Join Date: Jul 2005
Location: Arvada, Colorado
need some advice on max CR for 10# of boost
I thought I researched all of this enough a year ago when I started buying parts, but things have changed a bit, so here I am asking for help.
I'm trying to assemble a Dart 347 - 4.125" x 3.25" with Ross pistons made for boost, and with a 14.7cc dish. The ported AFR 185 head chamber volume I was counting on was going to be around 62-65 cc, but they "came out" 55cc! That gives me a 10:1 CR instead of 9:1.
So the question is, can I run enough boost at 10:1 to even make a turbo installation worth the trouble, or should I get the compression ratio down at all costs for turbo use? I will be using an AEM EMS which if properly set up will give good control over mixture and timing, but I know you can't just drown the motor in gas to make up for possible detonation.
I'm almost considering going n/a with the 10:1 CR. As you can see I don't have clearly defined HP requirements. I just want one wicked street car.
I seriously appreciate any thoughts.