Pull a vacuum on an AOS with the turbo and your dipstick should not pop out! . I don't have the issue with the dipstick popping out, even on track. I don't use anything to hold it down or install it 180 degrees.

 

Ya for sure. When doing comparisons for back to back pulls I will use the same stretch of road. I've been doing pulls in 4th gear, but maybe 3rd gear would suffice as well. I'll have to compare it. Flashpro has pretty good resolution with datalogs.

Ha I flip flop back and forth on this. Right now mounting an AOS would be very tight and honestly I'm tired of wrenching so I'm going to throw some cheap catch cans on for now and think about it later. I have a bunch of things yet to do before the track weekend to get the car ready. Still need to bring it for an alignment, swap pads, change brake fluid, etc. etc. so cheapo catch cans vented to atmosphere is quick. I don't think my empty can sitting in the engine bay will pass tech.

First few times driving the car I was pretty nervous at the thought of going on track and now I'm getting used to it and I think it'll be a lot of fun.

 

Got some more things done. Finally put the under plastics back on. You have to cut the front lower plastic as the v-mount bracket gets in the way. It goes back on fine just needs to be split in 3 pieces.




Test fit the oil cooler duct. I just need to trim the back edge a bit and cut a vent in the fender liner. Got this from Tommy at Baero. It's 3 pieces 3d printed and fused together.


Another thing was got my alignment and the AC charged. Fortunately AC charged and blows cold, don't seem to be any leaks.



Got the new oil pressure sensor in and mounted properly. Also got a couple catch cans and moved the horn on the passenger side to the drivers side. The catch cans are cheap ones off of amazon. They look like Mishimoto knockoffs. For the cost of ~$20 each you can't go wrong imo.






Zip tied a bunch of things and secured things. Think it's ready to go.



Swapped the trunk lid with the wing. Still need to adjust it so it's at 0 degrees AOA. Here's how the car sits.




Still need to mount the oil cooler duct and swap pads for the weekend. Of course it's going to be hot as balls for the first event but that should be a good test. Another thing I just came to realize is that you can't have multiple obd2 devices/readers at the same time. The protocol was only designed for one device at a time and things can act a little funky when you try to have multiple obd2 devices simultaneously. I bought an OBD2 splitter cable ages ago but never knew this. It kind of sucks because I will be datalogging for flashpro but use an obd2 bluetooth reader to datalog for the videos to create the data overlay. Obviously the flashpro takes precedence so I won't have nice overlays this weekend. Either way, excited to see how the car does. Should be fun.

 

Excited to hear your track impression!

 

First quick summary is it was a lot of fun! Had a few small niggles but drove it home so I'm not complaining. It was hot as hell, and I didn't sleep for shit 2 nights in a row so I was pretty beat yesterday, still recovering a bit today tbh. Man the wing sure calms down the rear end. I was being a bit of a pussy I'll admit, but I found that you could really hammer down on the throttle and it stuck. Car felt pretty darn neutral even with the big wing but Shenandoah only has one higher speed turn.

 

So backing up a bit. Friday I installed the oil cooler duct. I cut a roughly 4.5"x5" hole in the fender liner and secured some mesh with zipties. I didn't want to cut it too big that way air would try to be forced through the cooler and not try to go around it, even though the duct is almost touching the setrab cooler.



Here's a shot of the Baero duct from underneath with the fender liner pulled down and the bumper on. It's trimmed to length and I used a piece of duct tape to "seal" the bottom edge.


Cool thing about the duct is it's so light I just installed it with duct tape. I was planning on siliconing it on but it was quite sturdy with enough duct tape.


Here's a shot with the car all ready to go to the track. I set the wing to roughly 0 AOA with a level.

 

Fun weekend at the track with a bunch of friends. Miguel has a silver Mustang and man that thing boogies with 305square tires on R comps. Here's the car before getting it dirty for the day. You can see Derek's red J swapped S2k in the background. He finally got it running again.



So where to start. It was really hot, high 80's and sunny Saturday, Sunday was also high 80's low 90's. The SOS v-mount kept coolant temps in check. That's good news. Coolant temps topped at 206F at the peak which is great. According to the hondata datalogs IAT's were ~97 degreesF. They started higher ~125F after sitting in the staging lane but after one lap they were down in the 90's. I know the OEM IAT sensor on these cars aren't fast reacting, but it looks like the v-mount IC and hood vents are working. I added a few gallons of 100 octane to each tank to be safe. From the logs the car was running a bit rich in spots (low 11's, even high 10s in spots) but not horrible. In the first 2 sessions I was short shifting quite a bit and taking it easy on the car. The car feels completely different obviously going from a wingless NA s2k to a boosted one.

