as is says above would this be suitable for a 4k I'm building? going to freshen up the 4k iv got in the garage, clean the head up and put a decent cam and exhaust on it?

I'm a panel beater not a mechanic so dnt know to much bout webers and so on

any help would b most apreciated thanks

 

Sorry had too,

But have a search, youll find there was a few recent topics about this,

 

Cheers and welcome ;) :lolcry:

It's probably a little on the large side, but it should do OK. People seem to get away with 32/36 webers, so why not!

 

I think you can choke it down to 34mm, you wouldn't want to go larger than this unless it's truly a race motor. I'd also look into porting unless you've already got a big port head or similar. If you're putting it on say a 3K head with the tiny ports (25mm) it'd probably be a bit of a dog.

People have run 40s before, I think a 45 is a bit big. (Unless you are needing to supply a

great deal more fuel than most 4ks require.)

I have twin 40's on a 4k and once i got them tuned and jetted properly it ran like a champ

 

So a single 45 should be ok as long as you do the cam and extractors and possibly some headwork aswell should run sweet - Just remember to get it jetted properly or you'll have to clean your plugs just about everytime you drive it :lolcry: