Proof That Turbo Blankets Dramatically Reduce Engine Bay Heat!

Here at Kool Wrap, we intend to embark on a series of bench tests to evaluate the performance of all of our heat protection products. But while we arrange the equipment to start these tests, we found a great video from the guys at Engineering Explained- a well known Youtube channel-  where they used an Infrared camera and temperature data logger to test the heat generated by their Turbocharged GTi VW with and without a turbo blanket.

They used a Titanium Basalt Turbo Blanket of exactly the same construction as our Kool Wrap blankets. The results were definitely impressive.

The turbocharger without the blanket showed exhaust housing temps up to 500°C and these dropped to 160-200°C with the blanket fitted. This reduced engine bay heat was then shown to reduce the temperatures of nearby coolant hoses, the turbo to intercooler piping, the air intake and turbo oil lubrication line.

Check out the video below. The guys did a great job.

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Do Turbo Blankets Actually Boost Performance?

Kool Wrap Black Silicone Coated Turbo Blanket

Turbo Blankets or Beanies where introduced for 4 key reasons:

  • Reduce under bonnet or hood temperatures to protect fuel lines, hoses and other engine components from heat damage
  • Reduce the chance of injury for mechanics working near hot turbochargers
  • Improve performance by lowering engine bay temperatures and therefore intake air temperatures
  • Increase temperatures of the turbo exhaust housing and therefore accelerate the intake turbine faster, reducing lag and in turn increase boost pressures

Turbo Blankets have no doubt proved themselves to be very popular with turbo car owners, but will a Turbo Blanket really bring on Boost faster?

Luckily for us, graduate research assistant Steffen Bickle at the University of Texas decided to thoroughly investigate this theory.

Click HERE to read his paper.

The short version is, yes, Turbo Blankets or Turbo Beanies definitely do increase exhaust housing temperatures and help to build boost faster.

Steffan Bickle found that …..”With the turbo blanket mounted, the turbocharger shaft speeds exceeded their baseline counterpart for identical engine operating conditions which resulted in increased boost pressures throughout all tested steady state speed-load point”.

He went on to conclude…”The time-to-torque improvement with the PTP Turbo Blanket was significant, especially for the last case, in which we used a simultaneous tip-in of the speed and the load, the time-to-torque improvement was impressive with an instantaneous torque improvement of up to 140 Nm. This led to an acceleration advantage of 250 engine rpm in spite of the fact that the duration was less than 2.5 s for the entire event. The improvement of the turbocharger performance provided this engine performance advantage because the turbocharger spool-up was faster which resulted in a boost pressure advantage of up to 0.3 bar when the PTP Turbo Blanket was mounted”.

I think that we can safely agree that a Turbo Beanie or Turbo Blanket is a very cheap and easy addition to any Turbocharged Car and the benefits are proven.

  • Faster spool up of the turbocharger- less lag
  • Cooler under bonnet or under hood temperatures
  • Potential power gains by reduced engine bay temperatures
  • A safer engine bay for mechanics and enthusiasts

Check our the Kool Wrap range of Turbo Blankets or Beanies


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