IROC-Z_Racing

iTrader: (1)

I think the IROC hood is a good look for these cars, especially for me because the hood has louvers and my rear glass has louvers over it. What I was wondering, does anybody know how this can be done:

Make the louvers on the hood functional? I know you could just cut out the hood where they are, but the stock louvers are also solid on the bottom. I was thinking of this as another way to get hot air out of the engine bay.

but another problem that could occur would be water getting on the engine block. I'm not sure if this would be a problem since the louvers are not over the distributor.

Let me know how this could be done, if it is feasable, and safe on the engine with water getting on it.

- Justin

SheldonZ28

iTrader: (1)

I remember seeing a thread on this before.

Try

mike_c

iTrader: (13)

https://www.thirdgen.org/forums/fabr...hlight=louvers

Cool idea. If I had an IROC, I'd consider doing this.

IROC-Z_Racing

iTrader: (1)

thanks!

IROC-Z_Racing

iTrader: (1)

Now my next question is this. Is there somebody, a type of shop, that can take, for example, the Jongbloed cowl hood, and make cuts in the top to fit the IROC hood louvers in there and look just like the stock hood, meaning have the little raised edges on either side of the louvers, making the louvers look embedded into the hood? (like the picture below)

Not for functional use, but just for looks like the stock IROC hood was for. (after all the Jongbloed hood is functional)

I H8 WWD

iTrader: (5)

I'd figure any performance or body shop can do it, just ask around your area at the local speed shops and paint shops (respected ones) and see what they say...

ANYTHING IS POSSIBLE WITH ENOUGH $$$$

Go to GMPP and ask them to build you an engine, their not going to ask you what HP or what colors you want, but how much $$$ you got.

IROC-Z_Racing

iTrader: (1)

I hear ya WWD, haha. yeah like they say, "money talks"!!!

Orr89RocZ

iTrader: (20)

i've seen it done on a car at my track... i dont have the ***** to cut my hood up for that purpose since all it would do is help keep the motor cooler, since i'm still EFI, and the motor already is cool enough, never goes above 180 on most days.

For a carbed car on nice days, it would be beneficial i think...but then agian i'm not sure how effective it would be in sucking in fresh air at speed. I'd still run a duct to the air cleaner for fresh air.

IROC-Z_Racing

iTrader: (1)

well if nothing else, I will go towards the SS ram air hood and that will cram some fresh air into the open element air cleaner at high speeds! Plus the car will be unique, cuz not everybody has a 3rd gen with a 4th gen style hood.

DBLTKE

iTrader: (1)

Like so?

IROC-Z_Racing

iTrader: (1)

that's about what I'm looking at. How did you cut the slots for the louvers so that they sit "in" the hood rather than on top, like the stock hood?

DBLTKE

iTrader: (1)

It's not my car but he said that he cut the stock hood along the stock lines and raised it up and welded in a strip of metal on each side to effectively create the cowl. Of course there was some other bits a pieces that I don't remember but that's the basic idea.

Orr89RocZ

iTrader: (20)

i'm truely surprised no company has made a cowl Iroc hood. The daytona hood was close but i think is ugly with the shape and side louver holes it has.

InfernalVortex

iTrader: (4)

I know, it's bizarre why they added those stupid flares to the lines of the daytona hood. Im with you. That hood would be almost perfect if the lines were cleaner.

IROC-Z_Racing

iTrader: (1)

since DBLTKE brought up that somebody took the iroc hood and cutout the middle and raised it to a cowl, why not somebody get the daytona hood and modify it to the way you want it? Fill in the holes, or heck, just cut off the sides and mold in a new piece of fiberglass on the side. Course that car in DBLTKE's post was the stock iroc hood, which was steel, just weld the dang thing together. Can't do that with fiberglass.

neagan

iTrader: (7)

As a side note to this discussion; the practical side is that our injectors will last longer if there was a way to bleed off the extra heat. It's actually recommended that after a long hard drive to open the hood for a few minutes to let the extra heat bake off instead of allowing it to create varnish in the injector pintels. At the very least, I'll pull off the weatherstripping off the edge of the back of the hood & the windshield; maybe even add some washers to raise the hood up higher.... Nitro

IROC-Z_Racing

iTrader: (1)

I believe it was Skulte that showed me a trick (correct me if I'm wrong). He took the stock louvers and cut out the backs of each level to make them functional. This would create a double wammy for the iroc hood. A vortex would be created at each louver, thus working like a cowl hood and sucking in fresh air from the outside, then with the air moving accross the louvers, would pull out the hot air underneath the hood.

