Hey everyone. I've got a question regarding carbies

1) What size are the carbies out of a Zed (the twin carby version. Are they SU's?)?
2) Can you fit 2 of them onto a 4 cylinder L series?
3) What other parts do you need?
4) Is it worth while?

Thanks.

_________________
END TRANSMISSION

Freak,
1. 240Z carbs are 1" 3/4. They would be too big for your L4.
2. Not without a lot of f*cking about.
3. The whole assembly - linkages & carbs.
4. No it is not. Good 240Z SU's are worth $$$.

_________________
Classic Auto Fabrications:
http://www.ozdat.com/forum/viewtopic.php?f=38&t=31659

http://www.lescollinsracing.com/

Ok then,

Why are they too big? Lots of people run 45mm Webers...

What about 1 3/4 inch Hitachi's then? Are there any 4 cylinder L series manifolds for them?
Can a stock twin SU manifold be modified to fit the 1 3/4 inch Hitachi's?

_________________
END TRANSMISSION

The zed carbs are Hitachi. However, they are a different pattern where they bolt onto the manifold so you would most likely need to make / modify a manifold to suit.

I still have a set of zed carbs in the shed that I got years ago to try and fit on an L4, before deciding it was all too difficult for the potential benefits.

_________________
1970 ex Group A Rally P510
1971 P510
1972 180B SSS
1965 SP310 Fairlady
1966 SP311 Fairlady

Hmmm. That sucks.

So where do you find 1 3/4" SU's for a 4 cylinder L series? Do these bolt onto a stock twin SU manifold for a L-18?

Or is it cheaper to buy 45mm Webers

_________________
END TRANSMISSION

I have a pair of 180B 610 SSS Twin SU's with manifold for anybody intrested, they were running on car years ago' but taken off due to Dellorto upgrade, They even come with the Original Air Filter box How much you pay???

If you're really keen

http://shop.sumidel.com/

_________________
1970 ex Group A Rally P510
1971 P510
1972 180B SSS
1965 SP310 Fairlady
1966 SP311 Fairlady

That's insane.

I swear i read on here somewhere that somebody had 1 3/4 SU's on their L-18...

_________________
END TRANSMISSION

the 38mm hitachi was first fitted to the L16 as a L20B is 25% larger in capacity its obvious you need larger carbs to maintain the air flow.
The 44mm SU is the right size for a 2 litre.
We have done a few conversions using NEW english SUs.
Jets & needles are easy to obtain.
They fit with minimal work.
Porting the original SU mani is the major part of the conv.
Sounds like webers under the bonnet.

_________________
A little knowledge is a dangerous thing.
www.datsport.com

"R.I.P. Baz. 29 April 2022. Thank you for all your contributions to the Datsun community over the years. You will be missed." - OZDAT

*cough* quad throttle bodies *cough*

No way is a weber setup going to be cheaper than SU's to get running. But if you require someone to tune them all the time (I dunno about others but I could never get my SU's right!) then its going to cost u more in the long run. Webers you just get them right and never have to worry about touching them (well atleast I havent so far)

BTW I'll be selling my Twin 40's soon if anyones interested

_________________

i have a set of original engish SU's on my l18 at the moment with a lynx manifold. One of my mates uncles said to me one day "so youve got a datto hey! i have some SU's and a manifold for a datto in my shed you can have"
yo ho!!
they run really well and seem to make lots more power than the hitachi SU's that used to be on this l18.
They make the car sound great, but no way near as good as webers

_________________
Circuit Race 1600 in the build

I've got some english SU's sitting under the house somewhere. I ripped them off a wreck I had. I think they would need reconditioning, and I have no idea of the size. I might check it out tonight

_________________

Mad1600 what you are saying about the SU's needing constant re-tuning is true only if the SU's in question are in need of a rebuild with worn/bent needles etc.
In good working order SU's would require little re-tuning once correctly setup.
I think most people might have used a set of worn out SU's at some point in the past, and due to the wear in the parts and the constant tuning required I believe this has contributed to the myth of SU's be unreliable.
My old Hitachi SU clones were O'rrible to keep in tune, they would need adjusting every three to four days.

I completely stand behind twin 44mm ( ) or 1 3/4inch British SU's, as an excellent street carb setup.
On full noise they do sound like webers