my setup
100% stock gsr motor
peakboost ramhorn manifold
xs power waste gate (going to get a tial wastegate)
50mm tial bov
450 dsm injectors
garret t3/t4 turbo a/r 60
walbro 255 lph
3inch downpipe going to 2.5 inch exhaust with high flow cat
stock intake manifold
tuned on crome
on 4.5 pounds of boost (have a leak somewhere going to go for a retune after its fixed and boost 8psi)
making 221 hp and 165 torque I don't see boost until after 5500 rpm

Question a t3/t4 60 compressor side and 63 exhaust size where should it spool at?

 

What do you guys think about the numbers and when I up the boost to 8 pounds what should my numbers be?

thanks again
chris

 

well if you have a boost leak than spool time is going to be effected. once you get the leak fixed and are making the 8psi that you want you should see full boost right around 5k or so on the 60 trim. its hard to analyze the graph if you are having problems.

 

But where should I start to make boost, not full boost?

thanks again
chris

 

u will prolly start hearing it around 4300-4500, more or less

 

yeah once the turbo finally starts spinning it should only take a few hundred rpm to get to 8psi. also there will be alot of factors that play into it. ex: load on the motor, what gear you are in, etc.