Weber carb on 2.25 engine?

Petrol, of course

What are the pros and cons of the conversion? What differences are
there -- throttle and choke control fittings, that sort of thing? Does
a "conversion kit" from one of the well-known dealers need any extra
parts?




--
David G. Bell -- SF Fan, Filker, and Punslinger.

"I am Number Two," said Penfold. "You are Number Six."

"David G. Bell" wrote:
> Petrol, of course
>
> What are the pros and cons of the conversion? What differences are
> there -- throttle and choke control fittings, that sort of thing?
> Does a "conversion kit" from one of the well-known dealers need any
> extra parts?

I have one on mine, the choke lead isn't long enough so you'll need a bracket on the centre dashboard to
fasten the new one to. It's also prone to icing. The throttle looks to be very similar.

Seems fine in normal use though.

Nige


--
Subaru WRX (The Bitch)

Series 3 Landrover 88" (Albert)

"If you tolerate this then your children will be next"

""David G. Bell"" wrote
> Petrol, of course
>
> What are the pros and cons of the conversion? What differences are
> there -- throttle and choke control fittings, that sort of thing? Does
> a "conversion kit" from one of the well-known dealers need any extra
> parts?
>
I thought I read somewhere that the SU was a lot more efficient, mpg wise,
but maybe I'm dreaming.
Not seen any conversion kits using SU's though.

--
Regards
Bob
In Runnymede, 17 miles West of London

On Fri, 18 Feb 2005 22:40:39 -0000, "Bob Hobden" <[email protected]>
wrote:

>
>""David G. Bell"" wrote
>> Petrol, of course
>>
>> What are the pros and cons of the conversion? What differences are
>> there -- throttle and choke control fittings, that sort of thing? Does
>> a "conversion kit" from one of the well-known dealers need any extra
>> parts?

Pros/cons? I've been asking that question myself and there's no
definitive answer. Fuel consumption/performance is supposed to be an
improvement on the Zenith, however they do suffer from icing and the
choke is a pain in the arse while it's warming up (reccomend fitment
of hand throttle, raise the revs off the idle jet on choke)

Choke cable is purportedly too short (I've never found a problem), the
linkage is the same as that for a Zenith 361V (needs adjustment), but
if you're converting from the solex you require a different quadrant
arrangement that is bolted onto the wing near the carb. Easily
obtainable from a Series fitted with Zenith carb.

>>
>I thought I read somewhere that the SU was a lot more efficient, mpg wise,
>but maybe I'm dreaming.
>Not seen any conversion kits using SU's though.

Conversion kits for SU are available from Automotive Component
Remanufacturing http://www.automotivecomp.com/ but they are pricey.
Also there is no ideal SU needle/spring setup for a standard 2.25, you
have to compromise a bit. If you're considering spending £500 on a
carb, you might as well spend another £500 and get the 9:1 head that
it was designed to work with.

Alex

I had a weber on my 2.25 lightweight and it was a bit better on fuel than
with a zenith but a little down on power. I changed it about a year ago for
an SU on a power products manifold and now i get better power and economy.
Mind you the kit comes with the jetting totally wrong and i put mine on a
rolling road to sort it out. Didnt bother with the cam they sell and the 4
branch exhaust they sell doesnt seem to do much. I used the original
induction hose, compressed to shorten the length and a custom mounted K&N
filter placed where the tool/jack box under the bonnet would normally be.
This is to keep the torque low down the rev range. Im lucky to have a mate
with a rolling road who is a mini fanatic so knows all about SU carbs. I
also raised the transfer ratio to get a better road speed but it can suffer
on steep hills. Mind you ive had a few defenders scratch their head as ive
gone past them at 85!

All the best

J.

On Fri, 18 Feb 2005 23:46:28 -0000, "Dave Brooks"
<[email protected]> wrote:

>I had a weber on my 2.25 lightweight and it was a bit better on fuel than
>with a zenith but a little down on power. I changed it about a year ago for
>an SU on a power products manifold and now i get better power and economy.
>Mind you the kit comes with the jetting totally wrong and i put mine on a
>rolling road to sort it out. Im lucky to have a mate
>with a rolling road who is a mini fanatic so knows all about SU carbs.

