Originally posted by SiR-DC2
Shiat!!!
Simple...what make more power???
B18B 9.2 cr 8lbs
B16A 10.2 cr 8lbs
B18C 10.0 cr 8lbs
B18C5 10.6 cr 8lbs
??????????????????
The damn B18C5! Why, because compression = power
At 8 psi:
b16's boosted compression ratio: 15.2
b18b's boosted compression ratio: 13.6
b18c's boosted compression ratio: 14.8
b18c5's boosted compression ratio: 15.8
At 12 psi:
b18b's boosted compression ratio: 15.8
What's stopping the b18b from running 12 pounds of boost? Nothing. That will leave it will the exact same boosted compression ratio (though the b18c5 will have a lower dynamic compression ratio), at which point it will experience exactly the same stresses on the engine. AND the b18b has more displacement, will require less tuning, and less fuel at idle and low revs.
Price difference between b18c5 and b18b: $3000+
Price difference between turbo designed for 8 psi and 12 psi on a b18: $0.
The point being, as luti said previously, for any application you can run either A) high boost and low static compression or B) low boost and high static compression with exactly the same effects.