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Weber 38 DGES

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M

mgtildth

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I have a '72 GT with a maniflow intake manifold, K&N's, and HIF4's. These carbs have been converted to #6(rich) metering needles. The head has been opened up a bit and port matched to the manifold. I'm not happy with the HIF4's. I get 18-20 mpg on the hwy, I should get more. My plugs are near perfect, car starts without choke, but doesn't seem to be all that rich. I'm thinking about ditching this setup and going with a weber 38 DGES. Does anyone on this board have this carb? The 32/36 DGEV are notorious for stumble, otherwise I might consider that carb. Any info on the 38 DGES, also called "The Outlaw?".

Cheers, N /ubbthreads/images/graemlins/cheers.gif
 
I would try to find out what's going on with your SU's. Personally, I think a 32/26 would be a step backwards. I run HS4's on my '70 B and I get around 25-28 MPG and have good performance too. I too run K&N's with a stock manifold and a delta 265 cam. Have your's been rebuilt recently? If they are set up properly, the HIF4's are a super match for your engine.
 
I have the 38DGES and I believe the DGV would be a step backward. In fact, the 38DGES might be a step backward too. Your SUs should be the best ones. I agree with John in that you may want to look toward other improvements.

P.S. The DGES was a BIG improvement over the DGV. I didn't have the ZS so I don't know what it was like but the DGV was supposed to be an improvement over it.
 
BTW - If you do ditch your carbs and intake set up. Sell it to me!
 
I believe the cam in the GT is a stock cam. I'm thinking that the jets in the HIF4's might need replacing. I don't think I even get 20 mpg hwy. I have a convertible with a hot cam, #6 needles on HF4's and I get very good mileage. probably 23-24 hwy. I think a sidedraft weber would be too much carb.
 
I have a '74 MGB with a 265 cam, overdrive, ported head and intake manifold. I get over 30 mpg on the interstate at 80 mph. My SUs have the original needles and have around 100k miles on them. I'm using the stock filters too.

What speeds are you driving at? Do you rev the engine to 4000+ rpms a lot?

How many miles are on your SUs?
 
Are you driving with the top up or down? A regular 4 speed will see around 25 mpg with the top up on the interstate at 70-75 mph. With the top down you will see less than 25 mpg. A stock BGT will see 25-28 mpg at those speeds. With overdrive you can kick the mileage up 5-7 mpg!
 
The draft of the carbueretor refers to the direction the air flows through the carb body itself. On DGV and DGES versions, the air comes down through the top and makes a 90 degree turn in the manifold to enter through the intake ports on the sid of the head. On carbs like the DCOE, the air flows horizontaly, sideways through the carb and directly into the intake ports on the head. The fact that the side draft versions don't have to make any extra turns is generally considered an advantage as it promotes smoother air-flow.
 
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