Im in the process of fabricating a cold air setup on my 90' IROC. I already have a K&N Pod from another car, but really wanted to see the setups that other people where running.

Thank heaps guys. I have ALOT of repect for the members of this forum and their ability to help eachother out in this sort of stuff.

 

Well, I don't want to come off the wrong way but unless you have more than a 400 hp engine in that IROC sell the k&n intake and modify your stock one. Take the baffles out that bolt on to the housing under your air filters (eight screws total I believe). If you want to go a step further you can cut the bottoms off where you took the baffles off from. To do this you will need to take the whole lower section of the air filter housing off of the radiater support and cut at the top of the little holes where the housing took air in initially all the way around.

 

Yeah, depending on what type of motor you are running, there is nothing all that bad about modifying your stock intake system. Besides, most guys on here that i have seen do not even have real cold air intakes! Where the filter sits, it still draws in warm air. It really should be under the car. Like drilling a hole in the battery tray and putting a filter under there. Some guys have some nice intakes though. good luck

 

Yep, just gut the airbox and if you want, run some pvc pipe from the fog light holes in the grill up to the filters. I did that for a while until I saw it made no difference at the track.

 

Hey guys, thanks for the input. A few things i wanna clear up.

1. The cars stock intake is completly gone. I purchased the car with an old K&N pod directly on the plemum (dont as).

2. Also, the car is currently sitting at about 320+HP but now runs a 100HP shot of NOS and is running out of breath at high RPMS. I wanted to to construct a CAI pod assembly cut through to under that car like you mentioned to feed the intake better.

I just really wanted to see a few examples before i got started incase there was a wicked way of doing it that i missed.

Thanks again guys

 

Well, that changes things quite a bit then doesn't it?

This is John Millican's setup, hope he doesn't mind me posting this link.

http://www.lt1intake.com/airintake.htm

 

Holy CR@P! Thats a little more extreme than i was expecting... TOTALLY wicked. I would have thought running the ducting across the back of the radiator would heat them too much.

What should i use for the straight sections of duction? Heavy duty 3' hosing? tin/aluminum pipes?

 

Looks like some sort of heavy duty dryer or vacuum hose. Email Millican, he'd probably help you out.

 

I have the Lay Industries Ram air Setup.
I found that my blower will put out one psi more at 70mph at WOT with this setup.

 

This K & N running off the front of the throttle body seems to povide great air flow.

 

Yes and lots of hot air too. I would get rid of that setup.

 

True, Outstanding winter time air flow. I probley will remove it for a different deal in the summer... Beats the straws right now though. It seems to be as close to running no air cleaner as I have felt for now. Max RPM is obtained at a greater rate. Since underhood air flow is not a great feature of these car. Out side air drawn in like ram air is gotta be the best choice. There is no doubt that cooling the mixture will condinse it for greater flow. Ram air with an Iced intake will get better performance. Thermal expansion can effect everything right down to the heat transfer from the exhaust valves..

 

anybody know what was used for the y comin off the the TB and where i can get one fast!!

 

Well - I think if one took off the weather stripping on the back of the hood to allow under hood temps to drop a bit, then the filter bolted directly to the throttle body wouldn't draw in such hot air.

You might look into that as well.

 

http://www.celligent.com/tim/iroc/airbox/ramair1.jpg
http://www.celligent.com/tim/iroc/airbox/ramair2.jpg

Tim

 

LBSZ28BLOWN:
Where would I be able to find out more about this Lay Industries Ram air?? I tried searching on the internet,but found nothing...

 

Here is mine ...... cost me about $7.00

I have to seal off th eupper parts ( shown in pic ) but I don't suspect that it will help me much ( not sure though )

I hope you can seee it ...... the file size they allow is pretty small

 

Wow ...that is way toooooooo small ...if you want to see it email me and I'll send you a pic

 

How did you attach a file that size !!!!!!!! I wante dto show mine off toooo wahhhhhhh!!!!!!!!!!

