carby problems /new Z owner
Posted 27 September 2006 - 04:31 PM
Posted 27 September 2006 - 05:10 PM
I've been told that genuine SU carbs are better than the OEM Hitachi copies that Z's came with, but i've never had a genuine one so can't comment. Do you have the 'flat-top' or 'roundtop' style Hitachis, as the flat-tops are apparently crap (there's plenty of discussion on these elsewhere). My 240 has the round-tops and although i've spent some time adjusting and testing them, I find they are adequate for my needs.
Getting spare bits for genuine SU's might be easier, so I guess one thing to look at is the condition both sets of carbs are in.
Posted 27 September 2006 - 05:37 PM
Posted 27 September 2006 - 07:54 PM
I noticed the carbys on that were round tops so I figured they were 240z carbys, which was a bonus as the standard carbys for that 260z motor where flat tops. Now that I go back and look at the e-bay picture again I can see the float chamber is different to the Hitachi SU's.
So as the others said, if you have flat tops on your car throw them in the bin and put on the genuine SU's. If you have round tops, the "tuner" has stuffed it up as those carbys should run perfectly. Take it back and complain.
Posted 27 September 2006 - 08:25 PM
Posted 27 September 2006 - 09:03 PM
Thanks guys for your input. What carbs are you guys running? i spoke to a z mechanic this arvo who said the 240z (i think he said Bosch) carbs are the best because they are so simple? it's a little confusing to know what to do and which 'professional mechanic' to believe.
For an L24/L26/L28, 240Z Hitachi carbs are the best all round choice as they are well known in terms of tuning, etc and a good match to those engines (as long as the carbs are properly setup and in good nick). The Hitachi's are a copy of the British SU as already indicated. The carbs on the L26 engine are probably from a Jag or similar and are 'genuine' SU's. They can be made to work just as well as the 240Z carb, although needle selection can be a bit more involved.
Sound like the mechanic didn't have much of a clue. Steve Newing in Mitcham knows his stuff (but ain't cheap) and then there's possibly Lou Mondello (Moorabbin) although he mainly specialises in Datsun Fairlady roadsters, although I know he has worked on Z's. Someone will also suggest Warren at Zworx.
Posted 28 September 2006 - 09:02 AM
Posted 28 September 2006 - 11:39 AM
Just as a heads up the first rule is don't trust any mechanic.
While I generally agree with the sentiment, for those with less mechanical experience it's not so simple and unfortunately relying on forum advice can be a bit of a minefield - some might be offended by that, but it is a fact. My cars and motorcycles have never seen the inside of mechanics workshop, except for things like RWC and dyno tuning, but I've also have many years of self-taught experience on cars an motorcycles inc building race engines, etc.
Posted 28 September 2006 - 05:41 PM
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