UpFixenDerPorsche

Definitely lost somewhere. In (deep) Space sounds really good to me.



.

Koenig-Specials 928

Love the hood mod.

Harvey Yancey

Looks awesome ... nice work.

slate blue

Guys, not a lot of progress of late but it is certainly not forgotten, in fact some of the delays lead to better outcomes, this I think is because I am not a body man or designer so you need to carefully consider what you are doing as some jobs are you have one go out it and get it right or throw it in the bin.

The bonnet is getting a slightly bigger vent, the sides will be of the same design as the side of the head lights. So by having this similar style and it of course the headlights are also recessed,this hopefully ties these features together. For optimal cooling an aero benefit you would raise a lip before the vents to create a low pressure zone after the lip to further help air extraction. However due to the fact that all changes to panels on the 928 are recessed. Look at the scuttle panel, headlights, door handle and even the hatch glass I will stay with just recessed vents.

As to how to fit the bonnet vent, that is pretty tough, I dealt the distortion in the guards but they have curves which make life easier, the bonnet won't tolerate as much. There is no room to hammer and dolly the vents down the sides. So I was thinking about spot welding and epoxy which would be JB Weld as body adhesive seems to change with temperature. Then maybe you use the finished bonnet as a mould to make the skin in CF.

slate blue

Again a long time between drinks, better finish these projects before I bump off the planet. So I have had a number of iterations of a modified design that caters towards aero performance. I said wasn’t going to build an ugly car even if that meant down grading the aero for aesthetic purposes. I don’t know if you know this is not a five minute job, crafting metal into various shapes is not the easiest thing I have ever had to do. So with that said let’s revisit this project and what I am thinking design wise.


In the bin!

Looks like a row of stairs.

So even though this design would have been very functional, the aesthetics are poor, the back two vents were going to be feed by the engine bay from rear where I believe it will be high pressure.


This was one option

I thought about going with three vents and having nothing at the rear of the guard. Maybe this was ok?


Mock up of the final design.

Just roughed out at this stage.

It was a devil of a job to pull apart the previous design without doing too much damage. I will need to hammer and dolly these up a bit to tidy them up so please don’t be too critical. I am happy with the aero and design concept which I will now explain.

If you drew a curve from the bonnet/hood vent it lines up with the front of the guard vents, the rear of the second guard vent lines up with the rear of the bonnet vent, that is a curved line. The rear vent will take high pressure air from the engine bay. I do not believe that guard area to be high pressure and I will direct that air around the A pillar. There will be a very large GT3 style wing at the rear that will use this airflow.

So I acknowledge it looks rough currently but a work in progress, just have a look what a bit of paint can do. This is where I took the concept of the bonnet vent from. Remember this is the GT3 RS of the 928 that Porsche never built. It’s not supposed to be stock.



Reposting those photos due to Photobucket water marks…




Thoughts?

Kaplan69

I love " factory looking" mods!! I also plan on some aero improvements, but but not "too much" .. Time Attack looks are not for me... There is a super active, up to date FB page called Professional Awesome Racing Technical Forum, lots of helpful, friendly, uber-aero tech stuff... Don't be afraid to ask and post!! Ken

hernanca

I have found that to be the tricky part of design - ending up with unanticipated patterns!. Mockups can help catch unintended patterns.

Only area I wonder about is the front edge of the center hood scoop. I know it is curved, but I can't tell if it follows the front hood curve? If not, consider a curve at that location, as extrapolated between the front hood (or bumper) curve and the rear hood (or window) curve.

I love the fender top and fender side openings.

And I'm sure you have heard it before: do what makes YOU happy!

You have amazing talent!!!

slate blue

You are too kind! Even when I was making the vents I couldn’t tell that it was that bad. I discussed it with my son and we both agreed it wasn’t quite right. The centre vent does match the curve in the bumper bar, at edges it is more curved but that was a design necessity. The guard vents follow on from the main curve in the hood. We have some interesting and functional pieces coming for the front end. That being the splitter and integrated dive planes which again are sympathetic to the original design. I didn’t put any raised edges into design even though that would be more functional however the aesthetics would suffer.

Front hood curve