Mike, my stock splitters (I have two copies) don't have any recess. So, I guess things vary over time...

 

The cup splitter may not come with tape, but I recommend you buy it and use it if you want the splitter to stay attached! Porsche can supply. It's 3m double sided tape.

 

Hey Mike next time we'll pal around with corner workers so we can retrieve the splitters in between sessions. Or else just go off again and retrieve it like a golf ball from a golf cart.....

 

LOL Dave and pick every other one at the track. We would have a load of spares or list on craigslist : )

 

has anyone found or shown that the stock 996 gt3 splitter makes much difference? I'd be interested to hear if you've foudn it hurt/helped grip or top speed etc...

thanks
HW

 

The front lift coefficient can be reduced by the stock lip.
You should leave it there and use 2-3 bolts in the middle to mount it. I lost a couple before.
The cup one is marginally better.

To give you an example of what the stock lip does, note that the new 991 has from the factory a front-axle lift cAF of 0.04 and the same car just by adding the sport PASM which lowers the front by 20mm goes to a cAF of 0.02.

If you want to add real front downforce and not just minimize the front lift of the 6GT3 you should close the bumper's bottom openings, tilt the radiator and allow (hot)air to exit from the top bumper holes of your RS bumper.
And you can also use an even bigger aftermarket lip.


https://rennlist.com/forums/996-gt2-...ml#post8874839
https://rennlist.com/forums/8877695-post15.html

 

My solution is to use double sided tape between the pushpins + a bead of black silicone between splitter and the bumper. The result looks very professional (at least on a black car) and the splitter is held on tight. On top of that, you have a perfectly air tight seal, allowing the splitter to work efficiently.

One of the annoying things about just using the pushpins is that every time you scrape it, it gets pushed down a little bit, and you get gaps between the splitter and the bumper. I'm not sure how well the splitter functions in such a situation.

 

Once the spoiler has come off due to a trip over grass or a pot hole in the paddock or scraping on the way up a trailer ramp, then the seal of the double stick tape is ruined. As the spoiler SPLITS the air up and around your car at 100 mph the air splitting effect is enough to overcome the rivit strength and the splitter will fall off. Why you would keep buying new ones instead of asking a corner worker to get it for you between sessions is beond me.

 

My two cents............Fred spends a lot of time off track. What he must do with his Splitter preparation. Probably a good solution for the rest of us????

 

Thanks John - super helpful - looks like a great mod/cost ratio


I saw the list they coerced you into making - have you thought of ranking it by Bang/Zoom-for-buck?

 

Sometimes when the splitters are dropped, they get "found". I've got some great video of a 6GT3 splitter coming at me at 110 mph approaching the esses at VIR.

 

That's nasty. : (

As I said, everybody should use a couple of bolts.

 

The Mk1 cup bumper I ran earlier this year had actual bolts with washers and nuts. Of course, if you hit anything with it, when it comes loose, it'd be catastrophic to the bumper.

 

I'd rather lose the splitter than destroy my bumper. I have put double sided tape and a bead of clear silicone three years ago and have had zero problems even at Road America at 155 mph+. This is with a cup splitter that has more surface area than a stock splitter and likely more force. By the way, use the newer style clips that use a phillips head screw as they seem to hold better than the original push pin style.