You don't have to be an aerodynamicist to make effective modifications if you have some knowledge.

Their work is theory.

At the pinnacle of motorsports, no 2 F1 cars reach the same conclusion within the same rules parameters.

If aero was all science, all of the cars would be identical.

 

Agreed. While there are basic principles that can't be denied. There are also aspects that mean one size doesn't fit all.

 

Yeah, and unless you are in some kind of time trials (or maybe here withing PCA racing, "GT") most of the avenues are off the table.
Rear wing can only be xx within width of body + xx below roof line, front splitter extends no more that 3" beyond bumper, etc, etc.

On a totally open car, twin concave tunnels, one each side of the torque tube, well deigned diffuser, offset front fender (at rear), sealing rockers and I'd channel the firewall for under hood pressure exit over windshield/roof to rear wing.
Too bad we can't even have a diffuser.

What is status of your car...?

Ever find out the failure...?

Too much torque broke the block via engine mount arms..?

 

In brief as not to derail this thread any more. With respect.

Agreed.
Agreed mostly in principle but each car needs specific attention to eke out the most efficient aero package.
Collects dust.
Nope.
Perhaps.

 

Why wouldja think you be de-railing?
After the engine and driveline, Aero is the make or break..........
The discussion is fantastic.


He was going wicked fast. Stuff breaks.

 

Your 944 has a very large rear spoiler as well. I would think that the front splitter on a stock tailed car wouldn't have to be as large as your, since you are essentially also fighting rear down forces. That are pushing the rear down.

 

Yes, for sure. However it was our uneducated assumption that the 1st version of the front splitter/dive planes would do a pretty good job of balancing the rear. We were wrong.

 

 

With my car, I know for a fact that I can be well into pulling hard in top gear well before having traveled a mile..
I've never pulled 5th gear all the way out because I don't trust the tires to not explode, but I have not felt instability, and it just keeps on pulling..

A narrowbody 924 has quite an aerodynamic advantage with a very low frontal area.. A 924 is the current holder of landspeed records in classes SCTA, ECTA and LTA G/CPRO..

I calculate my car will reach 160MPH in top gear at my normal shifting RPM and would probably crack 170MPH before it was time to throw rods, with my current RPM limits, gearing, and tire sizes..
I also think I am running around 100HP MORE than that landspeed record car (its an NA), and I'm looking for possibly another 50-100HP our of my car as my build progresses..

Looking to put together a turbo that will make a comfy 25psi for me without being completely off the map..
Trying to source a compressor that'll do the job..

I'm not looking to go 190+ MPH, but if you want to, you might want to build in a narrowbody rather than any 44-68..
Weighs less too..

More tinkering and investing to do, but I'm pretty sure I'm already in the territory of giving most 951s a decent run for their money..

 

I've been a believer that some years ago, the 944T became a [cult car]. Some who own other makes of Porsche's but observe the 944 nether world don't protest too much: "Oh they're cult cars all right. That and a few other things."
We lost most of the great project threads nigh 9, 10~12 years ago:
night and day from then. .
That's to be expected for a challenged interference design, do this or else maintenance, & poor working computers.
But some project threads seem to spin off into [a score of side topics that go on and on],
then another side topic crops up, more weeks/months go by.
This can go on for years, before someone asks, 'what happened: is it running yet?'
(after like 8, 9/pick a number years).
Are there many cars running the oem engines anymore or
is the 07K the new rage?
Any luck with the Audi swaps?

 

I think there's a decent amount of projects out there right now in the 944 Turbo world. They're going up in value. The stock ones are. So if you want to add value with a modified one, it has to be pretty special. my car has been appraised at over 6 figures. That said, I've done 194 miles per hour in my car with my old hp and tq in my sig. It's now back in a secret place getting some serious **** done to it. Paint as well and I didn't really need it. Window out custom in factory Porsche black. Clear, wet sanding, more clear. etc. It's been gone a year. I just want it perfect. Everyone wants to race them. I want to beautify the care and show case it's curves and style while kicking the daylights out of anything that pulls up next to it. Including the Mclarens. I'll be able to do that. But I probably have almost 300k into the car since 1997. Thank God my clients from my little night life gig paid for most of it. I hope to have it back in August. I can't wait to show you guys.

 

Don't see an issue with finding a turbo that likes 25psi and in a manageable area in the curve. But the same old issues remain. Keeping the head down. For a road car it is way easier as you're on boost for much shorter periods of time.
What are the details of your build?

 

Big intercooler, Big fuel, not quite big enough turbo (bought a k27 comp just now though)..
Basically a stock 931 engine with ARP head studs.. Usually run DD around 1.4-1.5 bar and has ran up to 1.7 Bar of boost for quite a while now with no problems.. Will only hold about 1.5 to redline though..
I'll keep trying to stuff more air in there and see what happens..
Yeah road car..

I'm working crazy hours across the country now so I don't have time for anything lately..
Bought another 931 just now so im really screwed for time for both of them and haven't decided what to do to/on each of them yet..
In a perfect world I'd develop them both but who knows.. The new one, I kinda don't want to blow up.. The old one, I have been trying to blow up for a long time, lol..

 

So 2ltr 8v? Have you done much to the head?

 

Yes, 924 engine, 2.0 8V..
Nothing at all, all stock.. Stock head gasket even..

Only thing changed is put on a big front mount intercooler, upgraded the fuel system to virtually unlimited fueling capabilities completely AFR tunable with megasquirt, BR9ES plugs, and swapped on a 2667 compressor which I've maxed out..
It's really all OEM other than fuel and air..

AFRs and IAT nice and low.. Seems it'll take it.. So far..