What air fuel ratio were you trying to achieve ? what timing are you running ?

7 psi on a stock motor did NOT cause this unless you had rotted gaskets ready to let loose as MANY have ran that much on these mag motors stock. Most these problems lead back to a lean tune, too much timing , insuficcient fuel supply under boost or something like that. Yes, I would pull motor and go thru it but something caused this and you need to figure that out when it goes back in, Smitty

I will pull up my Datalogs tonight and see if i notice anything.

Check to see what your knock sensor was reading, and see what your IAT was. There's a chance the engine was already hurt from running 13:1 under boost with the old MEFI1, and now that it's making some power the head gasket finally let go. Were you running fresh 93 octane, What was your water pressure? Email me over the logs if you want, and I'll take a look.
Hopefully it won't be too bad inside once you get it apart. Give me a call if you need any help.

Thanks, I have a busy day but am hoping to get to the logs tonite.

get a starter om it asap, get the water out, run a compression test, if that happens to ck out ok, fire it up and see what it sounds like, if the engine was in good shape the 7psi should have been fine with proper tuning and fuel system...we've had that conversation...what kind of timing were you at under full boost ? good luck Rob

Motor had 380 hours on it [ATTACH=CONFIG]528415[/ATTACH][ATTACH=CONFIG]528416[/ATTACH][ATTACH=CONFIG]528417[/ATTACH][ATTACH=CONFIG]528418[/ATTACH][ATTACH=CONFIG]528419[/ATTACH]

Had Alex take a look at my Datalogs earlier today. Thought posting them on here might help answer some questions guys were asking me

11.2 at WOT. Datalogs posted above show my timing. Thanks

I don't know anything about the Holley stuff, but it sucks you're having engine problems.