BOV/Surge Valve for ATI
i have the turboxs type h,dont know if its gonna work with my #7 psi procharger until i finnish installing the supercharger.i dont think it is,not enough boost to open it 
maybe some on can help
maybe some on can help 
TECH Senior Member
Joined: Nov 2001
Posts: 11,603
Likes: 0
From: Chi-Town, IL
Its a constant air moving sound at idle, almost can hear it over the charger....it makes a big whoooosh when you start it, while accelerating, makes a big whoosh when you let off...
I never heard the stock one.......
I never heard the stock one.......
Trending Topics
There is nothing you can do to the stock ATI surge valve, unless you vent it to the open air which I would not do..
I have a cool BOV you can her all the time. It's a Apex BOV and it's mounted on my intake box before my MAF. Looks and sounds cool.. Look in my sig to see my BOV..
Clint
I have a cool BOV you can her all the time. It's a Apex BOV and it's mounted on my intake box before my MAF. Looks and sounds cool.. Look in my sig to see my BOV..
Clint
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Thread Starter
TECH Resident
Joined: Mar 2002
Posts: 782
Likes: 0
From: North Las Vegas, NV
Thanks guys. I think it is my BOV going bad. I get 1# of boost at 3300 rpms and then that's it..but it sounds like a lot of air is rushing out.... I'll check it out on Saturday and if it is the problem...I"ll be getting a BOV and back to the dyno. 
Originally Posted by black_yukon
I messed with the adjustment screw before and all it does is adjust how much the butterfly valve opens. Screwing it in will only limit the amount that the valve opens
Originally Posted by HUGGER ORANGE SS
There is nothing you can do to the stock ATI surge valve, unless you vent it to the open air which I would not do..
Clint
Clint
Dark,
I have a Vortech bypass on my car and works great. Stock ATI are crap and have a habit of freezing up. Most of the time it's in the open position so that could explain why it's not making boost. If you don't think it's closing make sure you have a good boost/boost signal going to it from behind the TB. Maybe "T" it off your boost gage.
If they are setup stock I don't think you would hear them over the blower whine. If you vent them to atmosphere then you may. I hear mine only when it's about to close a little chirp. I would think if you hear it whistling that the opening is too small causing a restriction.
TECH Regular
Joined: Nov 2002
Posts: 495
Likes: 0
From: Los Angeles
if all you want is louder, then have the valve open less, but it will restrict the flow. I was thinking maybe knife edging the blade might make it louder too. That way airflow over the blade might be like a whistle. Or you could figure out some way to insert some sort of baffle on the exit side that coud increase noise.
Thread Starter
TECH Resident
Joined: Mar 2002
Posts: 782
Likes: 0
From: North Las Vegas, NV
Originally Posted by I1ULUZ
Why is that?
Dark,
I have a Vortech bypass on my car and works great. Stock ATI are crap and have a habit of freezing up. Most of the time it's in the open position so that could explain why it's not making boost. If you don't think it's closing make sure you have a good boost/boost signal going to it from behind the TB. Maybe "T" it off your boost gage.
If they are setup stock I don't think you would hear them over the blower whine. If you vent them to atmosphere then you may. I hear mine only when it's about to close a little chirp. I would think if you hear it whistling that the opening is too small causing a restriction.
Dark,
I have a Vortech bypass on my car and works great. Stock ATI are crap and have a habit of freezing up. Most of the time it's in the open position so that could explain why it's not making boost. If you don't think it's closing make sure you have a good boost/boost signal going to it from behind the TB. Maybe "T" it off your boost gage.
If they are setup stock I don't think you would hear them over the blower whine. If you vent them to atmosphere then you may. I hear mine only when it's about to close a little chirp. I would think if you hear it whistling that the opening is too small causing a restriction.
Thread Starter
TECH Resident
Joined: Mar 2002
Posts: 782
Likes: 0
From: North Las Vegas, NV
Checked the BOV. Its fine. that means I have a vaccum line that's off somewhere.
I checked all the ones up top(passenger side by the computer) are all hooked up. 1 is for the heater, 1 is to the intake. 3rd is not sure
Up top, they are fine.
The one to the heater controls are good because it works.
The one that goes to the back of the manifold is connected.
The 3rd one, the one I don't know where it goes is the one I'm not sure of.
Other then that.....I don't know what I'm missing.
I checked all the ones up top(passenger side by the computer) are all hooked up. 1 is for the heater, 1 is to the intake. 3rd is not sure
Up top, they are fine.
The one to the heater controls are good because it works.
The one that goes to the back of the manifold is connected.
The 3rd one, the one I don't know where it goes is the one I'm not sure of.
Other then that.....I don't know what I'm missing.
