| Subject: Re: Header size/fit 82 firebird with 638" BBC + N2O |
Author:
Dan Lemons
|
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Date Posted: 18:47:19 12/19/01 Wed
In reply to:
Dan NPS
's message, "Re: Header size/fit 82 firebird with 638" BBC + N2O" on 16:59:28 12/18/01 Tue
>>. >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, our header fits the stock frame and K member with no alterations, and is made to fit side motor mounts. So, in order to keep plenty of oil pan room (4" each side) we run 2 tubes through the fender well on the pass. side then back under just behind the lower A arm. We do the same with one tube on the drivers side. It sounds like you will have much more room availible inside the frame and would be able to do it all inside. You are right, 2 1/2" tube with a 4 1/2" or 5" collector would work well.
If you need the parts let me know.
Thanks again, Dan.
>>
>>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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