| [ Total Views: 889 | Total Replies: 11 | Thread Id: 93871 ] |
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 FROSTY
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| posted on November 18th, 2011 at 05:04 PM |
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Webber IDF and IDA carbs
Hi There,
I'm curious, what the difference is with IDF and IDA carbs and which is the better of the two??
Looking at a new set for christmas..!
Thanks
Jason
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Craig S
A.k.a.: Craig
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| posted on November 18th, 2011 at 05:33 PM |
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Here is the blind leading the blind...
I believe that IDFs have a better idle circuit and are therefore easier to live with every day and make more progressive power.
IDAs are more rough at lower revs, but I believe that outright they make more power than IDFs. Or more precisely, when matched with an appropriate
camshaft and lifter combo, will make more power.
Therefore for any racing (drag or circuit) where revs will remain high and idle smoothness is not important, IDAs are the best option.
There are obviously those who are more than happy to live with IDAs on a street machine however.
Whilst IDAs in of themselves may not drink more petrol, when set up with the appropriate engine components to obtain the optimum performance, they can
drink like a fish.
Let the corrections begin 
1969 Beetle - June
1974 L Bug - Gwendolyn
2002 Bora V6 4Motion - Anita
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Craig S
A.k.a.: Craig
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| posted on November 18th, 2011 at 06:36 PM |
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Try these sites for more info:
http://www.redlineweber.com/html/Types/making_the_right_choice.htm
http://www.cal-look.com/forum/cal-look-high-performance/ida-vs-idf/
http://www.thesamba.com/vw/forum/archive/index.php/o-t--t-207956--.html
1969 Beetle - June
1974 L Bug - Gwendolyn
2002 Bora V6 4Motion - Anita
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 Bizarre
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The artist formerly known as blue74l
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| posted on November 18th, 2011 at 06:49 PM |
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IDFs come in 36,40,44 and 48mm
IDAs come in 48 and 51's (??)
Generaly speaking IDA = big
Futue te ipsum!!!
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FROSTY
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| posted on November 18th, 2011 at 07:53 PM |
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Thanks for the Links!!! looks like now i just need to work out what size to get 44's or 48's
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Sides
A.k.a.: Dave Sidery
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| posted on November 18th, 2011 at 08:16 PM |
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General rule I've heard in a few places is 1600-1800, use 40's.... 1800-2000, go 44's and for 2000+ go 48's... and then go different size
venturi's to fine tune to heads, cam etc.
Whatcha been running up till now ???
VWDCQ vice pres & web dude - vwdcqinc.org.au
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snitz
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| posted on November 18th, 2011 at 08:17 PM |
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What sort of motor?...capacity etc..Im getting built a 1916cc motor built at the moment for my wifes street bug and only running a set of 40mm IDFs
with 40mm valves in her motor theres no point running 44-48mm carbies...besides losing airspeed and low down torque..speak to an engine builder I
would suggest.
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ian.mezz
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 posted on November 18th, 2011 at 08:20 PM |
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you never can have to many carbys
 
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FROSTY
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| posted on November 19th, 2011 at 07:00 AM |
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Hey Sides, I have had 40 dell's 32vents and they work fine. I am going to put them on to my 1600 street beetle and i'm wanting a new set for the
drag bug.
1776cc, engle130 cam. I want to get the biggest carb possible incase i upgrade in the future. Probabliy best to go with 44idf.
Thansk
Jason
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donn
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| posted on November 19th, 2011 at 11:17 AM |
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You won't get a bigger carb than the one in Mr. Mezz's 2nd pic above, about 600mm high I'd guestimate.
I dream of a day when a chicken can cross a road without being asked for it's motive!
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ian.mezz
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| posted on November 19th, 2011 at 02:47 PM |
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| Quote: | Originally
posted by donn
You won't get a bigger carb than the one in Mr. Mezz's 2nd pic above, about 600mm high I'd guestimate.
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they are 48s
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zayus
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| posted on November 26th, 2011 at 10:15 PM |
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Just like the the Marlboro Holden Dealer Team used, back in 1979!
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