Hi,
Just finished rebuilding our GT Turbo. Had a rolling road but we didn't make the BHP we'd hoped for.
Car - standard C1J bottom end.
carb Modified jets - changed and adjusted by rolling road tuner.
T28 with .49
T3 actuator
GT tuning uprated intercooler (NOT FMIC)
2.5 inch down pipe and scorpion exhaust
possible uprated cam (have receipt but not 100% sure it's in the engine!)
possible uprated valve springs
uprated air filter - PIPERCROSS
adjustable bleed valve
new turbo installed and then rolling road str8 after.
was 125bhp, now 157bhp flywheel
was 105 at wheels, now 145 at wheels,
was 120lb/ft now 165lb/ft.
this is on V-Power running 18psi.
to be honest we were expecting more?
one thing that surprised us is that the turbo didn't seem to want to blow anything over 20psi regardless. (although we want to run at 18psi - wondered if this was an indication of a problem?) this was the tuners measure not a crappy boost gauge (although our boost gauge was very similar).
so 3 questions...
what is the restriction in this set up that is holding us back?
is it maybe the turbo as it wouldn't blow over 20psi no matter what he did?
or are these figures ok for this set up?
it does feal alot quicker and a great drive now but we are still looking for more.
PS: the engine is spot on for compression etc so think its in the fuel or boost circuits?
PS: the tuner is very familiar with turbo carbs and old school motors and is a pro guy not just some have a go hero.
thanks
Team Baron!