Hey guys, new to the forum here. I have a 72 Datsun 240z with the l28et swap out of I believe and 82 280. my current setup is megasquirt fuel/spark management

240sx throttle body

1 inch throttle body spacer

high performance coil pack

4 row MSA racing radiator and electric fan

t3/t4 garrett turbo

manual boost controler

custom 3 inch downpipe

3 inch straight threw exhaust

fmic

greddy bov

centerforce df clutch

rci fuel cell

msd external fuel pump

r200 with cv axel swap and nismo 2 way gtlsd with a 3.59 gear

my question is what is a safe/good amount of boost to run? I have heard on the stock turbo 10-12psi in max but I have the t3/t4 hybrid turbo. The reason I ask is last night I took the car out for the first time (I re-did a bunch over winter) and the car hit 20psi. I wasn't expecting to get that much so I want to make sure its not over the motors limit, and if it it was should I turn it down to? Thanks for any help!

How much boost you can run is mostly determined by the fuel used and the quality of the engine tuning. You can burn at piston at 5psi and/or run just fine at 20psi.