Results? Price?

 

On June 9th we had a group of 996s and 997 at a Dyno shop to run some test on the new design. The results were disappointing as they were all bad, nothing like what I experience with my car. The low RPM were lower then baseline and a little bit of gain after 5500 rpm. Not what I expected as I've done so much testing on every aspect of this mod. As it turned out, my negligent, I didn't check all the production pieces against the one I have in my car. The center veins that helps the low gain were too close together preventing proper air flow to the lower chambers. I design this insert using the center veins as my tuning point, the angle of the center vein determines the volume of each of the four chambers. As the Throttle opens, air is enter from the BOTTOM of the plenum then fill to the top when Throttle is at WOT.
We're planning a next group Dyno again with the modify pieces. I know a few of you are waiting for the production version, please be patient.
Note: rev3 was the one in my car tested with good result.
rev4 was the production pieces from the manufacture.

 

yep, that was it pretty much- But overall it was a good time. Good crew of folks showed up- Can't wait to have a go at it again, I'm sure you'll nail it this time Lee.
From your pics I can totally see where the machine shop messed up on the measurements.

Now as soon as I get off my lazy butt I'll post the pics I took....

 

You guys were great, I appreciate all your time on this project with me and though I was disappointed, am still not discourage yet. For those who missed the party afterward, the FOOD was awesome. Thanks to my beautiful and supportive better half. We'll do it again soon for sure, this time I'll check each and every one of those insert.

 

oh yeah- sure Lee- Just rub it in again that I had to bail on the bbq...


Also - Jackson Racing deserves some big props for accomodating all of us, really nice guys over there!

 

It's interesting - the pieces look almost identical, there is obviously some really fine tuning needed here. Still it wasn't a waste - if nothing else, you now know what happens when you go too far in one direction - it might even be worth getting a set of parts made for the next run with slightly different measurements and angles so you can fine tune on the fly...

 

Xdream, if the there was such a big difference, you need to get the manufacturer to use the Rev 3 to make a jig and then the production copies will be welded at the same angle reducing the likely hood of different angles...HTH
Shalil

 

Don't give up! My wallet awaits.

 

Man, the food was good Lee.. your wife can cook some mean "cha gio." I told my gf she may have to tag along next time. I have more pics of the meet, but am out of town this week so will post them later. The meet was great, but now I have another problem.. I want to get p0rsch3's head unit and v35's exhaust. This is really becoming a problem.

 

While disappointing results, it was still a blast to get my car dyno tested. I also found out that my car is stronger than some of the other 996s that showed up, even though mine is (was) completely stock and they had mods. 273 rwhp peak, 238 torque peak, whoo-hoo!

I wasn't able to make the BBQ after, sounds like I missed out!

The part is definitely doing SOMETHING, hopefully Lee can tweak it up to do what it is supposed to do. If he can get the results shown from 5600-6200 rpm across the entire spectrum, it will be a no-brainer. In that range, I showed a solid 10 rwhp gain, though I saw a similar 10 rwhp loss from 5000-5600 rpm. There is some question about the changing temperature and humidity, my runs were spread across 10:15 and 2:08, with temp change of 8 degrees and humidity change of 10%.

Anyway, I'm looking forward to the next run at this.

 

I would've been on the list to buy........got the RSS plenum instead.....on the group buy.

The inside of the RSS plenum is coated with a very slick orange paint. Maybe this helps reduce turbulence?

anyway, good luck!

plenum....foils.....it all art to me!

jorge

 

I applaud your efforts XDream! Anyone willing to develop an existing product for other to buy at lower than those existing products is a good guy in my book. I wonder if you can just increase the size of the center pyramid (higher peak with wider base) and delete the wings. Hmmm...this concept has been around forever. I remember buying something similar, a metallic piece for the plenum on my 1993 Camaro Z...good times

Funny how people call Porsche engineers idiots. Well try to design a high performance power plant that needs servicing every 15K miles and last 100K miles God willing more all mass produced. Besides the block sucks in air, not like it only gets pushed into the cylinders, so they can get away with the T-Shape. After market makes minor improvements and most don't do anything at all. The X-51 is proven so thats is what you are paying for.

 

Tom- Is that you?
Yeah your car was putting down some power. Mine was at 254 rwhp / 233 tq WITH the KN intake and Agency exhaust! Goes to show you that these particular intake / exhaust parts do nothing more than make nice noise. (was getting 253rwhp / 233tq before the Agency exhaust, we swapped the exhaust at Jackson Racing and ran it on the dyno again afterwards).

So who was it again that had the completely STOCK 996 C2 cab that was putting down 280+ rwhp?? What the hell? He doesn't even drive it hard... LOL

I think Lee is stuck somewhere in his garage re-calculating like a madman- i think he's on to something very good and I'm looking forward to the next revision and runs again on the dyno.

Kurt

 

LOL- I LOVE my new head unit... That was the best upgrade to the car so far. Kenwood DNX 7100