Wastegate venting

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03-05-2008, 07:14 PM

#31

parish8

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Quote:

Originally Posted by 4.8T

well what is the ggggrrrr or bbbbrrrr kind of a farting sound it the best i can explain it. my tahoe was making this sound at higher boost levels when it did it, it felt like i lost power.

was it doing this while at wot?

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03-05-2008, 07:17 PM

#32

TURBHOE

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50-75% i would say. not quite wot. i went wot once and it didn't do it at all. and a few runs after that it didn't but then it started doing it. here is my thread so i don't hijack this one. https://www.performancetrucks.net/fo...d.php?t=413013

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03-05-2008, 07:21 PM

#33

parish8

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that would be your bov or compresor surge.

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03-05-2008, 07:45 PM

#34

TURBHOE

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well, the bov makes a woowooowoo sound. so maybe compressor surge but the turbo is only a 66.5mm. surly its not to big. or does it appear to be too big if your at half throttle and 7-10psi. actualy 40-50% throtle.

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03-05-2008, 07:48 PM

#35

1BadAction

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the turbos go woo WOOOOO

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03-05-2008, 07:52 PM

#36

TURBHOE

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i remember that vid it was funny as hell. but my bov does go woowoowoowoo with a bit of wooossshhhhh in there too.

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03-05-2008, 08:03 PM

#37

parish8

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i dont know for sure what that sound is but i have had it happen before. something about mid throttle. you might be able to tighten up or loosen your bov spring but then again that may not help.

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03-12-2008, 12:10 AM

#38

cpelton

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i plumed mine into its own 3" exhaust tip out the side of the truck so it looks like I have dual side exit exhaust, really one is wastegate, one is exhaust. It took some creative expansions but it looks awesome and is loud as hell. Only giveaway is if I dont keep them clean looks like one bank is burning oil