Dellorto or weber
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Dellorto or weber

  1. #1
    DEG
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    Default Dellorto or weber

    Is anyone running a set of drafts? If so what size,what motor, pics, how do you like them, I've ran them on a couple of cars and love the sound of them!! And over the years have got pretty good at tuning them, but never ran them on a boat...

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    Quote Originally Posted by DEG View Post
    Is anyone running a set of drafts? If so what size,what motor, pics, how do you like them, I've ran them on a couple of cars and love the sound of them!! And over the years have got pretty good at tuning them, but never ran them on a boat...
    I have run both on small engines, 2180 VW , Porsche, and 289 ford
    Yes they are both great set ups

    However, they were on small engines I/R set ups, The throttle bores IMHO are too small on larger engines using I/R

    On a larger motor a common open intake plate could be made for a T/R or blower

    My brother went with a injection set up with EFI to stay with I/R to gain the larger
    throttle bores
    If you ain't the lead dog the view is always the same !

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    gn7
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    Quote Originally Posted by BigSteve View Post
    I have run both on small engines, 2180 VW , Porsche, and 289 ford
    Yes they are both great set ups

    However, they were on small engines I/R set ups, The throttle bores IMHO are too small on larger engines using I/R

    On a larger motor a common open intake plate could be made for a T/R or blower

    My brother went with a injection set up with EFI to stay with I/R to gain the larger
    throttle bores
    Quote Originally Posted by BigSteve View Post
    I have run both on small engines, 2180 VW , Porsche, and 289 ford
    Yes they are both great set ups

    However, they were on small engines I/R set ups, The throttle bores I
    MHO are too small on larger engines using I/R

    On a larger motor a common open intake plate could be made for a T/R or blower

    My brother went with a injection set up with EFI to stay with I/R to gain the larger
    throttle bores
    Steve, you just needed access to larger Webers. Rudy managed to find ones large enough to fuel his Allison, when 4 Carter AFBs on a common plenum proved to little. Shelby and Ford managed to find ones to fuel a 427 well enough to dominate LeMan. If you think Rudy's access to them may have something to do with Shelby, you'd be more right than wrong.
    They flowed enough for Rudy to use 4 of the same carbs from the allison on a 10-71
    They are rare, very few were made, and you had to know somebody that knew somebody to get them, but they exist.

    But you are right, I doubt either Weber or Dellorto are making them that big today. Just no market for them today. To give you an idea how big would they need to be, 2-1250 dominators setup for IR can barely feed a 302 chevy to 8000.

    Click image for larger version. 

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    Last edited by gn7; 02-02-2013 at 02:24 PM.

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    [QUOTE=gn7;1869282]Steve, you just needed access to larger Webers. Rudy managed to find ones large enough to fuel his Allison, when 4 Carter AFBs on a common plenum proved to little. Shelby and Ford managed to find ones to fuel a 427 well enough to dominate LeMan. If you think Rudy's access to them may have something to do with Shelby, you'd be more right than wrong.
    They flowed enough for Rudy to use 4 of the same carbs from the allison on a 10-71
    They are rare, very few were made, and you had to know somebody that knew somebody to get them, but they exist.

    But you are right, I doubt either Weber or Dellorto are making them that big today. Just no market for them today. To give you an idea how big would they need to be, 2-1250 dominators setup for IR can barely feed a 302 chevy to 8000.

    Click image for larger version. 

Name:	u9.jpg 
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ID:	210570

    Here's a web link to Gene Berg
    I ran a number of his stuff
    He knows the carbs very well and has larger casting that allows bigger throttle bores, and will mount on a 48 IDA manifold base
    The Berg IDA Carb
    If you ain't the lead dog the view is always the same !

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    gn7
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    [QUOTE=BigSteve;1870234]
    Quote Originally Posted by gn7 View Post
    Steve, you just needed access to larger Webers. Rudy managed to find ones large enough to fuel his Allison, when 4 Carter AFBs on a common plenum proved to little. Shelby and Ford managed to find ones to fuel a 427 well enough to dominate LeMan. If you think Rudy's access to them may have something to do with Shelby, you'd be more right than wrong.
    They flowed enough for Rudy to use 4 of the same carbs from the allison on a 10-71
    They are rare, very few were made, and you had to know somebody that knew somebody to get them, but they exist.

    But you are right, I doubt either Weber or Dellorto are making them that big today. Just no market for them today. To give you an idea how big would they need to be, 2-1250 dominators setup for IR can barely feed a 302 chevy to 8000.

