1968 Pontiac Firebird 350, which headers? - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 04-15-2013, 09:44 AM
Faith - Respect - Trust
 
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No doubt they do cost money and for what you get it does look expensive...but factor in a couple of sets of gaskets and the time it take to replace them...the locks are paid for. I won't put header's on a car now without them.

Ray
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Old 04-15-2013, 09:49 AM
if you beat my boat, well race
 
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with a decent set of header flanges, and proper retightening after heat cycles, they last a while...

most people are lazy, including myself.
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Old 04-15-2013, 10:13 AM
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The most important part being the flanges...and true on both counts, re-tightening after heat cycles and being lazy are the main reasons for blowing out header gaskets...I'm guilty too...LOL.

Ray
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Old 04-15-2013, 10:24 AM
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Double post.
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  #20 (permalink)  
Old 04-15-2013, 10:42 AM
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Once the gaskets take a set and you're sure they're done, using locks will be worth some peace of mind. Maybe not absolutely necessary, but sure can't hurt IMHO.
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Old 04-15-2013, 10:57 AM
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thanks for the help, i'm goign to attempt this after the trans install i am undertaking.
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Old 04-16-2013, 11:31 AM
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Hotrod confused me a little, so are you saying the hedmans i am going to order will not be that bad to install onto my 68. you scared me about lifting the motor etc. i installed the stock log manifolds on the motor by myself and the only thing i really had to move was the starter.
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Old 04-16-2013, 09:27 PM
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Quote:
Originally Posted by starin View Post
Hotrod confused me a little, so are you saying the hedmans i am going to order will not be that bad to install onto my 68. you scared me about lifting the motor etc. i installed the stock log manifolds on the motor by myself and the only thing i really had to move was the starter.
be prepared to.....
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  #24 (permalink)  
Old 04-24-2013, 07:50 PM
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Hotrod confused me a little, so are you saying the hedmans ...
The Hedman #28140 are three-tube headers, so they are not a good choice.
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Old 04-27-2013, 11:45 AM
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why do you guys not like the 3 tube style headers?



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Old 04-29-2013, 07:28 AM
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The purpose of installing headers is to isolate the exhaust pulses fom each other, aiding the sound wave in both intake "filling" and scavenging of exhaust gasses. A "3-tube" header cannot achieve isolation, as two exhaust ports are "talking to each other" on each side. If the heat crossover is not blocked or "filled", you then have FOUR cylinders "cross-talking".

Again, headers should NOT be bought based on "ease of installation". Easy ones are seldom good ones...

Jim
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