Has anyone had a warranty claim denied? Seized engine! Pics of teardown added 6/5

[DJCarbine]

I hope if this issue comes up with my car, they will not try to blame the supercharger on it.

[Gords_zenith]

Also, another piece of the puzzle that I remembered last night at work. When I dyno'd my car completely stock, (btw it put down 172 whp, 143 wtq on 94, on a dynojet) the operator noticed that A/F went super rich in the last 500 rpms down to 10:1! He said this is very unheard of even in his built supercharged or turbo'd mustangs. So to me this maybe suggest that toyabaru knew about this and simply tried to hide the detonation by giving more fuel. If anyone else can chime in on this.

[smbstyle]

Originally Posted by Gords_zenith

Also, another piece of the puzzle that I remembered last night at work. When I dyno'd my car completely stock, (btw it put down 172 whp, 143 wtq on 94, on a dynojet) the operator noticed that A/F went super rich in the last 500 rpms down to 10:1! He said this is very unheard of even in his built supercharged or turbo'd mustangs. So to me this maybe suggest that toyabaru knew about this and simply tried to hide the detonation by giving more fuel. If anyone else can chime in on this.

just my opinion, but it seems like a fluke; they could fix the detonation if they knew about it just as easily as they could add fuel to the upper RPM range.

[Gords_zenith]

Originally Posted by smbstyle

just my opinion, but it seems like a fluke; they could fix the detonation if they knew about it just as easily as they could add fuel to the upper RPM range.

Maybe but I got my car in July 2012, with no ecu updates. Also the A/F ratio was completely repeatable in the 4 runs I did.

[CSG Mike]

Originally Posted by Gords_zenith

Also, another piece of the puzzle that I remembered last night at work. When I dyno'd my car completely stock, (btw it put down 172 whp, 143 wtq on 94, on a dynojet) the operator noticed that A/F went super rich in the last 500 rpms down to 10:1! He said this is very unheard of even in his built supercharged or turbo'd mustangs. So to me this maybe suggest that toyabaru knew about this and simply tried to hide the detonation by giving more fuel. If anyone else can chime in on this.

Along with a complete nosedive in torque/hp over 7k rpm. Our dynos when we baselined the car showed the same.

[Mikem53]

Originally Posted by Gords_zenith

Also, another piece of the puzzle that I remembered last night at work. When I dyno'd my car completely stock, (btw it put down 172 whp, 143 wtq on 94, on a dynojet) the operator noticed that A/F went super rich in the last 500 rpms down to 10:1! He said this is very unheard of even in his built supercharged or turbo'd mustangs. So to me this maybe suggest that toyabaru knew about this and simply tried to hide the detonation by giving more fuel. If anyone else can chime in on this.

I thought most cars run rich at WOT and high rpms to avoid detonation?
The OEM is trying to keep EGTs lower by running rich to protect the engine and warranty..
Which is also why you get that drop off in power near the rpm limit. Most tuners lean it out for more power at the risk of detonation.. That's how it worked on my other cars.. I know 10:1 is a bit extreme.. But it should cool things down and keep detonation at bay.. Did you notice any detonation on ur dyno runs?

[Carwhisperer]

Originally Posted by CSG Mike

So we're not the only one to have this happen twice...

Injectors going out yes. Somehow the same motor is still running. My car has only seen streets though, just DD to and fro work.

[xjohnx]

Originally Posted by Carwhisperer

Injectors going out yes. Somehow the same motor is still running.

Mike's first motor was still running too, subaru yanked it for research.

[Carwhisperer]

Originally Posted by Gords_zenith

Maybe but I got my car in July 2012, with no ecu updates. Also the A/F ratio was completely repeatable in the 4 runs I did.

Same month I got mine. Interesting.

[CSG Mike]

Originally Posted by Carwhisperer

Same month I got mine. Interesting.

Ours is also a July car (June production). Although, our 2nd motor obviously isn't from the same time....

[Gords_zenith]

Originally Posted by Mikem53

I thought most cars run rich at WOT and high rpms to avoid detonation?
The OEM is trying to keep EGTs lower by running rich to protect the engine and warranty..
Which is also why you get that drop off in power near the rpm limit. Most tuners lean it out for more power at the risk of detonation.. That's how it worked on my other cars.. I know 10:1 is a bit extreme.. But it should cool things down and keep detonation at bay.. Did you notice any detonation on ur dyno runs?

Agreed. But the point I was trying to make that it seems to be an extreme example of running rich in the last few hundred or so RPMs, and that the developers new about the detonation casued by improper transient ignition table values, so they tried to eliminate it by adding more gas than necessary. Only speculation based on some knowledge of how these engines seem to be designed, based from reading on these forums and my own auto back ground.

[Carwhisperer]

Coincidence? At this point I Just want my DD back, the security guards at my work don't like it when my R8 enters the parking garage.. I tend to use more throttle than necessary.

[Mikem53]

Originally Posted by Gords_zenith

Agreed. But the point I was trying to make that it seems to be an extreme example of running rich in the last few hundred or so RPMs, and that the developers new about the detonation casued by improper transient ignition table values, so they tried to eliminate it by adding more gas than necessary. Only speculation based on some knowledge of how these engines seem to be designed, based from reading on these forums and my own auto back ground.

Ah... Ok.. Thanks for clarifying..

[Gords_zenith]

Originally Posted by Carwhisperer

Coincidence? At this point I Just want my DD back, the security guards at my work don't like it when my R8 enters the parking garage.. I tend to use more throttle than necessary.

Haha at least you have a decent back up ride.
But I've been running 94 pretty much as soon as I got it as the 91 was proving to be knock prone and caused the ecu to pull timing in the heat of summer last year. Btw I haven't tracked my car but have drove it hard on the back roads plenty of times.