Render Times go up

Hi, recently i jump from (SR 1.9, vray3.2-max 2015) to (SR 2, vray3,4-max2017), i'm trying to render old scenes Where everything works perfect without noise with bruteforce/bruteforce preset, and render times was 25-30 min per frame... now when i try to render the same scenes I get 45-55 min per frame, even when i check "no" on vray dialog opening old vray scene versions and trying to maintain the same parameters, so i decided to downgrade to (SR 2, vray 3.3 max 2016) with bad results again.
So I am seriously thinking about going back to (SR 1.9, vray 3.2-max 2015 or 2016), I do not know if I missed something or I'm doing something wrong, any ideas? thanks in advance

Juan

PD: all aps are trully licenced.
PD2: yes i try to reset vray params to default and apply preset from start but get 1+ hour render times

Hi, VBAA and Autopilot are already disable

dont know why but in (SR 1.9, vray3.2-max 2015) render only with 1 render pass, but in (SR 2, vray3,4-max2017) render take 2 passes (1 prepass+render pass), in both cases im using bruteforce/bruteforce

Same problem here... was solved disabling the vray 3.3 goodies.

But the sRGB and VBAA buttons don´t affect the render time. The Auto Pilot affects, as the SR own sets seems to be better the new vray engine algorithms at rendertimes.

I also made some tests whithout SR (but with its standard optimized settings configuration: low AA and high global subdivs) with vray 3.3 max2016: With the same settings, enabling and disabling VBAA (by Vlado´s script - renderers.current.twoLevel_adaptiveMethod=0 or 1), the render times was approximately the same (VBAA on and off).

So, i think de VBAA is not an high variable. I think the autopilot is (letting vray and VBAA controling, we have to increase AA subdivs and lower de clr threshold: the result is a pain in render times to catch the same quality with the "vintage" SR settings).

Am I right, Subburb?