 

Turn it into a jpg...bmp's are too big to post unless they're like an inch by an inch...
if you can't change it,email the pic to me in the bigger format,and i'll change it for you..
loozah@videotron.ca

 

Thats a really nice looking setup, but why did you remove the foglights?? Do they have to be removed to fit the ramair in there?? I've been holding back on doing this mod to my car,because i dont want it to look like a cheap hackjob,but if I can buy that system its worth it...
Its called the Random Technology RamMax right?? Why is it so mysterious and hard to find anywhere!! Even Random Technology doesnt advertise it on their site...

 

Heres D's89IROCZs' pic:

 

Thanx iroc4ever !!!!!!!

this is a duct setup you can buy from Home Dept ..... or whatever you guys have around . It is furnace ducting . This one has a 6" round opening ( seen ) , and the bottom of it is a 3" x ???? " rectangular opening... It fits right in there nicely . and the bottom ( which points out the front..... behind the foglights ) fits over the pastic inlet that originally exsists ( the foglight is mounted on this ) so you get to use all that area ...not a 3" section of it. Also another plus is that is is galvinized ( no rust) and maybe it will help cool the air ( I am reaching a little ) . Oh ya it was real cheap


this was something my old man came up with when we were leaning over the motor with a beer in our hands

 

No you don't have to remove the fog lights. I just didn't want them anymore.

Tim

 

Tim, is that the Ramdom Tech cai? Didn't they stop making them, or did you make that? Simple, yet effective! No $200+ like SLP's. Thats just too much IMO. Later

 

yea. tim that is a nice cai ram air... looks like a project for me on next break...

 

LBSZ28BLOWN:
Where would I be able to find out more about this Lay Industries Ram air?? I tried searching on the internet,but found nothing...

iroc4ever
I'll lookup what I can find tonight on the Lay Industries ram air setup I think it cost $129.00 when i bought it

 

Yes, it is the Random Technology Ram-Air setup. I think it cost like $80 when I bought it about 5 years ago. At the time that price seemed way too high to me. I remember complaining about what I got for that $80. However, now that the $80 is five years in the past ... lol ... I am happy that I have it. I put this on my car when it was stock and picked up a solid 0.1 and 1mph. The fit of the plastic boxes to the underneath of the stock airbox is awesome.

Tim

 

go here for some pics"
www.fbody.com/members/brads91z28

 

Thanks for getting back to me Tim. I'll try Random Technology again but i think it is discontinued. I talked to 85MikeTPI about it, i believe thats his name b/c he has one similar, and i believe it is discontinued. But i'll look around anyway! Looks pretty straight foward and as effective as anything else made the same way. Later-Bryan

 

I just called them and Random Tech no longer sells that kit. Damit! lol Hey Tim, when you meet your goals n/a and pick up a blower of some sort, i'll be more than happy to take yours off your hands. j/k Later

 

Firebird setup.

 

Hey Steve10, What tubing did you use? That looks good. Also, i am guessing that's the MAF in the middle!? Did you cut a hole out to stick the filter in there or is the picture deceiving, is it just sitting there? Thanks for any info you can give. Later

 

It's 3" 316 stainless steel w/3" 316 weld 90's. Yep, that's the old MAF, until I can do the 730 swap. The 9" conical extends through and under the car at an angle toward the front of the car to scoop the air. The whole thing whirrs like a blower at slow parking lot speed. If you need, I can take some pics of that.

 

Well then I have a question. On that setup you have going on the front of the throttle body, where do you have your MAF sensor? How could that work? I am not expert but you need the MAF in the TPI car right?

As far as it being to hot I wouldn't agree. I looked at my Trans-AMs hood. There are holes behind those nostril style grilles on that part of the hood right above and sort of infront of that filter. Now I know the scoop isn't meant to be functional but I have seem them made to be. Also there are holes that go all the way through there. I wish I had a digital camera to illustrate. I think that it would get better flow even in there then it would in it's normal place.

