Cheapest Mod with highest result.. 10 to 15 HP
See, this is the exact reason he didn't want pics of some old prototype (AHEM nine96) to be posted. That was a preliminary design, so judgements can't be made based on that because his newer refined designs look far different and unrecognizable from his original design and even from RSS's old design.
Good observations.. but I don't think he's re-inventing the wheel here because he stated that his goal is to produce a product that will retain the stock plenum, thus greatly reducing cost. I don't think this will evolve into a product that replaces the stock plenum, otherwise what's the point, RSS has already done it with much success. There will be no patent issue here, any more than there is a patent issue between Fabspeed and Tubi. They both make exhaust systems, but so what? Different designs. Yeah, you gotta wonder why Porsche didn't think of something so simple.. I think they simply didn't pay enough attention to this little part on such a complex machine. Period. Sometimes people give too much credit to Porsche because of the name. They are in business to make money like everyone else. If they scrutinized every little piece of the vehicle instead of getting it into our eager little hands as soon as possible, they'd never stay in business. Speed to market dictates that you must overlook some of the small things to keep your eye on the bigger picture.
Originally Posted by Eric523
This looks like the exact way that the RSS plenum came to life. I have seen the last two years or so of the RSS plenum developement, and can tell you that this is exactly what they stated out with.
In the early stages of production, they used the OEM t-plenum and simply inserted a splitter in there. We actually installed a few of these on customers cars with good results. As testing prgressed, he later went to the cast design with the coating.
The latest versions of the RSS plenum actuallty have different holes and grooves to split the airflow even better than the splitter did. Benchflow testing at its finest....
After the new design was made, all dealers were told to toss the old plastic plenums.
So you are working on old tech, that is patent pending. It may be a good do it yourself, but this product is already in production.
Congrats on your project
In the early stages of production, they used the OEM t-plenum and simply inserted a splitter in there. We actually installed a few of these on customers cars with good results. As testing prgressed, he later went to the cast design with the coating.
The latest versions of the RSS plenum actuallty have different holes and grooves to split the airflow even better than the splitter did. Benchflow testing at its finest....
After the new design was made, all dealers were told to toss the old plastic plenums.
So you are working on old tech, that is patent pending. It may be a good do it yourself, but this product is already in production.
Congrats on your project
Originally Posted by Eric523
The real question is....why did Porsche use the T-style??

Originally Posted by xdream
Thnx 996, my take on this whole project is that Porsche Engineers intended to leave this piece of the puzzle out of the equation so that we can have some fun with our cars figuring out the missing few ponies. To the naked eyes, one would not see this missing piece of puzzle until they actually open up their engine and search for it. Once you look at it, it will just hit you and you'll be thinking why didn't they do it.....just like I did. But then again as I said earlier they intended to leave it out for us to find it. If your perspective is like mine then you'll appreciate how powerful a LOGICAL MIND works.
Originally Posted by deputydog95
I wouldn't. He is still dealing with a 90 degree "T" whereas the RSS has a slight bend to it. I can't see this as being as efficient or making as much HP as the RSS unit. That 90 degree "T" is part of the problem with the stock unit and that is not overcome with an add on piece. That being said, it is a cheaper alternative for those that want to pick up some HP. Personally, I'd rather replace the whole unit. I find this similar to cutting open your stock mufflers to mod them for sound. Nothing wrong with doing it. I just wouldn't go that route. I do applaud his efforts for experimenting with this though.
Originally Posted by gravedgr
If I'd just paid $1k for something similar, I would probably have a derogatory opinion too. 

I'm just guessing, but probably at the end of the day when the R&D is done, his product will end up costing more than $200 and it won't make as much HP. I could be wrong, but why would RSS have gone to the great lengths that they did, when they could have just stuck a metal plate in there instead?
If he does end up with the same or better results for less money, well cudos to him then. He seems like he knows what he is doing and I wish him the best of luck. Personally I don't have a problem with spending 1 percent of the purchase price to pick up 25hp. That's not a bad deal... If he can do it for .25 percent, even better.
Last edited by deputydog95; May 19, 2007 at 10:11 PM.
Originally Posted by Eric523
This looks like the exact way that the RSS plenum came to life. I have seen the last two years or so of the RSS plenum developement, and can tell you that this is exactly what they stated out with.
In the early stages of production, they used the OEM t-plenum and simply inserted a splitter in there. We actually installed a few of these on customers cars with good results. As testing prgressed, he later went to the cast design with the coating.
The latest versions of the RSS plenum actuallty have different holes and grooves to split the airflow even better than the splitter did. Benchflow testing at its finest....
In the early stages of production, they used the OEM t-plenum and simply inserted a splitter in there. We actually installed a few of these on customers cars with good results. As testing prgressed, he later went to the cast design with the coating.
The latest versions of the RSS plenum actuallty have different holes and grooves to split the airflow even better than the splitter did. Benchflow testing at its finest....
Are you saying that (with holes and grooves) it's a cast version of the Tornado?
Last edited by Alexcwt; May 20, 2007 at 01:59 AM.
Originally Posted by Alexcwt
Just curious. Why cast aluminum? Doesn't it get heat soaked?
Are you saying that (with holes and grooves) it's a cast version of the Tornado?
Are you saying that (with holes and grooves) it's a cast version of the Tornado?
The "tornado" is an object disrupting airflow in a straight path.
The plenum is a piece smoothing airflow through a T.
The holes are for intake pulse shaping and were developed on the dyno as well as bench flow testing.
The plastic plenum will be cooler than the aluminum plenum regardless of whether you are driving or sitting still. Therefore, your intake temperatures are higher with the alumunim. Tests have proven this over and over again.
I've driven with my datalogger. I haven't see really much difference at all with my intake temps. They've pretty much remained the same give or take a few degrees. Maybe that piece isn't big enough to really make a noticeable difference vs some of the long intake tubes you see on the import cars.
Originally Posted by deputydog95
I've driven with my datalogger. I haven't see really much difference at all with my intake temps. They've pretty much remained the same give or take a few degrees. Maybe that piece isn't big enough to really make a noticeable difference vs some of the long intake tubes you see on the import cars.
Your datalogger does not read the temperature of the plenum or intake, It reads the temperture of the air at the MAF only. You don't think that you plenum air temperature is what it reads at the MAF with your blower running, do you?
Originally Posted by 1999Porsche911
Your datalogger does not read the temperature of the plenum or intake, It reads the temperture of the air at the MAF only. You don't think that you plenum air temperature is what it reads at the MAF with your blower running, do you? 

it would be interesting to see just how hot that plenum gets and how much trasferrence takes place.



