Quote:
Originally Posted by tranzformer
I was thinking the same. I know many 6 and 8 cylinder cars come with true dual exhausts. But are there any 4's that come with a true dual exhaust from the factory?
|
i think any inline engine that runs a true dual is kinda retarded, because it has a single exhaust bank. I don't think any 4s come with true duals or any flat-4s for that matter even with 2 exhaust banks.
For small engines like the FB20 i don't believe there are enough exhaust gases being pushed out to see any more gains on a true dual setup vs a single exit on a street car. Just added weight.
But once we get to a level of performance achieved in which fuel and engine tuning are more fickle and demanding, a true duals setup helps further monitor engine performance via 2 EGTs or 2 WO2, and provides additional power to each bank separately. But at that point its more like track car status.
Only reason why rotaries benefit from a true dual setup despite being a 1.3 liter is that they physically push an equivalent gas volume of a 2.6L v6.