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-   -   Weber 38 DGAS (https://forums.tbforums.com/showthread.php?t=348999)

jfry 05-01-2019 07:18 PM

Weber 38 DGAS
 
An ol timey Volvo mechanic is trying to convince me that my SU's are going to give me problems eventually due to today's modern gas. He recommends I use a Weber 38. Anyone familiar with this carburetor? I've used the progressive Weber that everyone hates but never the 38. Going on the Volvo Jeep so I can't afford any trouble out in the wilderness. Thanks

dl242gt 05-01-2019 07:51 PM

The 38 DGAS is the synchonus 2 barrel that John V recommends.

You aren't going to have problems with your SU carbs from the modern gas if you set the float bowls, set the balance and mixture. What wears fast on SU carbs are the throttle shafts. If yours are good then you are ok with properly tuned carbs. If not then it's a question of which path to take. A replacement carb and manifold which may require some fabrication or rebuild/replace your SU carbs.

Another carb option to replace the SU is a Mikuni carb. I don't know much about them. But two of those woud probably give you the period look with a well made carb. Mikuni carbs are known to be high quality.

jfry 05-01-2019 08:05 PM

My SU Hif 6 carbs are rebuilt but require fabrication for a throttle cable bracket. I'll have to run a bracket off the firewall which I'd like to avoid because all of my wiring is on the firewall. I have a Weber manifold already and I know the throttle cable bracket on the Weber comes off the carb itself or the manifold making things easier. Elevation change is also an issue which my old progressive Weber never reacted too but I'm concerned the SU's might.

culberro 05-01-2019 08:57 PM

What size motor is this going on?

jfry 05-01-2019 09:02 PM

Rebuilt B20, .030 over, Dcam

culberro 05-01-2019 09:08 PM

Quote:

Originally Posted by jfry (Post 5946201)
Rebuilt B20, .030 over, Dcam

Seems a bit excessive for a wheeling rig with an engine that size.

NotSoFresh 05-01-2019 09:41 PM

I have over 25,000 kms on a rebuilt hif6 on a b21a and have had zero problems.

jfry 05-01-2019 09:49 PM

Quote:

Originally Posted by culberro (Post 5946209)
Seems a bit excessive for a wheeling rig with an engine that size.

Probably true but it is a " high speed assault vehicle". It's geared so low you can really getting going on the logging roads here.

vwbusman66 05-02-2019 10:58 AM

HIF's are the second most reliable carb IMO, the first being the HS's only because of the nature of the float bowl sealing method.
The square profile o ring is a little more susceptible to drying out/rotting than a paper gasket.

jfry 05-02-2019 11:31 AM

Quote:

Originally Posted by Redwood Chair (Post 5946441)
:shh:

Let him waste his money chasing the dragon.

I have a dgas on the shelf in stock cause I spent five years at the jy's beating you to the punch on every RWD car

Redwood Chair 05-02-2019 11:36 AM

Megasquirt it.

jfry 05-02-2019 11:54 AM

It's not about wanting more power. It's about the fact that when the fire burned down Paradise six months ago our local SU master lost his house and shop. Not a lot of old timers, like you, who know how to work on SUs anymore.

Jack 05-02-2019 12:01 PM

Quote:

Originally Posted by jfry (Post 5946479)
It's not about wanting more power. It's about the fact that when the fire burned down Paradise six months ago our local SU master lost his house and shop. Not a lot of old timers, like you, who know how to work on SUs anymore.

Itís like you never heard of Hiperformance

5k miles later my su give me no issues. Only you have to actually adjust them after the rebuild but thatís it compared to the Weber

I doubt youíll put 5k miles on your Vlap in the next 10 years

Donít waste your $$

jfry 05-02-2019 12:10 PM

Hiperformance rebuilt my hif6's. Local SU master is gone. Your guy Steve said he's not very good with them. Only thing that's going to cost is having custom brackets built for the SU linkage. I had a bracket built last year but it was attached to the rear head bolt and I don't want to do that again. Weber offers a lot more options when it comes to linkage.

matt b 05-02-2019 12:10 PM

I hated my 38 when I had it on my first Amazon. Robs you of power, there's no reliability gain and it looks like a turd sitting in your engine bay. As Jack said: send your SU's to Ian and Eric and call it done.

