Diesel Tuner's Blog

High Flow Vanes (HFVs) For Variable Geometry Turbos and Why You Need Them

[fa icon="calendar'] Dec 3, 2022 10:19:00 AM / by Ben Lawson posted in Turbo, Stealth, High EGT's, LML Turbo, Turbo Upgrades, Stealth VVT, Stealth 67G2, L5P, VGT, L5D, Nozzle Ring, High Flow Vanes, Turbo Vanes, HFV

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One of the biggest advancements in turbo design since we first started applying them to diesel engines over 70 years ago has been the invention of Variable Geometry Turbos. These turbos utilize a set of movable vanes on the inside of the exhaust housing that allows the actuator to vary the area in which exhaust gasses can pass through them. This allows the exhaust side of the turbo to increase or restrict the flow of exhaust hitting the turbine wheel. In some designs it also changes the flow direction of gasses hitting the exhaust turbine as you can see illustrated below. 


When restricted, the velocity of the exhaust gasses increases which helps spin the turbine faster than a fixed geometry turbo would. This gives the turbo the ability to spool the turbine and compressor wheel up much better than it normally would even with a low volume of exhaust pressure traveling through the system. This helps to spool the turbo at lower RPMs to create boost where it would normally be lacking. This is why variable geometry turbos (VGTs) are such an advancement. They have the ability to significantly reduce turbo lag and provide much better response and turbo efficiency across a range of RPMs. 

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STEALTH TURBO PRICE UPDATE

[fa icon="calendar'] Oct 23, 2017 2:44:13 PM / by Paul Wilson posted in LLY, LML, Cummins Turbo, LBZ, LML Power, Stock Turbo, Stealth 64, LB7, Stealth, LML Performance, LMM, LB7 Turbo, Bolt on turbo, LBZ Turbo, LMM Turbo, LML Turbo, Diesel Turbo Options Duramax, Diesel Turbo Options Cummins, Duramax Turbo, LLY Turbo, Turbo Upgrades, LB7 Turbo Upgrade, 640HP LB7, Stealth 64G2, Stealth VVT, Stealth 64 LML

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We have lowered our MAP pricing on the Stealth 64 Turbo:

Calibrated Power, home of DuramaxTuner.com, has ramped up in-house production of the Stealth Turbo line.  This added capacity and volume of turbo production has provided an opportunity to lower MAP pricing on all Duramax models and allowed the Cummins 5.9L Stealth 64 to be a low price and top quality leader in it's category. 

Our Stealth 64 Turbo's are:

  • Made in the USA!
  • Upgraded, Drop-In Replacement!
  • Quick Spooling with Big POWER!
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