Thread: supercharger whine

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  1. #21 Re: supercharger whine 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Do you have a boost gauge?

    My guess is that you have an issue with your BBV not closing, err... opening, I forget which way is which with those things.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
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  2. #22 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    i don't have a boost gauge just the one on the DIC. Also is there a way of testing the valve?
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  3. #23 Re: supercharger whine 
    GTP Level Member KeithGTP03's Avatar
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    Does the DIC bars fill up? You can test the valve by holding the BBV lever all the way down while someone gives it throttle and watches the boost on the DIC. If it fills up when you hold it down but doesn't fill up when you're not touching it, replace the BBV. Here is the BBV lever you need to hold down.


    03 GTP...Its got pulleys and stuff.
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  4. #24 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    thanks i will check it out as soon as i can
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  5. #25 Re: supercharger whine 
    GrandPrix Junkie SeanGTP's Avatar
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    Quote Originally Posted by KeithGTP03 View Post
    Does the DIC bars fill up? You can test the valve by holding the BBV lever all the way down while someone gives it throttle and watches the boost on the DIC. If it fills up when you hold it down but doesn't fill up when you're not touching it, replace the BBV. Here is the BBV lever you need to hold down.

    [IMG]http://i1214.photobucket.com/albums/cc486/keithr2213/runner.jpg[/IMG
    Those "bars" are pretty much all throttle position. If you swapped in an N/A engine and went WOT they'd still all light up.
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  6. #26 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    so then what would you suggest?
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  7. #27 Re: supercharger whine 
    SE Level Member 86bcook's Avatar
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    want to sell the 3.4 pulley?
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  8. #28 Re: supercharger whine 
    GTX Level Member blakgtp's Avatar
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    Quote Originally Posted by SeanGTP View Post
    Those "bars" are pretty much all throttle position. If you swapped in an N/A engine and went WOT they'd still all light up.
    not sure about this. when i had a small vacuum leak none of the bars would light. when i found then leak i got most of the bars to light wot
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  9. #29 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    sure but its a zzp modular pulley with no hub.. if interested pm me
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  10. #30 Re: supercharger whine 
    GTP Level Member KeithGTP03's Avatar
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    Quote Originally Posted by SeanGTP View Post
    Those "bars" are pretty much all throttle position. If you swapped in an N/A engine and went WOT they'd still all light up.
    That's incorrect. If that were the case, people would never run across the "half boost" problem. It's usually the BBV, solenoid or a vac leak.

    03 GTP...Its got pulleys and stuff.
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  11. #31 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    I did Ur method and nothing happened to the dic both ways
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  12. #32 Re: supercharger whine 
    I live here. Slick2500's Avatar
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    Okay I know this is going to sound stupid but did you put the belt back on? Or the correct belt? A 3.4 pulley and the stock pulley use different sized belts.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower
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  13. #33 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    Ya I bought a new stock belt for it.. I just did the oil today and it got even quiter lol.. Ii just want to make sure nothing is wrong
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  14. #34 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    sorry for bringing this up again but it still isn't as loud.... i had a 99 that was completely stock and the one i have now(and 01) is a lot quiter and it has a homemade intake on it.. any ideas? from what ik the bbv is still good
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  15. #35 Re: supercharger whine 
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    bigger silencer ports??
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  16. #36 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    Quote Originally Posted by Green97GTP View Post
    bigger silencer ports??
    what do you mean?
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  17. #37 Re: supercharger whine 
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    no filter guy!!! ask a aircraft carrier pilot what happens when dust dirt or debris goes into a jet...as a preventative measure the whole crew goes over the entire deck looking for things that would render an aircraft useless, so to run a boosted engine whit no filter is far from wise
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  18. #38 Re: supercharger whine 
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    hey gtp whine, dude are you certain you power steering isn't a little low. mine whined when i first got it then i put the proper level of fluid
    in it
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  19. #39 Re: supercharger whine 
    I live here. TLSheff's Avatar
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    Quote Originally Posted by Mike Tackett View Post
    hey gtp whine, dude are you certain you power steering isn't a little low. mine whined when i first got it then i put the proper level of fluid in it
    What? The? What did I just read? If the Power Steering was low, the pump would whine, but that would be all the time or while turning. It would have nothing to do with the boost. Did you even read his comments about this?

    OP check for a vacuum leak. Take some B12 Chemtool, or Starting Fluid spray, or something similar and spray it around the connection points on the vacuum lines. Do this while the engine is running, but go point to point slowly. If when you spray a connection point the RPMS go up (engine surges up like someone gave it gas from the spray fumes in the lines) you have a leak there.

    If you can't find any leaks, the BBV is working correctly, you don't have a CEL on, a new clean air filter is installed, I have no idea where to go next. This is a puzzler.

    BTW If you didn't figure it out already.


    Spots circled in red are silencer ports. They allow air to flow thru them to keep the whine down for the Regular Joe's driving the cars daily. If they get plugged off, filled in, etc... it gets much louder, but you would have to carve out alot more to get quieter, and that would probably reduce flow and boost as well. Unlikely unless the previous owner was a wack-job. People usually want to fill them so you can get as much noise from it as possible.

    Good luck.

    Quote Originally Posted by AmericanSoldier View Post
    ...not scanning/monitoring your motor is like bangin a hooker and you just HOPE your not infected.
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  20. #40 Re: supercharger whine 
    GTP Level Member chris99gtp's Avatar
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    right.. does anyone have another method of testing the bbv?? im not sure from what everyone else is saying that the other method is correct or what not because of the legos... maybe im just testing the bbv wrong...
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