Time Trial Build Thread (aero, widebody, any other nonsense)

[steved0x]

Originally Posted by truegearhead

I do eventually want to put some wheels on the car that fit, unfortunately (as you pointed out) 911 wheels won't work. I actually have 18x12" wheels on the back on my 911, all of the extra width is on the inside of the wheel. This is possible on 911s since they have a multi-link rear suspension and don't have the long track arm that gets in the way of the wheel. If anyone knows of a cheap 17" wheel that can be ordered in custom offsets please let me know.

I don't know how these offsets would work or how "cheap" but here is one wheel you can get in configurable offsets:

https://momo.com/en/product/heritage/road-wheels-heritage/heritage-6/

I have a different set of Momo 3 piece wheels (I haven't been able to identify the model #) that have a pretty big "back" barrel, you could possibly reassemble with the barrels reversed and have the bigger barrel be out the outside, they would be pushed out more than 4", and I could take a measurement and see. They are approximately 17x10 and 17x9 (from a Cayman IMSA GT 2.9), I was going to run them on my Cayman but doesn't look like I am going to have my tire trailer hitch resolved anytime soon and so these are just sitting, $800 plus shipping (what I paid) Next time I get to my storage I'll measure the barrel widths and send them to you, if that might work?

[truegearhead]

Originally Posted by steved0x

I don't know how these offsets would work or how "cheap" but here is one wheel you can get in configurable offsets:

https://momo.com/en/product/heritage/road-wheels-heritage/heritage-6/

I have a different set of Momo 3 piece wheels (I haven't been able to identify the model #) that have a pretty big "back" barrel, you could possibly reassemble with the barrels reversed and have the bigger barrel be out the outside, they would be pushed out more than 4", and I could take a measurement and see. They are approximately 17x10 and 17x9 (from a Cayman IMSA GT 2.9), I was going to run them on my Cayman but doesn't look like I am going to have my tire trailer hitch resolved anytime soon and so these are just sitting, $800 plus shipping (what I paid) Next time I get to my storage I'll measure the barrel widths and send them to you, if that might work?

Hell ya! Let me know

[truegearhead]

I took a break from engine work and started on the trunk. I had to ditch the lexan trunk since it probably would have melted so I'm back to the old steel trunk. I was able to pull about a third of the weight off of it by skinning it and cut the first of two holes for the turbos. There will be a hole like this on each side. I think its going to look pretty good once cleaned up and wrapped

[truegearhead]

It’s off the jack stands, it’s off the jack stands! As it sits it’s 17”s wider than stock😬





The Boxster also picked up a new stable mate...can you tell what it is?

[steved0x]

Do you have a thread with details of your wing (brand, size, etc) and how you mounted it? If not please provide details

[truegearhead]

Originally Posted by steved0x

Do you have a thread with details of your wing (brand, size, etc) and how you mounted it? If not please provide details

Sure! Unfortunately I have no idea what kind of wing it is, I bought it second hand. The only thing that was important to me was that it was no wider than the car (Time Trial doesn't allow it) and that the support were no wider than the trunk. Most people mount their wing to the trunk however my trunk is actually a thin piece of clear lexan from Lowes that I cut out with a jigsaw and then wrapped so I mounted mine to the trunk floor instead. The wing mounts weren't long enough so I cut some aluminum plates with the same jigsaw and used them to extend the mounts that came with the wing. The spoiler is made from a composite aluminum/plastic sheet that I made with...a jigsaw.



Here's the "trunk lid". Super lightweight and super cheap.

[Stroked & Blown]

You can search available wheels by size bolt pattern offset, etc here: https://www.1010tires.com/Wheels?activetab=bysize

Boxster bore is 71.6 so you could do anything that size or larger w/ hub centric rings.

