[h8louzn]

Originally Posted by lluciano77

He put a bigger turbo on then the original. It was running low 11s.

Wow, Can't belive what I see.
We are talking about compression ratio not times!

[GoneNova/406]

i have a 406,10.5 c.r. and wanted to be able to use 87-89 octane because i figure it will get worse before it gets better so i built another 406 with 9.4 c.r. 64 cc combution chamber and a magnum 280 comp cams 1.6 rockers at 512/512 lift and am running 87 octane.runs great if this helps.i think you should increase your c.r. some to about 9-1. to run that cam.you may just have to try it.