[federal]

Originally Posted by arpad_m

Probably should've said this first, but I'm honestly very sorry to hear it, having the engine fail in a way that doesn't obviously and immediately look related to your mods sucks big time

BTW now that I took a better look at your sig, I think you played this Russian roulette even harder, with three or four bullets:
You are past the stock LT1 fuel system's reliable long term delivery capability. Your tune must be fairly aggressive to achieve this much power, or you're pulleyed for additional boost, or both... Even I have at least a voltage booster and my car has nearly 50 hp less than yours at 7.5 psi.

The boost is actually pretty safe, at the altitude I’m at, it’s only pushing 8.5 psi and around 500whp. The 609 is the SAE corrected number. I can see why everyone may think so, but it’s actually quite a low and safe amount of boost because of the altitude here in Colorado. If it were sea level and pushing that much power, then yeah I could absolutely see how it would be a problem

No worries though, I’ll be getting into a ZL1 or possibly on the Hellcat train soon, so no more issues hopefully

[bobby35ny]

This is exactly why my car is stock. I don't want that bill..:(
I know there is 20hp in just a tune but I don't want to give GM that ammunition.
Sucks but true.

[federal]

Originally Posted by bobby35ny

This is exactly why my car is stock. I don't want that bill..:(
I know there is 20hp in just a tune but I don't want to give GM that ammunition.
Sucks but true.

Once I get my new car, I’ll probably leave it stock for a good while. I just couldn’t do the N/A setup here in this almost mile high altitude lol

[MrChrisLS3]

Originally Posted by federal

The plan right now with my shop is to put another stock GM crankshaft back in, replace all 8 bearings obviously, then just go easy on her for a week until I can get it traded in and demodded. I still stand that it was likely a GM defect from factory, as does my mechanic. The car ran over 10k miles with the supercharger, at a very safe boost level for this altitude, and the tune is perfectly fine having come from a tuner who has lots and lots of experience with these 6th gen camaros. I’m not knocking it to the supercharger or the tune, in my opinion. Once the crank is removed and replaced, I might see what is possible with somehow finding out if it was a factory defect - whether that be trying to get a dealership to send it in for analysis, or contacting whichever manufacturer creates the cranks for these engines.

It is really a chicken vs egg argument. Part failure risk is always higher when that much power is added to stock parts. Is it possible that the crank had a manufacturing defect? Yes, it is absolutely possible. It is also possible that despite that defect, at stock power levels, it might have gone another 100K miles before cracking to that point.

I do know this, that if I were the person that bought your car from the dealer where you traded it, with all parties believing it was stock and still covered under warranty, only to find out later that the warranty was void because of a tune, I would be effing livid. Take that thought as you will. But if this were my car, I'm putting a proper crank for boost and selling it private party if I can, to someone that will appreciate the car.

[DaveC113]

Originally Posted by MrChrisLS3

It is really a chicken vs egg argument. Part failure risk is always higher when that much power is added to stock parts. Is it possible that the crank had a manufacturing defect? Yes, it is absolutely possible. It is also possible that despite that defect, at stock power levels, it might have gone another 100K miles before cracking to that point.

I do know this, that if I were the person that bought your car from the dealer where you traded it, with all parties believing it was stock and still covered under warranty, only to find out later that the warranty was void because of a tune, I would be effing livid. Take that thought as you will. But if this were my car, I'm putting a proper crank for boost and selling it private party if I can, to someone that will appreciate the car.

IDK about GM but Subaru will reinstate the warranty if the dealer performs the repair and returns the car to stock. So it's possible the car can be covered under warranty again and I don't think the dealer can sell the car w/o warranty and not give the buyer that info.

[6spdhyperblue]

Makes no sense, now you’re gonna sell it to get a zl1? The motor is out, get a tsp 416 short block forged rotating assembly, boost spec pistons, better than lt4...cheaper

You already have the car and all the parts.

[6spdhyperblue]

Originally Posted by federal

The boost is actually pretty safe, at the altitude I’m at, it’s only pushing 8.5 psi and around 500whp. The 609 is the SAE corrected number. I can see why everyone may think so, but it’s actually quite a low and safe amount of boost because of the altitude here in Colorado. If it were sea level and pushing that much power, then yeah I could absolutely see how it would be a problem

No worries though, I’ll be getting into a ZL1 or possibly on the Hellcat train soon, so no more issues hopefully

You never left the mountains?

[MrChrisLS3]

Originally Posted by DaveC113

IDK about GM but Subaru will reinstate the warranty if the dealer performs the repair and returns the car to stock. So it's possible the car can be covered under warranty again and I don't think the dealer can sell the car w/o warranty and not give the buyer that info.

Ah, yes that is true. But we see this from time to time, where a customer brings a trade in that has been "returned to stock" and makes no mention of the previous modifications or tune, knowing full well that it lower the trade value.

