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Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

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Old 12-13-2003, 10:40 AM   #1
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Join Date: Sep 2003
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Car: 87 Firebird
Engine: 305 LG4
Transmission: THM700R4

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Cold air intake on Carb

I was wondering if any one has any ideas for a cold air intake on a car running a carb besides the 305 HO dual snorkel?

My problem is I'm running a 14" open cleaner and I feel its not helping me too much. The dual snorkel setup seems good but takes up to much room looks bad and seems restrictive.

I was thinking rig up a 14" cleaner(closed) with two pipes on either side of the engine coming half down the radiator with big cone flters. The pipes would either be metal with a heat resistent coating or plastic and kind of look like the cold air intakes on imports or newer small engine moded cars.

Would any this help and what spot in the engine is best for incoming air(where to put the cone filters)?
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Old 12-13-2003, 12:17 PM   #2
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I ran an open element when the LG4 was stock. I raced it for one season (the '57 was down with tranny problems), and tried to keep the engine cool before runs so the hot-air effect was minimized.

The factory dual-snorkel does take up a lot of room. But, what else are you going to be doing in there? It's not like you need it for legroom.

Whatever you do, you want the air source to be away from the engine and radiator heated air. If I'm reading what you're thinking correctly, you want to feed the system from beside the radiator, with holes cut in the panels beside the radiator. It'll be tight, but I suppose you could fit it that way.

Here's my homemade system on the '57. The housing is from the '66 Impala from which the engine/tranny came. The stock snorkel is gone - talk about restrictive! It's smaller than an LG4 snorkel opening! I had a couple of late-'70's air cleaners laying around, stole the snorkels from them and pop-riveted them to the '66 housing.

The housing is so drop-based that I added a spacer between the airhorn and base to give some space between the lid and the airhorn. That helped. The overall result was a reduction in both 60' times and 1/4 ET in back-to-back comparison with the open element (I'd give you the numbers, but I'm about 1100 miles away from my logbook right now).
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Old 12-13-2003, 03:37 PM   #3
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www.ramairbox.com
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Old 12-13-2003, 04:19 PM   #4
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Quote:
Originally posted by F-BIRD'88
www.ramairbox.com
That looks pretty good and not to pricey.

Does the aluminium tubing heat up and kill the advantage of the cool air its bring in?

Anybody have one of these and any results?
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Old 12-13-2003, 06:33 PM   #5
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The aluminum rejects heat fairly well. I spray it all down (garden sprayer w/water) between rounds anyway.
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Old 12-22-2003, 06:30 PM   #6
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ATI and Vortec make carb bonnets for there S/C setups, wouldn't be hard at all to fabricate a CAI out of one of them.

Here's the bonnet I had on my ATI s/c'd TBI camaro.
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Old 12-22-2003, 06:30 PM
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