Super Street Network

Due to the EU’s Global Data Protection Regulation, our website is currently unavailable to visitors from most European countries. We apologize for this inconvenience and encourage you to visit www.motortrend.com for the latest on new cars, car reviews and news, concept cars and auto show coverage, awards and much more.MOTORTREND.COM
 |   |   |  Turbocharger Heat Shielding - Fact Or Fiction
Subscribe to the Free
Newsletter

Turbocharger Heat Shielding - Fact Or Fiction

Debunking tuning myths.

Luke Munnell
Jan 26, 2011

Testing By Protech Performance and Import Tuner Staff

In the world of aftermarket vehicle modification, products seem to be able to be divided into three camps: those that are added for clear-cut, obvious reasons (turbochargers, performance suspensions, stickier tires, etc.), those that have no performance purpose (engine bay dress-up, vinyl/paint, certain interior accessories, etc.), and some-the same product-we see added for different reasons, depending on who you ask. This month we put one of the latter to the test.

The Claim: Turbocharger heat shielding can increase power and decrease turbo lag.

Turbocharger and manifold heat shielding, usually in the form of coatings, wraps, or blankets, have been promoted for years for their benefits such, of decreasing underhood temperatures-that much is fact. They work. But some will claim adding them significantly increases power and torque output, and decreases spool time compared to using nothing at all.

Impp_1103_03_o+heat_shielding+miata Photo 4/9   |   Turbocharger Heat Shielding - Fact Or Fiction

The theory is simple: Heat is energy, and gas expands more the hotter it becomes. More heat kept in a turbo manifold or inside a turbine housing equates to more pressure (energy) that can be directed through a turbine wheel, improving turbine performance, and subsequently compressor performance, for an increase in overall boost pressure and a decrease in the time it takes to build that pressure.

To test the claim, we collaborated with engine insulation specialists Protech Performance (PTP), and commenced back-to-back testing with a turbocharged Miata and the Dynojet dynamometer and infrared pyrometer of the crew's facility in Austin, TX. The first series of runs was performed with nothing insulating the car's GT35R turbocharger. The second group was done with a PTP blanket (PN FPR03S-003) surrounding the turbine. Both groups of testing involved multiple back-to-back runs, at operating temperature, with the hood closed.

Impp_1103_04_o+heat_shielding+dynograph Photo 5/9   |   Turbocharger Heat Shielding - Fact Or Fiction

Recording temperatures at the turbo compressor inlet and valve cover upon the completion of each run verified that the blanket staved off temperatures, as we knew it would. And as we suspected, power and torque increases-as well as a spool time decreases-were present as well.

The Verdict:
Although the gains weren't humongous, neither was our 1.8L BP Miata engine or its turbocharger. The benefits this simple modification could bring to something like a time-attack RX-7 would likely make it one of the most cost-effective power increasing mods one could make, and as always, the decreased underhood temperatures mean better radiator performance, cooler intake charges, and longer life for vacuum lines and wiring harnesses.

Impp_1103_06_o+heat_shielding+fact Photo 9/9   |   Turbocharger Heat Shielding - Fact Or Fiction

Sources

Protech Performance
512.834.8771
http://www.projectptp.com
By Luke Munnell
324 Articles

BROWSE CARS BY MARKET

MORE HOW TO

With a little bit of time, a whole lot of patience, and some tricks of the trade, even the most noob among us can pull off prepping and painting a car like a pro
Scott TsuneishiFeb 19, 2020
These engine swap checklist considerations should be made before starting any power-plant switcharoo.
Aaron BonkFeb 12, 2020
Important steps for taking any fun FR and turning it into a fishtailing monster
Bob HernandezFeb 11, 2020
All good things come to an end, and in the case of our 2019 Lexus UX200 F Sport project car, that time is now…
Sam DuFeb 10, 2020
After having the interior and engine bay on our '92 Civic project car stripped to make the painting process easier, we thought it would be the perfect time to figure out the brake line and cooling setup.
RodrezFeb 10, 2020
Sponsored Links

SEARCH ARTICLES BY MAKE/MODEL

Search
CLOSE X
BUYER'S GUIDE
SEE THE ALL NEW
NEWS, REVIEWS & SPECS
TO TOP