How do i solve this delamination

All of the above, + you can increase the infill % some.
Big solid prints like that are some of the hardest to work with in ABS.

 

If you walk through the mechanics of what's going on, higher printing temps and higher heated bed temps actually make things significantly worse.

It's all about coefficient of thermal expansion (CTE). Materials expand and contract at a certain rate as temperature goes up and down. They also tend to have a shift in expansion/contraction and rate through phase changes (i.e. melting). ABS has a relatively high CTE. This is great for injection molding because it makes the part easier to remove from the mold. Not so good for 3D printing.

ABS doesn't stick to a build plate well unless it's warm. So, you are starting out with a situation where the temperature of the first few layers is 'frozen' in a more expanded state than the layers above it. This is where you get the tendency for the part to peel at the corners from. A lower build plate temperature would make this better. Some people (not me) have reported good results with build plates as low as 85 with ABS slurry. Another solution here is rafts since the bottom layer of the part won't be quite as close to the hot build plate.

Going up through the print. More material (i.e. more layers and more infill) is going to make it worse. As the material cools from printing temp to the temp of the surroundings, it is going to contract. The higher the temp you are laying it down with, the more it wants to contract. More material in the print makes the forces involved in the contraction higher. Solutions for this part of the problem are building in a heated or insulated enclosure or building a full part height skirt to keep more heat in.

I don't really do 5o words or less

 

You've still got all of that residual stress in your parts, so you might find that they start warping or cracking over time.

That being said, polymer processing in general can sometimes be more art than science, so if you've got something that works for you, stick with it! I figure it's always good to at least be aware of the fundamentals so that you know how to best respond when things stop working.

 

The stock hot end is not rated that high. However, I doubt you need to run that high for normal ABS/PLA. Even after replacing my thermistor with the hot end (and the new one reads 'low' which means I have to run the temps hotter) I never have to get above 235 or so for the most stubborn ABS filament.