Why would it be towed to some random shop, and not the CTC? Did the pulley back off, or did it fail and separate (as it is a 'decoupling' pulley)

 

rrbob is generally a reliable source of information... but something about this one seems off.
Why would it even be news that a preproduction test car having issues be public information? Let alone "surprising"? Isn't this what all the testing is for, to weed out issues before they hit the market?

 

I find it EXTREMELY hard to believe that Chrysler would have one of their preproduction cars towed to some random garage to be fixed. In fact I can almost gurantee that they would not. So either that is not some random shop, or the story is made up to a degree.

 

Well, here's what we know: That's definitely a Hellcat, one that I don't think we've seen in photos before (I don't remember seeing pix of any in that color), and it's on a flatbed inside a shop.

This does seem very weird, but I have faith that RRB is reporting it as he heard it. RRB, can you try to find out more?

Edited to add: Is it possible that it didn't get taken to CTC because it broke on the weekend, and so the Chrysler folks arranged to stash it in that shop until they could move it to CTC on Monday?

 

What makes you think that is a "random shop" and not part of CTC or a vendor facility?

 

It's a preproduction car, they are out being evaluated so problems like this can be addressed before they make it to the general public.

Mountain out of a molehill.

Mike

 

It's a preproduction car, they are out being evaluated so problems like this can be addressed before they make it to the general public.

Mountain out of a molehill.

Mike

Is anyone making a "mountain" out of it? I don't think so. It's just an interesting thing.

 

Is anyone else surprised they're not using a cogged belt? (Think timing belt.)

 

As far as what I can tell it happened late Friday night while it was being driven around Metro Detroit area. The car was shut off immediately and a towing company was called to come pick it up. The towing company took it back to their shop and left it inside on the flatbed. It was then delivered to CTC in Auburn Hills on Saturday morning. I am waiting for a response from the photographer of the pictures to find out more details, since they are vague. Hopefully we will find out more soon.

 

Is anyone else surprised they're not using a cogged belt? (Think timing belt.)

A Poly V belt is actually fairly normal for this application. Other OEMs use similar setups.

Gilmer belts (cogged) are normally used on high torque aftermarket rootes blower applications.

Mike

 

A Poly V belt is actually fairly normal for this application. Other OEMs use similar setups.

Gilmer belts (cogged) are normally used on high torque aftermarket rootes blower applications.

Mike

aftermarket upgrade potential......

 

This is exactly why they need to take their time, don't let pressure from the public make you rush it to production. They test cars for a reason, glad this happened now and not after people started buying them. What a disaster that would be.

 

It's exactly what I heard, was just in there for the night for storage. Not every department at CTC is open 24 hours.

 

Is anyone else surprised they're not using a cogged belt? (Think timing belt.)

To add...

Poly V belts have great wear resistance, high modulus, low stretch tensile meaning they have excellent strength and dependability,

If you want to look up dimension info out of curiosity, the PK section is the one used for automotive applications. I'm sure I missed a few things or maybe Bob can add/correct me as we recently talked about belts. I asked him a similar question in regards to start/stop systems.

It's a good belt for the application.

aftermarket upgrade potential......

IMHO, no, not really or necessarily.

It's exactly what I heard, was just in there for the night for storage. Not every department at CTC is open 24 hours.

Yeah, not really a big deal.

Mike

 

Those kind of problems most be seen and fixed bythe CTC, no other option, so don't believe another story.

If its a vendor, supplier etc. evrything UNDER the CTC roof, and thats it.

No further comments. !!

 

aftermarket upgrade potential......

Why? I've never seen a toothed "timing belt" ever used on a factory supercharged vehicle before. They're mostly used by hotrodders supercharging their old-school V8, probably because they look cooler than a multi-rib belt.

There's very few automotive supercharger applications that truly need a cogged belt, and most of those are probably the 2000HP+ dragsters, simply because the belt-tension needed to stop a reasonably-sized multi-rib belt from slipping would snap the drive snout right off the blower.

Even motor-alternator start/stop systems use standard multi-rib belts. They just have a special electronic tensioner that rapidly increases the tension for starting, then backs off.

 

Those kind of problems most be seen and fixed bythe CTC, no other option, so don't believe another story.

If its a vendor, supplier etc. evrything UNDER the CTC roof, and thats it.