Sidedraft Webers are amazing. Downdraft Webers are dreadful.

jfry 05-02-2019 12:41 PM

Quote:

Originally Posted by Jack (Post 5946483)
Itís like you never heard of Hiperformance

5k miles later my su give me no issues. Only you have to actually adjust them after the rebuild but thatís it compared to the Weber

I doubt youíll put 5k miles on your Vlap in the next 10 years

Donít waste your $$

Wish you guys would read. Its not about miles. Its about the vehicle sitting and today's gas effecting the SU's. Steve says your good at them!

vwbusman66 05-02-2019 12:48 PM

Quote:

Originally Posted by matt b (Post 5946493)
I hated my 38 when I had it on my first Amazon. Robs you of power, there's no reliability gain and it looks like a turd sitting in your engine bay. As Jack said: send your SU's to Ian and Eric and call it done.

Sidedraft Webers are amazing. Downdraft Webers are dreadful.

Or send the HIF's to Tom Bryant and call it done.

Jack 05-02-2019 01:29 PM

Quote:

Originally Posted by jfry (Post 5946509)
Wish you guys would read. Its not about miles. Its about the vehicle sitting and today's gas effecting the SU's. Steve says your good at them!

you should be adding fuel stabilizer to your rig regardless

I know nothing

John V, outside agitator 05-02-2019 01:39 PM

Quote:

Originally Posted by matt b (Post 5946493)
I hated my 38 when I had it on my first Amazon.

Sidedraft Webers are amazing. Downdraft Webers are dreadful.

Millions upon millions of people driving billions of miles for decades with downdraft DG family Webers disagree with your single, isolated opinion.

Maybe you didn't do it right.

superboosted 05-02-2019 02:05 PM

Quote:

Originally Posted by vwbusman66 (Post 5946512)
Or send the HIF's to Tom Bryant and call it done.

where mine went... good stuff :)

Webers are a band aid fix and really the hideous look ruins it for me from go.:lol:

Jack 05-02-2019 04:25 PM

Downdraft Webers rattle apart on volvo pushrods

matt b 05-02-2019 05:34 PM

Quote:

Originally Posted by John V, outside agitator (Post 5946530)
Millions upon millions of people driving billions of miles for decades with downdraft DG family Webers disagree with your single, isolated opinion.

Maybe you didn't do it right.

As easy as it would be for me to take your bait, I find this to be another one of your idiotic posts.

If the OP is worried about fuel sitting in his carbs and damaging the components, he has alternatives. Fuel additives, better quality gas, etc...

jfry 05-02-2019 05:50 PM

I use star Tron in vehicles that sit for the winter. You guys have no idea how crappy California gas is. We get the worst gas in the country.

vwbusman66 05-02-2019 05:58 PM

Quote:

Originally Posted by jfry (Post 5946656)
I use star Tron in vehicles that sit for the winter. You guys have no idea how crappy California gas is. We get the worst gas in the country.

How much ethanol is standardized there? In WV and MD, we have ~10% ethanol which isn't horrid and stores OK.

matt b 05-02-2019 06:04 PM

Quote:

Originally Posted by jfry (Post 5946656)
I use star Tron in vehicles that sit for the winter. You guys have no idea how crappy California gas is. We get the worst gas in the country.

AZ gets the same gas, it's truly awful except we don't have the east coast ethanol mixes, etc... Those will absolutely wreck havoc on a carb.

Honestly, I can let a car sit for 30-45 days at a time and the carbs don't get gummed up. Throw some 91from a reputable gas station in the tank and it should be just fine.

38's give you a certain peace of mind since it's only 1 carb but it's still a carb so you're still stuck with the same issues as an SU for example.


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