Jump to content
Ultimate Subaru Message Board

Poll for carb users


 Share

Recommended Posts

1 Current Weber 32/36 DGEV

2 Works great offroad. The only difficulties I experienced were when I was still working the bugs out.

 

1 Stock Hitachi carb

2 Compared to the Weber, it didn't have as much power at any RPM. Never gave me any trouble though.

Link to comment
Share on other sites

1) What carberator are U using?

SPFIWeber.JPG

 

2) How well dose it work off road?

It don't

My Brat w/EA81 and a 32/36 Weber with some exhaust work pulls very well at low RPM.

Remember, carb is only part of the equation

for

if you put it in, you must let it out.

Link to comment
Share on other sites

Not Solex but 40DCOE weber40.JPG

 

Somebody mentioned trying twin SUs or Strombergs?

Still on my list as I have several of each.

 

Didn't Holley make down draft 2 barrel they called

"the Bug Sprayer"?

500 cfm orsumtin?

Link to comment
Share on other sites

giant parts washers! how could a 4 banger ever use a 4 barrel, will you have to solder all the jets closed? 4 barrels on a subaru has to be some sort of joke, concidering without a turbo, you can only get up to 150 hp tops. thats alot more cfm than you need.

please explain skip

Link to comment
Share on other sites

heh... if skip can run it, then it will work on a soob. lol you should know that by now..

 

my question is, how am i gonna mount a 4-barrel on my hatch? hmm..

 

although i am partial to my 32+ mpg.. me thinks with a 4-barrel i'd have my foot in it too much gettin about 12mpg, lol..

Link to comment
Share on other sites

The trick is picking one with very small primary throttle bores (like this one) The small bores allow the in coming air to move plenty fast enough through the main venturies. Jetting the mains is just the same as jetting and air correcting one big venturi.

Mike W's using a big ONE and his tip on using the larger dia. SPFI manifold helps cut down the restriction in the manifold thus allowing more air flow.

I believe the Holley I mentioned above had the two monster bores connected via a common shaft. Read both barrels open simultaneously, causing a much lower vacuum to be formed at the venturi. (It had a monster accell pump to over come this).

The secondaries open via linkage on this carb. I do not tramp on it or it would fall flat on it's face. One would have to incorporate an AVS (Air Valve Secondary) to do this or a double pumper design. Evan then your comment on engine volume requirement comes into play -large time.

With this

you have to "sneak up on" the secondaries.

Allowing the air volume the engine is requiring to be high enough

to keep the air moving through the seconday venturis high.

Jetting/air correcting them is the same. Plug cuts and testing.

Thus the comment "It Don't" Off road, as this carb would be the pits.

As for fuel econ, stay off deep jabs with the loud pedal and it's not much different than a 32/36.

Now we move into the arena of variable venturi multicarbs, SU's or the like, these were found on many "Blokemobiles" TRs, AHs, Jags ect.......

I hope to experiment with these soon.

 

 

I sure hope Al S. chimes in here.

Link to comment
Share on other sites

Weber 38/38 DGES on modified SPFI manifold on stock EA81 with free flow exhaust. Makes lots of torque down low. I still haven't corrected the jetting so it's running rich and therefor the fuel economy is currently dismal. Should be getting mpg in the low 20s when it's tuned right. This summer I'll probably put a 32/36 on the car to pass emmissions and at that point I can do a halfways scientific comparison of the two styles of Webers.

Link to comment
Share on other sites

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now
 Share

×
×
  • Create New...