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Headers or not?
#1
Just had my 351 c. m code rebuilt , with upgraded cam, punched out .030. I torn between going with stock exhaust or headers. Your in put apreciated.
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#2
I personally think headers are an easy power adder, especially if you've modified your engine a bit. Headers significantly reduce back pressure and improve your exhaust flow. It's a no-brainer when think about spending $ modding your engine internals only to have them inhibited by a restrictive exhaust system.

A fairly good summation: http://auto.howstuffworks.com/question172.htm
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#3
I would go for some good headers especially if you have done a few mods.

He has all the vices I admire and none of the virtues I despise
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#4
You need to consider two things. Headers can reduce low end torque.
Ground clearance may become an issue.
For the latter and for keeping a more stock look underneath I went with shorty headers. That will still give you the increased flow (save for a few tiny bits that you will only notice under race applications where you need the very last bit of power) but you can use a stock exhaust system behind them.

[Image: 1z21rv4.png]

Mike

"If I were you...... I´d rather be me."  Tongue

Check out my video:
http://www.7173mustangs.com/thread-my-mustang-in-action

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#5
I have been thinking about this as well. I'm a ways off but was wondering if the shorties buy you much. Also, I'm worried about the whole system being compatible. I don't know what picking headers, pipes, and muffler from three different sources does vs. A complete tuned system. I would love to hear some comments on this.
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#6
I agree with all the comments. Main concern would be ground clearance especially if you have lowered the car. A good set of headers is a must especially if you want to ensure good fitment. I am partial to Hooker so that is the one I installed recently and was the first set that I put on the car back in 73. The Super Comp headers are much larger and give good performance but sit much lower to the ground. The Competition ones tuck in really good and you should not have any ground clearance issue with those. I had the Comp ones installed briefly and they sounded really good with no fitment issues with the exception of the header flange touching the tranny oil pan. I believe that this was because I installed a extra capacity oil pan that was thicker than the stock one. The exhaust collector angles in towards the tranny with this model. I got another set of Hooker Super Comp and again no fitment issues and the exhaust collector exists parallel to the drive train so no contact with the tranny oil pan. Not sure what the final ground clearance will be as I currently have the car on jack stands again. The shorty headers are also a good choice but I have no experience with them. Good luck on your decision.

sdstang;184942 Wrote:I have been thinking about this as well. I'm a ways off but was wondering if the shorties buy you much. Also, I'm worried about the whole system being compatible. I don't know what picking headers, pipes, and muffler from three different sources does vs. A complete tuned system. I would love to hear some comments on this.

I have heard good reviews about the Pypes exhaust system so I decided to go with those. Not installed yet but they are sitting in the garage and the quality looks really good. I'll comment soon when I try to install them.

-john
(jbojo)
351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,
C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

Some Mod pictures can be seen at:

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#7
+1 on jbojo's post. Here is a decent article on the topic. http://www.sandersonheaders.com/Lets-Get-Technical.html

Chuck
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#8
Thanks for the input guys. I like the idea of using shortys but does not look like they are available for 351 4v Mach 1
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#9
manyo;184951 Wrote:Thanks for the input guys. I like the idea of using shortys but does not look like they are available for 351 4v Mach 1

I believe that Travis (aka Doug the Dog) has a source for them.

-john
(jbojo)
351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,
C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

Some Mod pictures can be seen at:

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#10
They are available

http://www.sandersonheaders.com/Sanderso...stang.html

I'd opt for ceramic coating as it keeps some heat out of the engine compartment.

I agree with almost everything that has been said with the one exception being the loss of torque-it's a myth in my opinion and probably caused by a failure to tune engines and make appropriate jetting changes to a cars carburetor after header installation.

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
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