Turbo chadder / knock?

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Turbo chadder / knock?

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Mitsubishi Forums >> Tech Help and Information >> Nitrous, Super Chargers, & Turbos >> Turbo chadder / knock?

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Turbo chadder / knock? - 8/20/2007 12:43:44 PM

2001gt3.0

Posts: 55
Joined: 6/11/2005
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Is it possible for a turbo to have a severe loud chadder that the owner said was a wastegate that was opening and closing at @ 1 to 2 times every second while under full throttle? The engine and boost had no problem with smooth power delivery, it was just the noise. This car has been sitting for weeks, if not months. This was not a mitsubishi motor but I am just wondering if anyone has came across a problem like this before?

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RE: Turbo chadder / knock? - 8/20/2007 5:55:32 PM

TheAdvocate

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Joined: 8/18/2005
From: Baraboo, WI
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Its not really a chatter if it was that.. Does it sound like it is metal hitting? Because you would hear a wissle or a realeasing of air, which wouldnt really be a chatter..

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RE: Turbo chadder / knock? - 8/20/2007 6:25:14 PM

2001gt3.0

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Joined: 6/11/2005
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It was a metal hitting metal sound. The turbo whine was quite loud with no changing of the pitch, the hitting sound was a really quick tap against metal that was just a bit louder than the turbo whine. The power increase was very linear with no jumps or peaks and no release of air noises.

(in reply to TheAdvocate)

Post #: 3

RE: Turbo chadder / knock? - 8/21/2007 2:53:19 AM

TheAdvocate

Posts: 2312
Joined: 8/18/2005
From: Baraboo, WI
Status: offline

metal on metal could be the head or block.. The turbo may have "death wine" but it wouldnt be making a metal on metal sound.. What kind of car is this on?

_____________________________

-Project 99 GSX-
Built 6 bolt
Crower rods
ross pistons
Built Head
FP3x Cams
Venom Intake
AEM Fuel Rail
850 Injectors
*Looking for Sponsors*

(in reply to 2001gt3.0)

Post #: 4

RE: Turbo chadder / knock? - 8/21/2007 8:25:52 AM

2001gt3.0

Posts: 55
Joined: 6/11/2005
Status: offline

It's a 86 Grand National with the 3.8L turbo/ intercooler motor. It has had a couple of things done to it. ( injectors, empty cat, exhaust, K&N, shift kit and a manual boost control )
I was thinking that some of the guys on this forum has had more experience with turbos than the average car buff and was thinking that the (?) manual boost control might be the problem. It was like someone was under the hood hitting 2 frying pans with a large spoon, while this was going on, it was pulling like mad.
Thanks for you inputs

(in reply to TheAdvocate)

Post #: 5