Plavan's 818R Build Thread

[Hindsight]

Looking good as always. Can't wait to see your track report in a couple of weeks. Wish I could be there in person!

[RM1SepEx]

Chad, How thick are those tie downs? They look like 3/16 thick steel

[C.Plavan]

Chad, How thick are those tie downs? They look like 3/16 thick steel

Yep- 3/16th steel.

[metalmaker12]

No problem.

818R guys may want to consider these tie down mounts. I have them on my Porsche and it makes trailering a breeze. I mounted them on the rear spindle. I'm hoping the same goes for the 818R. The hole is slightly bigger than the M12 bolt, but with a washer and everything torqued down everything will be fine (66 ft/pounds). Its not going to go anywhere. I bought the 45 degree models from Rennline.com





I'm going to look at adding some to the front also. I'm just running out of time right now.

I like these, but when u went on site I did not see this style, what's the part number bro.

[metros]

Those tie downs are pretty nice. I'm going to pick up a couple to use for transporting my 818.

Should be plenty strong for a tow hook up if necessary, right?


*Edit * Metal - they're within body & exterior then click on tow hooks and tie downs. They're universal so should come up with any of the porsche models. I don't see a part number to reference on the site.

[C.Plavan]

http://www.rennline.com/Rennline-Tie...oductinfo/E04/

Black Friday code BF12-

[D Clary]

Which panels do you leave out for the door vents, still thinking about them, I can see that with all of the panel in place there is little way for the air to get out of the nose.They are the only aero pieces that I do not have. I was kind of hoping that FFR would go back to the wind tunnel to check the pieces like they did at the start.

[Frank818]

These tie-downs, when the car is towed, it doesn't rub on the diffuser? If yes then it means the towing cable is probably at the same angle as the car is.

EDIT: By "if yes", I meant that is was NOT rubbing.

[C.Plavan]

I worked on the car all day. I'm getting excited for next weekend. I had my hand in just about everything today including panels, messing with the springs, bleeding the brakes, trimming some fiberglass, installing the GPS module and running the cable.

I will be grabbing my scales from my buddy tomorrow. I will be corner balancing it over the next couple days after work. I'm going to see how much the quick pig weighs. I also need to finish installing the graphics/decals also.

Reminder to those with the R- Make sure to buy 4 1/2" grade 8 bolts for the rear shocks. The longer bolt goes through the shock tower brace AND shock at the higher "R" hole. It's nothing like the 818S rear shocks.


Added my iWire decals I have my ECU mounted on the drivers side of the firewall. I feel it is more protected from heat that way.

[Frank818]

So those tie-downs are not too far in (forward) underneath the car?

[C.Plavan]

So those tie-downs are not too far in (forward) underneath the car?

It just depends where your trailer tie downs are. They should work fine on my trailer going straight and not X'ing them in the rear.

[C.Plavan]

Those tie downs are pretty nice. I'm going to pick up a couple to use for transporting my 818.

Should be plenty strong for a tow hook up if necessary, right?


*Edit * Metal - they're within body & exterior then click on tow hooks and tie downs. They're universal so should come up with any of the porsche models. I don't see a part number to reference on the site.

I'm just using them specifically for trailering, not tow hooks. They can just tow with the roll bar hoop.

[Frank818]

Hummm... tnx for that Chad. I think I'll hold off for now. A normal towing and the one I use (guy I know) is a ramp dropped at an angle on the floor and then pulls with a cable. I guess until the rear wheels are on the ramp the cable may hit the diffuser.

Like this:

towing.jpg

[C.Plavan]

Hummm... tnx for that Chad. I think I'll hold off for now. A normal towing and the one I use (guy I know) is a ramp dropped at an angle on the floor and then pulls with a cable. I guess until the rear wheels are on the ramp the cable may hit the diffuser.

Like this:

towing.jpg

These are just for tieing down Frank...... not pulling up a ramp trailer. With the R's I just attach winch cable to roll bar and pull away.

[Frank818]

Oh crap! Now everything makes sense! I thought you were using them to pull on a ramp too.

The idea of the roll bar is interesting, haven't thought of that. I'm buying it. How much is it (the idea)?

[Brando]

I also use the roll bar for winching/towing. Works great with the mini windshield. A full windshield would be an issue however.

EDIT: By towing I meant towing off a track when needed. Not towing to/from the track. I love your idea for the tow hooks, another great idea of yours I plan to use.
What are you using to secure the front?

[Hindsight]

Chad, will you be taking video of your test runs next week?

[C.Plavan]

Chad, will you be taking video of your test runs next week?

Of course. That way you guys can feel my exhilaration, or shame of defeat.

[D Clary]

Looking forward to hearing about a successful outing. The stories of everything was great until .......l or it was really fast but then it....... are making some folk nervous

[C.Plavan]

Survey says........


I figured it would be around there. It has about 4 gallons of gas in it. Its pretty well balanced without me in it..... darn. I'm going to have to play with the springs.

With me in it without messing with the springs yet: Not a bad starting point.

[wleehendrick]

I'm going to see how much the quick pig weighs.

At least under a ton... you owe her an apology!

[C.Plavan]

At least under a ton... you owe her an apology!

True. I built the rear wing mount/bumper to withstand a hit. I think that anyone racing wheel 2 wheel should do the same. I'll take safety over weight every time. Side intrusion panels, Dry Sump with extra oil and lines, fire system, AWIC, little mods here and there all add up. I'm fine with coming under 2000 lbs ready to race. Now its time to beat up M3's and Corvettes.

