[robbo1987*2.3*]

this is the second time this has happened to my motor. # 2 piston is missing a big chunk wtf???!!! this is th second time this has happened to me im using all stock turbo bottom end parts only thing done to the motor is head studs, cometic m.l.s. thats been retorqued 4 times or added assurance lol, i blew my t3 out and stuc an ihi on it for he time being actually scheduled to get the t3 back tody fro the shop lol go figure, light port work on the entire topend.


i know these motors are tuff from the factory as far as the bottom end goes why does it keep chunking pistons??????? 15 lbs of boost daily driven street car that has be lw 13 i dunno imma fix it because i love my carn all but im just wonderin whats the deal with the pistons?????

n e 1 eles ever had this problem just wondering


robbo

[Flyin2.3]

Sounds like detonation to me. 15# really isn't a lot of boost if you have an intercooler but something is causing it.

Broken off out by the rings? Any speckles on the spark plugs? Whats your timing set at? Fuel octane rating? Have an IC? What computer/VAM/injectors? Turbo or n/a head? Any more info would be helpfull.

[robbo1987*2.3*]

they keep peeling up the top ringland/guide whatever you wanna call it right against the cylinder wall. Its all good tho got a fresh longblock with my t3 that i got back they put 360degree thrust bearings in it with upgraded wheels from and back. a 3 inch down pipe that has the 5 bolt flange made into ito it( not a stock neck cut and reworked it came off a precision that was mounted in a 2.3 turbo stang on a stock e6 its purdy lol)
the head has the roller cam with light port work but stock valves, a set of 42 lb injectors, a 150lph pump ajustable regulator. but all stock ecu and im still running the vam. volvo front mount also

imma take it to my tuner guy he said that he can work with the setup that i have he is a well known guy in richmond the call him mike he drives a saleen notch that has a turbo 32 valve cobra motor stuffed in it i can remember his website of teh top of my head though ill find it and post it up he does really good work thats what matters to me lol ne ways i will keep you guys posted on what happes with it all later

robbo

[Flyin2.3]

The only thing I see that stands out is the fuel pump. 150lph seems a bit small, most run a 255lph high pressure pump. That could easily be causing a lean condition/detonation.