I searched the NA forum and found nothing that helped.

Anyways, my question is... is 190psi in each cylinder too much compression for a KA24de? If so, what could be the culprit for such results?

 

fsm calls for 170. the head was probably shaved. run 91 octane and youll be fine

 

I'm just going to have him retest when I go to check out the car. Any other suggestions?

 

does any 1 kno how much i could shave the head on my KA24DE safely because i heard too short and timing chain will be loose and many other headaches and how much gain can i expect.

 

The upper timing chain assembly is located in the upper half of the head....
The bottom timing chain assembly uses timing chain tensioner, tensioners pull the chain tight.
I highly dought milling the head will cause issues with the timing chain. More than likely if you mill to much off the head, you will hacve valve clearance issues........