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75duster
 Post subject: weber manifold heat
PostPosted: Mon Feb 22, 2010 11:21 pm 
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hi all i recently aquired a clifford triple weber manifold and was wondering if not having heat is a big driveability issue with them? if i had to i could fashion a plate between the carbs and manifold with coolant going through it but i would think with the runners as short as they are its not a big issue. any thoughts? also are these manifolds decent castings? i plan on painting it or having it powdercoated but thought id ask around. i didnt get carbs with is, so i will more than likely have several questions and headaches when it comes time to put it on.

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Wesola78
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PostPosted: Tue Feb 23, 2010 8:11 pm 
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Hello,
I'm not an expert on this, but I am told that the lack of intake manifold heat can cause low speed driveability issues. Right now, I have an Offy intake with a Weber 2bbl carb. The exhaust manifold that I'm using has no intake heat. It does take my car longer to warm up in colder weather.
I'm also told that the lack of intake heat can cause your engine to be less fuel efficient. However, if your gonna use three carbs, I'm guessing that you're not real concerned with fuel economy.
Have fun!

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KLJohnson
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PostPosted: Wed Feb 24, 2010 12:01 am 
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http://www.thetruthaboutcars.com/editor ... duster-cc/

Skip down to jpcavanaugh's comments on the Duster/Valiant. Damp foggy weather is what you'll need to be wary of and their car still had carb heat. Drivng up in the mountains where weather can be markedly different fairly quickly should make you cautious too.

I know it is a pain in the butt, however you might want to fabricate an air box that you could at least switch on warm air heated by the exhaust manifold when you wanted to. Years back I snagged a Datsun 240Z air box (I believe) in order to do this with a dual DCOE setup. Still a project in waiting.

Good luck.
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75duster
 Post subject:
PostPosted: Wed Feb 24, 2010 10:53 pm 
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well i was hoping someone that actually has a running setup would chime in

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65 dartman
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PostPosted: Thu Feb 25, 2010 5:44 am 
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I just acquired a matched set of DCOE's for my triple Weber intake, but am a long way from installation and real world testing.

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75duster
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PostPosted: Thu Feb 25, 2010 5:51 pm 
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thanks, what are you doing for an exhaust?

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65 dartman
 Post subject:
PostPosted: Thu Feb 25, 2010 7:39 pm 
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Quote:
thanks, what are you doing for an exhaust?
I have a set of 3 into 2 into 1 shorty headers which I think would be perfect for the triple Weber set-up. Re: intake manifold heat - years ago I was running a Clifford 4 barrel with a set of long tubes headers on my 65 GT. This was on a daily driver in VA where the temps get down into the low 20s (and sometimes lower) at night during the coldest part of winter. No manifold heat whatsoever. 2 pumps on the 4 barrel it started right up and settled into a decent idle. Let it warm up a minute or two and drive off. Hopefully it'll be similar, but ya never know.

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ceej
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PostPosted: Thu Feb 25, 2010 8:06 pm 
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I'd think driveability would be very similar to Fopar's Six Pack to Go. He runs six motorcycle carbs with headers.

Perhaps he'll chime in. He daily drives the dart.

CJ

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Wesola78
 Post subject:
PostPosted: Fri Feb 26, 2010 10:55 am 
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Whoa! Six motorcycle carbs with headers? I'd like to see that. 8)

In my opinion, since it sounds like performance is your goal, run your setup without manifold heat and see how it does. Cold weather driveability might not be an issue for you.

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robertob
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PostPosted: Fri Feb 26, 2010 10:56 am 
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Also with one barrel per port mixture stength and distribution is not such a big deal as with a downdraft carb. Air/fuel doesnt' have to do a 90 degree turn and has less chance to lose the fuel to cold manifold walls.
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Fopar
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PostPosted: Fri Feb 26, 2010 11:56 am 
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Here is my setup '63 Dart GT

Image

Built the manifold using flanges sold on E-Bay, Ceej helped make the plate to hold tubes in place the rest is built using exhaust tubing and mandrel bent sections of exhaust tubing. all gas welded.


Post subject: (Thu Jun 04, 2009 10:30 pm)


--------------------------------------------------------------------------------

When I got home and checked milage, filled tank in Redding and had just over 1/4 tank showing on gauge when I got home (looks like it has a 18 gallon tank). It took 15.42 gallons to refill and 339 miles, so if you do the math, thats 21.98 miles per gallon. It does have 2.8's in the rear with 205/70 X 15's.

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ceej
 Post subject:
PostPosted: Fri Feb 26, 2010 2:49 pm 
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I run an Offy with a down draft setup. Once the engine is warmed up, it's not an issue. As robertob suggested, you should have less of a problem than I do with the short runners and minimal plenum floor to condense fuel on.

CJ

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Wesola78
 Post subject:
PostPosted: Fri Feb 26, 2010 6:17 pm 
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Turbo EFI
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Quote:
Here is my setup '63 Dart GT

Image

Built the manifold using flanges sold on E-Bay, Ceej helped make the plate to hold tubes in place the rest is built using exhaust tubing and mandrel bent sections of exhaust tubing. all gas welded.


Post subject: (Thu Jun 04, 2009 10:30 pm)

Nice! :twisted:

--------------------------------------------------------------------------------

When I got home and checked milage, filled tank in Redding and had just over 1/4 tank showing on gauge when I got home (looks like it has a 18 gallon tank). It took 15.42 gallons to refill and 339 miles, so if you do the math, thats 21.98 miles per gallon. It does have 2.8's in the rear with 205/70 X 15's.

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'78 Volare 225
'67 Charger 318
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75duster
 Post subject:
PostPosted: Sat Feb 27, 2010 11:29 am 
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thanks all. fopar- how hard was it to sync those up to each other?

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Fopar
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PostPosted: Sat Feb 27, 2010 12:02 pm 
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Not real hard, just takes time to get them all to be opening at the same time and closed down the same amount. But have done it way back in 1958 with a tripple two on a chev (no progresive linkage) but by now you have figured out I am not a Kid. I will be 71 this year :D :lol:

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