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How much extra power from colder intake temps?

How much extra power can you get from lowering intake temps with heat shields? Is it worth the hassle?

8 Celsius drop in temperatures gave a 5% increase in engine power.

The Test

I recorded an 8.3 Celcius reduction in air temperature reducing acceleration time by 0.3 seconds, between 115km/h and 140km/h

How much horsepower does that equate to?

Using the StrikeEngine engine power calculator

Engine produced 159PS at 9.3 Celsius and 151PS at 17.7 Celsius.

An 8 Celsius change in temperature gave the engine an extra 5% of power or in this case 8PS.

For such a small change in the intake temps, the difference in power is huge.

This test was on a normally aspirated engine.

Can you imagine how much lower temperatures will have on a turbo vehicle whose intake manifold temperatures are much higher than ambient temperature?

Anything that can be done to lower the temperature of the air entering the engine is a good thing, even if it only lower the temps by a few degrees.

Find performance car parts for your car on ebay

This is in Beta. At the moment only performance brake pads and coilovers are listed

This page was last modified Apr 4, 2023 @ 5:52 pm

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