Please as always I am not an expert in this field. Correct me if I am wrong. I am just looking at what I saw on my car.

 

the 90-92 TPI's are speed density, and have no MAF sensor. you can't do the cone filter directly on the throttle body in a MAF car

well, in stock form, it'd still be hot, but if you cut out the obstructions in the bottom of the hood behind the vents, that would probably bring in some cooler air, and lower the temp in the engine compartment a little, and most of the cooler air would be easily available for that intake setup. however, aerodynamically, those vents are not nearly the same as a ram air scoop, so the effect probably wouldn't be too great, as most of the air flows over them rather than into them. (however, the lower pressure flowing over them may extract hot air, pulling colder air up from below. but this is more of a cooling feature than an intake enhancement)

 

also, as a suggestion to anyone using flexible ducting, it'd be better to get a smaller size duct than to bend or crush in parts of a bigger one. a smooth bend in a smaller pipe will not have the turbulence an obstruction like a dent in the larger pipe would cause, and allow the air to flow faster.

that said, this only applies within reason, i.e. a dented 6" duct will probably still pass more air than a smooth 3.5" duct. it's been a while since i calculated anything like velocities of turbulent flows in ducts, but i think a fair estimate would be something like a 20-30% loss for a decent obstruction. so figure out the area ( Area = .785 * Diameter^2 ), and see what difference a 30% knockdown would give.

(since volume of air is area X velocity, and mass is about proportional to volume if you're not compressing it too much - which you're not in these setups)

 

Steve10, if you don't have the pictures already, thats ok. You don't have to go out and do that. I do have one more question though, where did you get the parts to make that intake? Looks good from where i am standing and it sems to be a true cai set up. Well, i think i know what the first piece is on the throttle body. Is that just a pipe reducer from say Home Depot, or is it something different? Thanks for your time-Bryan

 

Well, it all started when I saw a 10' joint of the 3" stainless pipe in the maintenance shop at work. The pipefitter said I could have a few feet of it, so I ordered the 90's from PAC Stainless at his suggestion. I bought the red turbo hose to connect MAF from an import parts house in Austin, and yes, that's a 4"x3" home depot special.

 

Thanks for the info once again! If i want to go that route, now i know where to look, for the most part. Thanks again-Bryan

 

I've got a 4" aluminum cold air pipe you might be interested in seeing. I got the pipe and bends from Burns Stainless, just need to tig it together, make the alum bracket, and polish. One elbow is the vortech supercharger elbow sold in summit/jegs. The down elbow is a mandrel bent aluminum piece. The radiator is currently at the shop having the top heater hose fitting and overflow fitting relocated to the side to clear the tube. It's feeding to a stealth ram so hood clearance is tough. It looks similar to the stainless pipe above. Nice job! My pics coming soon.

 

Still have to polish and get the pipe coated, but here it is... :lala:

 

mocked up on the car

 

finished...

 

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.

 

.

 

Nice work. I like the black better than the metal finish. Are you going to run N2O through it? Also, did you have to cut the frame there to get the air filter to fit? Do you drive it much or is it just a toy b/c i would think it would pick up a lot of junk from driving. Still looks real good though. Love your car all around.

 

I really like the wrinkle finish also. It looks so good in person and it's hard to capture it on camera. Yes, I'm running n2o through it. You can see the blue NX Shark nozzle in some of the pictures about 5" in front of the TB. I removed both of my battery trays last year when I repainted the engine bay. I did this to save a little weight and was hopeful that it might lower engine bay temps.
I don't drive it much- It's mostly a toy. I get about 10 mpg in town. I would be concerned about debris, but most aprehensive about water if this was a daily driver. I could fab a sheet metal airbox for it if I want to. It would probably improve the intake temp even more along with eliminating a lot of the debris/water problems.
Thanks for the nice comments.

 

Once again, nice set up. Really, clean car IMO. I like the top of the stealth ram too, i left that out last post! later man