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Old 07-02-2009, 03:11 AM   #1 (permalink)
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Default Install heat riser and spacer

I have 2 questions:

1.Can someone advise me on how to install a heat riser on a '69 Mustang 351w?
It doesn't seem to clear the front of the exhaust manifold.
Here are 2 pictures of the heat riser:
http://www.fotosop.nl/foto.php?pic=2...1029824287.jpg

http://www.fotosop.nl/foto.php?pic=2...1382648983.jpg

2.Did the factory originally installed a carb spacer? I don't have one and the original air cleaner doesn't fit. It sits to low.

Thanks,

Rob
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Old 07-02-2009, 05:42 PM   #2 (permalink)
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I forgot to mention that the engine is installed in the car.
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Old 07-02-2009, 11:23 PM   #3 (permalink)
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The riser should just bolt onto a pair of studs sticking out of the manifold. If there are none present, you'll have to install them. The riser on my 289 was attached with one stud this way originally, before it rusted off.

And yes, I think there should be a phenolic spacer under the carb. You might run into drivability issues (like vapor lock, fuel boiling in the float chamber) without it. Basically, it does this by shielding the carb a bit from the heat of the engineso the fuel bowl stays cooler. The spacer also provides an outlet for the PCV valve gases to go back into the combustion process. The spacer also could be said to provide a little "ram" effect for the incoming charge also, similar to a miniature "high riser" manifold, by elevating the carb so the incoming charge develops more velocity.
My guess is that stock, your engine should have a 1 inch spacer, but I'm only guessing on this one. Someone should be able to correct or corroborate this height.

Hope that helps a bit.
John
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Old 07-03-2009, 03:49 AM   #4 (permalink)
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Default Re: Install heat riser and spacer

1. I had a new off the lot 69 Mach and it appeared that the riser needed to be attached before the engine installed. That also appears to be the case with my 69 GT350. Maybe someone else knows otherwise because I would like to replace mine without pulling the engine.

2. I don't recall there being a spacer on my Mach and there isn't one on the GT350 though it does have an aluminum high rise intake manifold.
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Old 07-03-2009, 03:51 AM   #5 (permalink)
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Default Re: Install heat riser and spacer

1. I had a new off the lot 69 Mach and it appeared that the riser needed to be attached before the engine installed. That also appears to be the case with my 69 GT350. Maybe someone else knows otherwise because I would like to replace mine without pulling the engine.

2. I don't recall there being a spacer on my Mach and there isn't one on the GT350 though it does have an aluminum high rise intake manifold.
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Old 07-03-2009, 06:45 AM   #6 (permalink)
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Default Install heat riser and spacer

Thanks guys,

1. I do have the studs mounted but the heat riser doesn't fit. Removing the engine to install the heat riser is not a nice option

2. Yesterday I installed a 1 inch spacer on my edelbrock intake so I could install my air cleaner. But it looks a little bit high.
I have a picture of my engine before I painted it:
http://www.hostjefoto.nl/images/yd3a...6lntf2mzam.jpg
I can't figure out what type of intake it is. The Edelbrock site shows other types. The intake is fully open at the top. It's also pretty high by itself. Maybe a 1/2 inch spacer is better.
Unfortunately I can't install the heat riser because then I could make out how high the spacer should be.

Thanks,
Rob
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Old 07-03-2009, 12:48 PM   #7 (permalink)
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I believe you have and Edelbrock Torquer single plane intake manifold on our engine. Because it is a single plane (open at the top) I believe you need a spacer that is open, as oppossed to having 4 holes.
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Old 07-04-2009, 05:40 PM   #8 (permalink)
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Thanks,
Unfortunately I can't find any information about that intake.

Does anyone have an idea about how to install a heat riser while the engine is in the car?
Thanks
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Old 07-04-2009, 08:49 PM   #9 (permalink)
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Quote:
Originally Posted by nl1969mach1
Thanks,
Unfortunately I can't find any information about that intake.

Does anyone have an idea about how to install a heat riser while the engine is in the car?
Thanks

Wish I could help. I've had that shroud on and off my 68 Mustang 289 2V and my
70 Torino 351C 4V, coupla minutes each. First take off the air cleaner, then the shroud!
Seems like a 351W is similar to 289 and 302
just a little taller and wider!
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Old 07-06-2009, 05:02 PM   #10 (permalink)
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Default Re: Install heat riser and spacer

Quote:
Originally Posted by nl1969mach1
I have 2 questions:

1.Can someone advise me on how to install a heat riser on a '69 Mustang 351w?
It doesn't seem to clear the front of the exhaust manifold.



Quote:
Originally Posted by nl1969mach1
2.Did the factory originally installed a carb spacer? I don't have one and the original air cleaner doesn't fit. It sits to low.
Yes - size and shape depended on application
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Old 07-07-2009, 02:39 AM   #11 (permalink)
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Thanks for the picture jeff,
but is it possible to install the heat riser while the engine is already in the car?
If so, do you know how?

Thanks

Rob
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Old 07-07-2009, 09:37 PM   #12 (permalink)
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Quote:
Originally Posted by nl1969mach1
Thanks for the picture jeff,
but is it possible to install the heat riser while the engine is already in the car?
If so, do you know how?

Never tried it on this particular engine/car. Would guess that I would produce my share of scratched & bent pieces before I got it into place. Would first try sliding it in from the front - down the side of the engine

Good luck
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