mkben.21
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| posted on 7/7/10 at 10:26 PM |
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"new to me" dgav carb
Hello Again,
Following my last post i decided to run the weber dgav without a choke mech on the side and it fits a treat. Then however i came across the problem of
the linkage. i couldn't find any for that carb on the internet or at my local scrappies so i had to build one. Very pleased with it actually. So
its on a running now only problem is its not running as good as it should. i dont really wont to give it to a garage and pay them to set it all all up
just yet as it might take a couple of hours so can anyone give me some pointers in the right direction to tuning these carbs? atm it seems as though
its over fueling because you put your foot down and it doesn't pick up like it use to. alot of flameidge is occuring out the exhaust when on the
over run aswell does that indicate rich mixture or air leak in exhaust system? Last thing!; the thing that screws into the bottom of the manifold has
three pipes connected and one is going nowhere can that just be blanked off or should that really be attached to something important?
Thank you for all the your help in the last topic aswell,
Ben
[Edited on 7/7/10 by mkben.21]
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atspeed racing
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| posted on 8/7/10 at 07:03 AM |
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It doesnt cost a fortune to recalibrate the DGAV/DGAS so why mess around. Your car will run better, use less fuel and be spot on if it was set up on a
rolling road.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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BenB
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| posted on 8/7/10 at 09:16 AM |
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If you're trying to do some basic tuning on the cheap a colortune is a good place to start. Cheap and (in my experience) quite effective.
It'll at least tell you if you're running rich or lean (both of which can cause back-firing out of the exhausts).....
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pewe
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| posted on 8/7/10 at 10:13 AM |
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Could be a combination of jets and chokes - difficult to say but
if you ring Northampton Motorsport they have always proved very helpful over the phone and will supply you with the necessary parts to make it run
better.
As others ^^ have said though nothing like having it set up properly.
HTH.
Cheers, Pewe 
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David Jenkins
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| posted on 8/7/10 at 11:15 AM |
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The good thing about DGV carbs is that most of the 'adjustments' are fixed and stay in tune. The same reasons make it tough for home
tuners as there's little scope for tweaking - you need a box of different-sized emulsion tubes, jets and venturis to play with.
The advantage of a professional tuner is that he will have all those things to hand, and a fair idea about using them!
[Edited on 8/7/10 by David Jenkins]
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