Mass flow is a big contributing factor... but transient response IS affected by the strength of the exhaust pulse. If it's JUST about mass flow, then how is it that a 1.3 liter rotary motor can spool a gigantic turbo much faster than a 1.3 liter piston engine could? The exhaust pulse coming out of the port on the rotary is much stronger than the exhaust pulse that comes out of a piston engine's exhaust port. Also, merge collectors take advantage of exhaust pulse as well..

We're talking price on the longblock? Right? I mean, I figure everything else, including manifolds, turbo, etc, would be teh same for BOTH engines. The QR bolts into the Sentra, so there's no added cost there. In reality, if you build the same calibur engine, you might spend a grand more on the QR.. that's about it.

You wouldn't see the SR pulling threads at 5 or 600hp.. I'm talking 4 digit power.. Yes, peak power isn't my main focus either... I'm not some 18 year old kid who's looking for a turbo "fix". But, the facts are the facts... The QR is a better design.

My S13 was the prime example of unuseable power.. I honestly didn't know what I was getting myself into when I built it. On the button, the car was uncontrolable. Off the button, it wasn't fun because of the lag. It broke several transmissions, and sheered all of the teeth off of the pinion once.


Travis