Just bought an 85 Daytona turbo for a song. Has a new long block but a messed up head gasket. (Genius used silicon sealant when installing it) Replaced the gasket and noticed that the pistons were not dished pistons, but are stamped with .050 in. and the pistons do have valve reliefs. Do I need to be concerned with the compression being too high, or does the larger bore and running premium fuel make up for the difference. The head does have the stellite valves btw. Any info would be appreciated. Thanks in advance.
Last edited by Joepoppa1; 12-04-2012 at 10:38 AM..
Not for sure but I've never seen TBI pistons like that in a 2.2. They look like2.5 pistons to me.--Check the stroke. Move a piston to the bottom and measure how far down it is in the hole 4" or so its a 2.5 the 2.2 will check out to about 3 3/4
Sorry... Had some incorrect info on that first thread. Pistons are stamped with ".5mm". The head is already back on, so I can't measure the stroke, but I'm 99.99% sure its a 2.2L not the 2.5. Ive been looking around for another set of pistons, and ebay is the only place I can find em! kinda weary about gettin' em there though.
FWDPerformance sells Venolia forged pistons, TurbosUnleashed sells Wiseco forged pistons for our cars. I bought mine from TU. Haven't run them yet but they are very legit, comes with the ring kits too.