Anyone Know Anything About The Weber 40 Dfav

[Guest Kieran]

Anyone??

 

Kieran

[Guest Kieran]

Hello??

 

Is there a preference between a 38 dgas and a 40 dfav??

 

Please.....

 

Kieran

[Guest madmax]

kieran

I have a good haynes carb manual covering all popular applications but your carb isnt listed at all.

 

Colin

[Guest madmax]

Kieran

Isit off a ford 2.8 capri ?

 

Colin

[Guest Kieran]

Dunno what its off, just been offered one at a good price!

 

Kieran

[ibrooks]

One car it was fitted to was the Reliant Scimitar (early Essex V6 engined cars). Dunno why they changed but it was replaced with the DGAS. Looking at the Scimitar manual it doesn't look much different to the DGAS but more I couldn't tell you.

 

Iain

[Guest Kieran]

I phoned WEBCOM, and apparently it was fitted to the essex V6 upto 1972. It does have simultaneous opening chokes of 40mm.

 

That'll be sold then!

 

Kieran

[Guest elgey7]

Kieran

I got hold of one of these DFAV's second hand.

Being 40 it should be as good if not better than a 38 DGAS.

Both chokes open at the same time.

I got a service kit from Gower & Lee, some new jets & some good advice.

The guy there was very helpfull & agreed it should be as good as if not better

than a DGAS. However, I could not get it to run right at all.

It would not pike up. I fully stripped it again, cleaned & checked it all.

But I couldn't get it right. It had two 1mm holes drilled in the throttle butterflies which i don't think were original but i don't know?

In the end I gave up & refurbished a DGAS which is a good carb & goes well.

I would still like to know why that DFAV would not work well. I may go back to it some day as it's sitting there all polished & smiling at me every time I go into

the garage.

 

You can get some info from Gower & Lee's web site.

 

Regards

Colin

[Guest salty_monk]

I believe they were used on the Ferrari 308's (6 of them I think..)

John Walton has one on his Tiger & knows a little about them i think...

[Guest madmax]

The reason the holes are drilled in the flaps are to try to make the engine idle better as is the practice with 40 dcoe carbs. I had been advised that this carb was to big for a pinto unless running a realy wicked cam with big valves. I read in an article that it was hard to obtain a good air velocity over the venturies and this made the engine lumpy and slow to pick up.

 

The other carb to avoid is the solex pierberg equivelent to the weber dgas as fitted to v6 granadas it works but you cannot change the air correction jets to fine tune the engine. It leaves a bigger unburnt fuel trail than a jumbo jet, ask Big Jim?

 

Colin

[Guest elgey7]

Colin

Thanks for the info on the DFAV.

Why would they drill holes in the flaps ?

Is that not exactly what the idle screws are for ?

 

Regards

Colin