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weber 38/38
- Thread starter Paul A
- Start date
sunalp
Diamond Level Sponsor
Had one on the last V6 we did. The Holley wasn't working for us as we didn't think it would fit with a riser
or at least the riser we had. Opted for the Weber. It really works well with the V6. Sat right on the manifold
with a small spacer. We were very happy with the performance!
or at least the riser we had. Opted for the Weber. It really works well with the V6. Sat right on the manifold
with a small spacer. We were very happy with the performance!
Barry
Diamond Level Sponsor
The performance of a Weber 38/38 DGES 2-barrel is NOT equal to that of a Holley 390 4-barrel. When tested at the same 1.5"-Hg vacuum level, a Weber 38/38 DGES 2-barrel will flow about 30% less CFM (about 275 versus 390) than a Holley 390 4-barrel.
Note that 275 CFM @ 1.5"-Hg vacuum is enough flow to make 150 HP which is about what a good Ford 2.8 V6 "street engine" can do.
Edited to correct typo; 4-barrel carbs are typically flow tested at 1.5"-Hg vacuum (rather than 0.5" as originally posted). 2-barrel carbs are typically flow tested at 3.0"-Hg vacuum.
Note that 275 CFM @ 1.5"-Hg vacuum is enough flow to make 150 HP which is about what a good Ford 2.8 V6 "street engine" can do.
Edited to correct typo; 4-barrel carbs are typically flow tested at 1.5"-Hg vacuum (rather than 0.5" as originally posted). 2-barrel carbs are typically flow tested at 3.0"-Hg vacuum.
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Barry
Diamond Level Sponsor
Who said anything about the DGES being a progressive carb?
The DGES has a synchronous mechanical (gear) secondary opening mechanism.
Typical automotive 2-barrel carbs are essentially the front half (2 equally sized throttle bores on a common throttle shaft) of a typical 4-barrel carb. Weber DG** 2-barrel carbs are essentially the left half of a 4-barrel carburetor and have separate throttle shafts (progressive or synchronous) for the two throttle bores which are not necessarily the same size.
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DanR
Diamond Level Sponsor
Barry, I think it was a question. I took it that way.
alpine_64
Donation Time
Yup.. Hence the question mark and not a full stop at the end of the first sentence.
I know the DGAS that's why i was asking if the ES was a progressive model like the DGVs .. Or is the S in the code for synchronous?
Barry
Diamond Level Sponsor
Noted that it was a question; I apologize for assuming (yes, I know) otherwise.
For a DGxx carb, E for the third character supposedly designates an electric choke. I have no idea what A for the third character would mean. An S for the fourth character meaning synchronous makes sense in English, but Weber model nomenclature refers to Italian words and Weber's use of letter designations is apparently neither documented nor consistent.
For a DGxx carb, E for the third character supposedly designates an electric choke. I have no idea what A for the third character would mean. An S for the fourth character meaning synchronous makes sense in English, but Weber model nomenclature refers to Italian words and Weber's use of letter designations is apparently neither documented nor consistent.