Need help with headers selection - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old Sep 8th, 16, 06:56 AM Thread Starter
Tim
 
Join Date: Aug 2016
Location: Charleston sc
Posts: 12
Need help with headers selection

I have a 69 camaro with a sbc 383 stroker with aluminum heads, 4 speed Muncie, power steering, no a/c. I'm looking for full length headers, preferably ceramic. Looking for recommendations on a set for best fit and performance without breaking the bank. Thanks

Last edited by Weltertm; Sep 8th, 16 at 07:10 AM.
Weltertm is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old Sep 8th, 16, 07:16 AM
Team Member
Darin
 
ilikeike's Avatar
 
Join Date: Jun 2013
Location: Stanislaus Co. Ca.
Posts: 1,442
Re: Need help with headers selection

Dynatech and Doug's seem to fit well on first gens,
Hooker has a new design for camaros that is suppose to be much better than their old design.

They all seem to be around $700 coated.

1968 Butternut Coupe,
421" Dart SHP block
TKO 600 RR
Dutchman 9" w/3.70 US Gear Lightning r&p
Speedtech torque arm,Ridetech HQ coilovers
Global West arms
Budnik wheels

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
ilikeike is online now  
post #3 of 10 (permalink) Old Sep 8th, 16, 07:17 AM
Moderator
John
 
Vega$69's Avatar
 
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 12,683
Garage
Re: Need help with headers selection

Straight or Angle Plugs?

2017 Corvette ZO6 with ZO7 Option
66 Chevelle Protour LS3/525(SOLD AT Mecum 2018)
69 SS396 Cortez Silver(SOLD)
69 Z28(Sold)
69 Pro Tour - LS3/T56
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(SOLD)
69 Pro Tour - LS7/T56 (SOLD)
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

69 Z28/RS Tribute355/5 Speed (SOLD)
69 RS Clone 427/TH400 (SOLD)
67 RSZZ502/5 Speed (SOLD)
69 Camaro 406 SBC/TH400 (SOLD)
Vega$69 is offline  
 
post #4 of 10 (permalink) Old Sep 8th, 16, 07:28 AM Thread Starter
Tim
 
Join Date: Aug 2016
Location: Charleston sc
Posts: 12
Straight plugs
Weltertm is offline  
post #5 of 10 (permalink) Old Sep 8th, 16, 07:52 AM
Moderator
John
 
Vega$69's Avatar
 
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 12,683
Garage
Re: Need help with headers selection

Hooker

2017 Corvette ZO6 with ZO7 Option
66 Chevelle Protour LS3/525(SOLD AT Mecum 2018)
69 SS396 Cortez Silver(SOLD)
69 Z28(Sold)
69 Pro Tour - LS3/T56
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(SOLD)
69 Pro Tour - LS7/T56 (SOLD)
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

69 Z28/RS Tribute355/5 Speed (SOLD)
69 RS Clone 427/TH400 (SOLD)
67 RSZZ502/5 Speed (SOLD)
69 Camaro 406 SBC/TH400 (SOLD)
Vega$69 is offline  
post #6 of 10 (permalink) Old Sep 8th, 16, 08:28 AM
Senior Tech
Dave
 
Join Date: Dec 2005
Location: Tampa, Florida
Posts: 4,681
Re: Need help with headers selection

When selecting headers a few things to consider are size and application. Race only won't have an exhaust system so it won't have header flanges to bolt on a reducer for the four inch diameter collector. I know the NHRA requires mufflers now but if you have ever seen a NHRA approved muffler it looks to be the size of a CAT and has a straight through four inch hole that doesn't really do anything other than comply with the rules.

Racing headers are made of equal length tubes and the length of the primary tube and the collector are tuned to the power band that the motor makes peak power The headers are shipped with a slip fit tube not welded together so that you can tune to length before welding them up. This is done to scavenge the exhaust gasses out of the cylinders just before the exhaust valve closes (selecting the cam's exhaust duration is part of the tuning process). A standing wave will only exist in an open pipe. That is why pipe organs have open pipes and not Flowmaster or Dynomax mufflers on the top. Install a muffler or a pipe that is too long for the frequency of the wave and you get nothing as far as scavenging goes.

