longtube or shorty headers for my 69? - Team Camaro Tech
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post #1 of 9 (permalink) Old Sep 30th, 09, 08:29 PM Thread Starter
 
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longtube or shorty headers for my 69?

I want to put headers on my 69 camaro which has a 350 but I need additional information.

What is the difference between longtube and shorty headers? Which will give me more horsepower and how will they affect the sound of the exhaust?

I've noticed that some headers have skinny tubes while others have thicker tubes. Why is that?

I appreciate your help!
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post #2 of 9 (permalink) Old Sep 30th, 09, 09:57 PM
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Re: longtube or shorty headers for my 69?

It depends on your engine configuration and intended use. What HP is your 350 and how is it built, what about the rest of your drive line? Are you driving only on the street or will you be a regular at the track. There are quite a few posts on this subject already if you search.
I can tell you from personal experience that shorty headers will probably not work well unless they have a rear dump like the stock manifolds and the ones I tried and have seen are center dump.

68 RS Coupe 355/350 TH, Detroit Speed, Hotchkis, Vintage Air, 8.5" 3.42 posi 10-bolt, MagnaFlow 2 1/2" exhaust, etc.

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post #3 of 9 (permalink) Old Sep 30th, 09, 11:27 PM Thread Starter
 
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Re: longtube or shorty headers for my 69?

I have a 350 with a 400 tranny pretty much stock. I'd say it's pushin about 300 hp. It's a street car
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post #4 of 9 (permalink) Old Oct 1st, 09, 01:19 AM
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Re: longtube or shorty headers for my 69?

Shorty tubes are for saving space, not making power.
Any serious tuned length exhaust system will have equal length primaries at ~34-36" in length.

Nov 68 Van Nuys. 327 floor-shift-auto, Frost Green and not much else when new.

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post #5 of 9 (permalink) Old Oct 1st, 09, 07:22 AM
 
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Re: longtube or shorty headers for my 69?

I would run Hooker Super competition long tube headers with 1 5/8" primaries going into a 2 1/2" dual exhaust. That will give you some decent power gains with good torque thru out the rpm range.
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post #6 of 9 (permalink) Old Oct 1st, 09, 10:20 PM
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Re: longtube or shorty headers for my 69?

I like Thorley tri-Y's and have had them on a my '69 with a 400+ HP 350 with a Muncie and now on my '68 with a 300 HP or so 327 and TH350. They fit great on both and are fairly heavy gauge tube so should last. From what I have seen and read they make more torque at lower RPM and the tri-Y design helps the flow. JMHO

68 RS Coupe 355/350 TH, Detroit Speed, Hotchkis, Vintage Air, 8.5" 3.42 posi 10-bolt, MagnaFlow 2 1/2" exhaust, etc.

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post #7 of 9 (permalink) Old Oct 2nd, 09, 10:35 AM
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Smile Re: longtube or shorty headers for my 69?

Shorty headers usually have the collectors at the center of the engine. This is NOT a good place on a first generation Camaro ! The steering box is there !

If you go with Hooker Headers Long tube, get the competition series. Not the Super Comps. The Super comps are larger tube anyway, which you will not want.

Do you know what frame stands you have ? The 302/350 stands the Hooker Competition Headers fit well. The 307/327 stands the Dynomax or Summit brand fit better.

I have heard good reports on the Thorley Tri-y's as fitting either type of frame stand.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #8 of 9 (permalink) Old Oct 2nd, 09, 04:52 PM Thread Starter
 
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Re: longtube or shorty headers for my 69?

I don't know what frame stands I have. How do I find out? What do they look like? I appreciate your help
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post #9 of 9 (permalink) Old Oct 2nd, 09, 10:46 PM
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Smile Re: longtube or shorty headers for my 69?

Here are some pictures of the two possible frame stands and engine mounts.

1969 327 frame stand = approx. 2 5/8" wide.



1969 350 frame stand = approx 2 3/8" wide.



1969 327 (short and wide) Engine mount = approx. 2 5/8" wide



1969 350 (tall and narrow) Engine mount = approx. 2 3/8" wide.


69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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