For my car setup, just as a reminder since no one would remember but me, the car is on 255 square RS4's. Brakes are ST40 in the front with PFC 08's, and Urge rear rotors on stock calipers with PFC 97's. The front has some honed air guides, rear has no ducting. Suspension is KWV3s with some slightly stiffer springs. I used the same settings as last time but one more click of rebound stiffness in the rear. Overall the car feels very balanced. I was worried without a front splitter that the car might understeer a lot with the big wing, but it felt fairly neutral. The one thing about Shenandoah is there's only one higher speed turn. The rest are slower ~55mph, so the wing maybe doesn't make a huge difference, but it certainly helps and is noticeable. I've never tracked an s2k with a wing, and I see why some people say it's almost cheating. It tames the rear end down so much. During hard braking especially from higher speeds it makes the car feel more planted and powering out of turns you can get on the throttle early and hard. There might be a little countersteering required but nothing compared to wingless. Anyway, I was quite surprised how balanced the car was. It makes me wonder how much the front ducts affect the aero and provide some downforce in the front. I didn't have a problem getting the car to rotate if I wanted it to with trail braking and as the tires got a little hot the rear would slip a bit at WOT powering out of some turns.

Onto power.. it's just a lot of fun. Torque all over makes it so much fun. I have full boost 4k and up, which means torque anytime. There is a bit of lag, but it's not bad and with some practice you could certainly anticipate it to a degree. The transient response of the turbo is quick so going from no to full boost is pretty quick. Car is only running 8-9psi and I'd say it's plenty. I have no desire to crank up the boost. I barely set a new personal best at this track due to a few things, but no complaints for my first time out. I'm avoiding the carousel section on shenandoah and taking the bottom apron.

Fortunately only a few small hiccups. At the end of my last session on Saturday, I popped the hood and it sounded like I had a tiny exhaust leak (besides the v-band for the exhaust). On closer look it looked like the turbo assembly was vibrating/shaking a bit more than the motor was at idle.. I shut the car off and tried to wiggle the turbo a bit and yup, it had some play in it. I waited till it cooled down in the evening and checked it out and the v-band from the manifold to the turbo came loose a bit. Enough that it wasn't tight and there was some play in the turbo. I retightened the clamp and it was fine through Sunday. Not sure if it's a common problem for v-bands to loosen a bit..? I thought I tightened it enough. Garrett says 140in/lb which is only about 12lbft. Fortunately seems to be fine.

Another small thing is the catch can that is fed from the stock pcv location filled up with oil by the end of the 3rd session on Saturday. I did the rainh8r mod but I guess the increased crankcase pressure is pushing it out before it has a chance to drain. The front port was collecting some oil in the catch can but much less. The catch cans I have are pretty small so it's not a big deal. It's fairly easy to unscrew and dump them. Good thing is after changing the orings on the dipstick it doesn't pop anymore due to crankcase pressure.

Also, on Sunday I started revving the car out to redline more and pushing it a bit more and noticed oil pressure would briefly flash into the 50's. This was my 2nd session on Sunday only 10mins in and I decided to shut it down for the weekend. Plan is to put some 40W oil in it now. Oil temps climbed to the 260's or 270's. My memory is foggy as I was also pretty tired by then. I'd say the oil cooler duct is working. I wanted to do some back to back testing with it blocked off but ran out of time and energy. It'll have to be another time. All in all I'd say the weekend was a big success. There were a lot of changes to the car and it held up well. I wanted to let Dave take the car out for a few laps (he's a good driver) and let me know what he thought, but that'll have to be another time.

If anyone has opinions/thoughts please chime in. BW suggested using some 5w40 and I probably should've listened. I will probably try out the 5w40 Rotella T6. I was seeing 68psi last year in vtec when the car was NA at ~230F so if I'm at 270 low-mid 60's doesn't sound too out of line. Oil pressure seems normal otherwise on the street/idle. With oil temp ~200F, it idles at 19/20psi and I see 82psi cruising on the highway ~3500rpm. Some other thoughts.. I think the 100octane I put in the car had no ethanol. Maybe that caused it to run a bit richer. I will talk to the tuner and see what he says. Anyway, car was a blast, I'll upload some youtube videos.

Here's the car dirty after the skidpad.

 

Oh ya, another important tidbit of info. The wing with the taller stands means you can see out your rear window completely unobstructed.

 

Here's a video from Saturday, quality kind of sucks. The external gps looks like it had a bad signal, not sure why. Surprisingly the turbo seems kind of quiet on video, it's pretty loud in car. Performance wise the car has a lot left in it. I was short shifting and letting off early in spots but should've run in the 142s w/o traffic.

 

Awesome work! Track day on a new turbo setup and no major issues. What oil were you running? I've been a big fan of Motul 300V. I've found it to maintain viscosity very well with thermal loading.