There is another affect that makes a header more useful than a cast iron manifold and that is in segregating the exhaust pulses. You can think of the exhaust not as a steady stream but as a series of hot high pressure plugs of gas trying to escape to a lower pressure area (entropy in action). If you have a cast iron log manifold and it is attached to a small block Chevy then cylinders five and seven are firing sequentially (bang-bang). As such cylinder seven is attempting to close it's valve as cylinder five dumps another plug of hot gas into the log manifold. That creates an area of higher pressure outside of the open exhaust valve in cylinder seven allowing exhaust gases to flow past the not yet closed valve. This dilutes and reduces the volume of the next incoming charge of fuel and fresh air. Contrary to what the EPA thinks introducing exhaust gasses into a running engine interferes with combustion, as well as their desired goal of lowering emissions.

By making the length of your pipe(s) between cylinders five and seven eighteen inches long or longer you can prevent that cylinder contamination from happening (Nine inches pipe on both cylinders accomplishes this, or some combination of length to the collector and back again). How much depends upon the volumetric efficiency of your engine; but up to twenty five horses have been recorded on dyno tests of no other change than just bolting on a set of long tube headers in place of cast iron manifolds.

In terms of generalities the bigger the primary tube the less likely the headers will fit your car without a lot of swearing and possibly modification of parts. The gain is to peak horsepower with a larger primary tube diameter, at the expense of bottom and mid range torque. The converse is the smaller the primary tube the more bottom end and mid range torque you will retain for street driving at the expense of total horsepower. A smaller tube header will fit with out near as much fuss as it takes up less room under the hood.

Ceramic coated headers (if coated inside and out and not just on the out side) will make more power and last longer than un painted mild steel headers of the same size. This is due to the heat being moved out of the engine bay with out first preheating the under hood air to increase the air density. The ceramic coating (water glass) insulates and reflects the heat back into the gas placing it further back in the exhaust system where all it can do is heat up the floor under your feet and increase the heat in the gas lines.

Big Dave
Larger Dave is online now  
post #7 of 10 (permalink) Old Sep 8th, 16, 08:28 PM
Gold Lifetime Member
Chris
 
Join Date: Oct 2013
Location: Texas
Posts: 1,035
Re: Need help with headers selection

Dynatech! I have them on my 302 and they clear the PS with no hammer work. Also, I'd never buy headers that didn't have a ball and socket style connector at the collector; sure beats having to perfectly align two flat flanges with a gasket. Transition connectors from the collector to the exhaust pipe are made of stainless.
ctcz28 is offline  
post #8 of 10 (permalink) Old Sep 8th, 16, 10:18 PM
Senior Tech
Doug
 
Join Date: Jun 2016
Location: Hopewell, Va
Posts: 216
Re: Need help with headers selection

Here is a link to a set of Hooker headers and a set of Dynatech headers. https://www.summitracing.com/parts/d...t/model/camaro https://www.summitracing.com/parts/h...t/model/camaro Be your to check your exhaust ports for the shape before ordering headers the Dynatech are oval shape ports and the Hookers are D shaped ports. You didn't say what brand of heads you have only aluminum.
camarodriver67 is offline  
post #9 of 10 (permalink) Old Sep 9th, 16, 01:20 AM
Senior Tech
Cory
 
Join Date: Jul 2014
Location: South Miss.
Posts: 299
Re: Need help with headers selection

I have a Big Block so not sure how it will for on yours - BUT Flowmaster makes some Nice Stainless coated headers for a fantastic price! I have long tubes and they fit well for me. Give them a look

1968 Firebird - Gen IV 496 Stroker - TH400 - Caltrax rear suspension system w/slider boxes - Corporate Posi Rear with New Axel's - Long Tube Headers, Pypes Race Pro Dual Exhaust and Lotsa other Goodies =)
Arkangel77 is offline  
post #10 of 10 (permalink) Old Sep 9th, 16, 06:43 AM
Senior Tech
Scott
 
Join Date: Feb 2013
Location: Southern NH
Posts: 2,457
Re: Need help with headers selection

Another vote for Dynatech, very high quality and ceramic jet coated both inside and out with a ball and socket collector setup. They aren't the least or the most expensive headers available but as far as value goes (cost for what you get), they are right up there.

69 Camaro Z/28 RS, original Azure Turquoise, M21 & 3.73 12-bolt posi. NOM 406ci, AFR 210 heads, Straub hyd. roller cam & Dynatech 1-3/4" > 1-7/8" headers, QuickFuel 750 Annular. Photos at:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
NH69Z28RS is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome