash I have right now)
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Great looking car. Even better motor build :) Debating on ditching the S/C and going turbo myself. This is only tempting me more!
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So much power on such low boost. Gotta love BMW straight sixes.
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Stock Compression
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Sorry, I'm still learning about some of these things; How can a turbocharged engine be running stock compression? Shouldn't the boost pressure increase compression?
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You generally want to lower the compression ratio in the engine if you are running forced induction such as turbo or supercharger, this lowers the chance of pre ignition.
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Compression ratio is a product of the cylinder size/stroke/head. Although you are right, pressure increases in the chamber with forced induction, this is not calculated into compression ratio.
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Compression ratio is the same, but the pressure in combustion chamber is increased with turbo (or supercharger).
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That's because back in the day where people didn't really have as many tuning methods as today, the easiest thing to control detonation was lowering CR. With the advancement of tuning and hardware, you can now get away with higher compression. Look at some of the builds across the board now. 10.1 or 11.1 isn't rare anymore for big power. Throw in meth and ethanol and you no longer need race gas in order to make big power on the street.
That's how the big manufacturers are able to make turbo'd cars that are daily driveable. My N54 335 has a compression ratio of 10.2. I can up the boost by a couple lbs and have 360whp and 400wtq on pump gas with just light bolt ons with very fast spool due to tiny turbos and higher compression.
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That's a death machine. I LOVE IT!
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Maybe a little. Thanks!
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Gorgeous
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Sick
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Any videos of it? Looks mean as all hell, I'm sure it sounds as good too.
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Ahhhhh that thing is amazing. I want one so bad. Beautiful car man.
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Damn... Sexy AF
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10/10 would bang
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The static compression is stock, the dynamic compression is higher since the air is pre compressed.
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Finally finishing up a very long build. Car is on the stock bottom end for the moment, hence the low boost. But everything is built around 1000 to the tire.
It's a 72mm CEA Ball Barring Turbo, AEM Infiniti ECU, 1100 CC Injectors, FSR Cast S54 Turbo Manifold, custom Everything else (Based on the FSR e46 M3 turbo kit, but adjusted for the Mcoupe fitment). Intake Piping is 4", Exhaust is 4" to Dual 3" then though 2 Spintech Mufflers.
Wow that's incredible. I'm so glad you did this build.
Credit where credit is due. http://FSRMotorsports.com
Is this the most badass clown shoe ever?
It's not the highest HP one (yet), but I'd like to think so. It may actually be the highest HP S54 MCoupe though, I'm not sure.
I'm really interested in what ou did to strengthen the chassis at the rear end? Mine was tearing itself apart with the stock engine, and I know most do eventually.
Randy Forbes Kit. The whole Rear Floor gets cut out and new sheet steel welded in. plus new diff hangers, etc. etc.
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610whp on a stock bottom end? Impressive.
It's good for a little more, actually. but we're being conservative.