So, anyone having issues with ABS freaking out? Instead of going ice mode like most cars seem to do when you get on the brakes too aggressively, mine decides to throw ABS codes and warning lights and shuts it off, allowing the wheels to lock up. Then, as you the car starts rolling again off the brakes, the lights go out and ABS is active, again. The codes it throws is C1115 (Wheel speed sensor input fault) with is really generic and just tells me that the ABS module just doesn't see wheel speed signals it expects to see and shuts ABS off. I honestly think it's something in the software and there's nothing physically wrong with the car. I've inspected my speed sensors to make sure they weren't dirty or had a lot of metal attached to them, which they don't. I'm wondering if my Z1 diff cover has anything to do with it, but the sensors seem to have a good air gap from the reluctor wheels, and also I think I had the same issue while I had the stock cover on, as well, but I could be wrong.

I've had the same issue happen on my SP car a few times. For me, it always seemed related to heat. The only difference is mine doesn't immediately go back to normal. It generally takes 10-15 minutes of "cool down" time with the car off before the fault clears. Best part is that while the ABS is faulted the car won't turn off like it should because it doesn't know the car is stopped. Only way to get the car to shutoff is to push and hold the off/on/start button.

I had something similar on a wet track day that I'm still trying to figure out.
ABS was freaking out going into corners and all my dash lights lit up for a second or so.
They'd then turn off, and also set traction control back on (traction control went from turned off, to default).
I then turned TC back off coming out of the corner and the same happened twice more.
On the third corner, the whole car shut off and wouldn't start back up again.

I've been thinking it's battery or alternator related and haven't tested yet, but seeing this thread, I'm wondering if it could've been related to confusing the ABS.

I'm almost starting to think it actually may be related to my Z1 diff cover. I thought it did it with the stock cover, but talking to one of my friends who co-drove with me the first day it happened, I already had my new diff and cover installed. So, now I'm wondering if the air gap on the rear sensors is too big. It's hard to get a dial indicator in there to see exactly what it is, but my eyeballs estimate it's somewhere between 1-1.5 mm on both of them. I cannot find any specs for the air gap, but think it should be less than 1 mm. Is anyone able to check the gap on their rear sensor with a stock diff cover?

My ProParts Konis are for sale, if anyone wants it. :D

I have the same diff cover (coincidentally?)

Car was fun while I had it, I just enjoy driving my brother E90 M3 more in STU trim and not worry about the ice mode issue. I took the parts off and sold the car.

I can bring some of these parts to Nationals if you guys are going. http://www.the370z.com/parts-sale-pr...s-partout.html

Packwood Tour was this weekend. It was the first national event in the car. I'll start off by saying how much I absolutely hate how quickly RE's heat cycle out. My first set of tires are only about 4 months old and maybe have about 50-60 runs on them, and they have fallen off so far. Anyway, brand new set was had for the tour and the car just came back to life.

Saturday started off with the car feeling absolutely great. Unfortunately, the course was fairly tight which would make it difficult to not be straight timed by classes like STR, or even STS. But I ended up with a .526 second lead going into day two.



Sunday went a little differently. My co-driver's first run went without an issue. My first run, however, got bad fuel starve. It's my first time having it. I knew it would happen at some point, but I went as low as 1/8 of a tank in the past without an issue. This time, it happened after a long right hand sweeper with just under 1/2 a tank. As my co-driver went on his second run (which he experienced fuel starve, as well), fuel was on it's way and I was able to add four gallons and finish the rest of our runs without an issue. This day, I ended up second fastest. But, I held on to the win. My first national win in my own car in quite a long time.



This weekend makes me really wish I was taking this car to nationals, this year. After winning last year in an STI, this car just feels waaaaaaaayyyyy better in sweepers, with a much less need to shift compared to the Subaru. It's hard to see this car not be better on the sweeper heavy courses in Lincoln.

