Are there any specific symptoms of the needle bearings going out in the m90? I'm getting a lot of noise and although I'm sure the coupler is worn this noise is more excessive whining rather then rocks tumbling.
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11-22-2016
Are there any specific symptoms of the needle bearings going out in the m90? I'm getting a lot of noise and although I'm sure the coupler is worn this noise is more excessive whining rather then rocks tumbling.
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11-22-2016
A whining supercharger .... hmmmmm that's very strange indeed
11-22-2016
Wait it's supposed to whine??
No seriously it's ridiculously loud even at idle.
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11-22-2016
The only way to really narrow it down is to replace the coupler. When mine went out it was covered by the sound of my bad coupler.Originally Posted by suitercrew
Check your oil level in the housing too. Excessive noise can be a large array of things, bad tensioner, bad pulley bearing, bad needle bearing, vacuum leak, etc...
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11-22-2016
I'd rather just go buy another M90 at a junkyard and throw it on.
11-22-2016
Good point! I neglected to mention that's it's a pain in the a** to pull the needle bearing out...
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11-22-2016
Well I used a stethoscope thing and found it's actually the bearing closest to the pulley so I guess I'm looking for a snout rebuild. I'm not gonna go pay 150$ for a supercharger that's used and could have a bearing fail after 100 miles or possibly already have a bad bearing
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11-22-2016
Snout rebuild from ZZP without core charge is 200.00.
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11-22-2016
Ya I'll probably just get one off eBay it's 215 with a 60$ refund when you return the core. And it comes with oil and coupler.
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11-22-2016
Does a bad bearing effect anything though besides being extremely annoying and eventually grenading?
Like would it cause low boost or high outlet temps. Etc?
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11-22-2016
Are you stock pulley or press on hub?
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11-22-2016
Mps hub
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11-22-2016
You can get a gen V for 215...
04 Impala SS Indy:
11-22-2016
Where? Although I'd still need an adaptor plate 60$ and honestly I don't get how a gen 5 is even an upgrade unless your running a really small pulley. Like if it's more efficient and you make the same power on a 3.6 as you would a 3.4 on a gen 3 but you can still only run the 3.6 on the gen 5 with no kr then where exactly a are the gains?
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11-22-2016
The efficiency is the gain. Less heat, more boost, more powah...and errrrybody wants more powah.
11-22-2016
Ya but if your running a 3.4 on a gen 3 you can only run a 3.6 on a gen 5 so if you have to run a smaller pulley then there's no gain
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11-23-2016
Smaller pulley doesn't mean more power if mods won't support it. Because it's more efficient of a supercharger you need to make the rest of the air flow more efficient, i.e. exhaust work or you'll be getting some knock.
04 Impala SS Indy:
11-23-2016
I know that's what I'm saying if a gen 5 puts out the same boost on a 3.6 that a gen 3 puts out on a 3.4 it doesn't matter your not gaining an hp gain because you can only handle so much boost depending on your mods. At best I see how you could gain 5 maybe 10hp by its running cooler but besides that I don't see how your gaining any power
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11-28-2016
if your putting the same volume of air into the engine at less psi of physical boost and lower temps then you are actually stressing the engine less
a larger volume of air at lower temps will make more power than the same volume of air at a high temp and you will be able to put more timing in the engine
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