My FD is dead again https://www.nopistons.com/forums/pub...1047683358.gif While tuning @ around 6500 in 3rd the rear rotor went. The tuner is well know local tuner and knows what he is doing. Sounds like 2 apex seals are toast, need to do a compression check just for fun. What is weird is the was no knock, running 13.2 A/F and only 1.1-1.2 bar. The timing was 13 with 8 split I believe, have to look a datalogit again. I will be taking the motor apart this week to see what happened, untill then it will be a mystery to me. (Pictures soon) https://www.nopistons.com/forums/pub...1047683561.gif I have though of everything and i can't seem to figure out why it would blow. I have the new mazda 2 piece apexs, and all the toleraces where good when I rebuilt it. (mostly new parts) It was only a mild streetported (ports cleaned up)with opened up exhaust ports.



Was seeing full boost @ 5200 on a t-88 34d, with the 22cm exhaust housing.



Guys have any ideas???

13.2 A/F and only 1.1-1.2 bar is what's wrong... I hope you mean that your cruising A/F was 13.2 and your max boost was 1.1-1.2 ... https://www.nopistons.com/forums/pub...DIR#>/wink.png

your right, oops. Still a little pissed

that sucks man... good luck with that

I'll post my map and maybe one of you can tell me if it looks fishy. It seems like when one FD is fixed and running again, then one has to die at the same time.

What were your a/f's when you blew it? I know that there's a particular car on Okinawa(not my own) that mysteriously destroys apex seals.



If it's any condolensce to you, my entire wiring harness decided to fuse itself to...itself https://www.nopistons.com/forums/pub...IR#>/blink.png I've got a serious wiring nightmare going on in my car...but at least the engine's good(for now) https://www.nopistons.com/forums/pub...1047683329.gif

13.5 a/r is what you would run if you are using something like water injection , without it you should be somewhere between 11.3 and 12 max. On a high performance turbo rotary , you dont hear knock , they just stop working !!!.

My a/f under boost was 11.1 to 11.4 after looking back at the datalogit.

I am going to take it apart today, I pulled it yesterday.



Van if need another harrness I have one, just PM me your address. It seems like it never ends. https://www.nopistons.com/forums/pub...1047683358.gif

How many miles on the motor?

6,000 KLM.