Congrats on the win and nice driving. That is the knock on RE in the time attack world. They are real fast and fall off quickly. Good for a couple of 20 minute session for the real go fast guy and a couple of week at best for weekend warriors.

The RE drop off and lack of Pro contingency are the two reasons we switched to Nexens on the Subaru. I wish 285/19s were available with more tires. I may drop to 275s to try something else. Possibly the new Yokos.

New wheels and tires are on the car. I went with the Advan A052 in 275/40/18. The only 200tw tire I am somewhat interested to try would be the Nexens, but I don't know if I will make it that far. I haven't done any objective testing but I really enjoy the Advans so far. Like many have noted, they run wide. I took a side by side during the swap.

https://live.staticflickr.com/65535/...cd0364a2_z.jpgIMG_20190719_201604 by brendan sobers, on Flickr

Both tires are 275 section width, but the BFG is on the factory 19x10 and the Advan is on my new 18x10.5. The bfg had a bit of stretch on the on the 10 while the Advan is bulging on a 10.5. Hopefully Yokohama continues to expand the size range as I would be interested in trying the Advan in 35 series, but the 275/40 works just fine. Turns out you don't need tiny sidewalls when you can run as much negative camber and caster as you like. Definitely looking forward to seeing some of you guys at nats and having more technical discussions on here, but enjoy some of my homemade wheel and stu prep z porn :3

https://live.staticflickr.com/65535/...bdf725c5_z.jpg_BES2844 by brendan sobers, on Flickr

https://live.staticflickr.com/65535/...4333df19_z.jpg_BES2841 by brendan sobers, on Flickr

https://live.staticflickr.com/65535/...5b85e40b_z.jpg_BES2845 by brendan sobers, on Flickr

https://live.staticflickr.com/65535/...dd8d8b46_z.jpg_BES2846 by brendan sobers, on Flickr

Video of my first event on the new wheels and tires below. Coned away my ftd but the delta is getting smaller. Still need to work on my driving and continue optimizing the car, but there is a lot of potential.

The Nexens are very cold blooded. On a hot summer day and with two drivers, they are difficult to maintain optimal temps. Luckily, the don't just suddenly get greasy. They gradually fall off. As a single driver, or someone in colder climates Nexens can be a fantastic tire. At least they are on the STI that I won Nats in, last year, and the ProSolo championship the year before that. They might allow a little too much slip for a RWD car, but I'm not sure. My only experience with them is a year and a half on them with an AWD car, and that car freakin' loved them. They also have fantastic contingency payouts.

I am interested in trying the Yokes. With 19s, though, I'd have to go down to 275s, something I've been contemplating to expand my options.

The last few weeks have felt great in the car. I got the Packwood Tour win. We ended up running the STI the following weekend for the Packwood ProSolo, winning Bump class because STU only mustered up three of us, even though I made my Z available for people to fill. This weekend had two different events from two different series at two different sights (both runway sites - Sanderson Field and Bremerton Motorsports Park). The car felt great both days. Unfortunately, Saturday's course was one that gave you great times if you were on top of the cones. Unfortunately, I was on top of too many cones, and had to add distance to just get a decent clean run. I ended up uploading my fastest scratch.



Today went better as I was able to keep it mostly clean and ended up fourth overall PAX behind those with squishy indexes.



Also, non-Z related video is the only footage I got from the Pro in the STI. This is round two of the Super Challenge where I was eliminated. Both the STI and the Z are fast STU cars, but both do it in extremely different ways. The STI promotes a very aggressive style with steering and throttle inputs to keep the car rotating, allowing you to throttle out of trouble. The Z would punish you if you drove like this, requiring much smoother throttle inputs and less flicking. With how well my car is doing these last few weeks, I am extremely annoyed I'm not going to Nats this year with my car. I think John Hale's going to be the one to beat, this year. If I went and was on my game, I think it's a pretty good chance the Z can come out on top.

Anyone want my G37 rear bar? It's free.