[Santiago]

True. I built the rear wing mount/bumper to withstand a hit. I think that anyone racing wheel 2 wheel should do the same. I'll take safety over weight every time. Side intrusion panels, Dry Sump with extra oil and lines, fire system, AWIC, little mods here and there all add up. I'm fine with coming under 2000 lbs ready to race. Now its time to beat up M3's and Corvettes.

Soooo very close to how my build is going. Good to get the numbers. Really, despite the fact they call it an 818, this is a pretty light car all things considered. And I think you made the right move adding a bit of weight for safety.

Thanks again for sharing. Enjoy the M3 hors d'oeuvres and Vette main-fare. =)

Best,
-j

[Santiago]

I installed the flat bottom engine tray and diffuser. ... I'm going to extend the diffuser fins back towards the motor/where is angles up at a later date.

Just a thought, but you might want to just leave them where they are now. I suspect that with all the other noise going on it won't make too much difference, but here's a pitch for their current position. In theory, the fins are there to define smaller volumes for the air to flow. You want a larger total volume to flow through the diffuser, but that lands you in trouble because air likes to just chill when it flows into a larger volume (read: it loses what bit of laminar flow it has enjoyed and becomes increasingly turbulent). So you divide up that increasing area into smaller elements. This allows you to get more volume w/o losing the laminar flow.

Ok, so here's my thought. While the air is squeezed under the car, it's all pretty happy with a nice flat bottom to flow along. Just aft of the main chassis, it encounters a slightly enlarging area (defined by the engine bay panel). It's probably still pretty happy flowing along that, since it isn't much of a difference from where it came. Now it hits the diffuser and start to enlarge even more. Again, it's probably still flowing pretty well. Things are apt to get dicey the further along you go - which suggests that you want to think of controlling that flow in the area of the diffuser with the largest volume. That's where the flow is in the greatest need of control. So my vote is for keeping the fins where they are now.

Of course, if I'm wrong about the air still flowing nicely around the entry of the diffuser, then it's jacked up entering your fins and their job is damage control from that point (but the damage is already done upstream). In this case, you would be better off moving the fins forward to prevent the flow from detaching from the engine bay/diffuser entry. Damage prevention is better than damage control.

We just don't know yet which situation we're in w/o some tests. Wool tufts and a Go-Pro would be nice... I still think you're in the first situation, but we're guessing here.

Best,
-j

[C.Plavan]

Well, here goes nothing...... She is all loaded up. Make sure to pray to the Motor and Anti Gremlin gods for me. I hope I have good news tomorrow, but I know how testing a new car can be. Fingers crossed.

Still waiting on the hood Martini graphics-







BTW: Those rear tie downs work great.

[FFRSpec72]

Have fun, best of luck, hope all goes well.

[Hindsight]

Outstanding! Wishing you good luck and a successful practice day with no bad surprises!

[Mechie3]

Woo hoo ! In for some videos.

[mikeb75]

Best luck on the maiden voyage! Looking forward to videos & report.

[GUNS]

Good luck! BTW, I want your trailer...

[D Clary]

What do you have the front tied down to? Good luck!

[C.Plavan]

Misfire codes. Booooo. Anyone know if the cause could of been a low gas tank?

[Scargo]

I do believe if it starves very long it may, or go into limp mode. Did it reduce boost/power?

[Wayne Presley]

Are you logging fuel pressure?

[C.Plavan]

Just got home. I'm beat. I'll go into detail after I rest.

I'm James (real name on driver license)



I could only muster a 2:01 with the Stock WRX TD04 trim. I probably could of shaved a few more seconds off, but traffic was everywhere and these Yahoo's were throwing mud on the track. I'm wanting more power already.

Nutshell- Seems like the car survived But I am having some serious boost creep issues. To a point where the ECU would cut gas. it only happened about 4 or so times, and was random. After the 4th time, I said enough- I'm not risking it. It only happened in 4th gear I believe. I'll look at the logs later. Hopefully I did not hurt the motor. It hit 18 pounds of boost when it should of been around 16. After the first time I threw 110 octane in it.

Very fun car, but I thought it would be faster. I think that has to do with the TD04 (fell on its face after 5500 RPM). Then again, I'm on Toyo's and not my normal Hoosiers. I'm probably not trusting the Aero fully yet since I have never driven a car with such downforce.

I was chasing gremlins, but still had fun. Everyone loved the car.

I had high speed aero push in one corner, the rest was good. I will take a degree or two out of the rear wing next time. I started at 9 degree AOA. It was just hard to judge because of all the cars out there.

[Hindsight]

Congrats! Glad everything went well. I too noticed the stock turbo runs out of huff early (when test driving my donor). Obviously a tradeoff for better low rpm power for the street, but on the track you don't need that comprimise. Time to go turbo shopping

What kind of times is your RS putting down on this track?

[Santiago]

Hey! First place! Faster is always nice, but a great start even with the gremlins! Congrats!

Lap times are surely to drop, so I wouldn't put too much stock in that right now. And high-speed push at 9deg AOA was almost a certain thing given FFR's experience.

Best,
-j

[Brando]

Glad you made it back with a running car! I'm sure many will find comfort in that fact.
Chad, what track config were you running at Buttonwillow?

Were you running advanced group with Extreme Speed? You must have been getting caught it some mad traffic with that spread.

[metalmaker12]

Awesome !!!!

[Erik W. Treves]

nicely done....yeah the stock turbo is nice...but limiting...not designed for what you are wanting...but great proof of concept....now you have a great baseline to move off from!!! should make this spring very fun!! be safe!!