luckett

wrong! reread the thread.

CarbonRevo

Did you happen to look at the picture I posted? This is NOT a 968 style under hood filter. It's under the header panel, which is seperate from the engine bay. The closest hot thing is the radiator, if you can even consider that. My 4 holes face the inlet in the bumper. The stock box draws from the SAME spot that my new modded box will. The only difference is my holes face the FRONT of the car, and not the passenger side. It seems as if you have never cracked open an S2 header panel and seen the layout.

So please tell me, how are my holes going to suck in hot air, when the stock hole didn't? This is one myth, that has me stumped. 4 new holes, in the SAME spot as the " factory cold-air-sucking hole"...yet they are going to draw in hot air. Man...beats me. I probably need to take a step back from my car...

Relatively expensive? lol...no. Hard to find? Yes. If you consider $50 bucks expensive (with a new filter), then you're into the wrong type of cars...

Chris Prack

And you know this how? You know how the air travels under the hood of the car because? Do you have any data?

Do you think you could get more air (density) into the engine using the whole engine compartment or if you walled off 3/4's of it that, oh by the way, also eliminates the possibility of hot air entering the intake?

Here is the dyno chart I mentioned.

CarbonRevo

That's a stock 968 chart? What do S2's dyno at stock?

In my photos, you can see how I've modded mine if you're familiar with a stock box. I measured and cut the holes on the front which I believe are 1 3/4" holes.

The front half of the box, has a piece inside of it that I took out to allow the passenger side 2 holes to have direct flow to the filter. With the piece installed, the air would flow through the holes, then hit this piece and have to go around. It's more straight shot now.

In the pictures I handy dandy MSPainted, the blue arrows show stock airflow with a non modded box. The air flows through the front bumper opening, hits the front of the box, then has to be sucked in the end. The yellow arrows show the new air flow. The air flows through the front bumper, flows through the holes instead of bouncing off the box and is allowed to be sucked in.

Now gstein, tell me how I'm inducing hot air. My holes are more forward then the stock hole, and actually face fresh air. If you're talking about the 968 setup, I'm not familiar and cannot comment. However, it seems like your remarks were directed towards me. Please tell me how hot air is going to be pulled FORWARD from my motor into the front bumper/ header panel area, because I'm stumped...

luckett

I've tested it myself rather than relying on "internet facts".

I made no inferences about knowing the airflow characteristics under the hood. Irrelevent to temp gradients anyway. If you know the temp, that's sufficient info.

Not for you. I did the test to educate myself, not to be an internet hero.

PorscheDoc

I am guessing gstein maybe did not realize the S2 box is under the front nose panel versus in the engine bay like a 944NA or turbo.

Chris Prack

Tested it how? You are not answering the question. You seem to be very passionate about this subject.



It's not irrelevent due to the fact that the majority of the air under the hood is significatly higher than ambient.




Somehow I doubt air temp numbers on a 968 with an open air filter will make you a hero anywhere but in your own dreams. Relax. And you still did not answer the question. Typically it's "yes" or "no".

Chris Prack

Carbon, yes that is a stock dyno chart from a 94 968 that ran as a F stock PCA car. I have tried several different things with a couple of S2's years ago but did not come up with anything significant. Most of the gains I found in an S2 had to do with headers, exhaust and fuel pressure. The exhaust changes are free in PCA the fuel pressure is not. I played with the pressure just to satisfy my own curiosity.

CarbonRevo

What does a stock S2 dyno at though? About 180-185?

Chris Prack

Roughly yes. I just put my cylinder head back together yesturday and will put the head back on the car this week. After that it's going to the dyno for a baseline. It's completely stock with 120k miles.

CarbonRevo

So is 200whp a laugh, or is it an a achieveable number?

PorscheDoc

200whp is very attainable on an S2. I've got a few 210hp dyno's around somewhere on the old dyno computer. As Chris stated, headers are a pretty decent gain, though not cheap.

CarbonRevo

Is this with cams or not? I haven't even seen any cams for sale for an S2 really. It seems like re-grinds are the only option.

What other mods have you been seeing on these cars?

Chris Prack

I may have a source on new billet cams for an S2. I have been in contact with the guy that does my 996 varient cams.

CarbonRevo

Well if that's a good source, you can already consider me interested!