It's not like a dealer is going to run the car back to service in the middle of a car deal, so the deal is done and the trade is taken in. Once a dealer gets in for inspection and discovers this, the car is typically sent off to auction immediately. In a case like this, more often than not, it will cost too much to do whatever is needed to reinstate a warranty, if possible, considering the amount the dealer bought the car for. It's losing proposition.

[federal]

Originally Posted by 6spdhyperblue

You never left the mountains?

Nope, it’s only been here in Colorado, never left the state or even more than 50 miles from where I live.

Originally Posted by MrChrisLS3

Ah, yes that is true. But we see this from time to time, where a customer brings a trade in that has been "returned to stock" and makes no mention of the previous modifications or tune, knowing full well that it lower the trade value.

It's not like a dealer is going to run the car back to service in the middle of a car deal, so the deal is done and the trade is taken in. Once a dealer gets in for inspection and discovers this, the car is typically sent off to auction immediately. In a case like this, more often than not, it will cost too much to do whatever is needed to reinstate a warranty, if possible, considering the amount the dealer bought the car for. It's losing proposition.

The dealership would be the one removing the supercharger anyway, so everyone already knows full and well the status of the vehicle and the fact that it was modified an tuned. I’m not going to leave that part out obviously, especially since it’s them removing it and returning the tune back to factory - what the dealership does from that point is on them, obviously. We can only hope they don’t so anything shady with it in terms of screwing anyone over.

I’m considering selling it private party, in which case I will also be honest about the crankshaft being replaced. For everyone asking why I don’t just modify it further with forged internals, it’s basically just a personal choice. I already feel like I’ve sunk too much money into the car, and just want something that I can leave alone, do regular maintenance, and drive. I’m in a profession where I move around quite a bit, so I especially don’t want to be out of a car for a week, plus a few grand, just to get it retuned or LT4 fueling and internals, all because I moved to a place of lower altitude

[DaveC113]

Originally Posted by MrChrisLS3

Ah, yes that is true. But we see this from time to time, where a customer brings a trade in that has been "returned to stock" and makes no mention of the previous modifications or tune, knowing full well that it lower the trade value.

It's not like a dealer is going to run the car back to service in the middle of a car deal, so the deal is done and the trade is taken in. Once a dealer gets in for inspection and discovers this, the car is typically sent off to auction immediately. In a case like this, more often than not, it will cost too much to do whatever is needed to reinstate a warranty, if possible, considering the amount the dealer bought the car for. It's losing proposition.

Yeah, I can see that... One of the reasons buying used sports cars is a gamble!

[tlk-1997]

This is from my own experience. Here in central Florida we have a high performance friendly Chevy dealership. When I bought my Hot Wheels Camaro, I took it there to register it with my service advisor. I bought a SCT tuner from them and installed it. I have since then installed a Edelbrock 2650 myself and they have serviced it once. They lend vehicles to SCT for development and in return sell it with the tune installed and up charge for it. They told me if I have a issue with anything that I would need to put it back to stock for them to place the claim with GM. They would handle the verbiage.

[Phil 2018SS]

Originally Posted by federal

Nope, it’s only been here in Colorado, never left the state or even more than 50 miles from where I live.



The dealership would be the one removing the supercharger anyway, so everyone already knows full and well the status of the vehicle and the fact that it was modified an tuned. I’m not going to leave that part out obviously, especially since it’s them removing it and returning the tune back to factory - what the dealership does from that point is on them, obviously. We can only hope they don’t so anything shady with it in terms of screwing anyone over.

I’m considering selling it private party, in which case I will also be honest about the crankshaft being replaced. For everyone asking why I don’t just modify it further with forged internals, it’s basically just a personal choice. I already feel like I’ve sunk too much money into the car, and just want something that I can leave alone, do regular maintenance, and drive. I’m in a profession where I move around quite a bit, so I especially don’t want to be out of a car for a week, plus a few grand, just to get it retuned or LT4 fueling and internals, all because I moved to a place of lower altitude

When your front crankshaft seal was replaced did they hold the flywheel when breaking free the crankshaft bolt? If so maybe these new crankshafts can't handle that much twisting stress.

[Staves]

Moral of the story: leave your car stock (minus an axle-back) or be prepared to take a gamble when stuff breaks. One test ride in my SS and I knew it was never getting engine mods. 455hp was/is plenty for me.

[Puddin]

Originally Posted by Phil 2018SS

When your front crankshaft seal was replaced did they hold the flywheel when breaking free the crankshaft bolt? If so maybe these new crankshafts can't handle that much twisting stress.

Doubt that's the reason there are people making way more power than him and are still on a stock crankshaft. This looks like he just got a bad apple from the factory and it finally let go. If he wanted something maintenance free and reliable he should have stayed stock because once you start modding anything can happen whether your fbo or supercharged.