AN 4 T3/T4 Turbo Oil Feed Adapter Flange For Ball Bearing Turbos

#91003784

AN 4 T3/T4 Turbo Oil Feed Adapter Flange For Ball Bearing Turbos

Oil pressure feed adapter compatible with ball bearing equipped turbochargers including T3, T4, T35, T40, T60, T67, T70, and T76
Constructed from CNC machined T6061 billet aluminum, ensuring durability and quality
Features a 4AN male thread fitting for your -4 AN oil supply line and incorporates a 0.042-inch restrictor for optimal oil pressure

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Product Summary

Universal Fit, T3, T4, T35, T40 Turbocharger Style

Oil pressure feed adapter compatible with ball bearing equipped turbochargers including T3, T4, T35, T40, T60, T67, T70, and T76
Constructed from CNC machined T6061 billet aluminum, ensuring durability and quality
Features a 4AN male thread fitting for your -4 AN oil supply line and incorporates a 0.042-inch restrictor for optimal oil pressure
Can be used on journal bearing turbo models by simply drilling out the restrictor hole to match the ID of your -4 AN line
Complete kit includes aluminum adapter, base gasket, and mounting hardware for easy installation

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Key Specs

Turbocharger Style	T3, T4, T35, T40
Turbo Oil Flange Type	Turbo Feed
Oil Flange	Standard T3/T4 Feed
Oil Feed Fitting	-4 AN
Fitting Size 1	-4 AN

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Speedway Motors 91003784 Details

CNC machined from T6061 billet aluminum
AN 4 inlet fitting for use with braided AN 4 oil feed line
Features .042-inch oil restrictor machined into oil feed port
Restrictor can be drilled out for use with journal bearing turbos
Includes base gasket and Allen head cap screw mounting hardware

Ensure Your Ball Bearing Turbo Is Fed the Proper Oil Pressure

When planning your turbo build it is critical to ensure your turbo is fed the proper oil pressure for a long life of lubrication and cooling. Ball bearing turbos use a bearing cartridge in the bearing housing that supports the central shaft that both the turbine wheel and the compressor wheel are mounted to. These bearings must be fed oil from the engine via a fitting on the engine itself that is carried to the turbo’s center housing via a -4 AN braided oil line. This path feeds engine oil to the bearings at whatever pressure your engine’s oil pump is capable of. So, if you are running a high pressure pump you may be providing too much oil to your turbo’s bearings, which can cause oil consumption and leakage from the turbo, not to mention slowing the boost response of the turbo. The fix? An inline turbo restrictor that limits the oil pressure to your turbo.

Adding an oil restrictor to your turbo’s feed line is essential for a ball bearing turbo, but why introduce yet another fitting and potential failure or leak point in your oiling system? Instead, replace your standard turbo oil inlet fitting with our direct fit bolt on adapter that is machined for a standard -4 AN feed line and incorporates the necessary turbo oil pressure restrictor fitting for your turbo’s oil feed? No need to cobble together adapters from the plumbing aisle at your hardware store or try to use an old nitrous jet as a turbo oil restrictor for the oil supply. Simply bolt on our turbo oil restrictor fitting adapter to your turbo and run your AN line. Our integrated .042-inch turbo oil pressure restrictor will bring your engine’s oil pressure into an acceptable range for your ball bearing turbo build without a big stack up of adapters that can crack from vibration or come loose and leak.

Made from T6061 billet aluminum and CNC machined for precision fit and oil flow, our adapter comes ready to install with a high temperature base gasket and Allen head cap screws to secure the inlet adapter to your T3/T4 turbo oil inlet port. Don’t worry if you’re using a journal bearing turbo in your build, you can still incorporate our oil feed turbo fittings in your plans. All you need to do is drill the restrictor port out to approximately .25-inch to match the ID of your -4 AN line and your journal bearing turbo will see plenty of oil. Don’t forget to incorporate a high flow oil drain of at least -10 AN from your turbo back to the engine’s crankcase to further reduce oil pressure issues that can cause low boost, oil leaks, smoking, and other issues within your turbo system. Using the proper inlet and outlet turbo fittings will ensure a long life for your turbo.

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

Speedway Motors 91003784 Specifications

KEY SPECS
MFG. Part #	91003784
Brand	Speedway Motors
Turbocharger Style	T3, T4, T35, T40
Turbo Oil Flange Type	Turbo Feed
Oil Flange	Standard T3/T4 Feed
Oil Feed Fitting	-4 AN
Fitting Size 1	-4 AN
Material Type	6061 Aluminum
Finish	Natural
Hardware Included	Yes
Gasket(s) Included	Yes
Angle	Straight

GENERAL
Oil Feed Fitting Attachment	Male Threads
Oil Flange Thread Pitch	M8 x 1.25
Notes	Restrictor can be drilled out for use with journal bearing turbos
Sold in Quantity	Each

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