Loud whistle/ 90mm fast
 

Installed 90mm FAST and 90mm throttle body on 402 LS2 stroker and have noticed a very distinctive whistle. Is this an air leak?

If it's when the car is moving and not when the car is still- It's the space between the intake and the valley cover. The factory LS6 has a bit of foam to close off the gap.

Hope that helps.

Let me clarify, at speed the air passing between the intake and valley cover makes a "whistle."

Could be a leak...I doubt it though. Feel around with your hand to see if you can feel the leak.

Otherwise you are fine.

As long as you roll around town saying "THE WHISTLES GO WOOOOOOOOOOOO", you'll be just fine :jest:

sneaky pete turbo?

My TPIS 90mm TB whistled. The intake was fine.
Sounded like I had a supercharger.

hell that whistle is probably scaring ppl!!!!! ib be happy with its sounding like a blower