Re:no downpipe
 

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

Re:no downpipe
 

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

Re:no downpipe
 

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

Re:no downpipe
 

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

Re:no downpipe
 

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

Re:no downpipe
 

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 ass. ::)

Re:no downpipe
 

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

Re:no downpipe
 

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

Re:no downpipe
 

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

Re:no downpipe
 

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