Whistling noise after plenum/TB install?

[uhoh5.0]

I installed a ported and polished FRPP 70mm TB and a ported/polished factory plenum and now I get a whistle at part throttle. I know this thing is sucking in way more air now, as I can feel the difference in power and I can hear my K&N gasping for air, but the whistle has me puzzled? The ford TB has a little hole in the blade, and the factory one didn't. I don't know if its the angle of the throttle blade creating turbulence and a whistle as it passes thru that hole or if there is some vacuum leak or something. I've heard of other people experiencing this but I just wondered if and what the fix is??? Don't say accufab either

 

[DropTopPony]

mine whisteled (c&l) and i checked for leaks....i liked it. Alot of peoples whistle.

 

[jivepepper]

Mine did a little. I think mine it was the way the air went across the edge of the throttle plate during part throttle.

 

[Pennywise2]

mine whisteled (c&l) and i checked for leaks....i liked it. Alot of peoples whistle.

I also have a C&L plenum on my car and I get a whistle at part throttle
and below.I also checked for leaks and I didn't have any.
I know my engine is getting more CFM's but, I have no clue where
the sound is coming from you got me their.
The plenums that are notorious for whistling are the C&L,
Dragon,Accufab,and Trickflow plenums.
I think the whistle sound is cool though.

 

[uhoh5.0]

Jivepepper,
I went to school in Mo'town! Small world!

 

[streethorse]

I also have a 70mm Ford Racing TB, but w/C&L Plenum, I had the set up
on 2 different stangs no whistle at all. I put a new gasket each time,
Be careful to tourqe down the bolts evenly and not overly.

 

[Duke309]

my friend has a 70mm PP tb and plenum and it whistles when you slightly open the TB, its just the air getting sucked in through a small opening.

 

[jivepepper]

Jivepepper,
I went to school in Mo'town! Small world!

\

Cool should come back and visit.

 

[Gearbanger 101]

I installed a ported and polished FRPP 70mm TB

Why would you port and polish your throttle body?