markrolston@mac.com Posted May 1, 2021 Author Share Posted May 1, 2021 3 hours ago, rossman said: The tail lights looks pretty cool. What's your plan for the center opening? You mentioned air flow. Where is the air coming from and how's it going to get there? thinking of opening a hole in the wheel well then fabricating a tunnel from there to these lights. Quote Link to comment Share on other sites More sharing options...
260DET Posted May 7, 2021 Share Posted May 7, 2021 On 5/2/2021 at 6:17 AM, markrolston@mac.com said: thinking of opening a hole in the wheel well then fabricating a tunnel from there to these lights. That could work to fill in the low pressure area at the back then again wheel wells are low pressure areas too. Tricky. Quote Link to comment Share on other sites More sharing options...
tube80z Posted May 7, 2021 Share Posted May 7, 2021 On 5/1/2021 at 1:17 PM, markrolston@mac.com said: thinking of opening a hole in the wheel well then fabricating a tunnel from there to these lights. The flow by the time it gets to the back of the car is a total mess. If you want to extract a better option would be to create a vent behind the spoiler and wing to help extract any high pressure air. Ideally your duct would be on top of the tire somewhat forward of centerline. This is where you'll see many of the fender louvers on race cars. This could all be done and contained in a duct that can be bonded into the inner fender. I'd run some pressure taps to see where the high pressure is and if the differential is enough either for the side exit to work or a rear exit. You don't need to drill any holes in the car to do this. Another option is to make sure you have the front of the tire/wheel combo not exposed to the airflow. You can create spats or s-flaps that can be used to aid in extraction. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted May 7, 2021 Share Posted May 7, 2021 (edited) If you look at many of the Time Attack cars, the 911 RSR, etc you'll see that a lot of them just cut the bottom half of the fender off and leave it wide open. I have considered doing something like this, haven't committed yet because it's pretty drastic, but will probably get the itch one day and attack my car with a cutoff wheel (again).http://www.dsf.my/wp-content/uploads/2016/11/porsche_911_rsr_2.jpg Edited May 7, 2021 by JMortensen Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted May 12, 2021 Author Share Posted May 12, 2021 thanks for the advice. I'll certainly do some testing first. Anything I do will first need to be subtle enough to not force a drastic change in the classic form of the car. I'm trying to tread a narrow path between modern tech and an old-school car. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted May 13, 2021 Author Share Posted May 13, 2021 Still working on the lights. Rest of car is done. Going to make some videos soon to walk through the build. Also just registered to bring both Z's to the August Zcon in Colorado Springs. Should be fun. Quote Link to comment Share on other sites More sharing options...
260DET Posted May 14, 2021 Share Posted May 14, 2021 On 5/13/2021 at 1:03 AM, markrolston@mac.com said: thanks for the advice. I'll certainly do some testing first. Anything I do will first need to be subtle enough to not force a drastic change in the classic form of the car. I'm trying to tread a narrow path between modern tech and an old-school car. Yes, we need the Z to still look like a Z so subtle changes that actually work are extra cool. If the car is configured to run air from underneath front to back and use it to improve aero, other than via the usual obvious diffuser, then that would definitely be extra cool. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted July 25, 2021 Author Share Posted July 25, 2021 (edited) I got some serious track time last week. It turns out the turbos and downpipes create some serious heat on the hood, despite the open space in the engine bay. I'm going to have to wrap them and come up with a nice shield. Too bad since it looked cool uncovered. Anyone going to Zcon in Colorado Springs this coming August? I'm trailering the car up there now that it's more or less finished. Edited July 25, 2021 by markrolston@mac.com upside down pics Quote Link to comment Share on other sites More sharing options...
260DET Posted July 30, 2021 Share Posted July 30, 2021 Mmmmmm, nice, what engine bay air extraction system does the car have? It's sooo important, both from a cooling and aero aspect to get that air out from there, at least as much as it comes in through the front. The design of which will challenge your original look requirement. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted July 31, 2021 Author Share Posted July 31, 2021 17 hours ago, 260DET said: Mmmmmm, nice, what engine bay air extraction system does the car have? It's sooo important, both from a cooling and aero aspect to get that air out from there, at least as much as it comes in through the front. The design of which will challenge your original look requirement. extraction: hood vents and the fact that the entire front end is just a tube frame. If that doesn't do it then down the line I'll put in some side vents and wheel well vents. But at the moment, I'm confident that basic shielding of the turbos will do the trick. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted August 6, 2021 Author Share Posted August 6, 2021 getting ready for Zcon in two weeks. Almost all done (never completely finished. ever.) 1 Quote Link to comment Share on other sites More sharing options...
1 tuff z Posted August 6, 2021 Share Posted August 6, 2021 Hey Mark, I'll be at ZCON and after all these years I finally get to see your Z in person! Look for me in the airport rental car, perhaps it'll make it on the track at HPR & PPIR... Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted August 8, 2021 Author Share Posted August 8, 2021 Took one last picture before loading the car up tomorrow. Looking forward to Zcon, especially getting some track time now that the car feels sorted. 1 Quote Link to comment Share on other sites More sharing options...
Nelsonian Posted August 9, 2021 Share Posted August 9, 2021 Looking so good and sooooo right... Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted September 4, 2021 Author Share Posted September 4, 2021 I took the car to Zcon in Colorado Springs a few weeks ago. Nice to see so many z-cars in one place. While I was there Larry Chen did a quick video about the car. It was cool to do a complete walkthrough of the build. Quote Link to comment Share on other sites More sharing options...
rossman Posted September 4, 2021 Share Posted September 4, 2021 Very cool and awesome car! Quote Link to comment Share on other sites More sharing options...
260DET Posted October 8, 2021 Share Posted October 8, 2021 We seem to be missing the track videos and chat. Quote Link to comment Share on other sites More sharing options...
DonH Posted October 20, 2021 Share Posted October 20, 2021 Mark, Your build is awe inspiring Quote Link to comment Share on other sites More sharing options...
DonH Posted October 20, 2021 Share Posted October 20, 2021 I also love and appreciate your no BS approach to this. Also your note about expanding foam. Im going to be doing this now on my LS Build!! I LOVE IT. What do you protect the outside portions of the engine bay when using expanding foam? Im thinking of making an engine cover with this approach. Quote Link to comment Share on other sites More sharing options...
markrolston@mac.com Posted November 18, 2021 Author Share Posted November 18, 2021 On 10/20/2021 at 12:42 PM, DonH said: I also love and appreciate your no BS approach to this. Also your note about expanding foam. Im going to be doing this now on my LS Build!! I LOVE IT. What do you protect the outside portions of the engine bay when using expanding foam? Im thinking of making an engine cover with this approach. Use painters plastic sheets to protect everything. Even then it’s super messy. But it’s so cool to fab this way. I recall someone building a full custom dash by using expanding foam to make a form then shaving it down, Quote Link to comment Share on other sites More sharing options...
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