This is a problem I have discussed with ACR, they admit that they
supply the SU carb jetted for thier Stage 1 or Stage 2 9:1 heads, thus
the jetting is wrong for a standard head. Apparently the standard head
is difficult to jet for a SU as it's between two different settings. A
rolling road is the only way you're going to get it set up for the
engine in question.

Made the SU option a bit difficult, I came to the decision that it was
a lot of money to shell out for Stage 2 head and SU carb. £1000+ to
get about 30bhp more out of the enigne, I can't justify that
expenditure at the moment. Certainly the camshaft and the exhaust
manifold I cannot justify the expenditure on, given the smaller gain
of these.

Alex

So Alex was, like

> > What are the pros and cons of the conversion? What differences are
>>> there -- throttle and choke control fittings, that sort of thing?
>>> Does a "conversion kit" from one of the well-known dealers need any
>>> extra parts?
>
> Pros/cons? I've been asking that question myself and there's no
> definitive answer. Fuel consumption/performance is supposed to be an
> improvement on the Zenith, however they do suffer from icing and the
> choke is a pain in the arse while it's warming up (reccomend fitment
> of hand throttle, raise the revs off the idle jet on choke)
>
The Zenith on the SIIa was worn out and I considered a Weber, but in the end
I reckoned LR knew what they were doing and fitted a Zenith type from
Paddocks (or Craddocks, can't remember which). I think it's a pattern
rather than original, Britpart or something. Result - starts first time
every time, idles beautifully cold or hot, same power but much more
tractable in traffic, and fuel consumption up from 14mpg to over 20. I'm
happy with that. Same price as a Weber, too - about 60/70 notes IIRC.

--

Rich

Pas d'elle yeux Rhone que nous

I put a Weber (34 ICH I Think) on my series III 2286 engine. It was better
on fuel but thats probably due to the Zenith being worn and also (I think
again!) the Weber has a smaller throttle butterfly which (in theory) will
mean less power. The one I had came with a longer choke cable. I had to
purchase a fuel cutoff solenoid which screws in the side of the carb as I
couldnt stop it running on.
In the end I purchased a new solenoid and sold the Weber on eBay for £57!
Richard


""David G. Bell"" <[email protected]> wrote in message
news:[email protected]...
> Petrol, of course
>
> What are the pros and cons of the conversion? What differences are
> there -- throttle and choke control fittings, that sort of thing? Does
> a "conversion kit" from one of the well-known dealers need any extra
> parts?
>
>
>
>
> --
> David G. Bell -- SF Fan, Filker, and Punslinger.
>
> "I am Number Two," said Penfold. "You are Number Six."

missed a bit there!
meant to say I purchased a new Zenith and sold the weber

Richard


"Richard" <richardsemail [email protected]> wrote in message
news:[email protected]...
>I put a Weber (34 ICH I Think) on my series III 2286 engine. It was better
>on fuel but thats probably due to the Zenith being worn and also (I think
>again!) the Weber has a smaller throttle butterfly which (in theory) will
>mean less power. The one I had came with a longer choke cable. I had to
>purchase a fuel cutoff solenoid which screws in the side of the carb as I
>couldnt stop it running on.
> In the end I purchased a new solenoid and sold the Weber on eBay for £57!
> Richard
>
>
> ""David G. Bell"" <[email protected]> wrote in message
> news:[email protected]...
>> Petrol, of course
>>
>> What are the pros and cons of the conversion? What differences are
>> there -- throttle and choke control fittings, that sort of thing? Does
>> a "conversion kit" from one of the well-known dealers need any extra
>> parts?
>>
>>
>>
>>
>> --
>> David G. Bell -- SF Fan, Filker, and Punslinger.
>>
>> "I am Number Two," said Penfold. "You are Number Six."
>
>