I ordered a FMIC for my TurboII S4 and I was wondering if anyone has tried to utilize the factory hood scoop for a CAI after the TMIC is gone????

Probably a dumb question, but I couldn't find anything about it when I ran a search.

Thanks!
BBZ

 

no. the scoop doesnt really bring in any air

 

Well damn.

 

HAHAHAHAHAHAHA

 

hahaha! Hey man! First time I've seen you outside the lounge!

 

okay, serious time.

What if I crammed a wide/thin vacumm attatchment under the scoop and connected it with PVC pipe. Do you think it would catch enough air to make a difference????

The only problem is, in order to actaully wedge that attatchment into the scoop and mount it there, I'd have to design the pipe seperate so that the hood can open and close. Make sense?

Someone tell me if I'm way off on this, but I think it could work.

 

why wouldnt it wouldnt make a great CAI if the intake was sealed to the scoop. the scoop is designed to flow large amounts of air over the stock top mount intercooler, so i dont see why it couldnt function well as a CAI too.

 

Then what does it do? The point of it, as I understand it, is to ramp air in over the intercooler.

If that's gone, you should be able to route piping up to the intake box, and have a ram-air scoop.

-=Russ=-

 

Damn, I don't have any vac attatchments....time to go steal my Mom's.

Updates to come.

 

It does flow air, but unforunatley, the scoop is in a low-pressure zone along the hood. The scoop would've been more effective if it were placed closer to the nose of the car, but I think the styling dept may have had something against that (looked ugly). Subsequently, it's pretty inefficent at getting air in.

Building a CAI up there would be a very difficult task, since the CAI would suffer from the biggest shortcoming of a TMIC anyways - radiant heat rising. It would make the CAI terribly inefficent.

That and it would be very hard to get something to fit up there...

David

 

Bummer, didn't even think about that. There's really no great place to put one. HKS makes a CAI, but it's only for the S5.

I'll scratch my head and see if I can come up with something else.

Thanks David,
BBZ

 

Aw geez, not this **** again. Yes, it's in a low pressure zone. What makes a low pressure zone? Air moving rapidly across a surface. The scoop is positioned to grab the boundary layer and suck in into the engine compartment.

At speed, it does work. How do I know? Because I am constantly picking mashed bugs out of my intercooler.

 

I think this mod would be usless.

 

I never said that it did not work. Hardly, I know it works. How effiecently does it work though?

Camaros and Trans-AM WS6 owners can even verify this -- the Trans AM WS6s have their hood-scoop near the front of the car while Camaro SS owners have it positioned farther back, much like ours.

It is reported that of the 2 breeds, the WS6s are generally *slightly* quicker then SSs. Not much, but the difference is there.

It's a moot point, either way. There are too many disadvantages over advantages of using it as a cold-air induction point. If you really want cold air, someone should build a small hood scoop right behind the right headlight. You'll really see a difference on slightly modified TIIs.

David

 

Even whith the TMIC gone wouldnt it still pull in a bit of air to help keep the upper intake manifold a bit cooler.

 

MAAAAAAN, i love this pic

 

That is a cool pic! where did you find it?

The real question is: Is it accurate? It looks to be pretty much like I imagined the air flow, but I don't know JACK about fluid dynamics..


I like how it even has the little missing/bent pieces in the bottom metal rail (the jack rail), just like mine!

 

well, i was searching for things like this, so i found it in about 2-3 different threads...

also, i still don't see why people use those headlight 'slits' for their CAI... based on this drawing, it seems like a waste.

 

People seem to forget that just because the arrows arent pointing towards the car doesnt make it a "low pressure zone" its just not seeing as much pressure as the front of the car. If you think your hoodscoop makes no difference put an n/a hood on your car and let me know how it works out for you. Im not arguing that this would be a useful mod but by no means would it be a complete waste of time.

 

I'm working on making an air box with a scoop to go down and sit slightly below the bottom of the front lip.. I think that would be rather effective...

 

true. but i never made any reference about it being a low pressure area. why i seem to think it's a waste is because i think there are other ways of going about it, rather than cutting a hole in your headlight cover. obviously, it looks like it's one of the LEAST pressurized areas.

this is sort of getting off topic though. about the hood vent, that's why blackbirdzach went with an FMIC in the first place.... because of HEAT SOAK. so, why not go somewhere else with it?

 

I tested the scoop with an airflow meter up to 70mph indicated ground speed, and the scoop worked just fine. It did show a slight energy loss vs. ambient air at the same vehicle speed, but that is to be expected.

It was scanned from an old issue of Rotary Rocket Magazine that was dedicated to the new (at the time) 86 RX-7.

It's your garden variety vehicle manufacturer propaganda diagarm. It's probably fairly accurate, but the airspeed of that flow diagram is not listed. Just to take a swag, I would estimate the airspeed at 55mph, although I could be wrong. The airflow characteristics would change at lower and higher speeds.

 

That "aerodynamic flow profile" is originally from a sales brochure, which means from an engineering point of view it's meaningless crap. Plus it's for a NA, not a Turbo, so it's irrelevant in this discussion.

 

That diagram tells me a lot about the car, and with my base knowledge of scoops and spoilers, I know that the general areas of pressure will not change by a significant amount on a TII. If that diagram is simply meaningless crap to you, then I have a better engineering background than you.

 

Sure it will work, but the internal piping will take some very clever creativity.