UTCC / Hyperfest 2018
 

We goin!
VIR May 18-20

Tire Rack Ultimate Track Car Challenge
http://hyper-fest.com/

I'll drive for UTCC, Dan and Sonny will team up for the NASA TT2/ST2 events. We're scrambling to get Vegas ready. For UTCC it'll run fool boost, make around 360whp, the Quafie sequential, 245/40 A7's and probably similar aero to what we ran at Superlap.
Back up plan if we can't get Vegas ready is to do the same prep to Bullet. No problems with Bullet but Vegas will be very more sexy time. Not sure of the final TT2/ST2 config but less front aero, 2250# and around 290 avg power with the sequential and same tires is a guess.
No idea how fast we'll go. Once we get the first shakedown done here, we'll issue a pointing-to-the-bleachers lap time to begin the talking of the smacks.

https://cimg7.ibsrv.net/gimg/www.mia...3fa6c4e3a1.jpg

Bauce.

It'll be like this, right?!



Pumped to see a miata at UTCC. :party: I'll be up there that weekend to be a cheer-leader for you guys and I'll be running TTE over the weekend as well. Maybe upset Kohler's old record :D

Assuming the Full Course, we think 1:51 or so, depending on what congig we bring.

I am so mad it is the same weekend as SOFR, rally Ohio. I was planning on being at hyperfest this year. Oh well.

Hell yes, it'll be awesome to see you guys run! You just made me look forward to Hyperfest so much more.

weekend before I go to Greece, but might be worth going out this year. too bad it's not in my backyard anymore...

Gahhhhh can't wait for this.

Looks like our wacky Super Lap aero will just squeeze into ST2. R7's for that. A7's for UTCC. Think maybe a top ten finish in UTCC is possible?

https://cimg3.ibsrv.net/gimg/www.mia...b970c1a334.jpg

I would think ~1:58-59 in ST2 trim and if you can squeeze out a 1:49 I think that would be top 5.

Spare motor dynoed here. It's a PT points BP4W. So basically 9.95:1 stock flow with rods, pistons, oil pump, damper, valve springs, ARP studs.
23-25psi here. Bottom plot is the same hardware with the smaller W/G actuator for S1.

Now to install the whammy BP6D, +2 CNC, big cams, 9.0:1. Not sure how much more we'll gain but I'd expect another 40whp.
More flow so peak boost will drop 1-2psi which is good. Less static compression and coated chambers/crowns/valves/exhaust ports so we can probably add another 1-2° of timing.
VVT will help it to spool faster. Cams and head will pay off on the top end. Still, the PT engine has a 2500rpm wide powerband. Can't wait to unleash this thing on track with the Quaife.

https://cimg3.ibsrv.net/gimg/www.mia...3074e2d7c8.jpg

We're wondering the same thing. Long ass straights. We'll look at data when we get there and decide if we need to trim out aero. For TT, track position doesn't matter so you don't need top end speed. Entry and min corner speeds equal lower lap times. I'm thinking we'll want all the downforce even if it hits an aero wall at like 150 or something.

Bullet does not have a flat bottom or diffuser. No offense but, I purposely ignore what other people are doing. Unfortunately the front arrow on Bullet is not adjustable. So if we reduce downforce, it's a one way street.

Frankly I'm excited about having all the downforce so even if it is a bit slow on the straights I will probably leave it that way.

No 295s on Bullet. It only fits 245 fronts.
We'll either run 245 square again, or 245/275 stagger if testing proves it to be faster with all this extra power.

I think the aero will prove to be super beneficial in.... the up-hill esses, I actually stay track left on entry to cut distance in my car. T10, the FAST left hander after esses. And hog pen(T16/17) which is of course important because it's the start of the front straight. I realize the crowd I'm talking to, so this is just me thinking "out loud". :party:

I hope to make it over there late Thursday evening to camp and be able to catch Emilio and Ryan doing UTCC on Friday.

The culprit

https://cimg9.ibsrv.net/gimg/www.mia...bc865da927.jpg

No ACE's?

I am debating coming up and BBQ some meat for you guys.

In for VIR video.

And by debating, he means he is debating on which "meat" he'll bring for us :D

I'll be there with the crew. Its a great party every year!
Friend is entering a burnout contest car.....

I'm guessing we will not win this again this year.....lolhttps://cimg9.ibsrv.net/gimg/www.mia...ebad45cff4.jpg
Car was in PTE trim.

The crew sent me a pic from testing this morning at WSIR:

Superlap front end received some spray paint.
Only difference otherwise is the new ginormo wing endplates from Singular Motorsports.

Underneath, it received a slew up upgrades from our previous Time Attack setup:
ID 1700cc injectors, DW300 pump on a standalone circuit.
LSx ignition coils
The above, give us the headroom for over 400whp on e85 out of the same EFR6258 turbo and Trackspeed Engineering hardware we run in Supermiata S1.

