gnosis

I'm looking for a source for the 968 Turbo S front bumper. It has a larger hole in the front to increase airflow to the intercooler. Are these available from Porsche? How about an aftermarket supplier? I assume there are some other bits behind it to funnel air to the intercooler. Any info on those bits would help me out too. Thanks.

CBass

Are you sure there is a larger opening? I was under the impression the only difference was a bolt on splitter.

<a href="http://www.gt-racing.com" target="_blank">www.gt-racing.com</a> offers the splitter, and an air dam, but I can't tell you if it has larger opening.

Mike O

Here is a picture from 968.net


The intercooler air inlet is definitely bigger than the one on my NA coupe

AD

Would it be possible to simply cut a larger hole into the bumper of a regular 968, or is the 968 turbo bumper molded differently. Thus making a regular 968 with a bigger hole "look funny". Also would it be difficult or unwise to remove the material on a regular 968 bumper. I really like the turbo look much better.

Tom Pultz

[quote]Originally posted by Mike O:
<strong>The intercooler air inlet is definitely bigger than the one on my NA coupe</strong><hr></blockquote>That's also a Turbo RS, not a regular S.

gnosis

The Turbo S and the Turbo RS both had intercoolers, and they both had the larger intake hole to feed more air. See this real Turbo S photo:

<a href="http://vista.pca.org//stl/968turbo.jpg" target="_blank">http://vista.pca.org//stl/968turbo.jpg</a>

It's not possible to cut around the smaller hole to make it larger, as the plastic material doesn't take kindly to cutting.

Seems nobody is selling this part, but they have all the other bits. Strange.

Tom Pultz

[quote]Originally posted by gnosis:
<strong>Seems nobody is selling this part, but they have all the other bits. Strange.</strong><hr></blockquote>If you know of anyone that's selling a genuine Turbo S hood let me know. I have a friend that's looking for one for his Turbo S replica.

Julian Allen

I believe Max Crawford at Crawford Composites can make a replica of the Turbo S hood (NACA duct openings but not the vent for the intercooler). His work is outstanding in quality.

gnosis

Does anyone know if the left NACA duct feeds the original Turbo S airbox (which I assume is a 944 Turbo part) directly?

See here for original Turbo S airbox:

<a href="http://vista.pca.org//stl/968tengi.jpg" target="_blank">http://vista.pca.org//stl/968tengi.jpg</a>

Note shape of inlet hole.

Sure the NACA duct will blow air in it's general direction, but is it, by design, plumbed under the hood to capture 100% of the airflow directly into the airbox. I've been looking for hood underside photos for confirmation but I haven't seen any.

It would seem like a good idea to me to seal this area off and guarantee 100% cool charge to the airbox (assuming the duct can flow enough air). Unless there is another reason for the existence of the NACA duct - does anyone know the real reason Porsche added them?

Thom

<img src="graemlins/crying.gif" border="0" alt="[crying]" /> <img src="graemlins/crying.gif" border="0" alt="[crying]" /> <img src="graemlins/crying.gif" border="0" alt="[crying]" /> <img src="graemlins/crying.gif" border="0" alt="[crying]" /> Why the hell didn't they build more Turbo S? <img src="graemlins/crying.gif" border="0" alt="[crying]" /> <img src="graemlins/crying.gif" border="0" alt="[crying]" /> <img src="graemlins/crying.gif" border="0" alt="[crying]" /> <img src="graemlins/crying.gif" border="0" alt="[crying]" />
(desperate, silly post)

Tom Pultz

[quote]Originally posted by thom:
<strong>Why the hell didn't they build more Turbo S?</strong><hr></blockquote>Because Porsche did not want a 4 cylinder car beating up on its flagship 911.

gnosis

I've just found some pics of standard 951s, and they have a plastic duct connecting the standard airbox which winds its way down into the front left area, beside/behind the intercooler. Can a 951-savvy person tell me where this duct goes? I want to know exactly where the air is coming from to feed this standard turbo airbox (without door-knocking in my neighbourhood until I find someone who owns a 951!).

Thanks.

slevy951

That duct goes into the fender. Pulls cool air for the motor from there.

Doug

My thought is Porsche would not do it any other way. The air inlet on top of the S engine must seal to the outside. Why run an intercooler if you are going to pull hot air from above the engine. c-mon use your noggin. Its likely that both openings in the hood combine to seal over the air inlet for the engine. As there is nothing on the engine below the passenger side opening. Additionally the openings in the hood are not very big it might need them both. A underhood photo will prove it once and for all.

gnosis

Yes, slevy951, I've seen some more pics of 951s now and I have found what you say. I guess those hood ducts are just to keep excess engine bay temperature down, especially on the turbo side.

Actually, Doug, the only time is it acceptable to breathe heated under-bonnet air into the intake is when you DO have an intercooler. Do the math and you'll find the extra 40 degrees or so of heat is reduced by the efficiency of the intercooler to a minimal amount. It's not ideal, but it is doable if there is no alternative. It's the losers without intercoolers who have "cold air induction" fitted under the bonnet that are wasting their time.

But clearly Porsche haven't done this. Clearly the original 951 airbox feeds from an area away from the engine bay. And clearly those NACA ducts are for engine bay cooling, not intake air.

So I don't know who of us on this thread isn't using our noggins. Nobody suggested that heated under-hood air is or should be used.