I just added a qsv but I’m getting the opposite results. I have a stock block vvti s1 cams. Qsv with f1 manifold. S366 1.0 a/r it feels like the motor is chocking until the valve opens.
Interesting as most of what I have read stated going up in CR improves spool. So the fact you went from 8.5:1 to a 10.0:1 on top of going to a stroker I would think there would be a noticeable improvement in spool. But your feeling is the switch to VVTi made more of an improvements than the increase in CR and displacement?Yes.
I went from a 8.5:1 3.0 non-VVTI to 10:1 3.4 VVTi with the same turbo and did some logs without VVTi and the same 80mm turbo didnt spool that much better but when enabling VVTi, 1 bar of boost came 500-750rpm sooner depending on gear and even below that it was a lot more torque.
So I would go VVTi over stroker if I would need to make the pick.