Hello, I have a quad that broke and swapped frames to a slightly heavier one. This is the only difference i can tell. when i go fly it hovers and flys normal but when i do a forward flip my quad freaks out and i have to kill switch before it goes crazy and crashes somewhere. does anyone know why this would be doing this? I have already recalibrated my FC before flight as well.

can you describe "freaks out" "goes crazy" more?
does it start to climb? rotate over the axies?

Do you have Airmode active? Of not, it could cause your quad to loose control during zero throttle moves like flips.

Just a few checks i would tick off,

On the motor side
-In betaflight, make sure your motors (with your props off) spin up in the correct order such that the motor slider 1 corresponds to the motor 1 on the drawing top left. If not your going to need to do some motor remapping
-Check the direction of the motor corresponds to the direction of the drawing.
-Check that your motors spin up correctly (but don't leave them running fast without a prop for long, i would say not more the half a second)
-Make sure your props are the right way up and are spin in the correct direction.

On the gyro side
-With the accelerometer on, make sure that when you move your quad, it has the same orientation in betaflight on the setup tab. If not, change the orientation of your fc to match the movements.

More information could further some other things to check

okay so more in depth with "Freak Out" is yes rotate over axis when i do a forward roll. it flys perfect motors spinning in correct direction and mapped controls correctly  on take off because i can fly using fpv. i will take it out again tomorrow and make sure that this is what is indeed happening. I only put my quad back together 2 days ago and havent completely isolated my issue. all i know is when i am flying and i climb altitude do a forward roll it freaks out starts spinning to correct itself and i have to kill switch and watch it fall like a dead bird. And also no air mode is not active during this time i only fly acro mode.

Not having Air mode is your problem. Air mode is not a flight mode. You can active in acro mode.

See Oscar's article and JB's video linked below for an explanation of Air Mode. There is no good reason I can think of for flying without it enabled under normal circumstances.

https://oscarliang.com/betaflight-airmode

Need to isolate cause, to find problem.

Is it only flip?
What about roll?
Sharp left/right?

During a flip, PID commands 2 motors to high throttle. If its just throttle, it could be damaged ESC. As itflips and error grows, invokes high D. If you have too high D or too high I with Iterm relax dusabled, it will freak out abd fly away.

But, its just guessing.
Need blackbox log.

go for airmode first, it would be the best and an easy solution.
next to airmode, check all parts about tightness, anything loosen; arms, stack...
do you have a capacitator added? are the leads still conected?
it could be a flip of death because of terribal noise from loosen parts or a noisy motor paired with an disconected capacitator. it could also be a faulty gyro or a broken esc.
you could post a video or dvr.

im sorry yes airmode is enabled in betaflight under configurations tab, im sorry i get terminology all mixed up also yes it is only when doing a forward flip that i get the death roll. i have done some research and looks like it could be my ESC are out of sync, Bad motor/ESC or that my idle speed is to high in blheli. i have yet to record a flight through dvr or black box i know i should have done this from the start. it is also stock PID and rates. It flew great before i crashed and had to replace the frame so im not sure what changed from then to now.

i have strapped my go pro on and looked at the footage and every time i do a forward flip and come out of it, it will dip down to the right. I have looked at the motor on that arm and it makes a grinding sound, as well as there is vertical play on the shaft. Could this be my reason for the death rolls? I am buying new motors (ones that are slightly more powerful) and hope this will fix my problem. I will come back later on and let ya know! In the mean time as always thanks for the help and making this an inviting community. ?

you could switch the motor to be sure about esc or motor, but as you found issues on the motor, replace it or get a spare would make sense anyway.
a new set of motors is allways nice too :-)

There should be none (or at least very little) vertical play on the the motor shaft. So that is certainly an issue. The motor also shouldn't grind as it spins. Try taking it apart to see if there is anything obviously wrong. Obviously you are getting new motors but it would still be good to see if you can identify the cause of the mechanical issue with that motor.

After swapping out the motor and doing a test flight i was able to do rolls without the roll of death. Seams that i did in fact have a bad motor. Thanks for the helo and ideas.