I started this along with a bunch of other projects when the car went into storage back in the fall. I've got most the mechanical aspects of the intake done. All that's left is the actual method of pulling air in and to seal up the area from the engine bay.

I used the top piece off a corksport intake I had, JB welded the nozzle for the air tube, and then just added a K&N filter with an HKS adapter.

The hood requires some cutting of the bracing in order for the filter to remain in it's current position without being bent by the hood.

After that there are two methods I'm toying with:

A cowl can be added to that side of the hood. I saw a thread where a guy had done something very similar and modified his hood by adding a cowl to it to pull air from the base of the windshield.

OR

Enlarge the hole in the engine bay by the filter into the fender and add some VW style slots as shown in the pic. I had a friend photoshop the vents in, I'd raise them up a bit more to get it closer to the filter.

I want to also take the stock snorkel and modify it to pull in some ambient air from the inner fender well area.

 

Interesting! With that setup I would definitely go with a cowl on the hood, it seems that a cowl would get you more fresh air than side vents would.

 

Here's a couple more Photoshop concepts a friend of mine did for me.

 

I dig the diagonal one, but just how much air is that going to pull in? I would think it would vent the air out more than take it in.

 

Well the side vent would be in conjunction with a snorkel into the inner fender well area which would bring in some ambient air or some heated air when the brakes produce heat.

I figure if you calculate the open area of the stock snorkel and create the same if not more area with the diagnal vent "strips", then ad a little lip to the "strips" to try and "scoop" a minimal amount in, it'd be some method of bringing in moving air from outside in addition to the snorkel in the inner fender well area...

I know these won't bring in tons more air then regularily, but I'm just playing with options here.

 

i was seeing where you were headed and thought fender long before i got to the fender vents thing but i was thinking of using a naca duct. much more baller and way more efficient.



here is what i did for my tid on my turbo fc

 

I had thought NACA duct for the hood, but then I wasn't sure I wanted rain and dirt to flow directly on to the fitler as the filter sits RIGHT under the hood. I also wasn't sure I'd have the clearance to run the filter under the hood with a NACA duct as the filter sits high.

But I hadn't thought about using a NACA duct on the top of the fender. It's somewhat flat and may just do the trick.

 

I second Stevensimons approach... Its much more practical.
The freshest most abondant souce of air will be closest to the front of your car. The vent in the side of the fender is more of an exhaust function.(and I dont mean engine exhaust) The best way in that case would be to scoop the air. Good luck though, keep updating,
-Dustin.

 

yeah it would work pretty well on the side. my car is usually garaged and only driven at a track and my naca inlets sit behind the filter where i have a few drain holes for just in case.

 

where my vent is is actually a very low pressure area so i doubt im getting much air forced in at speed. the side of the car is much more smooth and i think the duct behind the tire will be able to pull in a lot more air. not to mention the shortness of his intake will increase the torque of his na a bit.

 

Here's another concept for the NACA fender idea, again done by my friend.

 

looks wierd on the side. how about on the hood?

 

What about a z31 300zx turbo hoodscoop?

 

On the 4 pictures done by photoshop, I'd use the top right one. But I'd get the vents to line up even with the fender bend and the pinstriping. Like the ends of the 'vents' would be the same legnth from those.

 

A scoop is do-able as is the NACA duct on the hood. Here's what that would look like. Here's a shot of the hood clearance required as well.

I had a couple worries about a duct on the hood. One is the clearance. The shock tower is right before the filter, and a NACA duct scoops down into the engine bay. Because space is already tight, and I need to chop away some of the hood bracing, Im not sure a NACA duct up top would have enough room to work.

Another worry with a scoop or duct directly over top that area is rain water and dirt would flow directly into the filter. I'm not sure how much of an adverse effect this would have on the filter or flow, but I'm keeping it in consideration.

However, a scoop would easily solve the clearance issue of the filter as space would open up in the area the scoop was added.

 

where did you get that metal tube running off of the TB to the MAF?

 

It's the top section of the Corksport Intake. I had to slightly modify it for this idea by adding the nozzle which feeds the BAC I think... can't remember off the top of my head.

Another idea is some 2.5" dryer ducting will be fed down to the wheel well very close to the firewall(there's a rock guard i.e. some plastic in the wheel well in this area) and reverse slots may be added to the hood to create an "air drawing" effect, drawing air from the wheel well.

 

Very interesting, I saw that hole on the fender just last night and I was thinking about trying to do something with it for my intake. I like how you have the intake right there also Theory, makes me want to try it out, but couldn't you find a smaller filter maybe? Longer and skinnier? And again, I like that TB to MAF Connector. Where exactly did you get it? I would like to try out your setup on my car.

 

The TB to MAF connector is a section from the Corksport aluminum intake kit. I found a used one and it was lying around in my basement before I used that piece for this approach to an intake. I wouldn't recommend buying the intake kit for that single piece as it's a bit pricy for a new whole kit.

I could have purchased a different filter, it was poor planning on my part. I didn't measure as good as I should have, but with some slight hood modification it should work fine. I just don't want to buy another filter when this is brand new and I have a couple hoods in my posession so I won't miss one if I mess it up...

 

Well I dyno'd the car last night with this intake on. I thought some people might be interested. It's still the same setup: S4 NA, stock ports, S4 manifolds, short ram intake as pictured above, RB Headers-pre-silencer-Brullen Catback:

 

i bet that afm gets REALLY hot after driving it for a bit

(nick1986 has a good cold air write up.

 

Nice TQ curve Mark

 

280zx hood scoop


or 300zx hood scoop

 

Believe it or not, but that "corrugated" hosing running from your filter to the turbo is hurting power

 

I have wrapped my headers, and done as many cooling mods as I can do keep things reasonable. Haven't had any issues and the AFM hasn't felt that hot before. I will check tomorrow though to make sure.



I like that 280zx scoop. I'll have to do some searching around and give it a go.



"Nice TQ curve Mark "

Thanks Joe! I'm pretty stoked on the numbers!