[WANTED] Slant Six Exhaust Mannyfold
- Thread starter RustyRatRod
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If you're in no hurry, I just picked up a 78 Volare to part out, it has a Super Six on it. Rumor has it, these exhaust exits were a little larger? I'd need confirmation from one of the gurus on this. I will be getting into this Volare shortly.
I'm not in a hurry. I am trying to get everything together for my 225 build for the Valiant. I could actually use two, so if you can confirm that one has the larger outlet, I am interested and at least I would know what to look for.
Have you ever tried calling Silver Seal... They make repro slant 6 exhaust manifolds at reasonable prices... When I had my ex's slant built, they shipped me one in three days for under $200 to my door after telling me that they 'were out of stock and it would be shipped by the manufacturer'...
I'm not sure of the outlet diameter, call them and ask....
Silver Seal Products, Inc.
Never heard of them. I see they carry Dorman and I assume that's the line it would be in. I have seen several and they are ok castings but do not have the larger diameter. They are around 1 7/8.
My head guy in Michigan recommended them to me...
I will give them a shout and see what they say. Thanks, Karl.
Here is a great comparison for you RRR
1972 Duster Slant 6 on left, small pipe.
1976 D100 Slant 6 on the right, 2" flange opening with 1 7/8" OD pipe.
Thinking the later 6 manifolds are going to have a better bigger exit.
ebay has used later model ones for 100.00. Think the trucks are going to be best.
Side note: 1976 Dodge D100/D150 225 /6 had the best factory cam for performance of all the slant 6s made. So you would think that manifold would breath better too.
Manifolds can easily be turned upside down, use an end milling machine and open up the exit to the full 2 inches.
Good Going on the Slant 6 Build.
76 Truck Left below
1972 Duster Slant 6 on left, small pipe.
1976 D100 Slant 6 on the right, 2" flange opening with 1 7/8" OD pipe.
Thinking the later 6 manifolds are going to have a better bigger exit.
ebay has used later model ones for 100.00. Think the trucks are going to be best.
Side note: 1976 Dodge D100/D150 225 /6 had the best factory cam for performance of all the slant 6s made. So you would think that manifold would breath better too.
Manifolds can easily be turned upside down, use an end milling machine and open up the exit to the full 2 inches.
Good Going on the Slant 6 Build.
76 Truck Left below
oldmodlover
Well-Known Member
Check your mail.
That tells us there were possibly at least TWO different sizes, Casey, thank you! This is good information.
And Doug, it was good to talk to you today. Thank yall for all the input so far.
Still lookin!
my68barracuda
Well-Known Member
I have a couple of slant six exhaust manifolds that you can have for free, shipping from 46220 would be on you. Or if you get around Indy, free pick up.
Ok. I will take the regardless, if shipping isn't too terrible. PM coming.
pishta
I know I'm right....
RRR, they are out there. This mic'd at 1 15/16 if not a flat 2.00. Its an early 60s model casting without ribs. Casting number 2121676 ( may be a '59 designed for '60 casting as "21" is a 1959 prefix for lots of '59-'60 designed parts) in pic. It would take you about 5 minutes with a round file to get this to a clean 2.00. They added ribs in the later castings to combat cracking. IIRC a 16th difference in diameter is .993% smaller than a 2.00 so maybe searching for a 2.00 over a 1 15/16 is a moot point, with plenty of meat to wallow out another 1/8 inch at a 16th a side.
PS>>> 76-78 3671862 casting are supposed to have 2-3/16 ports!
PS>>> 76-78 3671862 casting are supposed to have 2-3/16 ports!
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Thanks! I'm wanting to get one above 2". I would love to get one in the 2.5" neighborhood, but I don't think that's happenin. The problem is the neck area under the cast in flange. It necks down well under the OD of the flange, so trying to bore the ones that are "around" 2" much over that and I think the neck area gets real thin or sees daylight. I have a good welder friend that I may turn to if I cannot find something......but I am like you. I think larger outlets are out there.
my68barracuda
Well-Known Member
RR and I exchanged PM's, even with free parts, boxing - shipping would be nuts, hopefully one closer will be located
Might be coming through your area there sometime after Thanksgiving as I am heading down through Macon (where RRR lives) and on down to Florida if there is anything left of it after this Cat 5 Storm passes through.
my68barracuda
Well-Known Member
Very nice, lets keep that in mind and PM as the time gets closer
It would be great to meet you. I think Florida is gonna be spared. Looks like it's gonna stay pretty much out to sea.......at least hopefully.
my68barracuda
Well-Known Member
Photos of the manifolds, they are both the same part number, the heater flap rotates on both manifolds, no doubt the spring will need attention.
If a pick up and delivery can be arranged, they are free as far as I am concerned.
Thank you! I will gladly take them. That last picture the top one has a bigger pipe. Makes me wonder if the outlet is bigger.
Those are nice looking manifolds, Sure would work out nice for Rusty Rat Rods performance build 6.
my68barracuda
Well-Known Member
I measured the OD of the tail pipe section remaining, went close to the welded on flange of the pipe as the remaining tip of the tail pipe was likely a bit out of round from the rescue operation.
1.980 OD on one tail pipe section
1.850 OD on the other tail pipe section
.130 difference,, but hold on,
when I stuck my finger into the tail pipe and felt the ID of the cast iron manifold, for the tail pipe with the larger OD the ID of the remaining tail pipe felt flush with the ID of the iron manifold.
When I did the same with the manifold that has the smaller OD tail pipe section, it felt like there was a step, where the ID of the cast iron manifold was larger than the
ID of the tail pipe.
I had heard of the urban legend of the larger iron manifold exit ID on Super Six cars, but have never seen it confirmed, maybe what Chrysler had done was attach a larger diameter tail pipe to the super six vehicles. Don't know, just speculating.
1.980 OD on one tail pipe section
1.850 OD on the other tail pipe section
.130 difference,, but hold on,
when I stuck my finger into the tail pipe and felt the ID of the cast iron manifold, for the tail pipe with the larger OD the ID of the remaining tail pipe felt flush with the ID of the iron manifold.
When I did the same with the manifold that has the smaller OD tail pipe section, it felt like there was a step, where the ID of the cast iron manifold was larger than the
ID of the tail pipe.
I had heard of the urban legend of the larger iron manifold exit ID on Super Six cars, but have never seen it confirmed, maybe what Chrysler had done was attach a larger diameter tail pipe to the super six vehicles. Don't know, just speculating.
pishta
I know I'm right....
That's exactly what they did, a 2.25 downpipe as opposed to 1 7/8. Manifolds different? The larger manifold was supposed to be on a truck application.
Slantsix64
Well-Known Member
Yup there are two sizes super six had the bigger diameter outlet, I have an original super six exhaust but the heat riser is no good also broken studs, I ported my stock exhaust manifold to 2.25 with the slant six exhaust gasket no that hard to do
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