sometimes its the simplest solutions... did the same thing when removing my balancer.

 

Here is a video of a cold start, kind of hard to really get a sense of how loud it is, but around the 2 minute mark it gets warmed up and idle speed drops so you may notice it gets quieter after that.

 

is it the IAC making all the noise?

 

In general or this particular noise? This particular, yea, its all of it. Did it on the turbo setup with a nick williams throttle body as well.

 

What are your cam specs? How much vac do you pull at idle? Is it possible that its a combination of really good vacuum at idle and fairly large displacement that is making the air rip through the IAC?

Have you tried adjusting the throttle blade a touch, or is your IAC count where you want it once warm so you would rather not?

Full disclosure - I SUCK at tuning idle on a DBC set up... so theres that. lol

 

i never use the IAC... so hasnt ever been an issue for me

 

Port the IAC port and see if it quiets is down.

 

Just plug it off. It'll surge, but who cares? They'll all just think its blower surge, and that's cool.

 

Is it the iac or your pcv setup? If it's your iac, how high are your iac counts?

 

holy **** I havent been here in forever and this thread is still going, glad to see this still being messed with, what number setup is this now?!