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#1
06-17-2017, 08:20 PM
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Header recommendation
My GP is the "mother of all exhaust leaks": I've just discovered my third cracked RH exhaust manifold.
I'd like to try a short tubular steel header and see if I can get past this and on to something else. Anyone have a recommendation or a favorite for an inexpensive header for light driving (not Super high performance) use? Thanks in advance - K
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'63 LeMans Convertible '63 Grand Prix '65 GTO - original, unrestored, Dad was original owner, 5000 original mile Royal Pontiac factory racer '74 Chevelle - original owner, 9.56 @ 139 mph besthttp://www.superchevy.com/features/s...hevy-chevelle/ My Pontiac Story: http://forums.maxperformanceinc.com/...d.php?t=560524 "Intro from an old Assembly Plant Guy":http://67-72chevytrucks.com/vboard/s...d.php?t=342926 |
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#2
06-17-2017, 09:59 PM
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I have the cheap summit racing 2nd gen F body headers on my '66. It's pretty snug around the passenger A arm and the steering box but fit.
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#3
06-19-2017, 11:50 AM
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Ram air restorations ceramic coated cast headers never leak. i mean ever. lol they use steel gaskets to seal and the mounts are super thick, because, well, they are cast iron. bahahahahahaha. Seriously though, they are fantastic. required a mini starter but otherwise great
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It's hard to soar like an eagle, when you're surrounded by turkeys! My wife says she'd llike my car a lot more if it wasn't mine.   64 Grand Prix 389 .030, 1.65 Scorpion Rollers, Tripower, RARE Long Branch, Custom Stainless Exhaust and mufflers, 3.90 posi 200-4R. 068 cam. |
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#4
06-19-2017, 04:44 PM
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I wonder why your manifolds keep cracking? Seems unusual to me.
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#5
06-19-2017, 04:47 PM
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I missed the "inexpensive" comment. My bad. Summit headers have 3/8" flange I think. Is your exhaust really tight? Is there lots of movement for the motor to twist? I too am curious about the cracking manifolds
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It's hard to soar like an eagle, when you're surrounded by turkeys! My wife says she'd llike my car a lot more if it wasn't mine. 64 Grand Prix 389 .030, 1.65 Scorpion Rollers, Tripower, RARE Long Branch, Custom Stainless Exhaust and mufflers, 3.90 posi 200-4R. 068 cam. |
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#6
06-19-2017, 05:03 PM
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They're bolted on tight at the flange. Not a ton of room for the engine to twist around.
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#7
06-19-2017, 05:07 PM
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I have found in the past if the exhaust system isolators are too loose and bouncy it has an effect on the manifold. Just a thought.
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It's hard to soar like an eagle, when you're surrounded by turkeys! My wife says she'd llike my car a lot more if it wasn't mine. 64 Grand Prix 389 .030, 1.65 Scorpion Rollers, Tripower, RARE Long Branch, Custom Stainless Exhaust and mufflers, 3.90 posi 200-4R. 068 cam. |
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#8
06-19-2017, 05:09 PM
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#9
06-19-2017, 05:29 PM
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My system is pretty light. Headers, cherry bomb header glass packs, turn downs. Won't be a lot of flex
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