If you are going to Lincoln, I can bring it.

I thought you had sold it. I'll take it off your hands.

I have been absent from the forum for a bit but I too have had issues with abs failure all season (not ice mode, separate issue and that's why I sadly can't run xp's :( ). It's been extremely frustrating as it's difficult to replicate and is random occurrence. My co-driver is inexperienced and flatspot corded an almost brand new set of 285 71's.

I also have a z1 diff cover that I added when I installed my pro-gt at the end of last season (and abs failures did not occur until this year)..

Anyone make any head way on the ABS issue? Just had it cost my co-driver a shot at a podium in BSP at Solo Nats. Basically had to drive the car with intermittent ABS on day one which didn't provide any confidence in the car. On day two the ABS decided to work and the co-driver was setting times that would have put him near the front. :mad:

Two bits of info that may be of value:

1. On day one we were using tire covers to keep the heat in the Hoosiers but on day two we skipped the covers in hopes of keeping ABS functional.

2. On day one the co-driver was heavily trail braking where as on day two he greatly reduced/eliminated the trail braking he was doing.

NLZN and I have been trying to see if the distance between the rear sensors and the rings is an issue. He measured with the stock rear cover at around 0.98 mm gap. I measured it with the Z1 cover at about 0.7-0.8 mm. Just today, I added a 0.3 mm shim to add some gap and will see if it makes a difference this Sunday.

Nationals was fun and a learning process as usually. I was only able to get a mid pack finish but it was an improvement from how I did at spring nats earlier in the year.

On day one I ran into fuel starve issues so it's good to know that the new stiffer springs up front allow the car to pull enough g to do this. A different but similar prep z was able to make into a trophy spot. It will be fun to see if the chassis is capable of winning with more development.

As far as my car, I am pretty happy with the balance but don't think I am ready to add power yet. However, a seat is pretty high up on the list after sitting in the other z. Looking to add one next spring

Any video of the runs?

I put them up on instagram but I can see if I can get the link to work here

not sure if this will be workable unless you have an account there
day 1
day 2

Day 1 lesson was just to run more fuel in the car. It now pulls enough g to fuel starve so the long sweeping corners weren't doing me any favors.

Put more fuel in the car on day 2 but blew the braking point into corner 2 so I had to stand on my clean but slow second run.

I'm bummed I missed Nationals, this year. It would have been fun hanging and racing with you guys. I watched Jimmy's (Evo 3rd place) and John's (STI 2nd place) videos of their runs. Seeing how much John had to contend with the STI's stupid gearing I think I could have had a good running for second place. I haven't seen any footage from Mayfield's runs, but with how he destroyed the class, it may have been very difficult for me to keep up with him. But, I look forward to trying, next year to regain my title.

Any plans on doing Crows or Packwood, next year, Brendan?

Also, to follow up on the ABS issues a few of us have been having, I did have a local event, today after shimming my rear sensors. I only got four runs, with some moderately heavy braking zones and had no issues. It'll take a couple more events of no lock up episodes for me to be convinced that it's fixed.

as of right now I plan on doing mid divs in Lincoln next year before nationals. That other stuff is a bit too far for me.

Awesome. This is the kind of development I was looking for. Hopefully you can make it out to nationals next year.

So did this make any difference?

So, I've gotten three events in, 11 runs total, three of them in the rain, today, and I haven't had an issue yet. I'm fairly convinced it made a difference, now. I still have two more events for the year to be even more convinced between now and October 20th.

I decided to increase the rear spring to 16k. This makes my current set-up 18k front 16k rear with the hotchkiss bar up front and no bar out back. I feel like my driving has gotten to the point of where I can handle a little oversteer on entry. Justin was nice enough to gift me a g37 rear bar so I will try that if I still need more rotation.

I have yet to encounter any ice mode issues but it's good knowing that we may have found one solution depending on the cause.

