True Compressor Surge

We came across some true compressor surge while performing some testing on one of our racer's drift Skylines. The BOVs were closed during the testing to make sure that they weren't a factor. But this is what true compressor surge is like. Which is characterized by unstable airflow and more boost than the turbo can take at that RPM.

Category:

Autos & Vehicles

Tags:

• skyline
• r33
• nissan
• turbo
• wastegate
• bov
• synapse
• synchronic
• compressor
• surge
• tial
• hks
• greddy
• drift

[synaptic1]

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[ldturbs]

@timramich But it has nothing to do with a BOV.

[golferchin76]

I don't know why some people on the tube are so dump. It says on the description that BOV were closed during the test to make sure it is not the factor.

This is compression surge where the target PSI is higher than the compressor can take, turbulence occurs and compressor stall happens. that 20.5 psi air leaked through the fast spinning compressor in rapid successions, thus the flutter. Maybe it can use a larger compressor/housing. I mean, 20psi is high but not that high.

[richrich27]

probably the reason why is the boost settings or just a faulty dumpvalve. they have to test it out a couple times to see the base of this problem.

[1337xxh4kz]

it seems like a really good idea to do it a few more times....

[rekevin1]

I didn't learn anything from this vid other than your car needs to be tuned by someone that knows what they are doing. Get your car fixed before it blows.

[jakes777777]

put a bigger exhaust housing on it

[timramich]

Surge = stall. It happens in jet engines, too, and they are fully open from one end to the other. A closing throttle plate is NOT compressor surge. BOV flutter is just that, the BOV fluttering.

[guccamain]

@timramich what school did you go to?

[timramich]

@guccamain No, it would be the BOV closing and opening, over and over. The BOV opens, the system loses pressure, it closes, pressure regains, it opens, repeat. BOV flutter has not been proven to be harmful. It happens even at low throttle with little, if any boost. Compressor surge happens when the turbo is being driven by exhaust, not spinning down from inertia and hearing this BOV flutter crap.

[guccamain]

@timramich really? this is a form of CS but the flutter noise people like is compressor surge air flowing backwards over the compressor wheel making a flutter noise