which carb are you running on your 2.25 petrol?

[albersj51]

Mine also have a single barrel weber. Where can I find a rebuilt kit for it?

Pierce manifolds has them for like $16

[Terrys]

The late Zeniths were never as good as the early original ones. The Weber 34ICH (34mm throat) is 2 mm smaller than the Zenith, and people who have heavy feet claim they don't yield the power, which is probably true. Rochesters are good when maintained. Weber 34ICH are cheap and easy to work on. My all time favorite is the Carter YC, used on M38A Jeeps I have a few that will get rebuilt some snowy winter day. I had a bunch of NOS militray surplus ones but in my enthusiasm, gave them away one by one.

[jac04]

The Weber 34ICH (34mm throat) is 2 mm smaller than the Zenith...

Terry- The 34ICH has a main venturi size of 29mm, while the Zenith is 27mm.

[Terrys]

Terry- The 34ICH has a main venturi size of 29mm, while the Zenith is 27mm.

Not an absolute measurement, but a reletive one; I set the Unisyn at a benchmark (220 cfm) and compared it to the Weber, and it dropped to just under 200 cfm. I think this is because the zenith gives a better velocity stack induction than the Weber

[jac04]

^ Interesting. I have seen other flow data (no idea how it was gathered) that states the 34ICH flows more than the Zenith:

http://www.expeditionlandrover.info/LRpartNumbers.htm#carbs

[Terrys]

^ Interesting. I have seen other flow data (no idea how it was gathered) that states the 34ICH flows more than the Zenith:
http://www.expeditionlandrover.info/...bers.htm#carbs

I wouldn't take that info to the bank.

[jimrr]

rot-chester- it's been on there for mabey 25+ years and i've never put a kit in it. prob ran 2 supertankers of gas thru it!
but after reading your posts i'd be curious what a weber could do for it.

[TeriAnn]

I wouldn't take that info to the bank.

Neither would I but it is the best info I could find. I've known Jim from decades back and I know he tries to come up with honest accurate information but I know nothing about his test conditions or the accuracy of the air flow test equipment. But I figure it is a decent ball park comparison between carbs.

If someone has different data from air flow bench testing I would like to know about it.

And don't forget that it is not all about airflow. Jetting has a lot to do with what power you can get out of a carb for a given engine.

[TeriAnn]

My all time favorite is the Carter YC, used on M38A Jeeps

The Carter has a reputation for float level problems at high angles when off road. I've heard that a lot of gonzo drivers swap them out early on.

The Holly used on the Scout I is supposed to be pretty good and good on fuel. I was happy with my Rochester for a lot of years before I swapped engines. It just worked.

I think if I were masochistic enough to still have a 2.25L petrol engine I would be exploring an EFI conversion.