N54Tech.com - International Turbo Racing Discussion
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codesx codesx is offline
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Car: 2008 335i Vert (E93, N54)
Default Waste Gate Duty Cycles, CAI vs DCI - 10-22-2018, 09:41 AM

Hi all,

Mods in signature for context.

I noticed that on full 3rd gear pulls (2k to 7k), my WGDC were an average of 8 lower after going from the Stock Intake to the Ultimate Racing Cold Air Intake. (similar ambient air temps, though I do not recall the humidity)

I'm wondering if the same is observed when moving from the Stock Intake to the DCI.

I speculate the WGDC are lower as there is less restriction on pulling air in... so the turbos don't have to work as hard to meet target.

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Truthfully, I'm thinking to go to DCI (if I get an upgraded FMIC) for convenience of working under the hood. The UR CAI requires the driver-side tire and cowling to be removed to check/replace the filter. The installation also required cutting of a brace inside the engine which I'm not excited by or aware of prior to it being installed.


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2008 335i Convertible, E93, N54, A/T (190,000+ km)
Wheels: 322 | Tires: R.275/35r18, F.245/40r18
TUNE: JB4/Trebila | 24 PSI | 100% Meth via dual BM5 | 94 Octane
BMS: JB4, Map 6 | WMI | 5" FMIC | OCC | DCI | Cowel Filters
TMAP: 3.5 barr
xHP Stage 3 (v2.0)
VRSF CP | HKS BOV
RB PCV Valve
NGK 5992 Plugs @ .020

Maintenance:
2018 - A/T Replaced | Plugs | Ign Coils | Walnut Blasting
2019 - Index 12 Injectors | VCG | OFHG & O-rings | Alternator w/ Clutch Pulley | Water Pump & TStat
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treehouse treehouse is offline
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Car: 135i
Default 10-23-2018, 09:52 AM

Get the DCI. No reason not to.
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