BigBoost S55 Stage 3 Twin Turbos

doublespaces

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Oct 18, 2016
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2009 E93 335i
Big Boost will be announcing a release and pre-order date next week on a new set of upgraded twin turbos for the S55. We have been told they are stainless investment castings with a 40% larger area in the exhaust turbofold over stock, dual ball bearing and inconel lightweight turbine wheel/shaft. As for power potential, we’re told the compressor wheels will be a billet aluminum for 800-1000 whp or titanium for 1000+ whp.

Perhaps most notably, this fits OEM style downpipes so if you have already invested into after market downpipes that can be re-used. Additionally, they are providing the intakes/chargepipes.


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Dumaurier7

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May 19, 2020
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........But seriously, at the moment I am working to resurrect my F22 after the slight disagreement with the pole! :cry: , now I have become so happy with my E89 and the way the upgraded twins deliver power, my plan is to sell off the BW8474 single and switch over to upgraded S55 twins, I already have the A2W intercooler set up, so I'll be doing my very own homemade version of the F87 M2 comp. :sunglasses:I will be changing the block (it was damaged in the crash) so I will be doing an upgraded block with pistons and rods with the S55 oil pan and oil pumps too.
 
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