No further comments. !!

On a related topic...

GM is replacing superchargers on Camaro ZL1, CTS-V, and ZR1 Corvette due to noise/wear issues in the drive assembly for the supercharger. It is my understanding, and my knowledge is very limited, that the revised supercharger has a completely different internal drive that is quieter and more robust.

Do we have any GM guys here that can provide additional info?

Why? I've never seen a toothed "timing belt" ever used on a factory supercharged vehicle before. They're mostly used by hotrodders supercharging their old-school V8, probably because they look cooler than a multi-rib belt.

There's very few automotive supercharger applications that truly need a cogged belt, and most of those are probably the 2000HP+ dragsters, simply because the belt-tension needed to stop a reasonably-sized multi-rib belt from slipping would snap the drive snout right off the blower.

Even motor-alternator start/stop systems use standard multi-rib belts. They just have a special electronic tensioner that rapidly increases the tension for starting, then backs off.

Yes, Poly V is the common belt for the application.

Mike

 

Good info guys. I admittedly know little about superchargers other than the basic ways that they work.

 

Do we have any GM guys here that can provide additional info?

I have an 09 CTS-V, but I don't yet have a lot of info to provide. There has been a lot of talk about it, but information on what GM is actually doing is still sketchy. (They may be in the process of snail-mailing owners.) It's not clear to me whether this is a recall or if they're just extending the warranties to say they'll fix it if and when needed; I suspect the latter. Some reports say it's only 2011 and newer cars that are affected. The issue as I understand it is that the bearing shaft grease gets contaminated and eventually the shaft fails, leading to a loud screeching and then kaboom. Best case is that the supercharger is toast; worst case is that the engine inhales some bits and is also toast. Either way, you'll be driving the loaner for a while.

FWIW I haven't had any of the ominous rattling that supposedly precedes a failure, so I'm not too worried yet. I'll wait to see what shows up in the mail over the next week or two.

 

I have an 09 CTS-V, but I don't yet have a lot of info to provide. There has been a lot of talk about it, but information on what GM is actually doing is still sketchy. (They may be in the process of snail-mailing owners.) It's not clear to me whether this is a recall or if they're just extending the warranties to say they'll fix it if and when needed; I suspect the latter. Some reports say it's only 2011 and newer cars that are affected. The issue as I understand it is that the bearing shaft grease gets contaminated and eventually the shaft fails, leading to a loud screeching and then kaboom. Best case is that the supercharger is toast; worst case is that the engine inhales some bits and is also toast. Either way, you'll be driving the loaner for a while.

FWIW I haven't had any of the ominous rattling that supposedly precedes a failure, so I'm not too worried yet. I'll wait to see what shows up in the mail over the next week or two.

I believe GM uses a different supplier than Chrysler does for their supercharger.

I do know that the GM warranty replacement takes roughly three hours.

Mike

 

I believe GM uses a different supplier than Chrysler does for their supercharger.

I do know that the GM warranty replacement takes roughly three hours.

Mike

Correct re suppliers. The GM superchargers are made by Eaton.

I have heard that replacing the supercharger is more like a 6 to 7 hour job (per the book, at a dealer). Of course if it's two techs, that's a three hour job. Either way, I'll wait and see what GM says.

 

So wait, the sky isn't falling?

 

Correct re suppliers. The GM superchargers are made by Eaton.

I have heard that replacing the supercharger is more like a 6 to 7 hour job (per the book, at a dealer). Of course if it's two techs, that's a three hour job. Either way, I'll wait and see what GM says.

Sorry, I was going by my cousin's time. He is a GM tech.

Good luck with your CTSV. The point of the post was... Things happen

So wait, the sky isn't falling?

 

Proof positive that you don't ever report a news story unless you have ALL the facts!

 

Are we already trying to destroy out Hellcat ?

The media and the competition just need to know about this stupid topic to start the Hell against it.

Guys Cmon, we shouldnt do it, in fact, we cant understand why Dave hasnt deleted this topic, then we shouldnt wonder why sometimes Allpar is not considered by Chrysler.

Cant believe it, we dont know the truth of the facts, but we are here trying to make harm and worst to a magnificent project, and we are the Chrysler fans,nwhat can we expect from all those of who dont like Mopars ?