Mounted the cooler in the front trunk now should I vent out the floor or to the side wheel wells?

Really depends on how many holes you want to cut.

My personal preference, from an airflow standpoint, would be to vent underneath the car. Assuming you have an adequate air dam in place, the low pressure area behind it would have more of a tendency to pull air thru the cooler than trying to vent out thru a spinning disc (which creates an air-flow dam of sorts in itself).

I would also shroud the back side of the cooler.

My bucks worth $1.00

theoretically the best place is probably the top or the hood...

But, barring that.. I would agree, out the bottom.
I think you will benefit from the vacuum under there, versus the rock slinging, wind turbine effect of the wheel well.

Rich

Thanks Guys after what ya said venting out the bottom Now I gotta figure out if I just drill some holes or cut out a section and reweld in a louvered piece ? Thanks again

Reweld in a louvered piece . . . it shoudl work, and I've never seen a non-hood vented louvered duct for an oil cooler or radiator.

I decided on wheel well outlets. It seems to work very well, I haven't even needed the supplimental fans and this is the only cooler for my engine, not just an additional cooler.

Click to view attachment

neiter ...

warning, MAJOR IMHO ahead:

- both are bad solutions. one adds lots of warm air under then car, which will create additional lift, the other adds a lot of drag as you're dumping a lot of warm air into the wheel wells.

personally, IMHO, *i* think the only correct way to vent a front oil cooler is upwards through the hood.
it'll give you a nice, unobstructed flow and will create additional downforce at higher speeds ...

[flame suit on]
Andy

not to mention a nice hot breeze in your face...

Now I have a question.

Is there an oil cooler that is one long tube, surrounded by aluminum fins, but overall nothing more than maybe 1-2 inches in total height?

It seems to me that if you run the feed up on long, inot a tube like device...and then run the return down the other long...
You might have the same surface area between all three runs???

Just curious, cause I would love a decent oil cooler, but not in the mood to cut up the bumper/valance to get it.
Like this
http://www.tex-fin.com/html/aircooled.htm#embedded
Rich

The more I looked at "finned tubing" and "finned tubed oil coolers" the more I know that this is possible.

Take a 1/2 inch tube horizontal finned tube (similar to the tube that is in the compact oil coolers) yet stretch the tube accross the entire width of the car.
You could add vertical finned tubes behind the rocker cover and use those to bring the oil forward and back to the engine.
Then add a grill to just the valance.
There could

yeah, right ....

i'm sure you would *never* drive one of those either then, because of all the hot air coming up the hood when you have the windows down ...
right?

Who would drive a Ford? Is it aircooled?



I'm not funny.

I wouldnt say never...

Rich

having grown up in germany without the feud over which amurican car company is better than the other, i can honestly say that the new Ford GT is one of the sexiest new cars out there ...

that's my very personal opinion, of course, but i would buy and drive one in a heartbeat, if i had the cash ...
Andy

I tend to agree with andy on venting out the top of the hood.
venting air under the car tends to go against some pretty basic performance ideas.
james

I agree (in concept) as well ......However, unless you are going to be full race, I think it really doesn't matter. For a street car, you could dump it anywhere without too much concern.

out the bottom

Bad a_ _ car.

As far as the cooler what is the car used for? If its a street car with 3-4 AX per year. Try hiding the wholes like my pic. I have a 3.2 in a real six I wonted and area that would be very easy on the car and easy on the eye. I drive very hard and up hills whenever the car goes out. I have never seen temps over 205. Just MHO and I live in a hot climate.

here are the holes that it breaths thru....incoming air, comes thru the front bulk head where the rubber grommets are removed.

out the bottom
15 1.5" holes

Very nice. Where are you getting the air from? You have a 4 right?

Check post #18 in this thread. Two up from your post.

Dan,
I will be going your route except I have the AC hole to work with. Do you routte your lines through the tunnel or in the cabin?

Oil lines go under gas tank, up over bulkhead, down thru heater hose that went to defroster, down into long and thru the heater tube inside the passenger side long, out into area by the oil filter.
works very well, no extra holes to drill in tub, other than bottom of trunk.
No excess heat in passenger compartment from hot oil lines.
I even ran the oil lines thru the existing flex hose that was for the original heater, that way they don't rub on any metal and it keeps the heat in the lines.

Here are links to how I did it through the hood...

Some people like it, for those who dont... well too bad

http://www.valhallaracinginc.com/914_pics/oil_cooler.jpg

http://www.valhallaracinginc.com/914_pics/laborday06_4.jpg

as far as out the top or bottom....I tend to believe that the factory did some engineering for the GTs oil cooler and it vented out the bottom.

If it was good enough for the factory 914-6GT hotrods then it is good enough for me.

Heck they didn't even use front spoilers or rear spoilers.... works for me.

problem with that is, you ignore the circumstances at the time ...

the 914 wasn't rolled out until late '69. they we're trying to get a few of them race-ready for the '70 monte carlo.
they were under a lot of (time) pressure to get those cars ready.

i don't think that they had a lot of "engineering" going into any of those add-ons. as you mentioned yourself, they didn't even run spoilers!

they did what they had to do to make it work in a very short period of time, not what was the best possible solution from an engineering point of view.

heck, most of the early GT's didn't even have swaybars!!!

i think your argument is flawed. porsche had no time to put a lot of "engineering" effort into the factory GTs, yet a lot of people today take their modifications as "the gospel" ...

show me any modern race-car, including porsches, that dump their cooling air under the car, run no spoilers and no sway bars ...

