Re: 87 camaro bb headers -- Lemons Header Message Board

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Subject: Re: 87 camaro bb headers

Author:
Dan Lemons

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Date Posted: 18:51:26 11/29/01 Thu
In reply to: mark 's message, "Re: 87 camaro bb headers" on 00:55:37 11/29/01 Thu

>>>Hi, I have a std. height 454 with dart pro one heads.
>>>I feel that the hooker supercomps I have now are
>>>holding me back quite a bit. The car has a 714 roller
>>>set up and will rev easily to 7500 but I am not
>>>getting any performance gains after about 6200. I
>have
>>>a turbo 400 in there now and have found the car goes
>>>quicker shifting at 6200. Are the headers I have now
>>>full of spent gasses? The car runs 9.85 @ 136 at 535'
>>>above sea level. I run a 1050 Holley on gas.The car
>>>weighs 2900 with driver, rear gear is 4.56 and trap
>>>rpm about 6500. What do you think of putting a larger
>>>header on it?
>>
>>Hi Mark, thanks for the e-mail. If every thing else is
>>correct with the motor and it flattens out at 6200
>>rpm, then yes the headers are probably maxed out, they
>>just can't flow any more air.
>>What cu.in. do you have? Do you use nitrous? Do you
>>know how much hp you should be making?
>>Let me know and we should be able to come up with the
>>best tube size. Thanks again, Dan Lemons.
>Hi again, no nitrous, right now std. bore 454 but I
>also have a 502, motor should be between 675 and 700
>hp and I am not experiencing any problems with it.

Hi Mark, If you are using mufflers, take them off and see if the car picks up. If your current header is a 2 1/8" tube with a 3 1/2" collector try cutting off the collector and installing a 4" collector to see if there is a change.
I suspect that you need a 2 1/8" stepped to a 2 1/4" tube with 4" collectors. If you plan to use nitrous in the future you could possibly use a 2 1/4" with 4" collectors and use an exhaust system to help build bottom end back into it. You haven't mentioned the size header you are using now, that would help me. Thanks again, Dan.

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Replies:

Subject	Author	Date
Re: 87 camaro bb headers	mark	03:17:17 12/01/01 Sat