The only thing I worry about custom fucntional louvers is water. I heard of people using a rain guard, or something called to that effect, but I don't know where to get one, or if it needs to be fabbed up.

DBLTKE

iTrader: (1)

I've had functional louvers since last summer. I drive my car daily, rain or shine. We have no shortage of rain here in Oregon and I've yet to have a single problem.

neagan

iTrader: (7)

You'd just need to keep a spare set of uncut louvers handy or form yourself a rubber gasket; is what I'd most likely do .... Nitro

IROC-Z_Racing

iTrader: (1)

the only thing I found out from Skulte about turning the stock plastic louvers into functional ones, is that his actually started to sag, as in softening up (melting) because of the heat flowing through them now. Before, there was the hood insulation and steel protecting the louvers.

Does anybody know somebody who can take the stock louvers as templates and cut the exact same style louvers out of aluminum?

dayton's Z

i read, cant remember who said it, but there is a hood like the one being made above

http://www.hawksthirdgenparts.com/in...ROD&ProdID=124

its refered to as a turbo hood

i just searched yahoo for iroc turbo hood and chose the first decent link

IROC-Z_Racing

iTrader: (1)

the only thing about that turbo hood, something that a lot of people will agree upon, is the side portion of the hood. The extended sides, especially with the four cutout slots on the side. If it were not for the extended sides, the turbo hood, just might be the best aftermarket iroc style hood on the market. Don;t get me wrong, some people do like it, I just know a lot of people I've talked to about it, don't like it. It's just a matter of opinion.

I'd like to keep the stock flat iroc hood, I just want my bigger (and better) engine to breathe in cool fresh air, so I'm deeply researching on how to make the louvers functional, or some other alternative to get fresh, cool air in, and a way to get the stale, hot air out.

I H8 WWD

iTrader: (5)

Why hasnt anyone thought of what I am going to do to my turbo hood...

Okay, on the IROC Hood there is about 2-3"'s of flat panel in front of the louvers, so you cut these open, make a little down slope, FG it, paint it and now you have side vents along with RAM AIR.

Here is a picture of what I am talking about....

NOTE: THIS IS NOT MY HOOD!!! Just shows flat section in front of louvers

ryan91rs

iTrader: (1)

i see that working but it might look wierd. but keep thinking i might be wrong. and that hood needs the 91-92 blisters to fill that gap unless that is not your style.

askulte

On a regular, naturally aspirated engine, the stock louvers cut out should be no problem. It's the insanely hot underhood temps I get from the turbos directly underneat the louvers that softened them, and even that only happened during a 20 minute road racing session on track. It was fine on the street.

antman89iroc

I have been looking at doing this, not to allow hot, radiator air out, but to allow fresh air to pass over the dual filter inlet, MAF, TB and plenum. I would duct under and beside the intake/plenum to seal it from underhood air. Then the air in front of the radiator could be directed up and over the radiator, around the intake duct and plenum and out the vents. I have also been looking at thermal insulation materials to place between the radiator and intake duct. Basically, insulating the entire intake tract and flowing fresh, anbient air across it. This should help keep the intake a little cooler. I could possibly reconfigure it to allow the hot underhood air out the rear section of the "shroud" and still keep the "fresh" air flow for the intake.

I'm planning to fabricate a replacement louver out of aluminum or mild steel. Templates could be made from the plastic louvers and those used to make the replacement louvers. The new louvers would then be welded to a "frame" which is shaped like the factory inserts and bolted to the hood using the factory holes. Although I like the ease of just cutting the factory louvers if they don't melt, of course.

neagan

iTrader: (7)

Now That's more like it-
Do you have a roughed out mock-up drawing yet??

I'd like to see what you've come up with on this idea. Nitro-Nicky

antman89iroc

No plans available yet. Just in the concept stage. I've looked closely at my setup. It's pretty clean with the HSR and up out of the way of the thermostat etc. And the flat sides of the HSR make it fairly simple to create a shroud. I've just took a quick look at my car and I'm not sure how I would configure it to cool the intake and allow hot air out. I'll let you know as I have ideas.

Other ideas to let the heat out;
1) Add vents in the hood to allow hot air out. Possibly just above and to the rear of the valve covers.
2) Vents on the fenders (like the old T/A's)
3) Vents in the wheel house area, possibly down low or just inboard of the wheel/tire.

I'd prefer to allow the hot air out somewhere (like the above suggestions) and use the vented louvers above the engine for intake cooling.