Xida Race Triple adjustable. 1400/600lb
Quaife QBE60G Sequential
3.6 or 3.3 Supermiata tuned OsGiken LSD depending on the track.
We're going to test a staggered setup since these front fenders don't clear 15x11" wheels: 245/275 Hoosier A7 on 15x10 and 15x11 949 Racing 6UL wheels.

https://cimg4.ibsrv.net/gimg/www.mia...115fac774d.jpg

Gonna be a good day.

Testing at WSIR yesterday we had trouble controlling PCV. Our previous setup was capped cold side, hot side vented to a Moroso catch can. Worked fine at 300whp/15psi with the 4W head. At ~24psi/400whp on the 6D head though, it would blow heavy oil laden vapor right through the separator and out the breather on the catch can. Lots of it. We played with a few different routing configs, restrictors, flipping sides. We only succeeded in covering the engine bay and left side of car (nice hood vents) in Amsoil 10W30. So today we tapped a -10 into the cold side of the pan, up front in the non-submerged portion. Ran that through a -10 hose to the Radium separator on the pax side firewall. Plugged both ports on the valve cover. Tapped new -10 port right behind oil filler cap and routed that to the separator. It seems that if you make enough boost even on a fresh engine, the slight positive positive crankcase pressure blows any vapor out the path of least resistance at fairly high velocity. So it never drops out of suspension despite several bust stop chicanes in the catch can. We measured 0/0/0/1% leakdown so the motor is bitchin. The strategy now is to let it blow the vapor through but make it lowest resistance path a big hose back to the front of the sump and not the breather. We have an alternate drain hose plumbed with a zero cracking pressure roll over valve made for off road fuel systems. We'll try it first without the check valve. Through all this, the engine never burned a drop or smoked, but it did pump about 2 qts through the vent in the catch can in maybe 15 laps.

Oh and good god is it fast. It makes Willow Springs feel like an autocross and that isn't hyperbole. I actually noted my head sharply slamming against the seat sharply enough to momentarily disorient me, when I rolled on the power in 4th going up the hill into the Omega. Must repect the torques..

So no complete laps yesterday at WSIR. New PCV system is in. Going back to Streets of Willow tomorrow to see if it works. Fingers crossed. If it doesn't, we'll pull another all nighter to put the 4W (spare) back in. Load up Monday am and off to UTCC.
Think happy thoughts..

https://cimg1.ibsrv.net/gimg/www.mia...0d4ba2c568.jpg
https://cimg2.ibsrv.net/gimg/www.mia...e1fce7f7ca.jpg

Flailing around trying to come to adjust to the power. Still did a 1:18.17 with a solid push everywhere, missing apexes and basically not using all the available grip. Windy today. Probably a 1:15 in it once we get handling dialed in and comfortable with it on a less windy day.

PCV issue 90% resolved I think. Still blowing a tiny bit out the breather but only after 4-5 hard laps. Friday it would send 1/4 qt per lap. We will add a catch can to the vent and see if that manages it completely.

Is this with coolant routed to the AOS?

Not yet. That's mostly to burn off water vapor which is not a problem yet.

So it's still blowing more oil out the Breather than we would so we are going to put a check valve in the drain line. It's a separate line that we assembled last night so just swap in the new one with a rollover valve in it. Needs to have basically zero cracking pressure so the oil Mass draining out of the separator can open it and flow into the pan. Any positive pressure in the crankcase will close it so any oil in the line cannot be pushed back up the tube, which is what we think is happening.

We really don't like how long that assembly is and all the new failure points but it is what we could build with parts that we were able to purchase on Saturday with such short notice. If the check valve makes our PCV work 100% then we will build a new one that is much simpler.
https://cimg5.ibsrv.net/gimg/www.mia...f76fe27243.jpg

Check valve was the ticket. Zero oil out the vent, everything running back to drain. Staggered 245/275 didn't work. Wouldn't rotate. Couldn't fit the 275's under the front fenders, so we went back to 245's all around. Raised rear a bunch and finally got it to rotate. Going to install the Small Fortune 5/8" 3pc rear sway bar and see if that gets our balance dialed.
Managed a 1:17.9 with about a 25mph wind blowing. I think we are ready.

https://cimg4.ibsrv.net/gimg/www.mia...60263fcc24.jpg
Check valve was the ticket. Zero oil out the vent, everything running back to drain. Staggered 245/275 didn't work. Wouldn't rotate. Couldn't fit the 275's under the front fenders, so we went back to 245's all around. Raised rear a bunch and finally got it to rotate. Going to install the Small Fortune 5/8" 3pc rear sway bar and see if that gets our balance dialed.
Managed a 1:17.9 with about a 25mph wind blowing. I think we are ready.
https://cimg0.ibsrv.net/gimg/www.mia...d88f569ad6.jpg

Wow. That is nuts.

I think the fastest a time attack car has gone there during an event was FXMD NSX in 2009 at RTA, which was a 1:18.555. The fastest GTA record is a 1:19.397 by Jeff Westphal in the GST Subaru "L" in 2011. That car has progressed a ton since then and never been back but still, impressive.


Edit: NVM thought you were still at big Willow. But pretty close to SOW Unlimited AWD record by Lyfe GTR. Only 0.9 seconds off.

