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Old 08-07-2012, 12:45 AM
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Heated intake manifold

Hi i have put headers on my 250 L6 engine would it be possible to use water to heat up the intake manifold... Originally it uses exhauste gases from the original exhaust manifold tO heat up the intake manifold
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Old 08-07-2012, 05:59 AM
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Not sure why this is in transmission - rearend forum. Moving to engine forum
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Old 08-07-2012, 06:20 AM
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Many Datsun engines use cooling water for manifold heat. There is a hose coming off the out on the water pump, that goes into the intake manifold just below the carburetor, and the manifold has holes that go into the cylinder head. The manifold is aluminium.
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Old 08-07-2012, 06:55 AM
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You need one of these.
Online Catalog | Langdon's Stovebolt Engine Co.
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Old 08-07-2012, 07:15 AM
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Carb heat

Some older Fords used hot water for carb heat. Years ago I split my Chevy 6 manifold and kept the exhaust pasage-heat in place.
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Old 08-07-2012, 08:05 AM
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Heated intake manifold

I have four inlines with multiple carburetors. One is heated, the other three are not. I live just west of Sacramento, CA and too date no troubles. But, during colder weather I do allow those that are unheated to warm at a fast idle for three or four minutes after starting from a cold engine.
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Old 08-09-2012, 11:24 PM
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Ok that's great thank you..
Do u not find you have flat spots on acceleration with no heated manifold..
So with the stovebolt part would u need another water pump with an extra outlet to feed it or can u just route a pipe from an original water line
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Old 08-10-2012, 06:53 AM
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Once they get heat from the cylinder head, they will run ok. The exhaust heat just gets the intake up to temp faster in a cold climate. Fords did use coolant heat in many of there inline 6's. There is at least a kit for the 235 to do the same, but I would expect it's available for the 250 also. It's a carb riser
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Old 08-10-2012, 07:30 AM
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Ray
THe one on my truck the hoses ran from the water pump thru the heater core then thru the heat plate and back to the thermostat housing. Some thermo housings have 2 drilled and tapped fittings on them. One for the temperature sender and one that's plugged off. Mine had the raised area for the plug but it wasn't drilled out. We drilled it and tapped it for a nipple to tie back to.
My truck ran like crap without the heat plate. Even had some hesitation when warmed up but I live in a coolish part of the world. Rarely higher than 85*. Normally 70*.
An hei conversion helped a bunch.
If you're going to go with a 4 bbl intake look for a clifford one if you want to heat it. Some of their intakes have a heat chamber built in.
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Old 08-10-2012, 08:07 AM
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Found a link to a pic of mine.
Water heated intake plumbing - The 1947 - Present Chevrolet & GMC Truck Message Board Network
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