I actually read somewhere that too little of backpressure hurts spool up. Even with 3" exhaust everyone is running you still have that much more backpressure. Maybe that makes since :P

 

this could be it or a weak vac source for the wastegate

 

i think he's got a boost leak, try tighting ur fittings

 

The theory behind this is that internal wastegates were designed when there was backpressure so when you have no backpressure than the internal wastegates will slightly leak. I don't know if this is true or not but its a theory I've heard

 

frank fulls spool by 4500, your ---- it fuckt too, my t3/t4 on my d series spooled 16 lbs by 3800 your runnin a 42/48 trailor trash turbo

 

I also have a stupid ------ non ported hf mani, crush bent pipes, flex pipe, so im sure that might be part of the reason. not to sure, but its a pretty decent assumption.

and a trailer trash 42/48? its pushin the same amount of boost as that wasted sc61 you think is so bad ***.

 

comparing 4psi from a .42/.48 to a SC61 is like night and day. Not even a comparison

 

we did not have a gasket for the bov so that might be the prob.

 

my point was, hes pushin 8psi out of a sc61.
to each his own.

 

carb spring that beast and see what happens. Mitsus are likely to have bad wastegates.