Zenith vs. Weber

[panos]

I have a 73 series III with a zenith carb. I am pretty sure it is shot since I have dismantled and cleaned it several times. The float is set correctly, etc. I finally got her running (roughly) and found out the idle mixture screw did nothing whether screwed in or out. I tried cleaning it one more and now it won't even idle. Should I just go for a Weber rather than continue to mess around with it. What are the pro's and con's with a Weber.
By the way, I found a 34ICH Weber for 160 at weberdirect. What to do?

[Clive]

I have had both. No real cons to the Weber that I am aware of although apparently it has a tendency to run lean and needs the mixture adjusted accordingly. Zeniths have a reputation for deforming and leaking, and I have had bad experience with a new Zenith recently. I was told that Zeniths are now manufactured somewhere in India, and the quality control which was never good is even worse now....may be so, or not. Regardless my 0.02 of experience is for the Weber!

[TeriAnn]

I have a 73 series III with a zenith carb. I am pretty sure it is shot since

What are the pro's and con's with a Weber.
By the way, I found a 34ICH Weber for 160 at weberdirect. What to do?

I suggest one of the following:
- a New Zenith,

- a Rochester B series from '50-'53 216 cubic inch Chevy truck six cyl engine,

- or a Holley 1904, number R-2494A, used on '60-'64 Scout.

The Weber is a universal replacement carb frequently used on 15-1600 cc size engines. It achieves its reputation for good fuel mileage because the venturi is smaller than carbs used for 2.25L engines and that they usually come jetted out of the box for the smaller engines. Also, the main jet sits at the bottom of the fuel chamber so is more easily clogged by fuel contaminants.

A Zenith will give you more power, esp at high revs, than the small venturi Weber would provide. The Zenith warp was fixed a couple years ago by the factory.

The Rochester is better at highway RPMs then the Zenith when it is properly jetted and the Holley usually provides the best fuel mileage but is hardest to find.

[yorker]

A Zenith can usually be sorted out, I'd try the various zenith fixes and a rebuild before I'd plunk down $160 on a Weber. I had a single barrel Weber and was not impresed with it, it was ok but lean. If you get one make sure it is jetted properly for the 2.25. Also consider a Rochester or Holley (model 1904?)

[singingcamel]

sounds to me like the Zenith warp syndrome, the base is warped.
go to the web site @britishpacific or britpac .com ,they have a article on that and how to fix.
i have been running a weber on my 109 for 19 years, no problems or regrets.
i have a bunch of rochesters for those who like them..
www.singingcamel.com

[JimCT]

This is the carb.....use with the Pierce manifold.

http://www.webernorthamerica.com/32_36_DFEV_Weber_Carb.html

[jp-]

http://www.webernorthamerica.com/32_...eber_Carb.html

Actually,

This is the carb setup that I like to run on my 2.25:

http://www.alsblowers.com/sc520d_6_sm.jpg

The two barrel weber, just doesn't give me enough pickup on the 2.25.


-John

[Jazzop]

Anybody out there running SU carbs? I once saw a guy with twin HD8s, but I don't see why a single HD8 wouldn't do the trick.

[yorker]

Kevin NY has an SU or 2 on his 2.25. Maybe he'll post here??

[TeriAnn]

Anybody out there running SU carbs? I once saw a guy with twin HD8s, but I don't see why a single HD8 wouldn't do the trick.

Twin SUs would not work on a LHD 2.25 engine because the steering box and rear carb would try to occupy the same space. There is a company in the UK that offers (ed?) a 2.25 intake manifold for a single SU.

However if you have a RHD LR or a LHD LR with the steering box in a non stock location, then a dual conversion is possible and possibly reasonably easy.

The Triumph TR3 and TR4 intake ports are a fairly close match to the LR 2.25 intake ports. I just happened to have the intake manifolds off both my cars at the same time in 1991 and checked.

Some of the mounting bolts are close enough to use but new mounting holes would need to be added to the head. The TR4 engine is 2.2L, so stock SU or Solex carbs with stock TR4 needles will likely work just fine.

ALternativly, using TWM intake manifold for the Triumph engine it should be relativly easy to fit a pair of Weber DCOE side draft carbs to the LR 2.25L engine

[Eric W S]

ACR is the company that makes the single SU carb/manifold for the series.

http://www.automotivecomp.com/landrover_perf.html

Middle of the page.

EwS

[KevinNY]

I have the ACR setup. Never touched it, it works beautifully at all angles. The carb is an HS6.

[JimCT]

Progressive carb lag

Actually,

This is the carb setup that I like to run on my 2.25:

http://www.alsblowers.com/sc520d_6_sm.jpg

The two barrel weber, just doesn't give me enough pickup on the 2.25.


-John

The progressive Weber carbs almost always have a bit of lag as the secondary opens. The non-progressive carb solves that problem and it flows a bit more too.