Re: Header size/fit 82 firebird with 638" BBC + N2O -- Lemons Header Message Board

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Subject: Re: Header size/fit 82 firebird with 638" BBC + N2O

Author:
Dan NPS

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Date Posted: 16:59:28 12/18/01 Tue
In reply to: Dan Lemons 's message, "Re: Header size/fit 82 firebird with 638" BBC + N2O" on 06:35:25 12/17/01 Mon

>. >Dan: building a back half car w/ 638" N20 should run
>>about 1,500HP. 82 firebird with tubular K member and a
>>dry sump (large) oil pan. probably wind up making my
>>own headers. Primary pipe diameter 2 3/8 or 2 1/2?
>>need muffs also, is 4" or 4.5" collector too small?
>>would like muffler recommendation. what do you get
>>($) for a weld up kit, inside frame; under oil filter
>>pad (relocated) & starter.
>
>Hi Dan, Thanks for the e-mail. The only kit I could
>give you would be 3/8" flanges, slip on collectors and
>U bends which would be about $432.
>Although the header we make for that car is based on
>the engine in the stock location and we can compensate
>for the tall deck and any head type. We can make any
>tube size you need up to 2 1/2" and any collector size
>up to 5". Our design has 2 tubes on the passenger side
>going around the frame and 1 on the drivers side
>around the frame in order to get more oil pan room.
>The collectors end up along side the transmission and
>it's a merge type collector with a trasition cone
>inside. We have 4" of clearance from a stock oil pan
>on both sides. Will that clear your starter on the
>drivers side and your dry sump lines? This header will
>also clear mid plate or solid side mounts. We charge
>$850 for them stepped or not. Thanks again, Dan Lemons.
>
>Additonal info: Sorry I forgot about the muff's. Our
>collectors are directed to run exhaust along side the
>drive shaft, but due to the floor in that car you
>would have to alter the floor under the rear seat to
>fit mufflers in. I usually recommend Flowmaster for
>performance and price.
>Thans again, Dan.

Thanks for the info, what exactly does "around the frame" mean on those cars? I have a set of Jack Davis and Ed Quay headers and although they are not as large 2 1/8 + 2 1/4 they fit inside the frame rails. Do your primary pipes fit around the K member or do I need to cut holes in the "inner fenders" for clearance? The reason why I will end up making my own is that I am fitting a tubular K member for the car which is incompatible with my existing headers, but allows for a lot of additional room for headers (mo motor mounts or pads) My existing exhaust uses race magnum (glasspacks) under the front seats w/ turndowns. I assume that 2 1/2 primaries are not too big? thanks again. Dan

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Replies:

Subject	Author	Date
Re: Header size/fit 82 firebird with 638" BBC + N2O	Dan Lemons	18:47:19 12/19/01 Wed