Andy

proof and pudding and all that ...


you may want to copy that suspension setup below, it must be superior, after all, that's how the factory ran that GT ...

Andy,

Didnt your car have that suspension setup?
I seem to remember a pic of your red car in a very similar pose....

Rich

all of the water cooled 986s, 996s 997s and 987s seem to vent the hot air from the radiators under the car/wheel wells.?

yes, it did. just like any other stock 914. NO swaybars ...

then i started throwing money at the suspension ...

point here is, if porsche had put a lot of "engineering" effort into the GTs, you really think that car in the pic above would have looked the way it does?
Andy

are they race-cars? what does that have to do with how the GT's ran their oil-cooling?
Andy

just teasing...I always remember that pic...
Please post it again...it was awesome..

Rich

here you go. NO rear bar and front bar disconnected ...

just like the real early GT's !!!
Andy

you said they didn't have enough engineering time to do the 914 properly...
I think they had lots of time to engineer the water cooled cars...and yes the race cars vent the radiators in the same fashion....under car/wheel wells.

where did the factory 911 race cars vent their oil coolers? under the car?

not going get into it with you Andy....it is not worth it.

I believe that my car works very well the way it is set up and I have had no cooling problems with the car in it's current configuration.

I might even run cantilevers on 8 inch rims

no one argues that it works. i never ever said it didn't work.

i have two points, however:

- dumping additional air under the car creates additional lift at higher speeds, no matter how you look at it, it can't be good ...

- just because the factory did this and that to the GT cars they raced doesn't mean it was the best possible solution. all it means is that it was good enough at the time to get the job done.
just ask your 914 god buddy what he thinks about the effectiveness of the factory GT stiffening kit.
wanna bet as to what answer you will get?

and don't get me started on the racing tires. you guys *completely* missed my point during that "discussion".
i'm over it. i know who to stay away from on the track ...

Andy

Yeah those GTs were really just cobbled together. Truely. BIG Fuching tires. NO areodynamics. Brutal Go-Karts pretty much.

It seems so logical to revise the (barely functional) "behr" airbox to exhaust right there in front of the windshield. The areodynamics would practically draw air out b/c that is a total low pressure area.

edit- Porsche wasn't attune to airflow until the 70s. Look at the early 917s even- they sit up a foot off the ground!

I thought BillP answered your concerns with his replies directly from Goodyear.

You won't have to worry about track stuff Andy...

I doubt you and I will ever be at the same event, and surely not in the same run group.

Bye Bye

yes, bill did.
however, there were a lot of opinions voiced prior to bill actually calling goodyear that clearly showed a mindset of some that is borderline dangerous ...

i was not refering to bill, i was refering to some of the people that got into the argument prior to the point when we got the information from goodyear.

like i said, you never *got* my argument in the first place ... i can spell it out for you in one simple sentence, if you wish. it is still as valid as it was back then ...
Andy

paul...

i still havent fabbed my shroud yet either

what say you teach me some fine arts lessons of sheet metal? LOL

I think i'll eventually do mine out the front hood, llouvered or something. it would look neat, no?

The only thing I have to add about venting up or down is that pretty much -every- car that vents -up- is a dedicated, purpose built race car. For cars like the 914, 968, 996 etc, they are production cars first and foremost. The 917? Not a production car. 962? Not a production car. The GT40? Not a production car. And the new Ford GT is modeled after the GT40, so it retained the same external features.

Thorough engineering demands upwards venting from the hood??? Then I guess the team that designed the Carrera GT were just a bunch of know-nothing hacks?

Just pokin' fun at you Ahndy... But it -is- possible to design a car to vent down and not sacrifice performance.

Yes, the new Ferrari super-cars are upwards venting. Makes sense, it is capable of speeds that our 914's couldn't even achive in guided free-fall, and are not very liklely to see daily driver duty, hard to really call them -production- cars. Can the F50 even be considered for homologation? Were there enough of them built (<400)? I know there was a very limited number of Enzo's (400?). Hardly what I'd call -production-.

Okay, devil's advocate... The Lotus Elise is upwards venting, and it is about as close to a hopped up 914 as any modern production car will ever get. Still, I don't think it's essential to cut the hood, and I don't think you're hurting the performance of the 914 much by venting into the wheel wells or below.

I prefer the wheel wells... The air in there is generally pretty stagnant, so exchanging the brake-heated air in there has got to be a good thing. Even air that has gone through the oil cooler will still help reduce air temps in there by creating more tubulence in there and getting air to circulate. Add some good front mounted brake ducts and it's even better...

There, that's my $0.02...

-Josh2

Good point, Josh. I like that thinking...


If we all yell loud enough this will magically be decided once and for all.

Wow, bro, I hadn't seen your car in a while It's going together.

Thanks, that pic was Labor Day 2006, you should see it now. I used to have better pics of the vent area can't find them, maybe will take more this weekend.

"Almost there. Almost there.. Almost there...." - Star Wars IV Luke Skywalker. (or any lame ass porno video)

My pick up is a Ford, my mustang Cobra is a Ford (535 hp)

If you read "We at Porsche" you will learn that Dr. Porsche (Ferry) and Henry Ford were friends...

Click to view attachmenthere.

just be aware that as of my last reading of the SOLO-II (SCCA Autocross) rules a couple of years ago, cutting holes in the bodywork is not permitted in any stock or even Prepared class. Welcome to 'Modified."

When you consider the fact that the car is sporting a 1986 3.2 Carrera engine I would expect nothing less... unless you think anyone is dumb enough to believe that is a 2.0 six...

I didn't build it for you...