My 87 can hold 13-15 at redline. This is a stock car save chips and the wastegate shimmed. my cycling valve is drilled too, of course.

-andrew

 

Consider Milledge Engineering. Jon has a kit that is bolt-on for 951's, that develops 360 H/P or thereabouts. His website is JMEngines.com. Jon is on the East coast, not known well in CA. He has a number of his motors on the track at any time. He has impeccable integrity.

 

Maybe my k26/6 isn't a stock 26

Poeple tell me its too fast to be stock.
Still have stock chips though.
i have held more than 15lbs @redline

michigan weather and @ sealevel.