Anyone use Felpro Permatoque MLS 1075-1 Gaskets on a blower Motor? Lasted 2 hours, gasket blew and melted another piston. Was just rebuilt due to same problem but had Felpro 17048 gaskets. At a loss of what to do. Thanks.

Those are very good gaskets. If you are blowing them that easily, you have another problem. Probably detonation but maybe a warped cylinder head or deck surface or improper torque.

The engine builder was suppose to check the deck and heads before he put it together, not sure about detonation, is there a way to find out?

Where did the gasket let go?

Between the clyinders

What bore, what heads, what compression, how much timing?

540 Merlin, bored 30, edelbrock marine heads, 28 degrees timing, same piston melted starboard side 3rd back from front, heads on different sides now.

I ran felpro marine gaskets for over 120 hours w/750 hp blown 540 w/merlin heads,ran felpro marine gaskets w/945 hp on 540 w/afr heads on merlin 2 block,fire ring was just starting to fail on gasket just over 100 hours and am now running mls felpro's on blown 540 w/ dart block and afr heads over 1000 hp. You have some kinda other problem ,most likely something leaning out that cylinder,has nothing to do with the kind of head gasket your using unless the block is really un-even near that cylinder,Smitty

Sounds like detonation or a lean condition. Was it ever dynoed???

did you do a plug check ?? sounds lean to me...also did you stud the heads ? carefull on some head block combo's and the head bolts bottoming out not actually torquing the head down...how much boost ? Rob