What Std Stuff Do I Need To Convert From Coilovers To Bilstein/whiteline
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What a wonderful journey to read. Loved the photography. Literally found this an hour ago and couldn't stop reading, plus checking out a couple of the links. Was interesting as you had a few mods very similar to my sons Gtt, including the sheetmetal homemade V-Spec II rear diffuser, can't be too many of them around the world. Only to find it sold about three weeks ago. Well at least I won't have to keep re-visiting for updates. Anyway, well done on not just the car but the well written story and descriptions, and of course the pics. Good luck on your next one. Rob -
Forgot to update. I ended up removing it and found out that it's dead. The car seems to run better than it did, although I haven't driven it hard yet. Literally just a flow restriction. -
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^ This is all good advice. I can imagine that there's some passive components in the HVAC controller that run that PWM output that could die, or suffer bad solder joints. It can be worth opening it up, taking a schmooze around looking for swollen electro caps, evidence of liquid escape anywhere, tracks that have been hot, lifted, cracked, etc. A DMM might not be suitable for seeing if the PWM output is pulsing. Might be too fast and too low voltage for a DMM to keep up. An analogue voltmeter might give a better hope. I use a handheld oscilloscope (<$100 from Aliexpress if you want something cheap). A DMM might see the voltage across the motor flicker. Otherwise, as above. If you can successfully see PWM action, then the control side should be good. If you can't see it with what you have, you might need to step up the instrumentation used, as above. Beyond that, and dbm7's advice on testing the motor directly, you're down to looking for broken wires, corroded connector pins, etc. -
So Thanks for the comments etc. To follow up on this, we went down the path of fitting a divider down the middle of the external pipe that was added to the exhaust manifold and the divider went from very close to the external wastegate all the way up to the "V" part where the pipes from each side of the manifold joined. After this modification it was finally in a position to do the dyno-tune with some degree of success. Top end power was down about 10kw (250rwkw down to 240rwkw) I believe from previous but it seems to be more responsive lower down and at least it is now driveable and fun and back on the road to be enjoyed. Apparently the timing couldn't be run the same as it was running into knock and boost was down about 1psi. For all we know this could have been from the fuel being a bit older, or perhaps some slight complication from the new head gasket as we didn't have compression figures from before that mod to compare. I'm no mechanic and this is second hand info but I just wanted to follow-up to those that commented or read the original post with interest. After so many months of stuffing around this is a big win. The interesting part was most of the info around this was gained from information around Barra motors and not GTR as the manifold setup on the Barra with single turbo was more similar. Thanks for those that helped with info. Regards Rob
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