1971ke20SL Posted June 19, 2008 Report Share Posted June 19, 2008 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 Quote Link to comment Share on other sites More sharing options...
Falken_KE30 Posted June 19, 2008 Report Share Posted June 19, 2008 Sorry had too, But have a search, youll find there was a few recent topics about this, Cheers and welcome ;) :lolcry: Quote Link to comment Share on other sites More sharing options...
snot35 Posted June 20, 2008 Report Share Posted June 20, 2008 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. Quote Link to comment Share on other sites More sharing options...
Doogs Posted June 21, 2008 Report Share Posted June 21, 2008 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.) Quote Link to comment Share on other sites More sharing options...
KE ping it real Posted June 21, 2008 Report Share Posted June 21, 2008 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: Quote Link to comment Share on other sites More sharing options...
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