Does anybody know how much of a difference there is performance wise between the single inlet and duel inlet SLP cold air induction systems for a 91 tpi firebird. Would I benefit much more fro the duel inlet than the single inlet with that being the only engine mod besides an airfoil, and performance plugs and wires.
Has anybody tried one or the other?

 

Are those the only mods your going to ever be doing? If so, get the single. If you are going to do more, I'd get the dual but it's a PITA to relocate the battery correctly.

IMO the single is fine for anything up to 350ci, anything bigger of HO get the dual...

 

i want to get the single one soon, it bet its better than the stock air box...
i was looking at just getting the single box and canister wiring harness, how does the air filter go into that because it doesnt really say?

can i just reuse my k&n filter i have right now...

 

Yes you can, they use the stock filter size. It goes in from the top just like your factory canister...

 

Why not just get the K&N filter that goes directly over the throttle body. IMHO it looks way better and should provide more air too. It will prolly be hotter air, but more air none the less.

 

U said it. the hot air is pointless. itd be better to have less cool air then more hot air. To be a proper CAI its has to be cold

 

Exactly, why the hell would you put an air filter right on the TB? All you get is all the hot air from the engine compartment, that's the whole point behind CAI's...

 

I was just saying it looks better that way. Way cleaner in my opinion. This has been debated time and time again, especially on the tbi board if an open element is better or not, which has been proven to produce gains over the factory cold air. I doubt you will really see any huge gains with a CAI anyways.

 

U wouldnt see big gains from a CAI but u wouldnt see any from a a WAI. i say it looks cleaner but id take the power added over the look getter

 

Ok a few things.

1 Cone filters on TB's dont work for us with mass air systems, and pick up way to much heat from the engine compartment to be practical

2 With a dual cold air set up you can flow more air but it might not be nessary and to run a dual intake you need to relocate the battery. Relocating the batery is both good and bad it helps with weight distribution, However I believe that a trunk mounted battery in a hatchback needs to be secured in a battery box with a vent tube according to NHRA rules. If this is not a concern then i think bmr fabrication has a battery tran that mounts in the spare tire well.

 

When I first got my T.A. I put one of those filters directly on the tb because it looked so good. I had only owned carbed cars previous to this and new nothing about TPI. It ran great when you first started out but after about five minutes of driving when the engine got hot it ran like crap with lousy throttle response. I took it off after about two days. $50 wasted.

 

I figured I'd mention this just for the benefit of TPI Firebird owners considering the SLP kit - JUST BUY THE AIRBOX! SLP Part #21015 includes the airbox and the airbox lid for $69.95. You retain your original ducting, and you just need some wire and vacuum line to move the charcoal cannister.

I think the intake ducting and MAF bracket included with the kit are for Camaros, since they do not have these pieces.

This was peviously stated by someone else on the board, and I followed his advice and found it to be true.

 

On the note of getting the Airbox only. I would have to say that the OEM ducting that came with the cars is significantly smaller than the ducts that come with the SLP kit. I would think that it would matter in the long run.

 

this is going to sound stupid ... but here goes.

i've looked at the slp cold air kits on their webpage, but don't understand exactly where they draw cold air from.

does anyone have pics of one installed?

 

Sure, here is a pic of my Firehawk:

Sorry about the size, it wouldn't let me upload anything larger.

 

I just recently completed the installation of the SLP Cold Air Kit. It draws the cold air from the fenderwell. The box matches the cutout in the fender support on the passenger side of the engine compartment. There is a rubber seal on the box that keeps air from the compartment from comming into the intake. So the only air that it can pull from comes from the fenderwell underneath the car.

Also it is worth noting that if you have a Trans-AM with the fender air vents it would technically be able to pull air in from there as well. Not sure how much if any that would help. But it is technically possible.

The installation of the kit helped with throttle response and it changed the sound of my exhaust alot. I am quite fond of the kit. The only thing that sucks is relocating the charcol canister. In my engine compartment there isn't enough room for that the battery, and the MSD box.

I am now in the process of relocating my battery to the trunk.

 

yeah i am waiting to relocate the battery so i can get the dual slp intake.

 

I found out the deal with this. You can do this only if you have a 1988 or newer Firebird. 1987 and down have a different duct system.

In fact SLP provided the duct to Pontiac at the time. So the ducts on 1988 cars on up are the same. So yes you can get just the airbox. Or you can simply cut holes in your factory airbox to get about the same effect.

But for 1985-1987 cars you will have to get the whole thing. Unless you can find an intact TPI air duct system in the bone yard for the 1988 and up cars.

 

so for the dual SLP intake for a 91 z you would have to relocate the battery!? I really want to see a picture of this installed... w/ detailed pics... I'm very confused. heh.

 

suckN from the fender doesnt seem like a benefit unless you have some kind of scoop directing the flow to the box, has anyone really made an effective set up for the SLP box?

One member here has a march scoop on a 91 bird, that seem to be the most effective ram air, has anyone else added a homemade ram air??