    Click image for larger version. 

Name:	u9.jpg 
Views:	626 
Size:	13.9 KB 
ID:	210570

    Here's a web link to Gene Berg
    I ran a number of his stuff
    He knows the carbs very well and has larger casting that allows bigger throttle bores, and will mount on a 48 IDA manifold base
    The Berg IDA Carb
    Not to sure how well a 58 would work dropped on a manifold sized for a 48. 10MM may not seem like much. But when you consider that 10mm is about 3/8 of an inch, and a bigger difference than 850 and a 1050 dominator, its a ton. Specially when you make it X8 barrels



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    [QUOTE=gn7;1870362]
    Quote Originally Posted by BigSteve View Post

    Not to sure how well a 58 would work dropped on a manifold sized for a 48. 10MM may not seem like much. But when you consider that 10mm is about 3/8 of an inch, and a bigger difference than 850 and a 1050 dominator, its a ton. Specially when you make it X8 barrels
    Your right,
    It fits the mounting pattern of the 48 IDA so existing manifolds and linkage will work
    but, I'am sure it requires a manifold massage to open the larger blade diameter.

    I remember seeing a inline 4 hole autolite carb picture once
    never saw it on anything, kind of like Ford answer to the Weber
    If you ain't the lead dog the view is always the same !

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    gn7
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    [QUOTE=BigSteve;1870442]
    Quote Originally Posted by gn7 View Post

    Your right,
    It fits the mounting pattern of the 48 IDA so existing manifolds and linkage will work
    but, I'am sure it requires a manifold massage to open the larger blade diameter.

    I remember seeing a inline 4 hole autolite carb picture once
    never saw it on anything, kind of like Ford answer to the Weber
    Those were built for Fords Trans Am effort and used on the Boss 302s. They made a single 4bbl manifold as well as a dual called the Cross Boss. There also a few Boss 429 manifolds cast to use them. One accelerator pump per barrel!!
    Never really proved out, and too expensive to build compared to the Holley dominator that was already beginning to prove itself. I think that Ford, who contracted Holley to develop the domintor for Nascar use, went this route for the Trans Am teams, but later dropped it in favor of the dominator.
    Not to sure how big they were, but they were always used on a plenum manifold. They were not a IR carb like a Weber.





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    I have run bother dellortos and webers. I prefer webers. 48Idas can be opened up to 58mm. Jaycee in huntington beach sells 62.5 mm carbs that are based off the old 48 idas. I remember reading a weber book awhile ago and I thought it said something about flow numbers for 48's. I think they were right in the 1000cfm-1200cfm range. That may be for the pair though. I run a set of 48 dellortos on my sandcar and they work pretty good. But nothing beats an ida.

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    gn7
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    Quote Originally Posted by SofaKingFast View Post
    But nothing beats an ida.
    Of course there is. And its way cheaper. When you get to the point you need something bigger than a 58, its time to find a different method of fueling the thing.




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    Quote Originally Posted by gn7 View Post
    Of course there is. And its way cheaper. When you get to the point you need something bigger than a 58, its time to find a different method of fueling the thing.
    Some nice pic Bob

    I really liked the Allison with Weber's
    Rudy sure built some great stuff that still has great appeal decades later

    I came across a web site that has lots of manifolds for Weber set ups and EFI stacked injection

    Wild V-8 Page
    If you ain't the lead dog the view is always the same !

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    Quote Originally Posted by BigSteve View Post
    Some nice pic Bob

    I really liked the Allison with Weber's
    Rudy sure built some great stuff that still has great appeal decades later

    I came across a web site that has lots of manifolds for Weber set ups and EFI stacked injection

    Wild V-8 Page
    Buying 6 58s would be pricey enough. But having to make 12 individual manifold adaptors for the thing could make it cost prohibitive. Luckily, Rudy's dad owned a foundry. The guy that restored it has still owns it had to make new manifold pieces again himself. Luckily he owns a foundry as well.



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    Attachment 211786
    Now that's what I'm talking about, the sound of these are amazing!! Thanks Bigsteve for the site...

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    Interestingly enough I just purchased a 429 Cobra Weber manifold for my Hallett engine. I thought I would start setting it up, looking to install 4X48 IDA's..........to replace the Weiand tunnel ram and 660's, it's a cool set up anyways!

    Any input would be greatly appreciated!

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    DEG
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    I've run these on a few smallblocks and 4 bangers.. And the throttle response is insane! But have never ran on a boat, it took me a few years to understand how to tune them but when I got it.. It's very simple..

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