I did a breather in the same place on the oil pan, but hot side. At PIR (all right turns) with way less power and grip I puked a quart of oil into my engine bay. There is a cast flat spot on the blocks right above that that used to have a breather on the gtx wrc cars. That might be a better place (and it's where bbundy has his tapped)

Sounds like it worked for you on a test day though, so maybe I just had bad luck.

Picture of casting

https://cimg8.ibsrv.net/gimg/www.mia...e2aab7e84e.jpg


Failed vent location

https://cimg3.ibsrv.net/gimg/www.mia...283d8c9992.jpg


Where I drilled and tapped (but haven't tested yet)

https://cimg6.ibsrv.net/gimg/www.mia...78ed850b76.jpg

Or you didn't read the part about the check valve?

I read it, but my understanding was there was another drain line with a check valve, might have just been me misreading though.

By "alternate drain hose" he meant like an additional one assembled but not on the car, that can be swapped out to test the theory. Sounds like the one with the check valve worked and result was oil stayed where it was supposed to, the one without did not work and result was oil everywhere in engine bay.

Mmm. Makes sense.

Got bunch of clean laps today so I'll have some good video with data tomorrow. We are also concerned about the E85 that has always pooled in the catch can when the engine is warming up. Normally I just drain that after warmup then ignore it for the rest of the day. Now that might be draining into the sump. So the heater might help or maybe closing the drain during warmup then somehow siphoning it off before going on track. Still work to do but at least it's not spraying oil all over now.

Hey, don't forget to bring rain tires..... ugh.

You could always add a 2nd DTA, drain to atmosphere. warm up, ditch your water vapor, then run the rain to the pan while racing for oil vapor. Talk about a complicated system though.

225/45/15 H20'S will be ready if needed.

Ecu controlled valve, after warm up dump catch can and switch to pan drain. If you really want to be complicated.

It's been a lot of long hours to get the new front finished in time for UTCC (original deadline for next event was June). New GT1000 wing at the rear to balance. Tested Friday at WSIR with the 949 guys. Mega grip, doing 1:27's while just cruising and doing systems check on cycled RC1s.

Lots of scraping, ride height was a little too low. Lost a CV joint boot on the right axle which ended the day, but I had found the weak points that needed correction so it was job done. Sat/Sun were long days. Built struts to support the rear endplates (GT1000 is an animal, serious suction under that wing, Emilio and I were both bending the endplates through T8 and down the front straight). Resized the front endplates, made new titanium wear strips for the front endplates with rounded edges to reduce the shock when they scrape, added an additional mounting point in the splitter with corresponding mount in the frame (good problem to have, tons of downforce), pulled the axle and replaced the boot, raised the car a half inch front and rear to improve clearance. Got it buttoned up last night and the car's with 949 now.

Three days to catch up on sleep. I'm not stoked about the weather forecast.

https://photos.smugmug.com/2018-Even...MG_9343-XL.jpg

Got dem, you guys ain't joking around with aero mods in a short time-frame! Anxious to see both of these cars in person and run on track.

I wouldn't read too much into the forecast, it will definitely change between now and this Friday. Most spring t-storms around "here" are random in regards to area and sometimes even sporadic. The old "if you don't like the weather, just wait 30 minutes" saying.


But yeah...... bring rain tires :D It's a fact, if we're all prepared for rain, it won't happen.

I'm liking those endplates.

I wish I could make it back to VIR this year. Very challenging track.

Hoping this forecast holds out. Standing water on that track plays to our strengths.
https://cimg0.ibsrv.net/gimg/www.mia...6be7205fa1.jpg

Emilio is busy loading, I'm sure, so I'll clarify here. The drain-back catch can (Radium AOS) is something we've had installed and functioning on a 300whp BP6D test car for about a year now, and I briefly described it to Emilio and John on Friday over the phone to help alleviate the problem.

Not quite. The issue, as Aidan unintentionally alludes to below, is that if the drain is above the level of the oil (as it is in your case), the drain hose becomes a vent hose. The hose is larger and the vapors have to blow straight up, so less comes out, but you'll still get something out of the "vent". The goal of the check valve is to seal this hose when there's positive pressure. If you submerge the drain hose under the level of the oil in the pan, you can get the catch can to drain even with positive pressure in the crankcase. The oil level in the drain line and the oil level in the pan will want to naturally equalize. In that case, the check valve becomes an insurance policy, since under high cornering loads, the drain can become un-submerged.

The MSM's AOS drains back through a really elaborate, expensive tube which traces all the way down into the very bottom of the pan, which is a good indication of the importance of keeping the drain hose submerged as often as possible.

In our initial testing, we ran it without the check valve. and the problem got better, but it still wasn't solved. The check valve was the secret sauce.

It's a drain line, not a vent. The vent is from the top of the valve cover. See above

So boring

wow that turbo responds well. lol at boring.

Lunacy :party:

Down the hill through the kink is bonkers. Kudos.

Just for a reference, what's a S1 or S2 run there?

Haven't run S1 there yet. Probably 1:21 or so. S2 record around 1:26.2 IIRC

So wow, ok.