First auto-x is next Sunday. Finally got the 500 city miles logged on the clutch today and almost done with injector scaling and latency. I haven't been happy with how the transmission feels going into 2nd and 3rd even when warm. It wasn't grinding but it was super clunky feeling. It turns out I just had the clutch adjusted too far out. I bled the clutch line twice, bled the slave, and have been screwing with the adjustment but never thought of going the other way. About 2 minutes at a local Evo shop and they told me to adjust it down. It feels a lot better now. I still have to address the clunk in the rear and I'm getting scared it's my diff. Now that I can start tuning for power and throwing some light abuse at it hopefully I'll find out if it's the sound the Weir makes or if something else is wrong. I really want to race it next weekend.

I also found a cool spot for a black and white photo so I took advantage.

 

That shot looks great. Hope you find out what that problem is and hopefully it's nothing too troublesome.

 

Thanks, man. At least it's in the rear end and not up front. It's a lot easier to drop the rear diff than it is to drop the trans/t-case. When I put the Weir in it didn't have as much spring pressure as other's I've seen in writeups when I put the diff case together. It wouldn't have affected gear backlash. With all the emphasis on not mixing up bearings/spacers in there I can't believe that I would have done that. Perhaps tomorrow I'll figure it out.

 

Keep us posted. It will be good to know. Good luck man!

 

The injectors are now dialed in and they're running -0.3% at cruise and +1.3% at idle. I think I'm happy enough with where they're at. Found an awesome stretch of road for doing third gear pulls and have gotten a few in today. I'm still working on my WGDC profile but 70% is netting me around 18 psi dropping to 17 at redline. Even with this low boost, my HP numbers in EvoScan are right where they used to be at 23 psi. Once I get my profile to where I want it I'll have to weigh my car and download Virtual Dyno. I also still need to boost leak test the car but I don't have a compressor so I'll have to wait until tomorrow to borrow a friend's.

I haven't heard the clunk all day today. There's no weird sounds when going WOT, but I haven't launched it or anything yet. I'm going to keep daily driving it to work this week to see if the noise is gone or I just haven't heard it. I was a little immature while turning left from a couple stoplights today. I was expecting to feel the rear loosen up a bit but all I felt was insane levels of grip and the car just putting me in my seat. I can't wait to get this onto an auto-x course. This is going to be the longest week ever.

 

Well, scratch that, I made it clunk again. But I also got some more pulls in and am really happy with how she pulls. I entered my old WGDC profile for 23 psi and it only netted me 20 on two runs. Then I did a run with the cutout open and it jumped to 23. I did a third with the cutout closed and it was back to 20psi. It never used to do this so now I get to figure this little riddle out, too. I've also developed a squeak at idle that goes in time with the cam lope. I can pull on the intercooler and it goes away, but it's not touching anything. I'm going to have to see if the LICP is hitting the end tank inlet.

 

Like with anything, it's amazing how much time you can devote toward hunting down <insert annoyance here>. I miss the days of having a garage to work on my car although it was mainly maintenance and waxing ha

 

Alright well I am nowhere near done tuning (pretty much just started) but even with the boost leaks fixed I can't get the same WGDC to produce the boost I want with the cutout both closed and open. I don't know if I'm just giving my WGDC more due diligence than last time or if something's changed. I'm now running 83% duty cycle from 3500 to redline and it's getting me 22 tapering to 21 with the cutout closed and 26 tapering to 23 with cutout open. If I really wanted the same boost pressure at all times I could handle it with boost error correction but I'd rather not. I also don't like how much duty cycle I'm having to run so I'm probably going to order an 18psi actuator.

The noise I don't like is still there but is staying consistent. I'm going to auto-x it tomorrow as a shakedown and see if anything gives or affects the sound. I did fix the squeak at idle. I spaced my intercooler out another 1/8" than before and it was just enough to rub on the bumper which was creating the squeak.

I also took some underpass U-turns today and got to feel the diffs work a little more than I have as of yet. I may be in love. I'll report more on the diffs after tomorrow's event.

 

what bcs and wga do you have? How much preload on the wga?

edit: just looked at the mod list again....grimspeed bcs and stock wga?

 

Grimmspeed BCS and stock WGA. It used to take 76% to get me to 23/24psi so it's not that much higher, but still.

 

How much preload?

 

It's never been adjusted.

 

FWIW, Ive got my stock wga threaded down as far as it will go and Im running around 65% down low to around 45% wgdc up top with an Ingersoll-Rand solenoid. 10.5 hotside vs 9.8, but still might make the difference. Have you ran with the hta71/9.8 before now?

 

I've never run with the 71/9.8 combo but the 9.8 is what was on my stocker. I don't know why I didn't think to adjust it but now I don't want to have to retune the WGDC this afternoon to be ready for tomorrow. Those percentages are netting you your 27 settling at 25, correct?

 

The attached WGDC map gives me ~28-29psi tapering to 25 up top in 3rd. Little more in lower gears, little less in upper gears.

I agree I wouldn't mess with it before the event. But its worth looking into adding as much preload as possible before going much further with boost tuning.