What I am thinking is that the walls were too thin to begin with and with the light boost it split. They said they had no idea why it would break that bad but the only thing I can come up with is really thin walls. My engine builder wants me to go to a 4.8 just for the wall thickness to get a bulletproof setup. Ive already spent about $16000 on this project and I'm pretty sick of it. I am glad Thompson gave me a warrantied engine but when I sent it back they kept my head dowels($22 in Canada for 4) and they didnt clean out my oil pump or give me a new one. I pulled it apart myself to get the particulate out. Im really not too pleased
And to top it off I'm stuck with a $3500 short block that I cant boost
Last edited by shmiet; 05-12-2014 at 11:09 AM.
Back Alley Motorsports 98 GMC
-5.3l LM7 bored to 5.7l Thompson Motorsports -72mm T4 Magnum Turbo
-TU1 Custom Grind cam(spec speed.inc) -799 heads
-.660" Trick Flow dual valve springs -Forged Probe Pistons 3.902" flat top
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