^ pardon my ignorance...so you’re saying that the torque at sudden peak couldn't cause engine damage? I have a tuner next door to my shop that blamed his rod coming thru his engine case (on a ST miata w/stock internals) on the sudden torque. Again, I don't even pretend to understand how the turbo set ups work but that did make sence to me. But obviously judging by post upon post the tune is absolutely critical as well. Care to elaborate?

 

What I'm saying is...The history of VQ engines blowing on twin turbos are mostly (if not all) related to faulty installation and tune, not sudden torque. Do a search on all the history blown engines over on my350z and you'll see almost all are Greddy, self installed and not tuned properly. Then there's the notorious crank angle sensor wire problem as well that's also assumed to cause many of the blown Greddy TT cars.

 

Interesting...thanks bro.

 

there are a handful over at my350z running over 500whp and tq still on stock internals. id be scared if that was my car, but i guess if you trust the tune, thats good enough.

 

I had tuned the car with less timing [ 15 degree advance after 6000rpm ] While at the track , temps had cooled 30 degree's from earlier , at the end of a run . I believe the stock ECU put back 2 to 4 degree's of timing back in . Which caused detonation and broke off a chunk of the piston and it got lodged in the exhaust valve . This was on stock compression and
9.2psi of boost

 

Sounds ugly, next question, is there anything that can be done to avoid this from happening? Was there another fuel/timing mgt, system in place or just running off of the stock ECU with maybe a re-flash? I am running the F-con SZ but could this sort of thing still happen given the temp. changes etc?

 

Vortech has a piggyback ECU . Timing and fuel control . But it cant control what the stock ECU from adding timing back in . The only way to avoid it is to have the stock ECU flashed to get rid of the aggresive timing map [ I believe ] . Or go with the TurboX Utec .

 

That's good to know. AAM did a ECU Flash as part of my tune, so hopefully this won't be a problem down the road.

 

True. But torque does break things...