Rear exit manifolds for flathead 39 Ford Hi Fordbarn,
Does anyone know of a good exhaust manifold that’s a rear exit that will fit a 39 ford standard? My current manifold dumps in front of the steering box and I’m looking for something that will be easier to run a dual exhaust. Thanks, Chris |
Re: Rear exit manifolds for flathead 39 Ford Fenton cast iron headers is all I can think of. I also think one of the parts vendors (Carpenter?) used to make a repop 8BA police manifold,but I don't think they are available anymore. You could look around for one (or maybe even an original?) though.
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Re: Rear exit manifolds for flathead 39 Ford Thanks, let me look around for the police manifolds.
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I have not used one in a 39 but think will be good candidate. maybe some know better. |
Re: Rear exit manifolds for flathead 39 Ford Will isn't this interesting!
From Drake's site: "These manifolds are the single most effective way to increase horsepower through vastly improved exhaust flow, because the key is changing the stock single-exhaust to dual-exhaust." |
Re: Rear exit manifolds for flathead 39 Ford I have a lot to learn. Why to do you scoff at Drakes statement? Doesn't dual exhaust improve delivered horsepower?
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Re: Rear exit manifolds for flathead 39 Ford I have an original "police" exhaust manifold and the exhaust pipe flange is definitely bigger but as far as increasing HP by it self is questionable, exhaust gas flow better YES so maybe better throttle response and cooling
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Duals do sound better, though. |
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From what I've read, the intake tract on a flathead is the limiting factor in gaining horsepower, not the exhaust. Dual exhaust sure sounds a lot better, though! |
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Re: Rear exit manifolds for flathead 39 Ford According to the old magazines
Dual exhaust 10 hp Dual carbs 10-15 hp High Compression heads 10-15 hp All is bolton ;-) |
Re: Rear exit manifolds for flathead 39 Ford AA Ford needs to buy JWL's book to know why he should spend his money elsewhere on his project.
R |
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I'm a big dual exhaust fan, but got to realistic about the expected results. |
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Re: Rear exit manifolds for flathead 39 Ford I wonder if back in the day the muffler was a restriction so the police manifold would give you 2 mufflers on the car. Police needed to be quiet. Seems like it would be a lot of engineering, must have made a bit of difference.
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Re: Rear exit manifolds for flathead 39 Ford Since its an 8ba go with EAB heads.
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Chris |
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Plus the Ford police package included the 255 cu. in. Mercury engine so maybe the factory engineers figured the stock Ford single exhaust was somewhat restrictive. |
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Chris that would be the single best way however economy may suffer a bit. ;) |
Re: Rear exit manifolds for flathead 39 Ford Kube, yes but duals with glasspacks or even straight pipes sound better!!
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C'mon guys! Let's be sure of what we're suggesting that folks should purchase. That eBay unit is a "FRONT" exit manifold for a CROSSOVER pipe! DD |
Re: Rear exit manifolds for flathead 39 Ford Belond equal flow headers. 40% power gain. Always wanted a set. ???????????
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Ken |
Re: Rear exit manifolds for flathead 39 Ford I have Red's headers in my 39 standard with Brockman mellowtone mufflers.
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Re: Rear exit manifolds for flathead 39 Ford Would be interesting if we could see a episode of engine masters do a flathead buildup. Maybe we need to start harassing Freiburger.
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Re: Rear exit manifolds for flathead 39 Ford Have a look at the French flathead exhaust manifolds. Exit high up and to the rear. https://www.35pickup.com/FrenchFlathead.html
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With a 40% increase?:eek: I would too.! |
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That would be interesting! Open it up to all flathead engines used in automobiles from, say 1920 to 1954. OEM blocks, cranks and heads only. Otherwise, anything goes! Use the Engine Masters scoring system to give a level playing field to determine the winner. Maybe go by horsepower per cubic inch. Next, which would be overall horsepower king? 308 Hudson? 346 Cadillac? 359 Packard straight 8? Or a 448 Lincoln V12? Let the games begin! |
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