It is so fun being able to actually fix issues as oppose to drive around them in street class. Even if the car isnt capable of winning (which I think it is) it's much more enjoyable than it was in bs by a long shot.

Just to be clear, the issue we're fighting is NOT ice mode (hard pedal but little to no actual braking). The issue is that ABS gets confused and just quits working leading to lockups.

Got it. Thank you for clarification.

Big fan of the new 18k front 16k rear set-up. It killed the remaining feeling of understeer I was getting on entry while still being easy to balance during high speed transitions. If needed I can still stiffen the rear dampers to get even more rotation but I think its good for now. Still running into issues with fuel starve though. I was hitting it coming out of the long right hand turn early in the run. Are there any stu legal solutions to this aside from running a full tank?

There shouldn't be anything we can legally do. My fuel starve issues I've experienced also came after a long right hand sweeper.

All good. I plan to rebalance the car over the break. I'll just calculate everything with the extra weight of a full tank.

So, my ABS issue returned yesterday as I had the right front lock up on me entering a tight turn around. It only happened once all day and is the first time it's happened in about four events after I shimmed my rear sensors. I'm now at a total loss for what direction I need to go to rectify this situation. Maybe the shims helps, maybe it didn't. I honestly don't know, now.

:shakes head: Well $hit, I was really hoping the shims were the answer.

anyone planning on doing any of the tour events this season? I'm still a little nervous about driving out to spring nats after my experience last year (:ughdance:), so we are looking south and west.

Since the Crow's tour is no longer, Packwood might be the only tour I do this year. Crow's, LV, Fontana, Spring Nats, and both PW events are in my possibilities. Most likely, though, it would be Crow's and both PW events plus Nationals for me, this year.

Gomer gave me the idea to look into converting the spl front control arms to take a cylinder bushing and it looks like that may be possible. It looks like just need to buy these to replace the spherical joints the spl arms come with . I wish I would have known this before buying the z1 stuff, but it is exciting to know we have another option and possibly the best option as far as ease of use and legality. SPL is nice enough to offer a trade in program which I may take advantage of if this works. Time frame for when I try this will hopefully be before the season starts or maybe earlier into the season as I still need to buy my seat, mounting hardware and tires.

https://cdn10.bigcommerce.com/s-xn4b...0.1280.JPG?c=2

https://content.speedwaymotors.com/P...e8c079dbf.webp

The only real trick is to get the inner diameter of the sleeve and the width just right. Pretty easy if you know someone with a lathe that can turn these parts for you.

Should be, and then I can just get some shims in there to take up the width.

We had our first event of the season, today (well, yesterday as it's 12:23 AM). This was just a practice event and I decided to try a different camera view. I ran my car in the morning, but was mostly dirty, so I uploaded my fastest scratch, which was flirting with FTD. The car is mostly unchanged from last year. I was still on last year's tires. Last weekend I decided to take out my Corbeau's and threw the stock seats back in as the Corbeau's just didn't fit correctly in the car. I will replace them with something else in the future.



In the PM, a friend of mine insisted that I should hop into his car, so I did.....a 2018 GT3. This WAS good for FTD.

Whew, finally got into the forums after a month of reading along.
Sold off everything, including my old 350z build, to go for a more competitive build and save some money at the same time.

Starting with a 2016 Nismo 6MT -- maybe not the optimal submodel for weight but it's the one that I wanted.

My MCS 2WR order is being built and I'll have an OS Giken on the way soon enough. I'm not going to get the higher-capacity housing, just to see if avoiding the displacement of sensors helps keep the ABS issues away.

On the cheaper side of the build, I've never had so much trouble deciding on an intake and brake pads before...

Posting a little build thread on reddit too. https://www.reddit.com/r/370z/commen...nismo_for_stu/

Welcome to the forum. :tup:

If you want to start a build thread here. Here's the section to do it in. :tup:

Member's 370Z Gallery - Nissan 370Z Forum