I took the cat and muffler off and put in a straight through muffler about a year ago. The thing sounds like I'm running an air compressor into the exhaust except when I start it up it will sound like the air's blowing then for one second it stops then starts back again. Is this the EGR that I'm hearing or is it just the normal sound of one of these turbos? I guess what I'm asking is, if I block the EGR will it sound less like a sand blaster?

 

What you are hearing is the VGT.. opening and closing slightly.. Perfectly normal.. You oughta hear mine straight piped hru a 6" stack.. sounds like a REALLY loud hissing noise..

 

You high tech guys with your VGT and EGR.

 

yup it do that noise

 

Pretty much what I figured. Sounds horrible if you ask me, I wish it would sound like it does for that second when it adjusts.

 

You can make it sound like an LB7 at idle with EFILive

 

yup, open up the vanes at idle and itl rumble like its big brother

 

Interesting. Can I still use the Juice and attitude with efi live?

 

HAHAHA thats right

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You can especially if you just have someone tune the vanes down at idle, well maybe would the edge overide the changes to the vane tables? Where in wyoming are you?

 

You could.. but it would be pointless.. since EFI live can do everything and more than any Off the shelf programmer..

EFI Live is the last tuner you will ever need for ANY OBD II equipped GM vehicle.