project cars issue noticed

hi guys sorry not been about much recently verything came to a stop and no sim building or messing about for me :-(
but found some time yesterday to fire it up from months of no use and decided to try set project cars up better on my dk2 with a gtx970.
what i have noticed is i could begiune to run graphices reasonable at 75fps with abit of messing about and all was good, but as soon as i fired up the simtools and motion running i lost 25fps and more and the rift just glitched bad i set the graphics to low and still had the odd issues and was harder to see then as the graphics was rubbish.

any ideas is it tjust the system trying to run too much as project cars is a killer and it can not run both. i feel its to do with the shared memory you need on as when i set that on with out motin on it dropped in the frames similare.

What are your pc specs?

fx8350
msi gtx 970 4g
16g memory
ssd sytem drive
runs great without the motion on dk2 some high and ultra settings running.
but soon as shared and motion is selected i lose the fps.

have you tried it with and without shared running and simtools off, i am running the rift and i can have good settings on the graphices and be stable on brands hatch to which all testing has been done and is very happy sat at 75fps but soon as shared is selected it drops the frames and its very glitchy turn it all off motion side and it goes back to 75fps round whole track without touching graphics and lowering it all.
even if i put grphics all on low to gain as much as i can i still get issues with the motion on ? very strange losing so much just running the motion.

what i had noticed is i had everything on low for graphics as i have always ran motion on the game.
had to do that to get any kind of lap from it at 75fps and was only in prictice could not run any others cars.
as i have not bee about for awhile i had some time and was playing about with project cars after reading about the rift stuff so alterd the xml file and the vsync trick.
i ran it then but i had not put the moition on so sat messing with graphics got it to threshold on the system for 75fps then ran great looked good too, but then i thought wow thats it switched the motion on and boom 50-60fps.
turned it off to test again with grphics settings and boom 75fps.
i shut down simtools so it was not in the back ground and still 75fps.
but then i turned the shared memory that runs the simtools for the game to work motion and boom 50-60fps again so seems me selecting shared is where the issue is.
i think simtools is fine but its what is wrong when i switch the shared on so it works is the issue.

Pcars, well there's your problem.

lol i no what ya mean but aint too bad but great with the rift. not tried iracing yet since updates or assetto corsa as running sdk 0.8 on the rift. ive not been about so can not remember anything any more what to do ! lol
id be well happy to sort it out.
if i get time will fire it up again over weekend and try assetto corsa as i get rubbisj fps on that too.