SU flat top something doesn't look right
Posted 12 March 2015 - 07:34 PM
I havent even attempted to tune the carbies as I don't have a radiator so cant get the car upto temp. SoI thought I would take a look tonight get my head around the su flattop I had a flick through my 260z service manual to find all my idle and mixture screws. Nothing on the carbies relates to the book I realised the previous owner has removed all the emissions gear on them but other stuff doesn't add up
Like idle speed and mixture screws
Its a 1976 2+2 260z
Posted 12 March 2015 - 07:58 PM
Posted 12 March 2015 - 07:59 PM
Posted 12 March 2015 - 08:37 PM
Posted 12 March 2015 - 08:57 PM
Yes the flat tops on '73-on Zeds can go OK, -ish, (the correct sized ones) but the problem is that they were designed for the 70's oil crisis era & emissions & lean burn & there's not a lot one can do with them. Or get parts. So everybody bins them & fits the 240Z's round tops or British SUs, and blanks off the 260's emissions pipes & tubes. And are glad they did.
Posted 12 March 2015 - 11:35 PM
So they are better off as paper weights ?
Sell them to someone with a 4 cyl on ebay.
Posted 13 March 2015 - 07:42 AM
Posted 13 March 2015 - 10:41 AM
Looks like I will be selling these to a 4cyl datto owner and will be looking for a set of su 240z round tops. But honestly why would you go to all that effort of putting on a set of 4cyl flat tops when the car didnt even run in the first place, might as well have said sorry mate it has no carbies they where shot!!!
There is no point questioning what previous owners do, they just do these things. I've stopped questioning their motives and realised they are mostly all idiots with no clue. HAHA.
Posted 13 March 2015 - 08:29 PM
Posted 13 March 2015 - 09:17 PM
Posted 13 March 2015 - 09:41 PM
Depends, if they've been modified with bigger jets etc might work OK, they look pretty clean as if they've been professionally rebuilt, looks like someone has gone to some trouble, as normally carbs of that era are well oxidized by now whereas those have been polished.
Surely they would constantly be starving the engine of fuel
Why someone would bother with those when they could just as easily sourced some SU's with all the parts back-up available, who knows.
However, the only way to know if they're up to the job is to try them.
Posted 13 March 2015 - 10:14 PM
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