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Forced Induction Turbo, Supercharger, Methanol, Nitrous


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Old 12-28-2015, 11:29 AM   #799
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Originally Posted by shiumai View Post
100% sure it's not unless you think that the installation of a supercharger results in an exhaust shield suddenly loosening on the same day. it doesn't sound like metal clanging. it's more of a plastic rasp than a metal one.
Pulley vibration ?
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Old 12-28-2015, 11:32 AM   #800
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100% sure it's not unless you think that the installation of a supercharger results in an exhaust shield suddenly loosening on the same day. it doesn't sound like metal clanging. it's more of a plastic rasp than a metal one.


I mean the audio is crap, but that sounds metallic to me. Also, if you haven't checked it out.... you can't rule it out. That noise could have always existed and you just now noticed it since you changed something.


You did change the way air moves through your motor as well, so...yes you could have easily changed the exhaust noises.
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Old 12-28-2015, 11:41 AM   #801
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That noise could have always existed and you just now noticed it since you changed something.

You did change the way air moves through your motor as well, so...yes you could have easily changed the exhaust noises.
the noise didn't exist before. i've had the car 3 years and am pretty in tune to all the little noises i hear on a daily basis.
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Old 12-28-2015, 11:45 AM   #802
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the noise didn't exist before. i've had the car 3 years and am pretty in tune to all the little noises i hear on a daily basis.


3 years, 7,000 miles you said earlier correct?
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Old 12-28-2015, 11:45 AM   #803
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the noise didn't exist before. i've had the car 3 years and am pretty in tune to all the little noises i hear on a daily basis.
Try using some Chassis mics placed around and keep moving them until you find exactly where the noise is, Sounds bothersome but if you're anything like me its worth your time.
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Old 12-28-2015, 12:05 PM   #804
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3 years, 7,000 miles you said earlier correct?
yes. by the way, i'm not discounting anything you've suggested - i'm just starting out with the most obvious thing that was changed right before the noise started and going from there.

Last edited by shiumai; 12-28-2015 at 12:21 PM.
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Old 12-28-2015, 12:12 PM   #805
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Originally Posted by Moto-Phil View Post
Try using some Chassis mics placed around and keep moving them until you find exactly where the noise is, Sounds bothersome but if you're anything like me its worth your time.
sitting in the cabin, it sounds like it's coming from the engine compartment, but i do realize that it's sometimes difficult to determine exactly where it's coming from. i considered a few things - intake noise, exhaust noise, belt slipping (squeak?), transmission noise due to more torque, ACVS mentioned here: http://www.ft86club.com/forums/showthread.php?t=95280
etc.

if i found out anything new or edelbrock responds to my PM, i'll let you guys know.
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Old 12-28-2015, 12:58 PM   #806
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Pulley vibration ?
I thought of that as well, so it's definitely on a list of possible sources.
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Old 12-28-2015, 03:34 PM   #807
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from what i heard in the video, the rasp i'm hearing does sound like that. i did mention it to @CSG Mike right after noticing it, and he mentioned that it could be intake/exhaust noise. since i never heard it before (stock exhaust except for nameless axleback) i chalked it up to maybe intake noise. but usually that's more of a whoosh or hiss (that i'm used to). i also thought it could have been vibration of the plastic intake at some kind of resonant frequency or something like that.
as i mentioned above, it's only at WOT near redline, right when the gears change. it's more of a 'mechanical' noise, and is very brief.
paging @itsibarra @Edelbrock LLC
i'd like to take it by edelbrock and give mike ibarra a quick drive around the block to hear it so we can diagnose what it is. if it's normal and doesn't cause harm, no worries, but i'd like to find out for sure.
If that's the noise you're hearing, it's completely normal. You should hear it on the CSG car; its way, way more audible

It's essentially valvetrain noise that you didn't hear before, but is not detrimental to your car at all. It helps the engine breath better at low RPM for more output.
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Old 12-28-2015, 03:52 PM   #808
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If that's the noise you're hearing, it's completely normal. You should hear it on the CSG car; its way, way more audible

It's essentially valvetrain noise that you didn't hear before, but is not detrimental to your car at all. It helps the engine breath better at low RPM for more output.
Thanks for chiming in, Mike. So what made the difference between being able to hear it now vs. before? Also, since I hear it only around 6500 rpm to redline, I wouldn't exactly call that low rpm.
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Old 12-28-2015, 04:31 PM   #809
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Thanks for chiming in, Mike. So what made the difference between being able to hear it now vs. before? Also, since I hear it only around 6500 rpm to redline, I wouldn't exactly call that low rpm.
The amount of cam advance there is, in relation to the ignition phase, which allows the noise to be audible over normal engine operation.
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Old 12-28-2015, 04:43 PM   #810
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Originally Posted by FuzzyFunk View Post
This is from Edelbrock just to clear things up as I was also a little confused:

Once you hit 36k, the limited powertrain warranty will be up, however the supercharger itself has a 3 year warranty which covers any part within the system itself.


I'm at 30k miles now. I was under the impression that if I installed it myself, there would be NO warranty on anything. So I was figuring having a shop install it, but if I do that then I'll pay the quoted $800 install fee for only 6k miles left of warranty on the limited power train, and have a 3 year warranty on the superhcarger itself. Doesn't seem worthwhile to pay a shop to do it then.

But if I install it myself, will I still have the 3 year warranty on the supercharger? I can roll the dice and waive the 6,000 remaining miles of the limited power train warranty to save $800 and installing it myself.
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Old 12-28-2015, 05:33 PM   #811
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The amount of cam advance there is, in relation to the ignition phase, which allows the noise to be audible over normal engine operation.
So i was right but no one listen to me :'(
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Old 12-28-2015, 06:07 PM   #812
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So i was right but no one listen to me :'(
I was listening - i'd like edelbrock to hear it too, just so they can identify it as such and determine its a normal with the addition of the SC.
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