Doesn't sound like a blown apex seal. Sounds like a bad corner or side seal.
Sucks.

Imagine the sense of "waiting for the other shoe" one has while tracking at 14 PSI.
Tune before you track.

 

/\ i did - only it seems like at the track everything changes .

 

Hmm. That's bad.
I don't have that issue. I wonder what is changing.

 

my tuning was at night - a lot cooler . I was running into a misfire problem then as well so I turned down the boost till it came right . At the track It was maybe 10degC warmer and I don't think i had tested wot runs in 2nd gear which was where the biggest issues were .

 

Hmm. No work on the temp correction factors?

 

No .
I think i just don't know enough to tune at higher psi . The thing was running great until i found a way to raise the boost after 6500 . That was what put me out of my depth ....

 

h20 temps stable?? but i agree that the opening of the port at 6200 changed all the rules.

and i really will not comment on tuning as i understand the concepts, but that is all...

and brett i have stuff if you need it..

beers

 

Have you pulled the plugs and listened to the compression cycle?

 

no - I've stayed away from the car since i realised what i did

i'll check that tommorrow

 

that was one positive from the day - water temps never went over 99C . That 2nd Rad really does work .....

Not sure what stuff i need yet - i need to focus on other stuff for a while like making the money to fix it for example

 

Get in there and do it!

I always feel better if I dive right into the forensics after I break something.

 

OK - front rotor is good
rear rotor - one good compression two weak

Motor is toast

 

Damn man; sucks to hear...

At least you can build one real nice now - you know how Ray is always complaining about factory seal tolerances.

 

Damn Brett, that sucks. Wonder if your IATs were just too hot? Your compression issue sounds like an Apex seal. Hopefully it didn't damage the housing and you can save those.

 

oh **** Brett, that really sucks! Sorry to hear about the busted engine, hope you can get it fixed soon.

 

thanks for the encouragment guys

 

maybe we should combine our motor together lol it should work

my front housing with your front housing = one good engine.

that really sucks how you f***ed your seal ay. it was gr8 when you drove me on private road.



that pic is allsome

 

ok,

sounds kinda dirty!

hey, but what do i know?

beers

 

Sorry to hear, Brett.
Been there, done that.
Jump in with both feet - it gets easier and better each time you push it just a little too far.

 

Sorry for the loss. I know you worked hard at it to get it going. Sad when something like this happens.

 

Here is a log from my track day showing wot through 3rd and fourth - just for you Swoope

Only concerned with AFR under 100% throttle here
maximum MAF in 3rd was 310g/s @ 7200 rpm
Maximum exhaust temp 970 deg C
You can clearly see the spike from the AUX valve opening - circled

* Note how the spike changes position in the higher gear
*Also how the AFR gets richer in the higher gear
*In 2nd the afrs were even leaner

So The problems i was having as i remember it :
*I could feel a stumble in third gear as we went through the ports opening - not at all in higher gears
* In 2nd gear It was really bad
*When i opened the ports and went back to 7psi for one session all the problems dissappeared
*Next session after that I upped the boost again (ports still open) and that is the one that killed my motor .
* So the ports were open and i was still getting bad misfires in 2nd above about 6800


My conclusion about what killed it:

I think in 2nd gear (and 3rd to a lesser extent) I was running too lean for elevated boost levels . So I need to tune for around 11.5-12 afr in 2nd and the higher gears will take care of themselves .

 

so what are you going to do fix the car ? or go for gold and buy 20b.

well at least if you get a new motor i can polish it

 

While down at the dealers to see about a rebuild I managed to wangle a drive in a 2009 .
My impression - soooooooooo slow I could hardly believe it . I'm positive even my NA would have creamed it . Handling felt more precise but than my 03 but overall the car felt more like a luxury car than a sports car .

 

lol they look nice. so what happened to the about the rebuild ? how much did they say it will cost to get it rebuild ?

 

Brett -

What does your leading/trailing ignition advance look like in the range where the hesitation was and the range where you suspect the breakage occurred?

(The actual numbers.)