Critique our setup and tell us whats wrong with our ladies.

So in the photos you will see mine and my mates setup. Its in my spare room in a 2.9m x 1.4m tent. We have 4 600w hps lights running 4 plants. 1 for each light. they are just over 2 weeks into veg that came from clones. We are using General Hydro 3 part nutes. We ph and ppm check our nutes before feeding. We have a reservoir drip feeding every 3 hours into a straight coco medium. Drainage is fine also.

I am guessing it is the heat that is making our plantys curl up this way but I am not sure what we should do in order to rectify this. We have a 10 inch exhaust pulling air through a carbon filter, out of the tent into a vent on the wall. We also have our intake stuck on a boarded up window with a slit for the air to pass through. Also have an oscillating fan in the tent pushing air around. All this can be seen in the photos.

Please help and throw some opinions our way. Cheers guys.

Just realized I cant upload photos right now....Will update as soon as I can. Basically some of the leaves are curling upwards. And also on 1 the leaves are clawing at the tips downward...

What are your lights on temps?

Sounds like it could be the heat. Taco leaves. Tips downward could be high N due to them drinking so much because of the heat.

Obviously lack of pics leaves it to best guesses. But if its heat I would say your problem is in the intake. Your extraction should be up to the job(depending on ambient temps) but if your intake isn't big enough to keep up then your extraction isn't going to be running as well as it could be.
If it were me I would want the extraction vent to be at least the size of the duct (10") I would be checking that vent is free, as in its not a chimney that's capped off. Smoke test will solve that question.
I would want to either increase the slit on the intake or add additional intakes such as passive vents in the floors or doors.
I would be using more circulation fans too.

Anyway, those are my thoughts based upon assumption that its a heat issue. You never gave your temps?

Sorry guys. The temps range between 30-33 celcius so its about 90 faren.

I know that is too high. The exhaust is 10 inch and the intake is only 6. The intake is only duct running from the window to the tent. No fan or anything. I just had a feel of the leaves and there is a slight(very slight) crispiness to them so I would put my money on heat being the issue...