[The Nightman]

BDS claims that silicone intake boots are worse than the stock boot. Their dyno shows a loss of 6bhp and 2Nm with the Mishimoto silicone hose compared to stock. I suppose this supports the belief that the resonator on the stock boot is a tuned Helmholtz resonator and not a silencer.

"we also conducted a comparative analysis between the silicone hose solution and the stock intake system. Astonishingly, our findings revealed that the silicone alternative actually performed worse than the original resonated tube."

https://bdsmotorsport.co.uk/store-1/...52-intake-boot

Then they go on to push their own product (which seems to also delete the resonator) and unless I'm missing something, they share no evidence that their intake duct is superior other than a bunch of marketing wank that borders on a word salad.



tldr save your money

[MOD.Works]

They are right.
The silicone boot resonates and its shape changes, which slightly affects the air flow. Hard pipe is better, but I don't think the difference is big.

[Jros]

in my case it gave me negative LTFT, i guess the stock Helmholtz resonator kills some resonance / turbulence that affects MAF readings. Using euro airbox.

Switched back to stock resonated tube, noticed more refined intake sound and honestly no difference at all in power or response. But now normal fuel trims.

[Hotter]

So should I replace my silicone intake hose back to stock one?
Anyone else tested this on dyno?

[Tambohamilton]

Originally Posted by The Nightman

tldr save your money

100% agree

[AmuroRay]

Hmmm, I don't know if I agree. I'm sure it was dyno tested to increase power, and when it comes to intakes, I know Diameter of the tube (and length) play a key role. That tube looks to be smaller than the TB diameter.

When I dyno tested a few intakes (AFE, Stock and Injen) the INJEN made the most torque and was 1whp off from peak of the AFE airbox. I should have stuck with it.

[gunnerxq]

There were multiple old dynos that showed the silicone boot had increased power.