I have a b18c. I just rebuilt it and put a turbo on it. It has a max rev manifold, t3/t04e 57 trim 63 a/r. 2.5 downpipe, 3 in exhaust. tial 38mm wg, drag icooler with 2in. piping in and 2.5 out. I am showing vac. on my boost gauge and in my datalog, but it doesnt make any boost. i pulled the charge piping off before the throttle body and it is pushing air and seems to pick up around 4000rpm. I am under the impression this configuration should spool around 3800 rpm, but mine doesnt show any positive pressure and i have run up to 5500 rpm. any ideas?

 

check all of your couplers

 

definitely make sure all your couplers are on tight

 

i have checked the couplers and they are all tight. I looked at my data log file and the map reading at 880rpm was 24 and at 5500 it read 23..

 

make sure there arent any rips on the couplers, a tiny rip affected my car a lot

 

make sure the wheels of the turbo can spin.

 

is it possible for the wastegate to be stuck open?

 

its possible

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jtracing919 &raquo;</TD></TR><TR><TD CLASS="quote"> i pulled the charge piping off before the throttle body and it is pushing air and seems to pick up around 4000rpm. I am under the impression this configuration should spool around 3800 rpm, but mine doesnt show any positive pressure and i have run up to 5500 rpm. any ideas?</TD></TR></TABLE>

when your just sitting somewhere, your car will not make boost the same as when the motor is under load (driving it). So you cant really go off of that..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96 GSR-T &raquo;</TD></TR><TR><TD CLASS="quote">is it possible for the wastegate to be stuck open?</TD></TR></TABLE>

do you have the spring and/or the fire ring in place ?? Ive def. seen a few people leave the fire ring off the wastegate.

 

I can see the wheel spinning in the compressor housing. i have felt under the dump tube and nothing is coming out of it. i am going to double check all my connectors and my manifold gasket and wastegate mounting to make sure nothing is leaking. if its not that i am at as loss..

 

if you are free revving it it wont build any boost....

 

well i guess make sure your intercooler doesn't have any holes in it i guess if you have checked all your couplers

 

10 bucks says he is free revving it and thats causing it to not spool