I have had the engine on my 3 door finished now. Basically the car is fitted with 4 x 1000cc injectors and a swedish made large inlet manifold.

In addition is have:

big winged sump with 9 litre oil capacity.
bailey oil cooler
new radtec RS500 intercooler
L8 ecu
bailey oil breather system
rebuilt T4 turbo
uprated fuel pump and dedicated aeroquipped line and dedicated power cable.
I have had the car live mapped with the car finding full boost by about 4000 rpm and holding 30 psi through to 5500rpm, then tailing off to about 28psi to the redline. The car really seems to fly (but is still very laggy). However, I had the car dynoed on Thursday and was disappointed with 385 bhp at 5800 rpm and 353 lbs torque. I was really expecting more as this less than what the car was dynoed at with a bleed valve and lower boost on grey injectors (435 bhp).

Fuelling was fine on the rollers.

Anyone got any ideas where I should start looking for the power shortfall?

 

Would start with the inlet manifold, 385 is very dissapointing with that spec

Could be wrong but i think Karl isnt a big fan of those inlet manifolds

Would speak to Karl about it