I have a stock 91 gto twin turbo, Ive done cat delete, new 3” exhaust straight a hose delete
And put a mbc in place wound down . Running 9/10 psi .
The car powers well up to 4/4500 revs then cuts ( split second then powers ) change gear and still does it ( sometimes cuts at a higher or lower Rev range ) before fitted no faults at all .
If I’m gentle on the throttle it will power through but gentle .i don’t want massive boost just as is 9/10 psi .
Thanks in advance