[truegearhead]

While I'm waiting for the flares to come back from the wrap shop I installed the fender vents that I made a couple weeks ago. The fender flares fit right up against these so you won't be able to see the thin strip between the vent and the wheel well

[truegearhead]

I made onto the pelican parts DIY competition! Please give me a vote!


https://www.pelicanparts.com/support/spring2022sweepstakes.htm?utm_source=forums&utm_medium=post&utm_campaign=promo&utm_content=DIYcontest

[TexSquirrel]

Originally Posted by truegearhead

I made onto the pelican parts DIY competition! Please give me a vote!


https://www.pelicanparts.com/support/spring2022sweepstakes.htm?utm_source=forums&utm_medium=post&utm_campaign=promo&utm_content=DIYcontest

That's how I found this thread.

[truegearhead]

I worked on the trunk a little more this morning, I'll admit the photos don't look great put in person the turbos are centered under the trunk holes. It'll look much better wrapped too. Next up I need to install the mesh covers over the turbos and make the aluminum sides to the oil cooler vent

[truegearhead]

with video proof!

https://www.youtube.com/embed/kC-j2bTyntg?rel=0

​

[Gilles]

Originally Posted by truegearhead

​

I kept pushing the replay button.. your video is too short
Sounds awesome! Congratulations!

[truegearhead]

Now the engine is running I can work on some fun things. I got the dash/gauges working this week. It looks absolutely wild in person. Super happy the way it turned out. Definitely a racecar finish though, not up to street car quality but still cool.

[truegearhead]

The exhaust is finally done. The trunk is almost done (besides wrapping) and the new rear wing has been sent off to the water jet to be made. It’s coming together.





The wing is going to be a 70s IMSA style wing supported from the sides. I love the 70s IMSA cars and I don’t car if tech has improved, it’s just too cool not to do.

[truegearhead]

Over the weekend with tons of time on my hands I decided to redesign the hood extractor. When I was at VIR a couple months ago the air coming through the bumper opening was enough to cause the hood to bow up about an inch which shows just how much air and resistance this design was creating. To reduce drag I decided to close the bumper opening, cut a hole in the bottom of the car and built a front mounted diffuser so the hood could pull air from underneath the car (the splitter in not installed in these pictures). If only there was a track to test this out on... Its hard to tell from the photo but air would flow to the hood from the other side of the curved aluminum piece. I probably need to install a plate over the front of the bumper to hide the curve piece since air cannot escape into the hood or anywhere else

[Quadcammer]

pretty cool stuff. I love that you are willing to try **************** out, even if its unorthodox.

Talk to me about those naca ducts in the head lights. What size hose do they run to and how are you ducting to the brakes?

[truegearhead]

The governor just lifted the state inspection requirement so look who now has a street car! It attracted a little too much attention to be an enjoyable drive and its loud as hell but it was still great to get it out. With the exhaust on (which doesn't do much) the in-cabin air filter is deafening. I guess I've never heard it without a helmet on. Its incredible how much air engines take in.

[Quadcammer]

also, it seems you don't have a center radiator. What sort of temps are you seeing.

One thing I've thought of is using a WRX hood scoop on my trunk lid running to the trans and up to the heat exchanger. Might be a pain to route the hoses, but my car is not full track yet, so I haven't gone full nutso.

[truegearhead]

Originally Posted by Quadcammer

also, it seems you don't have a center radiator. What sort of temps are you seeing.

One thing I've thought of is using a WRX hood scoop on my trunk lid running to the trans and up to the heat exchanger. Might be a pain to route the hoses, but my car is not full track yet, so I haven't gone full nutso.

The NACA ducts use 2.5" (I think, I'll confirm later) hose to connect the rotors to the ducts. I hollowed out the back of the lights to make them work and then rewired the head lights to the fog lights so I can still see when driving around at night in the paddock. The turn signals also still work.

You're right I don't have a third radiator, my first approach on the car was to make it as light as possible so I wanted to avoid it. It doesn't overheat at all even on 100 degree days though. I don't have AC condensers blocking the flow and I cut the wheel wells out to let the air flow through the radiators right into the wheel wells (the factory design requires the air to turn and exit under the car) so I'm sure this helps out as well. Oddly my 911 (996 3.6) has the same radiator setup (no center radiator) and temps start climbing on the track on really hot days. I can't believe they didn't put a third radiator on all the 911s.

I'm trying to picture your WRX scope idea, are you trying to cool the transmission fluid?