What is a good compression ratio for a b20 block with a b16 head for boost. Maybe 11.1 or 10.1, I want my turbo to be responsive and not have any turbo lag. Here is how I would want my setup, a b20 dart block with a 2000 b16a2 head with je pistons and eagle rods with an HKS head gasket, precision t3/t4 turbo. The 11.1 compression ratio will problaby make my turbo spool up alot faster than a lower compression ratio like 9.1, but if I go with the 9.1 compression ratio I could boost more but it would have some bit of a lag right. So what would be a good compression ratio for me, im not really sure how much im going to be boosting maybe around 10psi daily driven. I have a friend who has a itr motor boosting 10psi with a compression ratio of 13.1, I know its high but dam can that car move and its not even sleeved. So 11.1 should be fine for me and at the tracks I would problaby raise the boost to 15psi. So please tell me what you think.

 

it could b done, but wit alot of tunning, and u wont be able 2 run 15psi wit a 11.1:1 cr, that may last a few runs. With the torque ur going 2 b making u will not have that much turbo lag anyway. The highest i would run at 15psi would b 10.1:0 on a built motor and it would respond great, though alot of people have stock blocks making 300+ with a 10.1 cr, but wit lots of tunning. What kind of numbers u wat, lag kind of helps alittle when u make alot of torque, cause u wont burn tires as much. Wit a biult block and a good setup, u should have full boost by 3800-4000 and make power all the way 2 8500rpm on a built motor. So make sure u know ur power goals before u buy parts.