Need help understanding scan data - ZR-1 Net Registry Forums

Aurora40 · 07-19-2009

Yes, but MAP is the pressure in the manifold. Why would it increase with VE? I'd think if anything, it would be the worst where the VE is highest, since that's where the intake system would be most taxed.

I do have sort of a side question though... Is total airflow highest at the torque peak? I realize each cylinder is filling the most completely, but that event is happening less frequently than at higher RPMs. If I were to guess, I'd think the total airflow would be highest at the power peak, but I'm just guessing.

Edit: Also, Dominic, that's a good idea about looking at the MAP with the engine off. It's funny, but that never occurred to me. I always tried to look at it at WOT at a low RPM, figuring that the intake would be pretty close to atmospheric there. But now that you say that, it seems so obvious.

07-19-2009	#11
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: Need help understanding scan data Yes, but MAP is the pressure in the manifold. Why would it increase with VE? I'd think if anything, it would be the worst where the VE is highest, since that's where the intake system would be most taxed. I do have sort of a side question though... Is total airflow highest at the torque peak? I realize each cylinder is filling the most completely, but that event is happening less frequently than at higher RPMs. If I were to guess, I'd think the total airflow would be highest at the power peak, but I'm just guessing. Edit: Also, Dominic, that's a good idea about looking at the MAP with the engine off. It's funny, but that never occurred to me. I always tried to look at it at WOT at a low RPM, figuring that the intake would be pretty close to atmospheric there. But now that you say that, it seems so obvious. __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] Last edited by Aurora40; 07-19-2009 at 11:48 AM.