Hey people,

I've been having some ongoing issues with the zed (1975 260Z with twin SU HS-6 setup) and cant seem to pin this down.

Car will idle very nicely at around 800rpm but will have stuff all power until under load at 1500-2000 and may even backfire once.

first thing I have done is check out the performance of the carbs, at the moment the rear carb is acting lean (spluttering and failing engine when piston lifted) but exhaust smells rich.

I have...

Cleaned the filter in the vacuum pot
Changed all the fuel and vacuum hoses
Changed the fuel filter (and thrown out the crappy little one in the pump)
Checked vacuum pump
Sworn, cursed and threatened

What am i missing...Certainly seems like a vacuum problem to me

 

Have you synced your carbs with a unisyn? they may be badly out of sync. or in need of a rebuild.

 

Sorry yes I should have mentioned that I have tuned the carbs...

might have to rebuild though I did notice some piston slop in the back one.

 

rebuild time!

 

why are you excieted aboot that? lol. should be a learnin experience. luckly you can remove carbs on these cars easy as hell... dont know how the rebuild goes but hte kits are cheap... so shouldnt be to bad.

 

who's excited?!

 

you lol. im just kidding.. but you are excited ehem if i may


quote " REBUILD TIME!!!!!" thats excited right there

 

Hes got a point there...that was a little excited.

I have been meaning to get to my local SU guru for a tour around his shop etc. I think I will do that this week and ask his opinion...probably rebuild time

Anyway the elec dist will arrive this week so that will help too.

Im going to get rid of that horrible hose to the top of the valve cover and put a breather filter on it...Where the hell does that go?

 

speaking of which, I need to sell mine. How much did you buy yours for?

 

the car, the dist or the su's?

 

Anyone near their 260 at the moment? I want to know the size of that hose connection on top of the valve cover

 

what are you talking aboot? i have 260 only 20 ft away from me but im not sure what your takling about. you mean the nipple on the valve cover you plug to the intake or can put an oil breather on or what?

 

yah that one...too late right? damn work getting in the way of my Zed

 

hmm.. i have no clue what size it is.. lol.. if i had to guess id go with a 1/4 inch maybe a 1/2..... i dotn really want to measuer.... dont you ahve yours? or did you like want to stop on your way homeor soemthing.. im confused

 

Yeah I stopped at the auto shop on the way home but thats ok, Ill get one another time. The main issue that I had was when I went to use the crank pulley nut to turn the engine...ITS LOOSE! its supposed to have 100ft/lbs!

 

gee--coollie----i hope that fixes it-----but, ya know--that little noise i heard was not really so excited-----:


E X C I T E D


that's excited........i hope yiou do not have to rebuild anything now........and give Binky a pat from me, ok??.........

 

The pulley was still on tight but man its scary...I dont have a socket that big, gotta go to the hardware place and get a 1/2 inch set.

Having nightmares about pulleys and belts flying everywhere.

 

Ok, binky's issues are sorted! he is 100% and happy. Aircon, suspension and seats and hes my daily driver