Originally Posted by matty.dc
The $300 extra expense for pistons and added cost later in the tuning process wouldn't be worth it for an extra 5HP you would probably get.
Fair enough but it's more than 5hp.... I've got at least 12whp more in my bored m52 (11.5:1 86.5mm pistons, with s52 cams, m50 intake manifold, pulleys) than an s52 with similar bolt-ons... And the s52 still has more displacement... The other advantage is the crazy amounts of torque.
Anyways I'm not criticizing, just offering my $0.02. Should be a good thread as is!