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Can someone tell me the difference between Weber DFV and DGV carbs? Is one better over the other for the TR7?


nick
'79 TR7

[url="http://www.webercarburetors.com/ppw/html/aplication_guide/types.htm"]This page[/url] cites the differences as follows:<font face="Arial">

The basic design of the DFV Carburetors is that of the DGV Series. but as a mirror image, with the primary and secondary barrel position reversed in the body While the throttle lever in the DFV rotetes in a clockwise motion it rotates counter clockwise in the DGV. The DFV also features a power valve circut to facilitate low vacuum running conditions-perfect for long duration, high output situations. </font id="Arial">

I can't tell you the difference between these 2 but I do have the DGV water choke version in my car. I got them from a salvaged car I got for $100. I couldn't wait to get them on and I can say that they made a <u>slight</u> improvement. BUT... I went from getting 26mpg with my ZS's to 12 to 16 (depending on my driving) with the DGV's. And yes I did install a fuel pressure regulator. I don't think the difference in performance was enough to make it worth it. Now I don't know much about tuning carbs so I'm at the mercy of my mechanic here but maybe they just aren't tuned right. I've read what info I can find about tuning them but it's greek to me.

Craig

<font face="Comic Sans MS"><font size="2">I find it puzzling that in the US there is a preference for Down draft Webers on their TRs, when the rest of us use side draft Weber DCOEs or Dellorrto DHLAs if we want to max our VE by carburation. [?]

And Trek, You should be getting much better than 12-16 MPG! You need to find a carby specialist to set the things up properly or failing that you might try an Italian car specialist, they should at least have experience with Webers, which I gather your bloke does not. </font id="size2"></font id="Comic Sans MS">

80'Triumph TR7, , 73'Land Rover (Ford 351. V8),
'89 Ford Fairlane
85'Alfa 90, 69'Ford F250.
76' Ford F100

The downdraft Webers are the big thing for MGBs here in the states, but they usually only install one. I get 19 MPG, but I know that my idle screws are set too rich, the idle is too high and from the sounds of my car when I start it in cold weather, the choke is sticking on one of them.

I am sure that if I switch to Stromburgs, I would get better gas mileage, but then I really like the way the thing runs now.






Clay

[url="http://web.mac.com/jclaythompson/Site/Welcome.html"]My Triumph Site[/url], [url="http://web.me.com/jclaythompson/Technical"]Technical Stuff[/url], [url="https://docs.google.com/?hl=en&tab=wo&authuser=0&pli=1#folders/folder.0.0B6b9tx6hnkzLYzM5MmNhYWItZjliYS00M2QzLWE1M2YtNWNlZWIzZjExZTdm"]Download Page[/url]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by jclay</i>

... the big thing for MGBs here in the states...

<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

Amazes me to see that all MGBs in the above pic are "rubber nosed".

Most here in Australia seem to be chrome bumper and I still meet ppl that are converting from rubber to chrome.

In larger car shows there are usually a zillion MGB's so they group them by year/years so rubber bumpers are often grouped together. Converting them to chrome bumpers makes them not applicable for collector plates/insurance (here) plus as far as died in wool MGB fans you're not fooling any one. That may be the situation in the picture.


TR7 Spider - 1978 Spitfire - 1976 Spitfire - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT