Weber carb on 2.25 engine?

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

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.

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.

Conversion kits for SU are available from Automotive Component Remanufacturing

but they are pricey.Also there is no ideal SU needle/spring setup for a standard 2.25, youhave to compromise a bit. If you're considering spending £500 on acarb, you might as well spend another £500 and get the 9:1 head thatit 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.

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

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.

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

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

Richard