i have a prblem here ive got a fiesta turbo with a stage 3 hybrid turbo on it and have blew 2 pistons at seperate times in the space of a month only boosting 10 psi obv cant cope with the boost any ideas on wat i shud do and wat pistons to use ?

 

What did the pistons look like? have they cracked, or melted?

 

I think once you get a new engine you should take it to someone to get properly mapped before you kill it again!

 

i have just took the head off there and the piston seems fine think it has to be a ring this time...... and for the other boy since the piston was done the last time it has been to AVA to be set up

 

im still getting a compression ratioe of ...90psi...140psi...120psi...140psi wat does any1 rcomend rings ? cheeRS

 

Rings or valves.
tabetha