[Zigg L1]

Everytime I flip the light switch next to my sink I hear a loud grinding noise coming from underneath. What could it be mister oblivious.
My roto fab fit great and you can hear the Supercharger whine more as expected.

[Gritesh]

Originally Posted by PROMETHEUS

You know this is an old thread.

I realize its an old thread, but I did a search and did not come up with anything newer or where it was being discussed.

I'm just looking to see if this is normal or not, it certainly doesn't seem normal to me, but maybe I am mistaken.

I have had multiple other cars with aftermarket CAI's on them, never a supercharged car, but N/A cars and Turbo Charged Cars and I have never heard this high pitched whistle, it's like a dog whistle.

[staples87]

Originally Posted by Gritesh

I realize its an old thread, but I did a search and did not come up with anything newer or where it was being discussed.

I'm just looking to see if this is normal or not, it certainly doesn't seem normal to me, but maybe I am mistaken.

I have had multiple other cars with aftermarket CAI's on them, never a supercharged car, but N/A cars and Turbo Charged Cars and I have never heard this high pitched whistle, it's like a dog whistle.

I had the same issue you're describing when light to moderate throttle. It was incredibly annoying. I checked all my connections, made sure all the clamps were tight and I was still having the issue. I put the Tony Mamo ported TB on the car and it went away. I honestly think the reason you hear the whistle is because on the stock throttle body there's a lip that air has a tendency to bounce off when the butterfly valve starts to open. Tony completely eliminates this lip when he does his porting.

[F419sr1]

Originally Posted by staples87

I had the same issue you're describing when light to moderate throttle. It was incredibly annoying. I checked all my connections, made sure all the clamps were tight and I was still having the issue. I put the Tony Mamo ported TB on the car and it went away. I honestly think the reason you hear the whistle is because on the stock throttle body there's a lip that air has a tendency to bounce off when the butterfly valve starts to open. Tony completely eliminates this lip when he does his porting.

I posted a thread about the whistle a while back and nobody had any answers for why. I have a NW 103 and at light throttle it loud and annoying. I drive it up to my tuner who says it normal.

[staples87]

Originally Posted by F419sr1

I posted a thread about the whistle a while back and nobody had any answers for why. I have a NW 103 and at light throttle it loud and annoying. I drive it up to my tuner who says it normal.

Wow it's got to be pretty loud if you can still hear it over the kooks full exhaust.

Have you tried replacing the filter? I don't think the Nick Williams has a lip on it?

[F419sr1]

Originally Posted by staples87

Wow it's got to be pretty loud if you can still hear it over the kooks full exhaust.

Have you tried replacing the filter? I don't think the Nick Williams has a lip on it?

It doesn’t have a lip. I was told the whistle is caused by the throttle blade being open just a little. Once I step on it a little more it goes away. Always seems to be right where I’m driving. So I either have to drop a gear or go faster than I wanted to.