Air inlet ideas?

[Barbapapa]

Please help me find a way of getting filters air to the pair of 3" nubs on front of my new airbox.
Has anyone come up with a way of getting a filter in front of the radiator with some kind of oval channel over the top of the radiator?
Kuhn?
DR?

[Danglerb]

Best source of cold air is right in front of the windshield, but herr Kuhn has some over the radiator snorkels.

[Barbapapa]

Originally Posted by Danglerb

Best source of cold air is right in front of the windshield, but herr Kuhn has some over the radiator snorkels.

I've contemplated that but have decided against it based on the unknown of how well it would work. That style hasn't been used much in recent times and is considered to be less than promised from what I've heard. Do you have any 928 examples?

The car is a racer that sees some speed and a front inlet is known to provide some positive pressure at speed.

Off to find Kuhn....

[Danglerb]

I think Kibort did some tests with a sensitive pressure meter and long testing tube that was placed at various location on the car. Base of windshield plus pressure, nose nothing special.

All from memory, so grain of salt etc.

A couple of the local track cars have cut firewalls for air to the filter. I haven't decided whether to try it yet or not.

[Barbapapa]

If you're going to do some mods, it would be worthwhile to ditch that stock filter and go with a round one.
Just one typical 6" base tapered filter has the same area as the whole 928 flat filter.

[DR928]

Mike,

That looks really cool! Post more pics, PLEASE!!

Right off the bat I would say John's over the radiator snouts would work pretty good with that setup. Mike Frye just did an excellant setup on his using those (see pic below) that looks like it could work with your setup.

Also do a search for the Corvette "Batwing" style filter systems. Some of those might be a direct or close to direct fit with your setup.

[Barbapapa]

That's very helpful. Thank you!
Here's another pic. It looks much better without the big, honkin' airbox.

[Barbapapa]

Here's more airbox. I've angled the snouts downward to follow the hoodline. The current plan is filters in between them and the radiator but that's getting tight.

[Normy]

If you want a cold air intake, then the best place is right above the stock air filter. This ruins the lines of the car, but the best intake with a stock intake system would be at the base of the windshield.

One of the car's best lines are the un-interupted curve of the front fenders and hood from windshield to nose. We, those that own them...call them "Sharks" because of this.

A cold air intake system built into the cowl disturbs this great design feature. Porsche played around with slots around the edges of the front fenders (wings) to feed two air filters....but they discovered what I have known for years- it won't make much difference.

Corky Bell, a mechanic and car racer, wrote several books about automobiles, and in one of them he talks about the magic number: 1075.

1075 degrees is real hot, about 300 more than your oven makes during self-cleaning.

-Corky says that if the charge reaches less than 1075 degrees when the piston creates the maximum pressure in the cylinder....then gasoline turns into dynamite and you can kiss your pistons good bye. Heavy detonation with large boost can lead to pistons holed in 5 seconds!

Most "boostards" don't know this. They know the other fact: supercharging will wear your rings out much quicker!

The people with "boost" on here? ALL have had belt problems with their superchargers. They can't make the belt work right, and the high-boost people in Wisconsin won't talk about their detonation problems.

Why?

Also... none of the supercharger people have commented about the wear on their rings.

Then again, those guys have a lot more money than I do. They can pay to rebuild an engine each evening. Me? I can barely afford my 928.

N!

[DR928]

Originally Posted by Barbapapa

Here's more airbox. I've angled the snouts downward to follow the hoodline. The current plan is filters in between them and the radiator but that's getting tight

Mike,
Looking GREAT, you have come a long way!

I am also glad to see the thickness of the top plate on the box, I was worried for you until I saw that :-)

[rhjames]

looks like you go in either direction--front or rear intake.

going to the front would keep the body work from being butchered, however the front of windshield would yield high pressure. Routing hoses to the very front of the car (radiator/grill opening) may give you even higher pressures....?

there's room for both.

--Russ

[Alan in AZ]

For a pure racer another option is to take the intake through the fender walls and from the area under the headlamp each side. You will need to do some equipment adjustments but its very viable to route this way - there are even examples of A/A intercoolers mounted here (see Carl's racer). For a pure intake you can leave the splash shield/liner in place and open up the front venting to increase airflow. This does have the advantage of less complexity w.r.t. mounting for a snorkel style and seperates the cooling airflow from the intake - it may help keeping the charge cooler at low speeds too.

Alan