DeltaDevil88

Ive seen alot of motor pics on the 307 and it looks alot cleaner/better IMO with the air filter housing snorkel removed, Is it ok to remove it??? any ill effects???

Redog

Those all open air filters that you see look cool, but allow hot air from all over the engine bay to get sucked into the engine.

The snorkel, with the proper tubing, will act simialr to a cold or cool air intake like all the import cars have today.

I noticed a huge difference with an open air filter instead of a snorkel set-up on my 307. I'm looking into mocking up a custom dual snorkel set-up with some junkyard air cleaners. I have one air cleaner now, but next junkyard run, I'm picking up another

DeltaDevil88

Can you share the differences you noticed please?

I know w/o it that you would pull in warm air but didn't know how much performance would be effected

Redog

Talking 1/4 mile times and 2 barrels totally closed.

With the snorkle, I ran a best of 19.98 @ 65 MPH

With a K&N chrome lid, I ran a best of 20.20 @ 64 MPH

With an open air filter, best time was 20.40 @ 63.85, but I avg high 20.50's low 20.60's.

The tubing that was used was a dryer tube from Home Depot that came with the car.

The open air filter will ran great, with a ram air type hood

Lady72nRob71

I saw someone take big snorkles from other cars and weld them onto the 307's and run bigger ducting (3 - 4") to the areas behind the headlights or under the bumpers.
The only problem is finding space for the setup, as the 307 engine compartments are usually pretty crowded.
The snorkle flaps can be connected in parallel with the non-heat one blocked off with a plate. This may be beneficial for cold weather starts for guys up north.

joe_padavano

The rule of thumb is a 1 HP increase for every 7-10 degree decrease in inlet air temp. Going from 180 deg underhood air to 70 deg outside air should be good for 10-15 HP if the carb is jetted properly.

Redog

That's is pretty much whatI was looking to do. I'v e seen the high beam lights taken out and the tubing is ran thou there.

I like the under the bumper idea. Kinda like the "W" machines had back in the day, but yes the 307 engine bay is crowded with all that emissions crap

DeltaDevil88

I think for now ill keep the orig air filter assembley with temps going up in the DFW area and gas getting close to 4 a gallon I need all the MPG I can get.

Maybe in the fall/winter I will take it off and enjoy the look of my engine bay.

DeltaDevil88

Hey guys me again when I delete it this fall I noticed a tube that runs from the crankcase breather filter to the air filter housing what should I do with this piece???

Lady72nRob71

Since the little round crankcase filter is in the valve cover, you could remove the metal pipe and just turn the rubber elbow in the filter to point to the back of the car. If you frequently drive in dusty conditions, i would probably fab up another little air filter to add onto it.

After seeing the dust and sandy crap in my engine, I realized those crankcase filters do not trap much more than leaves and large bugs.
My car must have been used on a farm or something with all the red dirt everywhere.

joe_padavano

Simply replace the stock valve cover breather with one of the million of aftermarket push-in breathers that are available:

http://www.summitracing.com/search/P...ver-Breathers/



You catch the drift.

Lady72nRob71

Some of those aftermarket ones will filter the ingoing air much better than the stock type.

DeltaDevil88

Thank you for the help fellas...............Does anyways have a part # for the breather for my car??? I know they are universal but there are lots of different styles and types I want to make sure it fits before I order one.

Redog

I bought a K&N one when I swapped in my 350. I don't remember the part number.

Take the filter out and measure the base. These are ava in many different sizes, so use care to buy the correct size for your car

rustyroger

Warm air is good for smooth idle & part throttle running - the fuel mixes with air better, cold air is best for wot performance.
Most stock filters have a tube to the exhaust manifold fron the snorkel with a thermostatic control, its purpose is to have air at a given temperature going through the carb for consistent running, imortant with emmisions carbs, not required now as all modern cars run fuel injection.
Just about every European truck and most forced induction cars over here run intercoolers for the induction system, the makers didn't go to that expense without a good reason.

DeltaDevil88

Anybody have pics to show open air setup 307 bay pics??