PAformula

iTrader: (1)

What's the deal with the cold air box from SLP? Some people say its junk and some don't.
Is there problems with the plastic breaking?
Should I get one or not?

Thanks,
Jason

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1989 FIREBIRD FORMULA 350
K&N, ACCEL CAP & ROTOR,
FLOWMASTER AMERICAN THUNDER CAT-BACK

jimbo

I've had one on my car since 1991 with nary a problem. Looks just like o.e.m. and is a high quality piece. It's not cheap, but you know the old saying...

...whether you buy one or not depends entirely on how you regard your car...if you have a car that's a junkyard dog you can fabricate a cheapie piece that'll probably work just as well. If you have a righteous looking ride and you want to keep it looking that way go for the quality pieces and parts...

...the SLP cold air box is one of them...



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jimbo

Mosquito Coast F-Body Association (MCFBA)

1991 Formula SLP350
1999 Trans Am Firehawk

Jim 86 Bird

I'll second Jimbo's opinion. I'm very happy w/ my newly installed SLP airbox. Knocked 2 tenths off my 1/4 ET and throttle feels a LOT smoother.

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http://www.tcnj.edu/~esposit3
https://www.thirdgen.org/rides/index...ew&rideid=1137

• '89 Trans AM, 305 TPI, 5-spd
• '86 Firebird, 2.8, Auto

AOL IM Name: JimmyTime5

Gta-Paladin

What about the SLP Dual snorkel cold air is it really worth it any opinions? It requires relocation of the bat

afgun

I bought my SLP cold air box used and it held up under the first use, shipping and my use just fine. Fits and looks great too! Just a PITA relocating things under the hood.

jimbo

I looked at it but decided that I didn't want to relocate the battery to the trunk. It'll get more air into the engine, but unless you have a fairly modified engine I doubt that you would really see any performance gains.

PAformula

iTrader: (1)

If anyone could supply me with info on relocating the canister, that would be great.
I wanted to make my own bracket to mount it. If someone could give me dimensions, that would help, too.

Thanks,
Jason

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1989 FIREBIRD FORMULA 350
K&N, ACCEL CAP & ROTOR,
FLOWMASTER AMERICAN THUNDER CAT-BACK

afgun

It was fairly trivial to relocate the canister, just time consuming. I used zip-ties to attach it to the cruise control bracket. Moved the hoses and pulled the wiring back through the loom to the other side of the engine bay.

Greg '85 T/A

You may have heard that from me. The flange on mine cracked after a few years. Recently, the round fitting on the cover broke loose. I bought a new cover and fixed the crack from the inside with fiberglass.

All in all, I am very happy with the function of the cold air setup. Its pricey, however. Just take care that you don't overtighten the bolts to the fenderwell or the duct clamp to the cover and you may avoid my problems.

I see that you have an '89. What's wrong with your stock setup? You can cut windows in the side of the filter "can" or re-direct the snorkel etc., etc. (do a search on this subject) I'd much rather have something made of steel than plastic.

(BTW, when I bought mine, SLP was showing pictures of their steel box proto-type. I was dissapointed to find that the production version was plastic. Oh well, its lighter, right? )

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-Greg

'85 Trans Am - WS6,TPI:
Original owner, original paint/engine/interior, plus the usual bolt-ons

PAformula

iTrader: (1)

quote from Greg '85 T/A:
"I see that you have an '89. What's wrong with your stock setup?"


Plenty, Its almost impossible in access the filter since its too close to the canister. Plus its very restricive like anyone will tell you. Since I already have a K&N filter I wanted to just my the Box itself and save about $130.

Make sense?


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1989 FIREBIRD FORMULA 350
K&N, ACCEL CAP & ROTOR,
FLOWMASTER AMERICAN THUNDER CAT-BACK

Greg '85 T/A

It makes sense to draw cold air thru the intake -

- but, I have NEVER heard that the '88-'89 stock air cleaner assembly was "very" restrictive. It was a big improvement over the '85-'87 setup. Lingenfelter built a number of cars (including 383-powered) in the late eighties using the stock intake system.

Let us know if you get a SOTP or 1/4 mile improvement by just adding the SLP box!

Maybe all you folks with the restrictive '88-'89 air cleaners can help shed some light on this - I guess I learn something new every day!

PAformula

iTrader: (1)

Ok, you've made your point. Maybe the stock is OK as is, but Why is it so d*** close to the canister.
Trust me, try to remove/intall the air filter on a stock '89 filter assembly. I quanantee you will be swearing at it.
All I was trying to accomplish is gaining some performance while getting the air filter more easily accessable.

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1989 FIREBIRD FORMULA 350
K&N, ACCEL CAP & ROTOR,
FLOWMASTER AMERICAN THUNDER CAT-BACK

Greg '85 T/A

jason350,

Everything in life's a tradeoff. You should have heard me swear when I had to troubleshoot a headlamp door (the relays for which will now be covered by your SLP box).

Since the box is only $65 or so, I say go for it! Filter access will be thru 4 dzus fasteners - very quick and simple.

Gta-Paladin

HAs anyone purchased the dual snorkel cold air? Do you think i could mount my battery in my "glove box" which is in the trunk without problems... I just dont want it to be seen.. any other ideas on where i can hide it yet still retain easy access?

Brian Shaughnessy

I got the cold air kit used for my '89 but I've never installed the box yet. I did install the main hoses from the air filter to the maf and the maf to the throttle body as there are some funky metal duct work inside them as opposed to the stock ones.
My el cheapo solution to the air filter was to remove the stinking air filter can. I plopped my K&N right onto the base right next to the charcoal cannister and just because I had them, I used the air filter lid and long bolt from my '90. The '90-'92 air filter can and lid assembly is different from the earlier ones. For my '90, I had installed a cone filter since it's an SD so that's why it was laying around.
It seems to work OK but I might end up actually relocating the charcoal cannister and installing the box at a later date if I determine I need more cold air somehow.
I've heard of other people drilling holes into the air filter cans but seeing as how I got open air filter that's sealed top and bottom I don't know why they're setup would be better than my low buck solution.


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'89 Formula - Thunderchicken - 355 Vette L98/T-56/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.

Steve87Pont

I have the twin intake. On my '82 (Converted to TPI) I installed the battery where your suggesting. Tho' not very accessible since I used the biggest series available. Now on my '87 I use the Moroso battery box mounted in the middle of the trunk well. Improved handling as well.

jimbo

I mounted my canister right next to the battery using it's own bracket. You have to remove the canister first if you want to remove the battery, but how often do you do that?

formul8!!

If I get the SLP box for my '89 Formula, where does the charcoal cannister go? Inside the box?