Cheers for the comments guys
Originally Posted by Rafa
BTW, the 51st State? Are you my neighbor? If so, you should visit sometime and tune mine!
Yea I'm in sunny England (about an hrs drive north of London), if you ever happen to be in the area just give me a shout
Originally Posted by Mach929
what is your setup as far as wastegate goes. you're losing 60ft lbs of torque between 5400-7000.
I'm using a helper spring, and I've changed the wastegate actuator air feed over to the intake side, just before the throttle plate near the BOV.
Boost is holding 16-17 psi to redline. The timing is very advanced on this setup, the base timing is still circa 7 degrees advanced
from 5500 to redline. I'm pulling 4.5 deg from a base timing of around 12 or so (16 psi), and that increases to 5 deg pulled at 17 psi.
The water injection makes this possible, excellent at keepin knock under control and keeping temps down.
I get the impression that the GReddy compressor is losing efficiency at these levels, causing the torque to drop off and adding more heat. Every high boost GReddy dyno plot I've seen has the characteristic torque drop at high revs - even when the boost is holding.
Originally Posted by Saml01
What kinda intake temps are you getting?
Good question, the simple answer is I don't know (yet). My intake air temperature probe is disconnected because I'm in the process of relocating it though its been like this for months.
Before fitting the water injection I did a trackday (just over a year ago) running 15 psi and saw virtually no knock. I'm running an extra psi or two and with the additional water injection I think temps are under control - but I won't know for sure until I get the sensor installed. The main difference between this dyno run and the previous is the ignition timing advance, at its peak its added a good 17 bhp.