In non-turbo news, I cooked the brakes recently while collecting data to characterize boost response vs engine speed, MAP, and vane position. Was using the brakes to hold RPM while the turbo spooled, back-to-back runs for over an hour. So I figured it was a good time to swap in the new brake lines from Garagistic, new rotors and pads, and ABS delete.
Originally planned to use Hawk HP+ pads I bought a long time ago. Started with just rear pads and rotors so I could do more VGT characterization, and holy cow were those Hawk pads annoyingly loud after a few miles. Threw in some cheap Duralast pads for now, nice and quiet again.
Brake line swap and ABS delete has been kicking my butt a bit. Fronts were easy, but those rear flex lines above the subframe are a huge pain, and despite using flare wrench(es, I tried several), a few of the nuts absolutely refused to budge after 35 years. Ended up having to remake both rear hard lines that run along the trailing arms. Got the brake line swap finished, at least.
ABS delete is also mostly done, but apparently I ordered the wrong tee fitting for the front brake lines (ordered inverted flare for some reason, instead of bubble flare), the correct one should get here today, so hopefully I can get the car functional again tonight by finishing up the ABS delete and doing the front pads and rotors. Might also add a secondary diff mount while the car is in the air, should be a relatively quick job.
If I do get the car going again tonight, I'm planning to head to the drag strip tomorrow morning for some 1/4 miles runs. I don't plan to launch very hard, want to try to save the rear axles for next year, so don't expect any amazing ETs. Mostly curious what the trap speed will look like on 11psi (180kPa MAP is what I've been running for the time being). The drag strip is more like 4500ft elevation so turbo response will be noticeably better compared to the 6000-6500ft I've been tuning at. Will also be a good chance to check on how well my MAP-targeted closed-loop dome pressure boost control is working. Should keep MAP at 180kPa despite the ~5kPa increase in ambient pressure, if I have it tuned properly.
Untitled by Mikey Antonakakis, on Flickr
Originally planned to use Hawk HP+ pads I bought a long time ago. Started with just rear pads and rotors so I could do more VGT characterization, and holy cow were those Hawk pads annoyingly loud after a few miles. Threw in some cheap Duralast pads for now, nice and quiet again.
Brake line swap and ABS delete has been kicking my butt a bit. Fronts were easy, but those rear flex lines above the subframe are a huge pain, and despite using flare wrench(es, I tried several), a few of the nuts absolutely refused to budge after 35 years. Ended up having to remake both rear hard lines that run along the trailing arms. Got the brake line swap finished, at least.
ABS delete is also mostly done, but apparently I ordered the wrong tee fitting for the front brake lines (ordered inverted flare for some reason, instead of bubble flare), the correct one should get here today, so hopefully I can get the car functional again tonight by finishing up the ABS delete and doing the front pads and rotors. Might also add a secondary diff mount while the car is in the air, should be a relatively quick job.
If I do get the car going again tonight, I'm planning to head to the drag strip tomorrow morning for some 1/4 miles runs. I don't plan to launch very hard, want to try to save the rear axles for next year, so don't expect any amazing ETs. Mostly curious what the trap speed will look like on 11psi (180kPa MAP is what I've been running for the time being). The drag strip is more like 4500ft elevation so turbo response will be noticeably better compared to the 6000-6500ft I've been tuning at. Will also be a good chance to check on how well my MAP-targeted closed-loop dome pressure boost control is working. Should keep MAP at 180kPa despite the ~5kPa increase in ambient pressure, if I have it tuned properly.
Untitled by Mikey Antonakakis, on Flickr
Comment